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#include "furi_hal_i2c_config.h"
#include <furi_hal_resources.h>
#include <furi_hal_version.h>
/** Timing register value is computed with the STM32CubeMX Tool,
* Standard Mode @100kHz with I2CCLK = 64 MHz,
* rise time = 0ns, fall time = 0ns
*/
#define FURI_HAL_I2C_CONFIG_POWER_I2C_TIMINGS_100 0x10707DBC
/** Timing register value is computed with the STM32CubeMX Tool,
* Fast Mode @400kHz with I2CCLK = 64 MHz,
* rise time = 0ns, fall time = 0ns
*/
#define FURI_HAL_I2C_CONFIG_POWER_I2C_TIMINGS_400 0x00602173
osMutexId_t furi_hal_i2c_bus_power_mutex = NULL;
static void furi_hal_i2c_bus_power_event(FuriHalI2cBus* bus, FuriHalI2cBusEvent event) {
if(event == FuriHalI2cBusEventInit) {
furi_hal_i2c_bus_power_mutex = osMutexNew(NULL);
FURI_CRITICAL_ENTER();
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
LL_RCC_SetI2CClockSource(LL_RCC_I2C1_CLKSOURCE_PCLK1);
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
FURI_CRITICAL_EXIT();
bus->current_handle = NULL;
} else if(event == FuriHalI2cBusEventDeinit) {
osMutexDelete(furi_hal_i2c_bus_power_mutex);
} else if(event == FuriHalI2cBusEventLock) {
furi_check(osMutexAcquire(furi_hal_i2c_bus_power_mutex, osWaitForever) == osOK);
} else if(event == FuriHalI2cBusEventUnlock) {
furi_check(osMutexRelease(furi_hal_i2c_bus_power_mutex) == osOK);
} else if(event == FuriHalI2cBusEventActivate) {
FURI_CRITICAL_ENTER();
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
FURI_CRITICAL_EXIT();
} else if(event == FuriHalI2cBusEventDeactivate) {
FURI_CRITICAL_ENTER();
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
FURI_CRITICAL_EXIT();
}
}
FuriHalI2cBus furi_hal_i2c_bus_power = {
.i2c = I2C1,
.callback = furi_hal_i2c_bus_power_event,
};
osMutexId_t furi_hal_i2c_bus_external_mutex = NULL;
static void furi_hal_i2c_bus_external_event(FuriHalI2cBus* bus, FuriHalI2cBusEvent event) {
if(event == FuriHalI2cBusEventActivate) {
FURI_CRITICAL_ENTER();
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C3);
LL_RCC_SetI2CClockSource(LL_RCC_I2C3_CLKSOURCE_PCLK1);
LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);
FURI_CRITICAL_EXIT();
} else if(event == FuriHalI2cBusEventDeactivate) {
FURI_CRITICAL_ENTER();
LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);
FURI_CRITICAL_EXIT();
}
}
FuriHalI2cBus furi_hal_i2c_bus_external = {
.i2c = I2C3,
.callback = furi_hal_i2c_bus_external_event,
};
void furi_hal_i2c_bus_handle_power_event(
FuriHalI2cBusHandle* handle,
FuriHalI2cBusHandleEvent event) {
if(event == FuriHalI2cBusHandleEventActivate) {
hal_gpio_init_ex(
&gpio_i2c_power_sda,
GpioModeAltFunctionOpenDrain,
GpioPullNo,
GpioSpeedLow,
GpioAltFn4I2C1);
hal_gpio_init_ex(
&gpio_i2c_power_scl,
GpioModeAltFunctionOpenDrain,
GpioPullNo,
GpioSpeedLow,
GpioAltFn4I2C1);
LL_I2C_InitTypeDef I2C_InitStruct = {0};
I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
I2C_InitStruct.DigitalFilter = 0;
I2C_InitStruct.OwnAddress1 = 0;
I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
if(furi_hal_version_get_hw_version() > 10) {
I2C_InitStruct.Timing = FURI_HAL_I2C_CONFIG_POWER_I2C_TIMINGS_400;
} else {
I2C_InitStruct.Timing = FURI_HAL_I2C_CONFIG_POWER_I2C_TIMINGS_100;
}
LL_I2C_Init(handle->bus->i2c, &I2C_InitStruct);
// I2C is enabled at this point
LL_I2C_EnableAutoEndMode(handle->bus->i2c);
LL_I2C_SetOwnAddress2(handle->bus->i2c, 0, LL_I2C_OWNADDRESS2_NOMASK);
LL_I2C_DisableOwnAddress2(handle->bus->i2c);
LL_I2C_DisableGeneralCall(handle->bus->i2c);
LL_I2C_EnableClockStretching(handle->bus->i2c);
} else if(event == FuriHalI2cBusHandleEventDeactivate) {
LL_I2C_Disable(handle->bus->i2c);
hal_gpio_write(&gpio_i2c_power_sda, 1);
hal_gpio_write(&gpio_i2c_power_scl, 1);
hal_gpio_init_ex(
&gpio_i2c_power_sda, GpioModeAnalog, GpioPullNo, GpioSpeedLow, GpioAltFnUnused);
hal_gpio_init_ex(
&gpio_i2c_power_scl, GpioModeAnalog, GpioPullNo, GpioSpeedLow, GpioAltFnUnused);
}
}
FuriHalI2cBusHandle furi_hal_i2c_handle_power = {
.bus = &furi_hal_i2c_bus_power,
.callback = furi_hal_i2c_bus_handle_power_event,
};
void furi_hal_i2c_bus_handle_external_event(
FuriHalI2cBusHandle* handle,
FuriHalI2cBusHandleEvent event) {
if(event == FuriHalI2cBusHandleEventActivate) {
hal_gpio_init_ex(
&gpio_ext_pc0, GpioModeAltFunctionOpenDrain, GpioPullNo, GpioSpeedLow, GpioAltFn4I2C3);
hal_gpio_init_ex(
&gpio_ext_pc1, GpioModeAltFunctionOpenDrain, GpioPullNo, GpioSpeedLow, GpioAltFn4I2C3);
LL_I2C_InitTypeDef I2C_InitStruct = {0};
I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
I2C_InitStruct.DigitalFilter = 0;
I2C_InitStruct.OwnAddress1 = 0;
I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
I2C_InitStruct.Timing = FURI_HAL_I2C_CONFIG_POWER_I2C_TIMINGS_100;
LL_I2C_Init(handle->bus->i2c, &I2C_InitStruct);
// I2C is enabled at this point
LL_I2C_EnableAutoEndMode(handle->bus->i2c);
LL_I2C_SetOwnAddress2(handle->bus->i2c, 0, LL_I2C_OWNADDRESS2_NOMASK);
LL_I2C_DisableOwnAddress2(handle->bus->i2c);
LL_I2C_DisableGeneralCall(handle->bus->i2c);
LL_I2C_EnableClockStretching(handle->bus->i2c);
} else if(event == FuriHalI2cBusHandleEventDeactivate) {
LL_I2C_Disable(handle->bus->i2c);
hal_gpio_write(&gpio_ext_pc0, 1);
hal_gpio_write(&gpio_ext_pc1, 1);
hal_gpio_init_ex(&gpio_ext_pc0, GpioModeAnalog, GpioPullNo, GpioSpeedLow, GpioAltFnUnused);
hal_gpio_init_ex(&gpio_ext_pc1, GpioModeAnalog, GpioPullNo, GpioSpeedLow, GpioAltFnUnused);
}
}
FuriHalI2cBusHandle furi_hal_i2c_handle_external = {
.bus = &furi_hal_i2c_bus_external,
.callback = furi_hal_i2c_bus_handle_external_event,
};
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