flipperzero-firmware/bootloader/targets/f7/furi_hal/furi_hal_i2c.c

137 lines
3.3 KiB
C
Raw Normal View History

#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 <assert.h>
void furi_hal_i2c_init() {
furi_hal_i2c_bus_power.callback(&furi_hal_i2c_bus_power, FuriHalI2cBusEventInit);
}
void furi_hal_i2c_acquire(FuriHalI2cBusHandle* handle) {
handle->bus->callback(handle->bus, FuriHalI2cBusEventLock);
assert(handle->bus->current_handle == NULL);
handle->bus->current_handle = handle;
handle->bus->callback(handle->bus, FuriHalI2cBusEventActivate);
handle->callback(handle, FuriHalI2cBusHandleEventActivate);
}
void furi_hal_i2c_release(FuriHalI2cBusHandle* handle) {
assert(handle->bus->current_handle == handle);
handle->callback(handle, FuriHalI2cBusHandleEventDeactivate);
handle->bus->callback(handle->bus, FuriHalI2cBusEventDeactivate);
handle->bus->current_handle = NULL;
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) {
assert(handle->bus->current_handle == handle);
uint32_t time_left = timeout;
bool ret = true;
while(LL_I2C_IsActiveFlag_BUSY(handle->bus->i2c))
;
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--;
time_left = timeout;
}
if(LL_SYSTICK_IsActiveCounterFlag()) {
if(--time_left == 0) {
ret = false;
break;
}
}
}
LL_I2C_ClearFlag_STOP(handle->bus->i2c);
return ret;
}
bool furi_hal_i2c_rx(
FuriHalI2cBusHandle* handle,
uint8_t address,
uint8_t* data,
uint8_t size,
uint32_t timeout) {
assert(handle->bus->current_handle == handle);
uint32_t time_left = timeout;
bool ret = true;
while(LL_I2C_IsActiveFlag_BUSY(handle->bus->i2c))
;
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--;
time_left = timeout;
}
if(LL_SYSTICK_IsActiveCounterFlag()) {
if(--time_left == 0) {
ret = false;
break;
}
}
}
LL_I2C_ClearFlag_STOP(handle->bus->i2c);
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;
}
}