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Power optimization - Improve SPI sleep mode

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Calls to Spi::Init() are not needed, pin initialization is already done in ctor().
Remove calls to Spi::Sleep()/Spi::Wakeup() to ensure that SPI CS pins are kept high even in sleep mode.
This commit is contained in:
Jean-François Milants 2023-05-18 15:18:56 +02:00 committed by JF
parent 4c0f897953
commit 62848b33fb
2 changed files with 0 additions and 6 deletions
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3
src/drivers/SpiNorFlash.cpp
View file

@ -10,7 +10,6 @@ SpiNorFlash::SpiNorFlash(Spi& spi) : spi {spi} {
} }
void SpiNorFlash::Init() { void SpiNorFlash::Init() {
spi.Init();
device_id = ReadIdentificaion(); device_id = ReadIdentificaion();
NRF_LOG_INFO("[SpiNorFlash] Manufacturer : %d, Memory type : %d, memory density : %d", NRF_LOG_INFO("[SpiNorFlash] Manufacturer : %d, Memory type : %d, memory density : %d",
device_id.manufacturer, device_id.manufacturer,
@ -24,12 +23,10 @@ void SpiNorFlash::Uninit() {
void SpiNorFlash::Sleep() { void SpiNorFlash::Sleep() {
auto cmd = static_cast<uint8_t>(Commands::DeepPowerDown); auto cmd = static_cast<uint8_t>(Commands::DeepPowerDown);
spi.Write(&cmd, sizeof(uint8_t)); spi.Write(&cmd, sizeof(uint8_t));
spi.Sleep();
NRF_LOG_INFO("[SpiNorFlash] Sleep") NRF_LOG_INFO("[SpiNorFlash] Sleep")
} }
void SpiNorFlash::Wakeup() { void SpiNorFlash::Wakeup() {
spi.Wakeup();
// send Commands::ReleaseFromDeepPowerDown then 3 dummy bytes before reading Device ID // send Commands::ReleaseFromDeepPowerDown then 3 dummy bytes before reading Device ID
static constexpr uint8_t cmdSize = 4; static constexpr uint8_t cmdSize = 4;
uint8_t cmd[cmdSize] = {static_cast<uint8_t>(Commands::ReleaseFromDeepPowerDown), 0x01, 0x02, 0x03}; uint8_t cmd[cmdSize] = {static_cast<uint8_t>(Commands::ReleaseFromDeepPowerDown), 0x01, 0x02, 0x03};

3
src/drivers/St7789.cpp
View file

@ -10,7 +10,6 @@ St7789::St7789(Spi& spi, uint8_t pinDataCommand) : spi {spi}, pinDataCommand {pi
} }
void St7789::Init() { void St7789::Init() {
spi.Init();
nrf_gpio_cfg_output(pinDataCommand); nrf_gpio_cfg_output(pinDataCommand);
nrf_gpio_cfg_output(26); nrf_gpio_cfg_output(26);
nrf_gpio_pin_set(26); nrf_gpio_pin_set(26);
@ -188,12 +187,10 @@ void St7789::Sleep() {
SleepIn(); SleepIn();
nrf_gpio_cfg_default(pinDataCommand); nrf_gpio_cfg_default(pinDataCommand);
nrf_gpio_cfg_default(26); nrf_gpio_cfg_default(26);
spi.Sleep();
NRF_LOG_INFO("[LCD] Sleep"); NRF_LOG_INFO("[LCD] Sleep");
} }
void St7789::Wakeup() { void St7789::Wakeup() {
spi.Wakeup();
nrf_gpio_cfg_output(pinDataCommand); nrf_gpio_cfg_output(pinDataCommand);
SleepOut(); SleepOut();
VerticalScrollStartAddress(verticalScrollingStartAddress); VerticalScrollStartAddress(verticalScrollingStartAddress);