zyphlar
1277 lines
41 KiB
Arduino
1277 lines
41 KiB
Arduino
/*
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* Baby Mobile Audio Board v2 — nRF52840 Firmware
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*
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* Platform: Seeed XIAO nRF52840 (or MDBT50Q module)
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* Framework: Adafruit nRF52 Arduino Core
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*
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* Features:
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* - USB Mass Storage: drag-and-drop .raw audio files
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* - BLE: wireless audio upload from phone/Web Bluetooth
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* - 8-bit 8kHz PWM audio playback from IS25LP128F SPI flash
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* - DC motor PWM speed control
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* - 8 button inputs with debounce
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* - Deep sleep with button wake (~10µA)
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* - Auto-shutoff timer
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*
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* Audio format: unsigned 8-bit PCM, 8000 Hz, mono
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* Convert: ffmpeg -i song.mp3 -ar 8000 -ac 1 -f u8 -acodec pcm_u8 song.raw
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*
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* Board setup in Arduino IDE:
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* Board: "Seeed XIAO nRF52840" (or "Adafruit Feather nRF52840")
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* Install: Seeed nRF52 Boards via Board Manager
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*
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* Wiring (XIAO pin names):
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* D0 (P0.02) - Button 1
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* D1 (P0.03) - Button 2
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* D2 (P0.28) - Button 3
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* D3 (P0.29) - Button 4
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* D4 (P0.04) - Button 5
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* D5 (P0.05) - Button 6
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* D6 (P1.11) - Button 7
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* D7 (P1.12) - Button 8
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* D8 (P0.07) - SPI SCK → Flash pin 6
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* D9 (P0.06) - SPI MISO → Flash pin 2
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* D10 (P0.05) - SPI MOSI → Flash pin 5
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* A0 (P0.02) - Audio PWM output → R+C LPF → PAM8302A
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* A1 (P0.03) - Amp ~SD (HIGH=on)
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* A2 (P0.28) - Motor PWM → MOSFET gate
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* A3 (P0.29) - LED output
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* A4 (P0.04) - Flash ~CS
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* A5 (P0.05) - (spare)
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*
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* NOTE: Pin assignments above are illustrative. Adjust to your actual
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* XIAO pinout and PCB routing. The XIAO has 11 usable GPIOs on the
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* edge pins plus additional pads on the bottom.
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*/
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#include <SPI.h>
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#include <Adafruit_TinyUSB.h>
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#include <bluefruit.h>
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// ============================================================
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// POC MODE: stream audio from internal LittleFS instead of SPI flash.
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// Upload tracks via BLE (CMD 0x02 [track_num] + data packets).
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// WAV files are accepted — 44-byte PCM header is stripped on receipt.
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// Disable this define to revert to full SPI flash mode.
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// ============================================================
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#define POC_INTERNAL_FLASH
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#ifdef POC_INTERNAL_FLASH
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#include <Adafruit_LittleFS.h>
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#include <InternalFileSystem.h>
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using namespace Adafruit_LittleFS_Namespace;
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#endif
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// ============================================================
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// PIN DEFINITIONS — adjust for your PCB
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// ============================================================
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// Using raw nRF52840 GPIO numbers for flexibility.
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// Map these to your actual PCB connections.
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// Audio
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#define PIN_AUDIO_PWM 0 // Any PWM-capable pin
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#define PIN_AMP_SD 6 // PAM8302A shutdown (HIGH=enabled)
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// Motor
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#define PIN_MOTOR_PWM 15 // PWM to MOSFET gate
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// SPI Flash
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#define PIN_FLASH_CS 2 // Flash chip select
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// SPI MOSI/MISO/SCK use default SPI pins
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// Buttons (directly to GPIO, active LOW with internal pull-up)
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#define PIN_BTN1 4
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#define PIN_BTN2 1
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#define PIN_BTN3 5
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#define PIN_BTN4 3
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/*
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#define PIN_BTN5 4
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#define PIN_BTN6 5
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#define PIN_BTN7 3
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#define PIN_BTN8 4
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*/
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// PIN_LED is 11 (LED_R)
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// LED_B is 13/12
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// LED_G is 12/13
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const uint8_t BTN_PINS[] = {
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PIN_BTN1, PIN_BTN2, PIN_BTN3, PIN_BTN4,
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/*PIN_BTN5, PIN_BTN6, PIN_BTN7, PIN_BTN8*/
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};
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#define NUM_BUTTONS 4
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// ============================================================
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// FLASH CONSTANTS
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// ============================================================
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#define FLASH_SIZE (16UL * 1024UL * 1024UL) // 16MB
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#define FLASH_SECTOR 4096
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#define FLASH_PAGE 256
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#define FLASH_BLOCK_64K (64UL * 1024UL)
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// IS25LP128F / W25Q128 compatible commands
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#define CMD_READ 0x03
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#define CMD_FAST_READ 0x0B
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#define CMD_WRITE_EN 0x06
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#define CMD_PAGE_PROG 0x02
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#define CMD_SECT_ERASE 0x20
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#define CMD_BLOCK_ERASE 0xD8
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#define CMD_CHIP_ERASE 0xC7
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#define CMD_READ_SR1 0x05
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#define CMD_JEDEC_ID 0x9F
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#define CMD_POWER_DOWN 0xB9
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#define CMD_WAKE 0xAB
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// ============================================================
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// TRACK TABLE FORMAT
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// ============================================================
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// Sector 0 (first 4KB) holds the track index:
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// [0] uint8_t magic = 0xBB (indicates valid table)
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// [1] uint8_t num_tracks
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// [2..3] reserved
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// [4..] Track entries, 12 bytes each:
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// uint32_t start_addr (big-endian)
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// uint32_t byte_length (big-endian)
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// uint8_t sample_rate_khz (8 = 8kHz)
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// uint8_t bits (8 = 8-bit unsigned)
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// uint16_t reserved
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// Audio data starts at AUDIO_START (sector 1 = 0x1000)
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#define TRACK_TABLE_ADDR 0x000000
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#define AUDIO_START_ADDR 0x001000
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#define TABLE_MAGIC 0xBB
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#define MAX_TRACKS 32
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#define TRACK_ENTRY_SIZE 12
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// ============================================================
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// AUDIO CONFIG
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// ============================================================
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#define SAMPLE_RATE 16000
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#define AUDIO_BUF_SIZE 512 // larger buffer = fewer SPI transactions
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#define SILENCE 128 // 0x80 = center for unsigned 8-bit
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// ============================================================
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// USB MASS STORAGE
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// ============================================================
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Adafruit_USBD_MSC usb_msc;
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// Simple FAT12 filesystem on the SPI flash
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// We present the entire 16MB flash as a USB drive.
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// The host can write raw files; firmware scans for audio on boot.
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// MSC callbacks
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int32_t msc_read_cb(uint32_t lba, void* buffer, uint32_t bufsize);
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int32_t msc_write_cb(uint32_t lba, uint8_t* buffer, uint32_t bufsize);
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void msc_flush_cb(void);
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bool msc_start_stop_cb(uint8_t power_condition, bool start, bool load_eject);
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#define MSC_BLOCK_SIZE 512
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#define MSC_BLOCK_COUNT (FLASH_SIZE / MSC_BLOCK_SIZE)
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// ============================================================
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// BLE SERVICE
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// ============================================================
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BLEService audioSvc = BLEService("12340001-0000-1000-8000-00805f9b34fb");
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BLECharacteristic audioCmd = BLECharacteristic("12340002-0000-1000-8000-00805f9b34fb");
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BLECharacteristic audioData = BLECharacteristic("12340003-0000-1000-8000-00805f9b34fb");
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BLECharacteristic audioStat = BLECharacteristic("12340004-0000-1000-8000-00805f9b34fb");
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// BLE upload state
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volatile bool g_bleUploading = false;
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volatile uint32_t g_bleWriteAddr = 0;
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volatile uint32_t g_bleWriteLen = 0;
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#ifdef POC_INTERNAL_FLASH
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File g_pocFile(InternalFS); // open file handle (read or write)
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uint8_t g_pocWriteTrack = 0; // track slot being written via BLE
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bool g_pocSkipHeader = false; // strip WAV header from first data packet
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#endif
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// ============================================================
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// GLOBAL STATE
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// ============================================================
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volatile bool g_playing = false;
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volatile bool g_motorOn = false;
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uint8_t g_motorSpeed = 160;
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uint8_t g_numTracks = 0;
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uint32_t g_trackStart[MAX_TRACKS];
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uint32_t g_trackLen[MAX_TRACKS];
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uint8_t g_currentTrack = 0;
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// Audio DMA buffers — uint16_t PWM duty-cycle values for EasyDMA
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static uint16_t g_pwmBuf[2][AUDIO_BUF_SIZE];
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volatile bool g_bufReady[2] = {false, false};
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uint32_t g_trackDoneMs = 0; // nonzero = millis() deadline after which we stop
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uint32_t g_nextReadAddr = 0;
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uint32_t g_playEnd = 0;
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// Timers
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unsigned long g_lastActivity = 0;
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#define AUTO_OFF_MS (30UL * 60UL * 1000UL) // 30 min auto-shutoff
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#define IDLE_SLEEP_MS (10UL * 60UL * 1000UL) // 10 min idle → sleep
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// USB connected flag
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volatile bool g_usbConnected = false;
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#ifdef POC_INTERNAL_FLASH
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static void pocFilename(uint8_t n, char *buf) { // buf must be >=16 bytes
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snprintf(buf, 16, "/track%d.raw", n);
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}
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#endif
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// ============================================================
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// SPI FLASH DRIVER
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// ============================================================
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SPISettings flashSPI(8000000, MSBFIRST, SPI_MODE0); // 8MHz
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void flashSelect() { digitalWrite(PIN_FLASH_CS, LOW); }
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void flashDeselect() { digitalWrite(PIN_FLASH_CS, HIGH); }
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void flashWake() {
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flashSelect();
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SPI.transfer(CMD_WAKE);
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flashDeselect();
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delayMicroseconds(5);
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}
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void flashSleep() {
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flashSelect();
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SPI.transfer(CMD_POWER_DOWN);
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flashDeselect();
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}
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uint32_t flashReadJEDEC() {
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_JEDEC_ID);
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uint32_t id = (uint32_t)SPI.transfer(0) << 16;
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id |= (uint32_t)SPI.transfer(0) << 8;
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id |= SPI.transfer(0);
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flashDeselect();
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SPI.endTransaction();
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return id;
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}
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void flashReadBytes(uint32_t addr, uint8_t *buf, uint32_t len) {
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_READ);
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SPI.transfer((addr >> 16) & 0xFF);
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SPI.transfer((addr >> 8) & 0xFF);
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SPI.transfer(addr & 0xFF);
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for (uint32_t i = 0; i < len; i++) {
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buf[i] = SPI.transfer(0);
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}
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flashDeselect();
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SPI.endTransaction();
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}
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void flashWaitBusy() {
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_READ_SR1);
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while (SPI.transfer(0) & 0x01) { /* spin */ }
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flashDeselect();
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SPI.endTransaction();
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}
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void flashWriteEnable() {
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_WRITE_EN);
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flashDeselect();
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SPI.endTransaction();
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}
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void flashEraseSector(uint32_t addr) {
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flashWriteEnable();
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_SECT_ERASE);
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SPI.transfer((addr >> 16) & 0xFF);
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SPI.transfer((addr >> 8) & 0xFF);
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SPI.transfer(addr & 0xFF);
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flashDeselect();
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SPI.endTransaction();
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flashWaitBusy();
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}
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void flashEraseBlock64K(uint32_t addr) {
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flashWriteEnable();
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_BLOCK_ERASE);
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SPI.transfer((addr >> 16) & 0xFF);
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SPI.transfer((addr >> 8) & 0xFF);
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SPI.transfer(addr & 0xFF);
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flashDeselect();
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SPI.endTransaction();
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flashWaitBusy();
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}
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void flashPageProgram(uint32_t addr, const uint8_t *data, uint16_t len) {
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flashWriteEnable();
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SPI.beginTransaction(flashSPI);
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flashSelect();
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SPI.transfer(CMD_PAGE_PROG);
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SPI.transfer((addr >> 16) & 0xFF);
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SPI.transfer((addr >> 8) & 0xFF);
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SPI.transfer(addr & 0xFF);
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for (uint16_t i = 0; i < len; i++) {
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SPI.transfer(data[i]);
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}
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flashDeselect();
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SPI.endTransaction();
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flashWaitBusy();
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}
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// ============================================================
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// TRACK TABLE
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// ============================================================
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void loadTrackTable() {
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#ifdef POC_INTERNAL_FLASH
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g_numTracks = 0;
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char fname[16];
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for (uint8_t i = 0; i < MAX_TRACKS; i++) {
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pocFilename(i, fname);
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File f(InternalFS);
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if (!f.open(fname, FILE_O_READ)) break;
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g_trackLen[i] = f.size();
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f.close();
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g_numTracks = i + 1;
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}
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Serial.print("Found ");
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Serial.print(g_numTracks);
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Serial.println(" tracks in internal flash");
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#else
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uint8_t header[4];
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flashReadBytes(TRACK_TABLE_ADDR, header, 4);
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if (header[0] != TABLE_MAGIC) {
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g_numTracks = 0;
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Serial.println("No track table found (flash may be empty)");
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return;
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}
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g_numTracks = header[1];
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if (g_numTracks > MAX_TRACKS) g_numTracks = MAX_TRACKS;
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uint8_t entry[TRACK_ENTRY_SIZE];
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for (uint8_t i = 0; i < g_numTracks; i++) {
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flashReadBytes(TRACK_TABLE_ADDR + 4 + i * TRACK_ENTRY_SIZE, entry, TRACK_ENTRY_SIZE);
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g_trackStart[i] = ((uint32_t)entry[0] << 24) | ((uint32_t)entry[1] << 16) |
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((uint32_t)entry[2] << 8) | entry[3];
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g_trackLen[i] = ((uint32_t)entry[4] << 24) | ((uint32_t)entry[5] << 16) |
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((uint32_t)entry[6] << 8) | entry[7];
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}
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Serial.print("Loaded ");
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Serial.print(g_numTracks);
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Serial.println(" tracks from flash");
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for (uint8_t i = 0; i < g_numTracks; i++) {
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Serial.print(" Track ");
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Serial.print(i + 1);
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Serial.print(": addr=0x");
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Serial.print(g_trackStart[i], HEX);
|
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Serial.print(", ");
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Serial.print(g_trackLen[i] / SAMPLE_RATE);
|
||
Serial.println("s");
|
||
}
|
||
#endif
|
||
}
|
||
|
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void writeTrackTable() {
|
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#ifdef POC_INTERNAL_FLASH
|
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return; // no table needed; LittleFS files are the store
|
||
#else
|
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// Erase sector 0
|
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flashEraseSector(0);
|
||
|
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// Build table in RAM
|
||
uint8_t table[4 + MAX_TRACKS * TRACK_ENTRY_SIZE];
|
||
memset(table, 0xFF, sizeof(table));
|
||
table[0] = TABLE_MAGIC;
|
||
table[1] = g_numTracks;
|
||
table[2] = 0;
|
||
table[3] = 0;
|
||
|
||
for (uint8_t i = 0; i < g_numTracks; i++) {
|
||
uint8_t *e = &table[4 + i * TRACK_ENTRY_SIZE];
|
||
e[0] = (g_trackStart[i] >> 24) & 0xFF;
|
||
e[1] = (g_trackStart[i] >> 16) & 0xFF;
|
||
e[2] = (g_trackStart[i] >> 8) & 0xFF;
|
||
e[3] = g_trackStart[i] & 0xFF;
|
||
e[4] = (g_trackLen[i] >> 24) & 0xFF;
|
||
e[5] = (g_trackLen[i] >> 16) & 0xFF;
|
||
e[6] = (g_trackLen[i] >> 8) & 0xFF;
|
||
e[7] = g_trackLen[i] & 0xFF;
|
||
e[8] = 8; // sample rate kHz
|
||
e[9] = 8; // bits
|
||
e[10] = 0;
|
||
e[11] = 0;
|
||
}
|
||
|
||
// Write in pages
|
||
uint16_t total = 4 + g_numTracks * TRACK_ENTRY_SIZE;
|
||
for (uint16_t offset = 0; offset < total; offset += FLASH_PAGE) {
|
||
uint16_t chunk = min((uint16_t)FLASH_PAGE, (uint16_t)(total - offset));
|
||
flashPageProgram(offset, &table[offset], chunk);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// USB MASS STORAGE CALLBACKS
|
||
// ============================================================
|
||
|
||
int32_t msc_read_cb(uint32_t lba, void* buffer, uint32_t bufsize) {
|
||
uint32_t addr = lba * MSC_BLOCK_SIZE;
|
||
flashReadBytes(addr, (uint8_t*)buffer, bufsize);
|
||
return bufsize;
|
||
}
|
||
|
||
int32_t msc_write_cb(uint32_t lba, uint8_t* buffer, uint32_t bufsize) {
|
||
uint32_t addr = lba * MSC_BLOCK_SIZE;
|
||
|
||
// Erase sector if we're at a sector boundary
|
||
if ((addr % FLASH_SECTOR) == 0) {
|
||
flashEraseSector(addr);
|
||
}
|
||
|
||
// Write in page-sized chunks
|
||
uint32_t written = 0;
|
||
while (written < bufsize) {
|
||
uint16_t pageOffset = (addr + written) % FLASH_PAGE;
|
||
uint16_t chunk = min((uint16_t)(FLASH_PAGE - pageOffset), (uint16_t)(bufsize - written));
|
||
flashPageProgram(addr + written, buffer + written, chunk);
|
||
written += chunk;
|
||
}
|
||
|
||
return bufsize;
|
||
}
|
||
|
||
void msc_flush_cb(void) {
|
||
// After USB write completes, reload the track table
|
||
// (host may have written a new FAT filesystem)
|
||
// We scan for audio data on eject instead
|
||
}
|
||
|
||
bool msc_start_stop_cb(uint8_t power_condition, bool start, bool load_eject) {
|
||
if (!start && load_eject) {
|
||
// Host ejected the drive — rescan for tracks
|
||
Serial.println("USB ejected, rescanning tracks...");
|
||
loadTrackTable();
|
||
}
|
||
return true;
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// BLE SETUP
|
||
// ============================================================
|
||
|
||
void ble_connect_cb(uint16_t conn_handle) {
|
||
Serial.println("BLE connected");
|
||
g_lastActivity = millis();
|
||
}
|
||
|
||
void ble_disconnect_cb(uint16_t conn_handle, uint8_t reason) {
|
||
Serial.println("BLE disconnected");
|
||
g_bleUploading = false;
|
||
}
|
||
|
||
// BLE command characteristic: receives commands
|
||
// CMD 0x01 [num_tracks] [track_entries...] = write track table
|
||
// CMD 0x02 [addr_3bytes] = start writing audio at address
|
||
// CMD 0x03 = finish upload, reload tracks
|
||
// CMD 0x04 [track_num] = play track
|
||
// CMD 0x05 = stop playback
|
||
void audioCmd_write_cb(uint16_t conn_handle, BLECharacteristic* chr,
|
||
uint8_t* data, uint16_t len) {
|
||
if (len < 1) return;
|
||
g_lastActivity = millis();
|
||
|
||
switch (data[0]) {
|
||
case 0x01: // Write track table
|
||
if (len >= 2) {
|
||
g_numTracks = data[1];
|
||
if (g_numTracks > MAX_TRACKS) g_numTracks = MAX_TRACKS;
|
||
// Parse track entries from data[2..]
|
||
for (uint8_t i = 0; i < g_numTracks && (2 + i * 8 + 7) < len; i++) {
|
||
uint8_t *e = &data[2 + i * 8];
|
||
g_trackStart[i] = ((uint32_t)e[0] << 24) | ((uint32_t)e[1] << 16) |
|
||
((uint32_t)e[2] << 8) | e[3];
|
||
g_trackLen[i] = ((uint32_t)e[4] << 24) | ((uint32_t)e[5] << 16) |
|
||
((uint32_t)e[6] << 8) | e[7];
|
||
}
|
||
writeTrackTable();
|
||
Serial.println("BLE: Track table updated");
|
||
}
|
||
break;
|
||
|
||
case 0x02: // Start audio write
|
||
#ifdef POC_INTERNAL_FLASH
|
||
if (len >= 2) {
|
||
g_pocWriteTrack = data[1];
|
||
if (g_pocFile) g_pocFile.close();
|
||
char fname[16];
|
||
pocFilename(g_pocWriteTrack, fname);
|
||
if (!g_pocFile.open(fname, FILE_O_WRITE)) {
|
||
Serial.print("BLE: cannot open ");
|
||
Serial.println(fname);
|
||
break;
|
||
}
|
||
g_bleUploading = true;
|
||
g_pocSkipHeader = true;
|
||
g_bleWriteLen = 0;
|
||
Serial.print("BLE: Start write track ");
|
||
Serial.println(g_pocWriteTrack);
|
||
}
|
||
#else
|
||
if (len >= 4) {
|
||
g_bleWriteAddr = ((uint32_t)data[1] << 16) | ((uint32_t)data[2] << 8) | data[3];
|
||
g_bleUploading = true;
|
||
// Erase 64K block at target
|
||
flashEraseBlock64K(g_bleWriteAddr & ~(FLASH_BLOCK_64K - 1));
|
||
Serial.print("BLE: Start write at 0x");
|
||
Serial.println(g_bleWriteAddr, HEX);
|
||
}
|
||
#endif
|
||
break;
|
||
|
||
case 0x03: // Finish upload
|
||
#ifdef POC_INTERNAL_FLASH
|
||
if (g_pocFile) g_pocFile.close();
|
||
g_pocSkipHeader = false;
|
||
#endif
|
||
g_bleUploading = false;
|
||
loadTrackTable();
|
||
Serial.println("BLE: Upload complete");
|
||
break;
|
||
|
||
case 0x04: // Play track
|
||
if (len >= 2 && data[1] < g_numTracks) {
|
||
audioStart(data[1]);
|
||
}
|
||
break;
|
||
|
||
case 0x05: // Stop
|
||
audioStop();
|
||
motorStop();
|
||
break;
|
||
}
|
||
}
|
||
|
||
// BLE data characteristic: receives raw audio bytes for upload
|
||
void audioData_write_cb(uint16_t conn_handle, BLECharacteristic* chr,
|
||
uint8_t* data, uint16_t len) {
|
||
if (!g_bleUploading) return;
|
||
g_lastActivity = millis();
|
||
|
||
#ifdef POC_INTERNAL_FLASH
|
||
uint8_t *src = data;
|
||
uint16_t srcLen = len;
|
||
|
||
// Strip 44-byte WAV header from first packet if present
|
||
if (g_pocSkipHeader) {
|
||
g_pocSkipHeader = false;
|
||
if (srcLen >= 4 && src[0]=='R' && src[1]=='I' && src[2]=='F' && src[3]=='F') {
|
||
if (srcLen > 44) {
|
||
src += 44;
|
||
srcLen -= 44;
|
||
} else {
|
||
// Header spans packets — drop whole packet (document: send raw PCM instead)
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
g_pocFile.write(src, srcLen);
|
||
g_bleWriteLen += srcLen;
|
||
#else
|
||
// Erase new sectors as we cross boundaries
|
||
uint32_t endAddr = g_bleWriteAddr + len;
|
||
uint32_t currentSector = g_bleWriteAddr / FLASH_SECTOR;
|
||
uint32_t endSector = (endAddr - 1) / FLASH_SECTOR;
|
||
for (uint32_t s = currentSector + 1; s <= endSector; s++) {
|
||
flashEraseSector(s * FLASH_SECTOR);
|
||
}
|
||
|
||
// Write data page by page
|
||
uint16_t written = 0;
|
||
while (written < len) {
|
||
uint16_t pageOff = (g_bleWriteAddr + written) % FLASH_PAGE;
|
||
uint16_t chunk = min((uint16_t)(FLASH_PAGE - pageOff), (uint16_t)(len - written));
|
||
flashPageProgram(g_bleWriteAddr + written, data + written, chunk);
|
||
written += chunk;
|
||
}
|
||
|
||
g_bleWriteAddr += len;
|
||
g_bleWriteLen += len;
|
||
#endif
|
||
|
||
// Update status characteristic with bytes written
|
||
uint8_t stat[4];
|
||
stat[0] = (g_bleWriteLen >> 24) & 0xFF;
|
||
stat[1] = (g_bleWriteLen >> 16) & 0xFF;
|
||
stat[2] = (g_bleWriteLen >> 8) & 0xFF;
|
||
stat[3] = g_bleWriteLen & 0xFF;
|
||
audioStat.write(stat, 4);
|
||
audioStat.notify(stat, 4);
|
||
}
|
||
|
||
void setupBLE() {
|
||
/* Note BLE requires a custom app to communicate, not regular bluetooth */
|
||
Bluefruit.begin();
|
||
Bluefruit.setName("BabyMobile");
|
||
Bluefruit.setTxPower(0); // 0 dBm — save power, short range is fine
|
||
Bluefruit.Periph.setConnectCallback(ble_connect_cb);
|
||
Bluefruit.Periph.setDisconnectCallback(ble_disconnect_cb);
|
||
|
||
// Audio service
|
||
audioSvc.begin();
|
||
|
||
// Command characteristic (write)
|
||
audioCmd.setProperties(CHR_PROPS_WRITE);
|
||
audioCmd.setPermission(SECMODE_OPEN, SECMODE_OPEN);
|
||
audioCmd.setMaxLen(240);
|
||
audioCmd.setWriteCallback(audioCmd_write_cb);
|
||
audioCmd.begin();
|
||
|
||
// Data characteristic (write without response for speed)
|
||
audioData.setProperties(CHR_PROPS_WRITE_WO_RESP);
|
||
audioData.setPermission(SECMODE_OPEN, SECMODE_OPEN);
|
||
audioData.setMaxLen(240);
|
||
audioData.setWriteCallback(audioData_write_cb);
|
||
audioData.begin();
|
||
|
||
// Status characteristic (read + notify)
|
||
audioStat.setProperties(CHR_PROPS_READ | CHR_PROPS_NOTIFY);
|
||
audioStat.setPermission(SECMODE_OPEN, SECMODE_NO_ACCESS);
|
||
audioStat.setMaxLen(4);
|
||
audioStat.begin();
|
||
|
||
// Start advertising
|
||
Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
|
||
Bluefruit.Advertising.addTxPower();
|
||
Bluefruit.Advertising.addService(audioSvc);
|
||
Bluefruit.Advertising.addName();
|
||
Bluefruit.Advertising.restartOnDisconnect(true);
|
||
Bluefruit.Advertising.setInterval(160, 320); // 100-200ms
|
||
Bluefruit.Advertising.start(0); // advertise forever
|
||
|
||
Serial.println("BLE advertising as 'BabyMobile'");
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// AUDIO PLAYBACK — nRF52840 PWM EasyDMA
|
||
// ============================================================
|
||
//
|
||
// NRF_PWM0 drives the audio pin directly via DMA — no per-sample ISR.
|
||
// PRESCALER = 0 → 16 MHz base clock
|
||
// COUNTERTOP = 500 → PWM carrier = 16 MHz / 500 = 32 kHz
|
||
// SEQ REFRESH = 1 → each sample plays 2 carrier cycles → 16 kHz sample rate
|
||
//
|
||
// Double-buffer: SEQ[0] / SEQ[1] auto-chain via SHORTS.
|
||
// ISR fires only on SEQEND (every 512 samples = 32 ms), sets g_bufReady[b]=false.
|
||
// loop() calls audioFillBuf() to reload the finished buffer.
|
||
|
||
#define PWM_COUNTERTOP 500 // 16 MHz / 500 = 32 kHz carrier
|
||
#define PWM_SILENCE 250 // midpoint of 0–500 duty-cycle range
|
||
|
||
// Software gain: 1=unity, 2=2x, etc. Adjustable via 'u'/'d' serial.
|
||
static uint8_t g_audioGain = 1;
|
||
|
||
// Read PCM into g_pwmBuf[b], pad tail with silence.
|
||
// On the first pure-silence fill (track exhausted), arms the stop timer.
|
||
static void audioFillBuf(uint8_t b) {
|
||
uint8_t pcm[AUDIO_BUF_SIZE];
|
||
uint32_t toRead = 0;
|
||
if (g_nextReadAddr < g_playEnd) {
|
||
toRead = min((uint32_t)AUDIO_BUF_SIZE, g_playEnd - g_nextReadAddr);
|
||
#ifdef POC_INTERNAL_FLASH
|
||
g_pocFile.read(pcm, toRead);
|
||
#else
|
||
flashReadBytes(g_nextReadAddr, pcm, toRead);
|
||
#endif
|
||
g_nextReadAddr += toRead;
|
||
}
|
||
for (uint32_t i = 0; i < toRead; i++) {
|
||
int16_t s = (int16_t)pcm[i] - 128;
|
||
s *= g_audioGain;
|
||
if (s > 127) s = 127;
|
||
if (s < -128) s = -128;
|
||
g_pwmBuf[b][i] = (uint16_t)((uint8_t)(s + 128)) * PWM_COUNTERTOP / 256;
|
||
}
|
||
for (uint32_t i = toRead; i < AUDIO_BUF_SIZE; i++) {
|
||
g_pwmBuf[b][i] = PWM_SILENCE;
|
||
}
|
||
g_bufReady[b] = true;
|
||
// Arm stop timer on first pure-silence fill (all audio already sent to DMA)
|
||
if (toRead == 0 && g_trackDoneMs == 0) {
|
||
g_trackDoneMs = millis() + 100; // 100ms > 3 buffer lengths (3 × 32ms)
|
||
}
|
||
}
|
||
|
||
// PWM0 ISR — fires every 32 ms (512 samples at 16 kHz).
|
||
// Just signals which buffer needs refilling; loop() does the actual I/O.
|
||
// ISR just chains buffers — end-of-track is handled entirely in loop()
|
||
extern "C" void PWM0_IRQHandler() {
|
||
if (NRF_PWM0->EVENTS_SEQEND[0]) {
|
||
NRF_PWM0->EVENTS_SEQEND[0] = 0;
|
||
if (g_playing) { g_bufReady[0] = false; NRF_PWM0->TASKS_SEQSTART[1] = 1; }
|
||
}
|
||
if (NRF_PWM0->EVENTS_SEQEND[1]) {
|
||
NRF_PWM0->EVENTS_SEQEND[1] = 0;
|
||
if (g_playing) { g_bufReady[1] = false; NRF_PWM0->TASKS_SEQSTART[0] = 1; }
|
||
}
|
||
}
|
||
|
||
void audioInit() {
|
||
// Silence both DMA buffers
|
||
for (int i = 0; i < AUDIO_BUF_SIZE; i++) {
|
||
g_pwmBuf[0][i] = PWM_SILENCE;
|
||
g_pwmBuf[1][i] = PWM_SILENCE;
|
||
}
|
||
|
||
// Configure NRF_PWM0 for EasyDMA sequence mode
|
||
NRF_PWM0->PSEL.OUT[0] = g_ADigitalPinMap[PIN_AUDIO_PWM];
|
||
NRF_PWM0->PSEL.OUT[1] = 0x80000000UL; // disconnected
|
||
NRF_PWM0->PSEL.OUT[2] = 0x80000000UL;
|
||
NRF_PWM0->PSEL.OUT[3] = 0x80000000UL;
|
||
NRF_PWM0->ENABLE = PWM_ENABLE_ENABLE_Enabled;
|
||
NRF_PWM0->MODE = PWM_MODE_UPDOWN_Up;
|
||
NRF_PWM0->PRESCALER = PWM_PRESCALER_PRESCALER_DIV_1; // 16 MHz
|
||
NRF_PWM0->COUNTERTOP = PWM_COUNTERTOP;
|
||
NRF_PWM0->LOOP = 0;
|
||
NRF_PWM0->DECODER = (PWM_DECODER_LOAD_Common << PWM_DECODER_LOAD_Pos) |
|
||
(PWM_DECODER_MODE_RefreshCount << PWM_DECODER_MODE_Pos);
|
||
|
||
NRF_PWM0->SEQ[0].PTR = (uint32_t)g_pwmBuf[0];
|
||
NRF_PWM0->SEQ[0].CNT = AUDIO_BUF_SIZE;
|
||
NRF_PWM0->SEQ[0].REFRESH = 1; // each value plays for 2 PWM periods
|
||
NRF_PWM0->SEQ[0].ENDDELAY = 0;
|
||
NRF_PWM0->SEQ[1].PTR = (uint32_t)g_pwmBuf[1];
|
||
NRF_PWM0->SEQ[1].CNT = AUDIO_BUF_SIZE;
|
||
NRF_PWM0->SEQ[1].REFRESH = 1;
|
||
NRF_PWM0->SEQ[1].ENDDELAY = 0;
|
||
|
||
NRF_PWM0->SHORTS = 0; // no auto-shorts; ISR handles sequence chaining
|
||
NRF_PWM0->INTENSET = PWM_INTENSET_SEQEND0_Msk | PWM_INTENSET_SEQEND1_Msk;
|
||
NVIC_SetPriority(PWM0_IRQn, 7);
|
||
NVIC_EnableIRQ(PWM0_IRQn);
|
||
|
||
// Start PWM outputting silence (amp is off, so this is silent)
|
||
NRF_PWM0->TASKS_SEQSTART[0] = 1;
|
||
}
|
||
|
||
void audioStart(uint8_t trackNum) {
|
||
Serial.print("Playing track ");
|
||
Serial.print(trackNum + 1);
|
||
Serial.print(" of ");
|
||
Serial.println(g_numTracks);
|
||
if (trackNum >= g_numTracks) return;
|
||
|
||
g_currentTrack = trackNum;
|
||
|
||
#ifdef POC_INTERNAL_FLASH
|
||
if (g_pocFile) g_pocFile.close();
|
||
char fname[16];
|
||
pocFilename(trackNum, fname);
|
||
if (!g_pocFile.open(fname, FILE_O_READ)) {
|
||
Serial.print("audioStart: cannot open "); Serial.println(fname);
|
||
return;
|
||
}
|
||
g_nextReadAddr = 0;
|
||
g_playEnd = g_trackLen[trackNum];
|
||
#else
|
||
g_nextReadAddr = g_trackStart[trackNum];
|
||
g_playEnd = g_nextReadAddr + g_trackLen[trackNum];
|
||
#endif
|
||
|
||
g_trackDoneMs = 0;
|
||
g_bufReady[0] = false;
|
||
g_bufReady[1] = false;
|
||
|
||
// Stop DMA cleanly, fill both buffers, restart
|
||
NRF_PWM0->TASKS_STOP = 1;
|
||
uint32_t t = millis();
|
||
while (!NRF_PWM0->EVENTS_STOPPED && millis() - t < 10) {}
|
||
NRF_PWM0->EVENTS_STOPPED = 0;
|
||
|
||
audioFillBuf(0);
|
||
audioFillBuf(1);
|
||
|
||
NRF_PWM0->SEQ[0].PTR = (uint32_t)g_pwmBuf[0];
|
||
NRF_PWM0->SEQ[1].PTR = (uint32_t)g_pwmBuf[1];
|
||
|
||
// Enable amplifier
|
||
digitalWrite(PIN_AMP_SD, HIGH);
|
||
delay(10);
|
||
|
||
g_playing = true;
|
||
NRF_PWM0->TASKS_SEQSTART[0] = 1;
|
||
}
|
||
|
||
void audioStop() {
|
||
g_playing = false;
|
||
g_trackDoneMs = 0; // cancel any pending auto-advance
|
||
NRF_PWM0->TASKS_STOP = 1;
|
||
|
||
#ifdef POC_INTERNAL_FLASH
|
||
if (g_pocFile) g_pocFile.close();
|
||
#endif
|
||
|
||
// Disable amp
|
||
digitalWrite(PIN_AMP_SD, LOW);
|
||
Serial.println("Playback stopped");
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// MOTOR
|
||
// ============================================================
|
||
|
||
void motorInit() {
|
||
pinMode(PIN_MOTOR_PWM, OUTPUT);
|
||
analogWrite(PIN_MOTOR_PWM, 0);
|
||
}
|
||
|
||
void motorStart(uint8_t speed) {
|
||
g_motorSpeed = speed;
|
||
g_motorOn = true;
|
||
analogWrite(PIN_MOTOR_PWM, speed);
|
||
}
|
||
|
||
void motorStop() {
|
||
g_motorOn = false;
|
||
analogWrite(PIN_MOTOR_PWM, 0);
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// BUTTONS
|
||
// ============================================================
|
||
|
||
void buttonsInit() {
|
||
for (uint8_t i = 0; i < NUM_BUTTONS; i++) {
|
||
pinMode(BTN_PINS[i], INPUT_PULLUP);
|
||
}
|
||
}
|
||
|
||
// Returns 1-8, or 0 if none pressed
|
||
uint8_t buttonRead() {
|
||
for (uint8_t i = 0; i < NUM_BUTTONS; i++) {
|
||
// Buttons pull to ground
|
||
if (digitalRead(BTN_PINS[i]) == LOW) {
|
||
delay(20); // debounce
|
||
if (digitalRead(BTN_PINS[i]) == LOW) {
|
||
return i + 1;
|
||
}
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
void waitButtonRelease(uint8_t btn) {
|
||
unsigned long deadline = millis() + 300;
|
||
while (buttonRead() == btn && millis() < deadline) {}
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// SLEEP / WAKE
|
||
// ============================================================
|
||
|
||
void enterDeepSleep() {
|
||
// Don't sleep if any button is currently LOW — would wake instantly.
|
||
// Also catches floating pins that the internal pull-up isn't winning against.
|
||
for (uint8_t i = 0; i < NUM_BUTTONS; i++) {
|
||
if (digitalRead(BTN_PINS[i]) == LOW) {
|
||
g_lastActivity = millis(); // postpone
|
||
return;
|
||
}
|
||
}
|
||
|
||
Serial.println("Entering deep sleep...");
|
||
audioStop();
|
||
motorStop();
|
||
#ifndef POC_INTERNAL_FLASH
|
||
flashSleep();
|
||
#endif
|
||
digitalWrite(PIN_LED, LOW);
|
||
|
||
// Stop BLE advertising to save power
|
||
Bluefruit.Advertising.stop();
|
||
|
||
// Configure buttons as wake sources.
|
||
// nrf_gpio_cfg_sense_input takes nRF GPIO numbers, not Arduino pin numbers —
|
||
// use g_ADigitalPinMap[] to convert.
|
||
for (uint8_t i = 0; i < NUM_BUTTONS; i++) {
|
||
nrf_gpio_cfg_sense_input(g_ADigitalPinMap[BTN_PINS[i]],
|
||
NRF_GPIO_PIN_PULLUP,
|
||
NRF_GPIO_PIN_SENSE_LOW);
|
||
}
|
||
|
||
// System OFF — lowest power, wakes via GPIO sense or reset
|
||
sd_power_system_off();
|
||
|
||
// Execution stops here. Device resets on wake.
|
||
// (This line is never reached)
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// SETUP
|
||
// ============================================================
|
||
|
||
void setup() {
|
||
// LED early — visual feedback
|
||
pinMode(PIN_LED, OUTPUT);
|
||
digitalWrite(PIN_LED, HIGH);
|
||
|
||
Serial.begin(115200);
|
||
Serial.println("...");
|
||
|
||
int c=0;
|
||
while(c<10) {
|
||
// pinMode(c, OUTPUT);
|
||
delay(250);
|
||
digitalWrite(PIN_LED, HIGH);
|
||
// digitalWrite(c, HIGH);
|
||
// Serial.println("0");
|
||
delay(250);
|
||
digitalWrite(PIN_LED, LOW);
|
||
// digitalWrite(c, LOW);
|
||
// Serial.println(c);
|
||
c++;
|
||
}
|
||
|
||
Serial.println("=== Baby Mobile v2 ===");
|
||
Serial.println("nRF52840 + IS25LP128F + PAM8302A");
|
||
|
||
// Pin setup
|
||
pinMode(PIN_AMP_SD, OUTPUT);
|
||
digitalWrite(PIN_AMP_SD, LOW);
|
||
|
||
#ifdef POC_INTERNAL_FLASH
|
||
InternalFS.begin();
|
||
Serial.println("InternalFS mounted");
|
||
#else
|
||
pinMode(PIN_FLASH_CS, OUTPUT);
|
||
digitalWrite(PIN_FLASH_CS, HIGH);
|
||
|
||
// SPI
|
||
SPI.begin();
|
||
|
||
// Flash
|
||
flashWake();
|
||
delay(1);
|
||
uint32_t jedec = flashReadJEDEC();
|
||
Serial.print("Flash JEDEC: 0x");
|
||
Serial.println(jedec, HEX);
|
||
|
||
if (jedec == 0x9D6018 || jedec == 0x9D6017 || // IS25LP128F / IS25LP064
|
||
jedec == 0xEF4018 || jedec == 0xEF4017) { // W25Q128 / W25Q064
|
||
Serial.println("Flash detected OK");
|
||
} else if (jedec == 0x000000 || jedec == 0xFFFFFF) {
|
||
Serial.println("WARNING: No flash detected! Check SPI wiring.");
|
||
}
|
||
#endif
|
||
|
||
// Load tracks
|
||
loadTrackTable();
|
||
|
||
// Buttons
|
||
buttonsInit();
|
||
|
||
// Motor
|
||
motorInit();
|
||
|
||
// Audio
|
||
audioInit();
|
||
|
||
// USB Mass Storage
|
||
#ifndef POC_INTERNAL_FLASH
|
||
usb_msc.setID("BabyMobile", "Audio Drive", "2.0");
|
||
usb_msc.setReadWriteCallback(msc_read_cb, msc_write_cb, msc_flush_cb);
|
||
//usb_msc.setStartStopCallback(msc_start_stop_cb); // unused in nrf?
|
||
usb_msc.setCapacity(MSC_BLOCK_COUNT, MSC_BLOCK_SIZE);
|
||
//usb_msc.setReadOnly(false);
|
||
usb_msc.setUnitReady(true);
|
||
usb_msc.begin();
|
||
#endif
|
||
|
||
// BLE
|
||
setupBLE();
|
||
|
||
g_lastActivity = millis();
|
||
|
||
digitalWrite(PIN_LED, HIGH);
|
||
Serial.println("Ready! Plug in USB to upload audio, or press a button.");
|
||
}
|
||
|
||
|
||
// ============================================================
|
||
// MAIN LOOP
|
||
// ============================================================
|
||
|
||
// ============================================================
|
||
// SERIAL UPLOAD STATE MACHINE (POC_INTERNAL_FLASH only)
|
||
// ============================================================
|
||
#ifdef POC_INTERNAL_FLASH
|
||
enum SerUploadState { SER_IDLE, SER_RECEIVING };
|
||
static SerUploadState g_serState = SER_IDLE;
|
||
static char g_serLineBuf[64] = {0};
|
||
static uint8_t g_serLineLen = 0;
|
||
static uint8_t g_serTrack = 0;
|
||
static uint32_t g_serBytesExpected = 0;
|
||
static uint32_t g_serBytesReceived = 0;
|
||
static bool g_serSkipHeader = false;
|
||
static File g_serFile(InternalFS);
|
||
|
||
static void serUploadTick() {
|
||
if (g_serState == SER_IDLE) {
|
||
// Accumulate characters until newline
|
||
while (Serial.available()) {
|
||
// Serial.print("r");
|
||
char c = (char)Serial.read();
|
||
if (c == '\n' || c == '\r') {
|
||
g_serLineBuf[g_serLineLen] = '\0';
|
||
if (g_serLineLen == 0) { g_serLineLen = 0; break; }
|
||
// Parse: UPLOAD <track> <len>
|
||
unsigned int utrk = 0, ulen = 0;
|
||
if (sscanf(g_serLineBuf, "UPLOAD %u %u", &utrk, &ulen) == 2) {
|
||
g_serTrack = (uint8_t)utrk;
|
||
g_serBytesExpected = (uint32_t)ulen;
|
||
g_serBytesReceived = 0;
|
||
g_serSkipHeader = true;
|
||
|
||
char fname[16];
|
||
pocFilename(g_serTrack, fname);
|
||
if (g_serFile) g_serFile.close();
|
||
// Remove first — FILE_O_WRITE has no truncate flag
|
||
InternalFS.remove(fname);
|
||
if (!g_serFile.open(fname, FILE_O_WRITE)) {
|
||
Serial.print("ERR cannot open ");
|
||
Serial.println(fname);
|
||
} else {
|
||
g_serState = SER_RECEIVING;
|
||
g_usbConnected = true;
|
||
Serial.println("READY");
|
||
}
|
||
} else if (sscanf(g_serLineBuf, "DUMP %u", &utrk) == 1) {
|
||
// Hex-dump first 256 bytes of a track file
|
||
char fname[16];
|
||
pocFilename((uint8_t)utrk, fname);
|
||
File df(InternalFS);
|
||
if (df.open(fname, FILE_O_READ)) {
|
||
uint32_t fsz = df.size();
|
||
Serial.print("SIZE "); Serial.println(fsz);
|
||
uint8_t dbuf[16];
|
||
uint32_t limit = min(fsz, (uint32_t)256);
|
||
uint32_t off = 0;
|
||
while (off < limit) {
|
||
int n = df.read(dbuf, min((uint32_t)sizeof(dbuf), limit - off));
|
||
if (n <= 0) break;
|
||
for (int j = 0; j < n; j++) {
|
||
if (dbuf[j] < 0x10) Serial.print("0");
|
||
Serial.print(dbuf[j], HEX);
|
||
Serial.print(j % 16 == 15 || (off + j + 1) == limit ? "\n" : " ");
|
||
}
|
||
off += n;
|
||
}
|
||
df.close();
|
||
Serial.println("END");
|
||
} else {
|
||
Serial.println("NO FILE");
|
||
}
|
||
} else if (g_serLineLen == 1 && (g_serLineBuf[0] == 'u' || g_serLineBuf[0] == 'd')) {
|
||
if (g_serLineBuf[0] == 'u') g_audioGain++;
|
||
else if (g_audioGain > 1) g_audioGain--;
|
||
Serial.print("GAIN "); Serial.println(g_audioGain);
|
||
} else {
|
||
Serial.print("ERR bad cmd: ");
|
||
Serial.println(g_serLineBuf);
|
||
}
|
||
g_serLineLen = 0;
|
||
// Serial.print("0");
|
||
} else {
|
||
if (g_serLineLen < (sizeof(g_serLineBuf) - 1)) {
|
||
g_serLineBuf[g_serLineLen++] = c;
|
||
}
|
||
// Serial.print(",");
|
||
}
|
||
}
|
||
} else { // SER_RECEIVING
|
||
// Serial.print("e");
|
||
uint8_t chunk[64];
|
||
while (Serial.available() && g_serBytesReceived < g_serBytesExpected) {
|
||
// Serial.print(";");
|
||
int n = Serial.readBytes(chunk, min((int)sizeof(chunk),
|
||
(int)(g_serBytesExpected - g_serBytesReceived)));
|
||
if (n <= 0) break;
|
||
|
||
uint8_t *src = chunk;
|
||
uint16_t srcLen = (uint16_t)n;
|
||
|
||
// Strip 44-byte WAV header from first chunk if present
|
||
if (g_serSkipHeader) {
|
||
g_serSkipHeader = false;
|
||
if (srcLen >= 4 && src[0]=='R' && src[1]=='I' && src[2]=='F' && src[3]=='F') {
|
||
if (srcLen > 44) { src += 44; srcLen -= 44; }
|
||
else { g_serBytesReceived += n; continue; }
|
||
}
|
||
}
|
||
|
||
int32_t wr = g_serFile.write(src, srcLen);
|
||
if (wr != (int32_t)srcLen) {
|
||
// Write failed (LittleFS full or error) — abort immediately.
|
||
// Do NOT loop printing errors; that fills USB CDC TX and hangs.
|
||
g_serFile.close();
|
||
g_usbConnected = false;
|
||
g_serState = SER_IDLE;
|
||
Serial.print("ERR WRITE_FAIL at=");
|
||
Serial.println(g_serBytesReceived);
|
||
break;
|
||
}
|
||
g_serBytesReceived += n;
|
||
}
|
||
|
||
if (g_serState != SER_RECEIVING) return; // aborted in write-fail handler above
|
||
|
||
if (g_serBytesReceived >= g_serBytesExpected) {
|
||
g_serFile.close();
|
||
// Reopen to read the actual flushed size from LittleFS
|
||
char fname2[16]; pocFilename(g_serTrack, fname2);
|
||
File tmp(InternalFS);
|
||
uint32_t fsz = 0;
|
||
if (tmp.open(fname2, FILE_O_READ)) { fsz = tmp.size(); tmp.close(); }
|
||
g_usbConnected = false;
|
||
g_serState = SER_IDLE;
|
||
loadTrackTable();
|
||
Serial.print("OK ");
|
||
Serial.print(fsz);
|
||
Serial.print("/");
|
||
Serial.println(g_serBytesReceived);
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
void loop() {
|
||
if (g_playing) g_lastActivity = millis();
|
||
|
||
// ---- Serial upload (POC mode) ----
|
||
#ifdef POC_INTERNAL_FLASH
|
||
serUploadTick();
|
||
#endif
|
||
|
||
// ---- Refill audio buffers ----
|
||
if (g_playing) {
|
||
for (uint8_t b = 0; b < 2; b++) {
|
||
if (!g_bufReady[b]) audioFillBuf(b);
|
||
}
|
||
}
|
||
|
||
// ---- End of track: timer-based stop ----
|
||
// g_trackDoneMs is armed 100ms after first silence fill.
|
||
// By then both DMA buffers have definitely cycled through silence.
|
||
if (g_playing && g_trackDoneMs != 0 && millis() >= g_trackDoneMs) {
|
||
g_trackDoneMs = 0;
|
||
audioStop();
|
||
if (g_numTracks > 0) {
|
||
g_currentTrack = (g_currentTrack + 1) % g_numTracks;
|
||
audioStart(g_currentTrack);
|
||
}
|
||
}
|
||
|
||
// ---- Handle buttons ----
|
||
// Per-button cooldown prevents phantom/stuck pins from re-firing
|
||
static unsigned long btnLastMs[NUM_BUTTONS + 1] = {0};
|
||
uint8_t btn = buttonRead();
|
||
if (btn > 0 && millis() - btnLastMs[btn] > 800) {
|
||
btnLastMs[btn] = millis();
|
||
Serial.print("BTN"); Serial.println(btn);
|
||
g_lastActivity = millis();
|
||
|
||
switch (btn) {
|
||
case 1: // Play / Pause
|
||
case 2:
|
||
case 3:
|
||
case 4:
|
||
case 5:
|
||
if (g_playing) {
|
||
audioStop();
|
||
} else if (g_numTracks > 0) {
|
||
audioStart(g_currentTrack);
|
||
}
|
||
break;
|
||
/*
|
||
case 4: // Next track
|
||
if (g_numTracks > 0) {
|
||
g_currentTrack = (g_currentTrack + 1) % g_numTracks;
|
||
if (g_playing) { audioStop(); audioStart(g_currentTrack); }
|
||
}
|
||
break;
|
||
|
||
case 5: // Previous track
|
||
if (g_numTracks > 0) {
|
||
g_currentTrack = (g_currentTrack == 0) ? g_numTracks - 1 : g_currentTrack - 1;
|
||
if (g_playing) { audioStop(); audioStart(g_currentTrack); }
|
||
}
|
||
break;
|
||
*/
|
||
case 6: // Motor toggle
|
||
if (g_motorOn) motorStop(); else motorStart(g_motorSpeed);
|
||
break;
|
||
|
||
case 7: // Motor faster
|
||
if (g_motorSpeed < 240) g_motorSpeed += 20;
|
||
if (g_motorOn) analogWrite(PIN_MOTOR_PWM, g_motorSpeed);
|
||
break;
|
||
|
||
case 8: // Motor slower
|
||
if (g_motorSpeed > 60) g_motorSpeed -= 20;
|
||
if (g_motorOn) analogWrite(PIN_MOTOR_PWM, g_motorSpeed);
|
||
break;
|
||
|
||
case 9: // Play all (music + motor)
|
||
motorStart(g_motorSpeed);
|
||
if (!g_playing && g_numTracks > 0) audioStart(0);
|
||
break;
|
||
|
||
case 10: // Stop all
|
||
audioStop();
|
||
motorStop();
|
||
break;
|
||
}
|
||
|
||
waitButtonRelease(btn);
|
||
}
|
||
|
||
// ---- Auto shutoff / idle sleep ----
|
||
if (millis() - g_lastActivity > AUTO_OFF_MS) {
|
||
enterDeepSleep();
|
||
}
|
||
|
||
if (!g_playing && !g_motorOn && !g_usbConnected && !g_bleUploading) {
|
||
if (millis() - g_lastActivity > IDLE_SLEEP_MS) {
|
||
enterDeepSleep();
|
||
}
|
||
}
|
||
|
||
}
|