Apply display driver datasheet delays
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7e460d3c80
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@ -1,7 +1,4 @@
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#include "drivers/St7789.h"
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#include <hal/nrf_gpio.h>
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#include <nrfx_log.h>
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#include "drivers/Spi.h"
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using namespace Pinetime::Drivers;
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@ -53,22 +50,52 @@ void St7789::WriteSpi(const uint8_t* data, size_t size, const std::function<void
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}
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void St7789::SoftwareReset() {
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EnsureSleepOutPostDelay();
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WriteCommand(static_cast<uint8_t>(Commands::SoftwareReset));
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vTaskDelay(pdMS_TO_TICKS(150));
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// If sleep in: must wait 120ms before sleep out can sent (see driver datasheet)
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// Unconditionally wait as software reset doesn't need to be performant
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sleepIn = true;
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lastSleepExit = xTaskGetTickCount();
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vTaskDelay(pdMS_TO_TICKS(125));
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}
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void St7789::SleepOut() {
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if (!sleepIn) {
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return;
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}
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WriteCommand(static_cast<uint8_t>(Commands::SleepOut));
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// Wait 5ms for clocks to stabilise
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// pdMS rounds down => 6 used here
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vTaskDelay(pdMS_TO_TICKS(6));
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// Cannot send sleep in or software reset for 120ms
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lastSleepExit = xTaskGetTickCount();
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sleepIn = false;
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}
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void St7789::EnsureSleepOutPostDelay() {
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TickType_t delta = xTaskGetTickCount() - lastSleepExit;
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// Due to timer wraparound, there is a chance of delaying when not necessary
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// It is very low (pdMS_TO_TICKS(125)/2^32) and waiting an extra 125ms isn't too bad
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if (delta < pdMS_TO_TICKS(125)) {
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vTaskDelay(pdMS_TO_TICKS(125) - delta);
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}
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}
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void St7789::SleepIn() {
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if (sleepIn) {
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return;
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}
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EnsureSleepOutPostDelay();
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WriteCommand(static_cast<uint8_t>(Commands::SleepIn));
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// Wait 5ms for clocks to stabilise
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// pdMS rounds down => 6 used here
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vTaskDelay(pdMS_TO_TICKS(6));
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sleepIn = true;
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}
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void St7789::ColMod() {
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WriteCommand(static_cast<uint8_t>(Commands::ColMod));
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WriteData(0x55);
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vTaskDelay(pdMS_TO_TICKS(10));
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}
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void St7789::MemoryDataAccessControl() {
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@ -105,12 +132,10 @@ void St7789::RowAddressSet() {
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void St7789::DisplayInversionOn() {
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WriteCommand(static_cast<uint8_t>(Commands::DisplayInversionOn));
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vTaskDelay(pdMS_TO_TICKS(10));
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}
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void St7789::NormalModeOn() {
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WriteCommand(static_cast<uint8_t>(Commands::NormalModeOn));
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vTaskDelay(pdMS_TO_TICKS(10));
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}
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void St7789::DisplayOn() {
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@ -145,7 +170,6 @@ void St7789::SetVdv() {
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void St7789::DisplayOff() {
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WriteCommand(static_cast<uint8_t>(Commands::DisplayOff));
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vTaskDelay(pdMS_TO_TICKS(500));
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}
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void St7789::VerticalScrollStartAddress(uint16_t line) {
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@ -165,8 +189,13 @@ void St7789::DrawBuffer(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
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void St7789::HardwareReset() {
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nrf_gpio_pin_clear(pinReset);
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vTaskDelay(pdMS_TO_TICKS(10));
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vTaskDelay(pdMS_TO_TICKS(1));
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nrf_gpio_pin_set(pinReset);
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// If hardware reset started while sleep out, reset time may be up to 120ms
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// Unconditionally wait as hardware reset doesn't need to be performant
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sleepIn = true;
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lastSleepExit = xTaskGetTickCount();
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vTaskDelay(pdMS_TO_TICKS(125));
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}
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void St7789::Sleep() {
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@ -3,6 +3,10 @@
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#include <cstdint>
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#include <functional>
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#include <hal/nrf_gpio.h>
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#include <nrfx_log.h>
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#include "drivers/Spi.h"
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namespace Pinetime {
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namespace Drivers {
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class Spi;
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@ -30,10 +34,13 @@ namespace Pinetime {
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uint8_t pinDataCommand;
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uint8_t pinReset;
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uint8_t verticalScrollingStartAddress = 0;
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bool sleepIn;
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TickType_t lastSleepExit;
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void HardwareReset();
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void SoftwareReset();
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void SleepOut();
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void EnsureSleepOutPostDelay();
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void SleepIn();
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void ColMod();
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void MemoryDataAccessControl();
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