InfiniSim/sim/drivers/TwiMaster.cpp

188 lines
6.0 KiB
C++

#include "drivers/TwiMaster.h"
#include <cstring>
#include <hal/nrf_gpio.h>
#include <nrfx_log.h>
using namespace Pinetime::Drivers;
// TODO use shortcut to automatically send STOP when receive LastTX, for example
// TODO use DMA/IRQ
TwiMaster::TwiMaster(NRF_TWIM_Type* module, uint32_t frequency, uint8_t pinSda, uint8_t pinScl)
: module {module}, frequency {frequency}, pinSda {pinSda}, pinScl {pinScl} {
}
//void TwiMaster::ConfigurePins() const {
// NRF_GPIO->PIN_CNF[pinScl] =
// (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) |
// (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
// (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_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[pinSda] =
// (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos) |
// (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
// (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_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();
// }
//
// ConfigurePins();
//
// twiBaseAddress = module;
//
// twiBaseAddress->FREQUENCY = frequency;
//
// twiBaseAddress->PSEL.SCL = pinScl;
// twiBaseAddress->PSEL.SDA = pinSda;
// twiBaseAddress->EVENTS_LASTRX = 0;
// twiBaseAddress->EVENTS_STOPPED = 0;
// twiBaseAddress->EVENTS_LASTTX = 0;
// twiBaseAddress->EVENTS_ERROR = 0;
// twiBaseAddress->EVENTS_RXSTARTED = 0;
// twiBaseAddress->EVENTS_SUSPENDED = 0;
// twiBaseAddress->EVENTS_TXSTARTED = 0;
//
// twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos);
//
// xSemaphoreGive(mutex);
}
TwiMaster::ErrorCodes TwiMaster::Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* data, size_t size) {
// xSemaphoreTake(mutex, portMAX_DELAY);
// Wakeup();
// auto ret = Write(deviceAddress, &registerAddress, 1, false);
// ret = Read(deviceAddress, data, size, true);
// Sleep();
// xSemaphoreGive(mutex);
// return ret;
return TwiMaster::ErrorCodes::NoError;
}
TwiMaster::ErrorCodes TwiMaster::Write(uint8_t deviceAddress, uint8_t registerAddress, const uint8_t* data, size_t size) {
// ASSERT(size <= maxDataSize);
// xSemaphoreTake(mutex, portMAX_DELAY);
// Wakeup();
// internalBuffer[0] = registerAddress;
// std::memcpy(internalBuffer + 1, data, size);
// auto ret = Write(deviceAddress, internalBuffer, size + 1, true);
// Sleep();
// xSemaphoreGive(mutex);
// return ret;
return TwiMaster::ErrorCodes::NoError;
}
//TwiMaster::ErrorCodes TwiMaster::Read(uint8_t deviceAddress, uint8_t* buffer, size_t size, bool stop) {
// twiBaseAddress->ADDRESS = deviceAddress;
// twiBaseAddress->TASKS_RESUME = 0x1UL;
// twiBaseAddress->RXD.PTR = (uint32_t) buffer;
// twiBaseAddress->RXD.MAXCNT = size;
//
// twiBaseAddress->TASKS_STARTRX = 1;
//
// while (!twiBaseAddress->EVENTS_RXSTARTED && !twiBaseAddress->EVENTS_ERROR)
// ;
// twiBaseAddress->EVENTS_RXSTARTED = 0x0UL;
//
// txStartedCycleCount = DWT->CYCCNT;
// uint32_t currentCycleCount;
// while (!twiBaseAddress->EVENTS_LASTRX && !twiBaseAddress->EVENTS_ERROR) {
// currentCycleCount = DWT->CYCCNT;
// if ((currentCycleCount - txStartedCycleCount) > HwFreezedDelay) {
// FixHwFreezed();
// return ErrorCodes::TransactionFailed;
// }
// }
// twiBaseAddress->EVENTS_LASTRX = 0x0UL;
//
// if (stop || twiBaseAddress->EVENTS_ERROR) {
// twiBaseAddress->TASKS_STOP = 0x1UL;
// while (!twiBaseAddress->EVENTS_STOPPED)
// ;
// twiBaseAddress->EVENTS_STOPPED = 0x0UL;
// } else {
// twiBaseAddress->TASKS_SUSPEND = 0x1UL;
// while (!twiBaseAddress->EVENTS_SUSPENDED)
// ;
// twiBaseAddress->EVENTS_SUSPENDED = 0x0UL;
// }
//
// if (twiBaseAddress->EVENTS_ERROR) {
// twiBaseAddress->EVENTS_ERROR = 0x0UL;
// }
// return ErrorCodes::NoError;
//}
//TwiMaster::ErrorCodes TwiMaster::Write(uint8_t deviceAddress, const uint8_t* data, size_t size, bool stop) {
// twiBaseAddress->ADDRESS = deviceAddress;
// twiBaseAddress->TASKS_RESUME = 0x1UL;
// twiBaseAddress->TXD.PTR = (uint32_t) data;
// twiBaseAddress->TXD.MAXCNT = size;
//
// twiBaseAddress->TASKS_STARTTX = 1;
//
// while (!twiBaseAddress->EVENTS_TXSTARTED && !twiBaseAddress->EVENTS_ERROR)
// ;
// twiBaseAddress->EVENTS_TXSTARTED = 0x0UL;
//
// txStartedCycleCount = DWT->CYCCNT;
// uint32_t currentCycleCount;
// while (!twiBaseAddress->EVENTS_LASTTX && !twiBaseAddress->EVENTS_ERROR) {
// currentCycleCount = DWT->CYCCNT;
// if ((currentCycleCount - txStartedCycleCount) > HwFreezedDelay) {
// FixHwFreezed();
// return ErrorCodes::TransactionFailed;
// }
// }
// twiBaseAddress->EVENTS_LASTTX = 0x0UL;
//
// if (stop || twiBaseAddress->EVENTS_ERROR) {
// twiBaseAddress->TASKS_STOP = 0x1UL;
// while (!twiBaseAddress->EVENTS_STOPPED)
// ;
// twiBaseAddress->EVENTS_STOPPED = 0x0UL;
// } else {
// twiBaseAddress->TASKS_SUSPEND = 0x1UL;
// while (!twiBaseAddress->EVENTS_SUSPENDED)
// ;
// twiBaseAddress->EVENTS_SUSPENDED = 0x0UL;
// }
//
// if (twiBaseAddress->EVENTS_ERROR) {
// twiBaseAddress->EVENTS_ERROR = 0x0UL;
// uint32_t error = twiBaseAddress->ERRORSRC;
// twiBaseAddress->ERRORSRC = error;
// }
//
// return ErrorCodes::NoError;
//}
void TwiMaster::Sleep() {
// twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Disabled << TWIM_ENABLE_ENABLE_Pos);
}
void TwiMaster::Wakeup() {
// twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos);
}
/* Sometimes, the TWIM device just freeze and never set the event EVENTS_LASTTX.
* This method disable and re-enable the peripheral so that it works again.
* This is just a workaround, and it would be better if we could find a way to prevent
* this issue from happening.
* */
//void TwiMaster::FixHwFreezed() {
// NRF_LOG_INFO("I2C device frozen, reinitializing it!");
//
// uint32_t twi_state = NRF_TWI1->ENABLE;
//
// Sleep();
//
// twiBaseAddress->ENABLE = twi_state;
//}