pinetime/InfiniTime
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Optimize twiMaster

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This commit is contained in:
Riku Isokoski 2021-08-09 17:45:24 +03:00
parent 514481ef7f
commit baa7e1bf12
2 changed files with 23 additions and 24 deletions
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43
src/drivers/TwiMaster.cpp
View file

@ -9,21 +9,25 @@ using namespace Pinetime::Drivers;
// TODO use DMA/IRQ
TwiMaster::TwiMaster(const Modules module, const Parameters& params) : module {module}, params {params} {
mutex = xSemaphoreCreateBinary();
}
void TwiMaster::ConfigurePins() const {
NRF_GPIO->PIN_CNF[params.pinScl] =
(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) |
(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
NRF_GPIO->PIN_CNF[params.pinSda] =
(GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) |
(GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
(GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
(GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
}
void TwiMaster::Init() {
if(mutex == nullptr)
mutex = xSemaphoreCreateBinary();
NRF_GPIO->PIN_CNF[params.pinScl] =
((uint32_t) GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) | ((uint32_t) GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
((uint32_t) GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) | ((uint32_t) GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
((uint32_t) GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
NRF_GPIO->PIN_CNF[params.pinSda] =
((uint32_t) GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) | ((uint32_t) GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
((uint32_t) GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) | ((uint32_t) GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) |
((uint32_t) GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
ConfigurePins();
switch (module) {
case Modules::TWIM1:
@ -179,7 +183,8 @@ void TwiMaster::Sleep() {
}
void TwiMaster::Wakeup() {
Init();
ConfigurePins();
twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos);
NRF_LOG_INFO("[TWIMASTER] Wakeup");
}
@ -194,16 +199,8 @@ void TwiMaster::FixHwFreezed() {
uint32_t twi_state = NRF_TWI1->ENABLE;
twiBaseAddress->ENABLE = TWIM_ENABLE_ENABLE_Disabled << TWI_ENABLE_ENABLE_Pos;
NRF_GPIO->PIN_CNF[params.pinScl] =
((uint32_t) GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) | ((uint32_t) GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
((uint32_t) GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) | ((uint32_t) GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
((uint32_t) GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
NRF_GPIO->PIN_CNF[params.pinSda] =
((uint32_t) GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) | ((uint32_t) GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
((uint32_t) GPIO_PIN_CNF_PULL_Pullup << GPIO_PIN_CNF_PULL_Pos) | ((uint32_t) GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
((uint32_t) GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
ConfigurePins();
// Re-enable I²C
twiBaseAddress->ENABLE = twi_state;
}
}

4
src/drivers/TwiMaster.h
View file

@ -26,6 +26,8 @@ namespace Pinetime {
void Sleep();
void Wakeup();
void ConfigurePins() const;
private:
ErrorCodes Read(uint8_t deviceAddress, uint8_t* buffer, size_t size, bool stop);
ErrorCodes Write(uint8_t deviceAddress, const uint8_t* data, size_t size, bool stop);
@ -41,4 +43,4 @@ namespace Pinetime {
static constexpr uint32_t HwFreezedDelay {161000};
};
}
}
}