Power optimization - Improve SPI sleep mode
Ensure that all pins are set to their default configuration during sleep mode. Disable the workaround for FTPAN58 (SPI freezes when transfering a single byte) at the end of the transfer. This disables the resources needed for the workaround. Those changes reduce the power usage by 430-490µA.
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@ -27,7 +27,8 @@ bool Spi::WriteCmdAndBuffer(const uint8_t* cmd, size_t cmdSize, const uint8_t* d
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}
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}
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bool Spi::Init() {
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bool Spi::Init() {
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nrf_gpio_pin_set(pinCsn); /* disable Set slave select (inactive high) */
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nrf_gpio_cfg_output(pinCsn);
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nrf_gpio_pin_set(pinCsn);
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return true;
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return true;
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}
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}
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@ -204,6 +204,9 @@ bool SpiMaster::Write(uint8_t pinCsn, const uint8_t* data, size_t size) {
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;
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;
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nrf_gpio_pin_set(this->pinCsn);
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nrf_gpio_pin_set(this->pinCsn);
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currentBufferAddr = 0;
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currentBufferAddr = 0;
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DisableWorkaroundForFtpan58(spiBaseAddress, 0, 0);
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xSemaphoreGive(mutex);
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xSemaphoreGive(mutex);
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}
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}
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@ -10,6 +10,7 @@ SpiNorFlash::SpiNorFlash(Spi& spi) : spi {spi} {
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}
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}
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void SpiNorFlash::Init() {
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void SpiNorFlash::Init() {
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spi.Init();
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device_id = ReadIdentificaion();
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device_id = ReadIdentificaion();
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NRF_LOG_INFO("[SpiNorFlash] Manufacturer : %d, Memory type : %d, memory density : %d",
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NRF_LOG_INFO("[SpiNorFlash] Manufacturer : %d, Memory type : %d, memory density : %d",
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device_id.manufacturer,
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device_id.manufacturer,
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@ -23,10 +24,12 @@ void SpiNorFlash::Uninit() {
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void SpiNorFlash::Sleep() {
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void SpiNorFlash::Sleep() {
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auto cmd = static_cast<uint8_t>(Commands::DeepPowerDown);
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auto cmd = static_cast<uint8_t>(Commands::DeepPowerDown);
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spi.Write(&cmd, sizeof(uint8_t));
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spi.Write(&cmd, sizeof(uint8_t));
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spi.Sleep();
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NRF_LOG_INFO("[SpiNorFlash] Sleep")
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NRF_LOG_INFO("[SpiNorFlash] Sleep")
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}
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}
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void SpiNorFlash::Wakeup() {
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void SpiNorFlash::Wakeup() {
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spi.Wakeup();
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// send Commands::ReleaseFromDeepPowerDown then 3 dummy bytes before reading Device ID
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// send Commands::ReleaseFromDeepPowerDown then 3 dummy bytes before reading Device ID
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static constexpr uint8_t cmdSize = 4;
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static constexpr uint8_t cmdSize = 4;
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uint8_t cmd[cmdSize] = {static_cast<uint8_t>(Commands::ReleaseFromDeepPowerDown), 0x01, 0x02, 0x03};
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uint8_t cmd[cmdSize] = {static_cast<uint8_t>(Commands::ReleaseFromDeepPowerDown), 0x01, 0x02, 0x03};
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@ -187,10 +187,13 @@ void St7789::HardwareReset() {
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void St7789::Sleep() {
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void St7789::Sleep() {
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SleepIn();
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SleepIn();
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nrf_gpio_cfg_default(pinDataCommand);
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nrf_gpio_cfg_default(pinDataCommand);
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nrf_gpio_cfg_default(26);
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spi.Sleep();
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NRF_LOG_INFO("[LCD] Sleep");
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NRF_LOG_INFO("[LCD] Sleep");
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}
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}
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void St7789::Wakeup() {
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void St7789::Wakeup() {
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spi.Wakeup();
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nrf_gpio_cfg_output(pinDataCommand);
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nrf_gpio_cfg_output(pinDataCommand);
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SleepOut();
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SleepOut();
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VerticalScrollStartAddress(verticalScrollingStartAddress);
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VerticalScrollStartAddress(verticalScrollingStartAddress);
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