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Simplify parameters and cleanup

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This commit is contained in:
Riku Isokoski 2021-08-16 18:26:10 +03:00
parent 1d341a7aeb
commit 81a36dc31e
3 changed files with 19 additions and 48 deletions
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43
src/drivers/TwiMaster.cpp
View File

@ -8,19 +8,20 @@ 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} {
TwiMaster::TwiMaster(NRF_TWIM_Type* module, uint32_t frequency, uint8_t pinSda, uint8_t pinScl)
: module {module}, frequency {frequency}, pinSda {pinSda}, pinScl {pinScl} {
mutex = xSemaphoreCreateBinary();
}
void TwiMaster::ConfigurePins() const {
NRF_GPIO->PIN_CNF[params.pinScl] =
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[params.pinSda] =
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) |
@ -31,28 +32,12 @@ void TwiMaster::ConfigurePins() const {
void TwiMaster::Init() {
ConfigurePins();
switch (module) {
case Modules::TWIM1:
twiBaseAddress = NRF_TWIM1;
break;
default:
return;
}
twiBaseAddress = module;
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->FREQUENCY = frequency;
twiBaseAddress->PSEL.SCL = params.pinScl;
twiBaseAddress->PSEL.SDA = params.pinSda;
twiBaseAddress->PSEL.SCL = pinScl;
twiBaseAddress->PSEL.SDA = pinSda;
twiBaseAddress->EVENTS_LASTRX = 0;
twiBaseAddress->EVENTS_STOPPED = 0;
twiBaseAddress->EVENTS_LASTTX = 0;
@ -63,12 +48,6 @@ void TwiMaster::Init() {
twiBaseAddress->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos);
/* // IRQ
NVIC_ClearPendingIRQ(_IRQn);
NVIC_SetPriority(_IRQn, 2);
NVIC_EnableIRQ(_IRQn);
*/
xSemaphoreGive(mutex);
}
@ -194,12 +173,10 @@ void TwiMaster::Wakeup() {
* */
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;
ConfigurePins();
Sleep();
// Re-enable I²C
twiBaseAddress->ENABLE = twi_state;
}

19
src/drivers/TwiMaster.h
View File

@ -8,16 +8,9 @@ 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;
uint8_t pinSda;
uint8_t pinScl;
};
TwiMaster(const Modules module, const Parameters& params);
TwiMaster(NRF_TWIM_Type* module, uint32_t frequency, uint8_t pinSda, uint8_t pinScl);
void Init();
ErrorCodes Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* buffer, size_t size);
@ -26,16 +19,18 @@ 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);
void FixHwFreezed();
void ConfigurePins() const;
NRF_TWIM_Type* twiBaseAddress;
SemaphoreHandle_t mutex = nullptr;
const Modules module;
const Parameters params;
NRF_TWIM_Type* module;
uint32_t frequency;
uint8_t pinSda;
uint8_t pinScl;
static constexpr uint8_t maxDataSize {16};
static constexpr uint8_t registerSize {1};
uint8_t internalBuffer[maxDataSize + registerSize];

5
src/main.cpp
View File

@ -81,9 +81,8 @@ Pinetime::Drivers::SpiNorFlash spiNorFlash {flashSpi};
// The TWI device should work @ up to 400Khz but there is a HW bug which prevent it from
// respecting correct timings. According to erratas heet, this magic value makes it run
// at ~390Khz with correct timings.
static constexpr uint32_t MaxTwiFrequencyWithoutHardwareBug {0x06200000};
Pinetime::Drivers::TwiMaster twiMaster {Pinetime::Drivers::TwiMaster::Modules::TWIM1,
Pinetime::Drivers::TwiMaster::Parameters {MaxTwiFrequencyWithoutHardwareBug, pinTwiSda, pinTwiScl}};
//static constexpr uint32_t MaxTwiFrequencyWithoutHardwareBug {0x06200000};
Pinetime::Drivers::TwiMaster twiMaster {NRF_TWIM1, TWI_FREQUENCY_FREQUENCY_K250, pinTwiSda, pinTwiScl};
Pinetime::Drivers::Cst816S touchPanel {twiMaster, touchPanelTwiAddress};
#ifdef PINETIME_IS_RECOVERY
static constexpr bool isFactory = true;