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#include <furi_hal_i2c.h>
#include <furi_hal_version.h>
#include <stm32wbxx_ll_i2c.h>
#include <stm32wbxx_ll_gpio.h>
#include <stm32wbxx_ll_cortex.h>
#include <furi.h>
#define TAG "FuriHalI2C"
void furi_hal_i2c_init() {
furi_hal_i2c_bus_power.callback(&furi_hal_i2c_bus_power, FuriHalI2cBusEventInit);
furi_hal_i2c_bus_external.callback(&furi_hal_i2c_bus_external, FuriHalI2cBusEventInit);
FURI_LOG_I(TAG, "Init OK");
}
void furi_hal_i2c_acquire(FuriHalI2cBusHandle* handle) {
// Lock bus access
handle->bus->callback(handle->bus, FuriHalI2cBusEventLock);
// Ensuree that no active handle set
furi_check(handle->bus->current_handle == NULL);
// Set current handle
handle->bus->current_handle = handle;
// Activate bus
handle->bus->callback(handle->bus, FuriHalI2cBusEventActivate);
// Activate handle
handle->callback(handle, FuriHalI2cBusHandleEventActivate);
}
void furi_hal_i2c_release(FuriHalI2cBusHandle* handle) {
// Ensure that current handle is our handle
furi_check(handle->bus->current_handle == handle);
// Deactivate handle
handle->callback(handle, FuriHalI2cBusHandleEventDeactivate);
// Deactivate bus
handle->bus->callback(handle->bus, FuriHalI2cBusEventDeactivate);
// Reset current handle
handle->bus->current_handle = NULL;
// Unlock bus
handle->bus->callback(handle->bus, FuriHalI2cBusEventUnlock);
}
bool furi_hal_i2c_tx(
FuriHalI2cBusHandle* handle,
uint8_t address,
const uint8_t* data,
uint8_t size,
uint32_t timeout) {
furi_check(handle->bus->current_handle == handle);
furi_assert(timeout > 0);
bool ret = true;
uint32_t timeout_tick = HAL_GetTick() + timeout;
do {
while(LL_I2C_IsActiveFlag_BUSY(handle->bus->i2c)) {
if(HAL_GetTick() >= timeout_tick) {
ret = false;
break;
}
}
if(!ret) {
break;
}
LL_I2C_HandleTransfer(
handle->bus->i2c,
address,
LL_I2C_ADDRSLAVE_7BIT,
size,
LL_I2C_MODE_AUTOEND,
LL_I2C_GENERATE_START_WRITE);
while(!LL_I2C_IsActiveFlag_STOP(handle->bus->i2c) || size > 0) {
if(LL_I2C_IsActiveFlag_TXIS(handle->bus->i2c)) {
LL_I2C_TransmitData8(handle->bus->i2c, (*data));
data++;
size--;
}
if(HAL_GetTick() >= timeout_tick) {
ret = false;
break;
}
}
LL_I2C_ClearFlag_STOP(handle->bus->i2c);
} while(0);
return ret;
}
bool furi_hal_i2c_rx(
FuriHalI2cBusHandle* handle,
uint8_t address,
uint8_t* data,
uint8_t size,
uint32_t timeout) {
furi_check(handle->bus->current_handle == handle);
furi_assert(timeout > 0);
bool ret = true;
uint32_t timeout_tick = HAL_GetTick() + timeout;
do {
while(LL_I2C_IsActiveFlag_BUSY(handle->bus->i2c)) {
if(HAL_GetTick() >= timeout_tick) {
ret = false;
break;
}
}
if(!ret) {
break;
}
LL_I2C_HandleTransfer(
handle->bus->i2c,
address,
LL_I2C_ADDRSLAVE_7BIT,
size,
LL_I2C_MODE_AUTOEND,
LL_I2C_GENERATE_START_READ);
while(!LL_I2C_IsActiveFlag_STOP(handle->bus->i2c) || size > 0) {
if(LL_I2C_IsActiveFlag_RXNE(handle->bus->i2c)) {
*data = LL_I2C_ReceiveData8(handle->bus->i2c);
data++;
size--;
}
if(HAL_GetTick() >= timeout_tick) {
ret = false;
break;
}
}
LL_I2C_ClearFlag_STOP(handle->bus->i2c);
} while(0);
return ret;
}
bool furi_hal_i2c_trx(
FuriHalI2cBusHandle* handle,
uint8_t address,
const uint8_t* tx_data,
uint8_t tx_size,
uint8_t* rx_data,
uint8_t rx_size,
uint32_t timeout) {
if(furi_hal_i2c_tx(handle, address, tx_data, tx_size, timeout) &&
furi_hal_i2c_rx(handle, address, rx_data, rx_size, timeout)) {
return true;
} else {
return false;
}
}
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