scott/InfiniTime
1
0
Fork 0
Code Issues Pull requests Actions Packages Projects Releases 1 Wiki Activity

TwiMaster is now based on the NRFX TWI driver, as it handles more edge cases and workarounds for errors on the bus.

Browse source 
Reset the TWI bus after the soft-reset of the motion sensor to workaround issues on the TWI bus.
This commit is contained in:
Jean-François Milants 2021-04-08 20:07:24 +02:00
parent 1d7576de64
commit 9ac4be8b75
7 changed files with 67 additions and 207 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/CMakeLists.txt
View file

@ -83,7 +83,7 @@ set(SDK_SOURCE_FILES
"${NRF5_SDK_PATH}/external/fprintf/nrf_fprintf_format.c"
# TWI
"${NRF5_SDK_PATH}/modules/nrfx/drivers/src/nrfx_twi.c"
"${NRF5_SDK_PATH}/modules/nrfx/drivers/src/nrfx_twim.c"
# GPIOTE
"${NRF5_SDK_PATH}/components/libraries/gpiote/app_gpiote.c"

15
src/drivers/Bma421.cpp
View file

@ -35,12 +35,9 @@ Bma421::Bma421(TwiMaster& twiMaster, uint8_t twiAddress) : twiMaster{twiMaster},
}
void Bma421::Init() {
auto ret = bma4_soft_reset(&bma);
if(ret != BMA4_OK) return;
if(not isResetOk) return; // Call SoftReset (and reset TWI device) first!
nrf_delay_ms(1);
ret = bma423_init(&bma);
auto ret = bma423_init(&bma);
if(ret != BMA4_OK) return;
ret = bma423_write_config_file(&bma);
@ -109,3 +106,11 @@ bool Bma421::IsOk() const {
void Bma421::ResetStepCounter() {
bma423_reset_step_counter(&bma);
}
void Bma421::SoftReset() {
auto ret = bma4_soft_reset(&bma);
if(ret == BMA4_OK) {
isResetOk = true;
nrf_delay_ms(1);
}
}

4
src/drivers/Bma421.h
View file

@ -18,6 +18,9 @@ namespace Pinetime {
Bma421(Bma421&&) = delete;
Bma421& operator=(Bma421&&) = delete;
/// The chip freezes the TWI bus after the softreset operation. Softreset is separated from the
/// Init() method to allow the caller to uninit and then reinit the TWI device after the softreset.
void SoftReset();
void Init();
Values Process();
void ResetStepCounter();
@ -34,6 +37,7 @@ namespace Pinetime {
uint8_t deviceAddress = 0x18;
struct bma4_dev bma;
bool isOk = false;
bool isResetOk = false;
};
}
}

227
src/drivers/TwiMaster.cpp
View file

@ -2,195 +2,77 @@
#include <cstring>
#include <hal/nrf_gpio.h>
#include <nrfx_log.h>
#include <nrfx_twim.h>
#include <nrf_drv_twi.h>
using namespace Pinetime::Drivers;
// TODO use shortcut to automatically send STOP when receive LastTX, for example
// TODO use DMA/IRQ
TwiMaster::TwiMaster(const Modules module, const Parameters& params) : module{module}, params{params} {
mutex = xSemaphoreCreateBinary();
TwiMaster::TwiMaster(const Modules module, const Parameters& params) : module{module}, params{params}, mutex{xSemaphoreCreateBinary()} {
ASSERT(mutex != nullptr);
switch(module) {
case Modules::TWIM1:
default:
twim = NRFX_TWIM_INSTANCE(1);
break;
}
}
void TwiMaster::Init() {
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);
switch(module) {
case Modules::TWIM1: twiBaseAddress = NRF_TWIM1; break;
default:
return;
}
switch(static_cast<Frequencies>(params.frequency)) {
case Frequencies::Khz100 : twiBaseAddress->FREQUENCY = TWIM_FREQUENCY_FREQUENCY_K100; break;
case Frequencies::Khz250 : twiBaseAddress->FREQUENCY = TWIM_FREQUENCY_FREQUENCY_K250; break;
case Frequencies::Khz400 : twiBaseAddress->FREQUENCY = TWIM_FREQUENCY_FREQUENCY_K400; break;
}
twiBaseAddress->PSEL.SCL = params.pinScl;
twiBaseAddress->PSEL.SDA = params.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);
/* // IRQ
NVIC_ClearPendingIRQ(_IRQn);
NVIC_SetPriority(_IRQn, 2);
NVIC_EnableIRQ(_IRQn);
*/
nrfx_twim_config_t config;
config.frequency = static_cast<nrf_twim_frequency_t>(params.frequency);
config.hold_bus_uninit = false;
config.interrupt_priority = 0;
config.scl = params.pinScl;
config.sda = params.pinSda;
nrfx_twim_init(&twim,
&config,
nullptr,
nullptr);
nrfx_twim_enable(&twim);
xSemaphoreGive(mutex);
}
TwiMaster::ErrorCodes TwiMaster::Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t *data, size_t size) {
xSemaphoreTake(mutex, portMAX_DELAY);
auto ret = ReadWithRetry(deviceAddress, registerAddress, data, size);
TwiMaster::ErrorCodes ret;
auto err = nrfx_twim_tx(&twim, deviceAddress, &registerAddress, 1, false);
if(err != 0) {
return TwiMaster::ErrorCodes::TransactionFailed;
}
err = nrfx_twim_rx(&twim, deviceAddress, data, size);
if(err != 0) {
return TwiMaster::ErrorCodes::TransactionFailed;
}
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);
auto ret = WriteWithRetry(deviceAddress, registerAddress, data, size);
xSemaphoreGive(mutex);
return ret;
}
/* Execute a read transaction (composed of a write and a read operation). If one of these opeartion fails,
* it's retried once. If it fails again, an error is returned */
TwiMaster::ErrorCodes TwiMaster::ReadWithRetry(uint8_t deviceAddress, uint8_t registerAddress, uint8_t *data, size_t size) {
TwiMaster::ErrorCodes ret;
ret = Write(deviceAddress, &registerAddress, 1, false);
if(ret != ErrorCodes::NoError)
ret = Write(deviceAddress, &registerAddress, 1, false);
if(ret != ErrorCodes::NoError) return ret;
ret = Read(deviceAddress, data, size, true);
if(ret != ErrorCodes::NoError)
ret = Read(deviceAddress, data, size, true);
return ret;
}
/* Execute a write transaction. If it fails, it is retried once. If it fails again, an error is returned. */
TwiMaster::ErrorCodes TwiMaster::WriteWithRetry(uint8_t deviceAddress, uint8_t registerAddress, const uint8_t *data, size_t size) {
internalBuffer[0] = registerAddress;
std::memcpy(internalBuffer+1, data, size);
auto ret = Write(deviceAddress, internalBuffer, size+1, true);
if(ret != ErrorCodes::NoError)
ret = Write(deviceAddress, internalBuffer, size+1, true);
return ret;
auto err = nrfx_twim_tx(&twim, deviceAddress, internalBuffer , size+1, false);
if(err != 0){
return TwiMaster::ErrorCodes::TransactionFailed;
}
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;
xSemaphoreGive(mutex);
return TwiMaster::ErrorCodes::NoError;
}
void TwiMaster::Sleep() {
while(twiBaseAddress->ENABLE != 0) {
twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Disabled << TWIM_ENABLE_ENABLE_Pos);
}
nrfx_twim_disable(&twim);
nrfx_twim_uninit(&twim);
nrf_gpio_cfg_default(6);
nrf_gpio_cfg_default(7);
NRF_LOG_INFO("[TWIMASTER] Sleep");
@ -200,30 +82,3 @@ void TwiMaster::Wakeup() {
Init();
NRF_LOG_INFO("[TWIMASTER] Wakeup");
}
/* 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!");
// Disable I²C
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);
// Re-enable I²C
twiBaseAddress->ENABLE = twi_state;
}

14
src/drivers/TwiMaster.h
View file

@ -3,13 +3,13 @@
#include <semphr.h>
#include <drivers/include/nrfx_twi.h> // NRF_TWIM_Type
#include <cstdint>
#include <nrfx_twim.h>
namespace Pinetime {
namespace Drivers {
class TwiMaster {
public:
enum class Modules { TWIM1 };
enum class Frequencies {Khz100, Khz250, Khz400};
enum class ErrorCodes {NoError, TransactionFailed};
struct Parameters {
uint32_t frequency;
@ -27,21 +27,13 @@ namespace Pinetime {
void Wakeup();
private:
ErrorCodes ReadWithRetry(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* buffer, size_t size);
ErrorCodes WriteWithRetry(uint8_t deviceAddress, uint8_t registerAddress, const uint8_t* data, size_t size);
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);
void FixHwFreezed();
NRF_TWIM_Type* twiBaseAddress;
SemaphoreHandle_t mutex;
nrfx_twim_t twim;
const Modules module;
const Parameters params;
SemaphoreHandle_t mutex;
static constexpr uint8_t maxDataSize{8};
static constexpr uint8_t registerSize{1};
uint8_t internalBuffer[maxDataSize + registerSize];
uint32_t txStartedCycleCount = 0;
static constexpr uint32_t HwFreezedDelay{161000};
};
}
}

4
src/sdk_config.h
View file

@ -4992,7 +4992,7 @@
// <e> NRFX_TWIM_ENABLED - nrfx_twim - TWIM peripheral driver
//==========================================================
#ifndef NRFX_TWIM_ENABLED
#define NRFX_TWIM_ENABLED 0
#define NRFX_TWIM_ENABLED 1
#endif
// <q> NRFX_TWIM0_ENABLED - Enable TWIM0 instance
@ -5005,7 +5005,7 @@
#ifndef NRFX_TWIM1_ENABLED
#define NRFX_TWIM1_ENABLED 0
#define NRFX_TWIM1_ENABLED 1
#endif
// <o> NRFX_TWIM_DEFAULT_CONFIG_FREQUENCY - Frequency

8
src/systemtask/SystemTask.cpp
View file

@ -84,11 +84,15 @@ void SystemTask::Work() {
touchPanel.Init();
batteryController.Init();
motorController.Init();
motionSensor.SoftReset();
// Reset the TWI device because the motion sensor chip most probably crashed it...
twiMaster.Sleep();
twiMaster.Init();
motionSensor.Init();
settingsController.Init();
displayApp = std::make_unique<Pinetime::Applications::DisplayApp>(lcd, lvgl, touchPanel, batteryController, bleController,
dateTimeController, watchdogView, *this, notificationManager,
heartRateController, settingsController, motionController);