static void _i2cTask(void *parameters)
{
while(1){
struct _i2cMessage message;
xQueueReceive(_rxTxQueue, &message, portMAX_DELAY); // get data to send
xSemaphoreTake(_i2cHrdSemaphore, portMAX_DELAY); // wait for DMA to be free, useful think for a future
if(message.rxFlag){
_i2cRead(&message);
}else{
_i2cWrite(&message);
}
xSemaphoreGive(_i2cHrdSemaphore);
vTaskDelay(1/portTICK_RATE_MS); //Then go sleep
}
}
enum Error i2cReadFromSlaveT(uint16_t addr, char *string, uint8_t lenght, portTickType ticks_to_wait)
{
struct _i2cMessage message;
//lets initialize new message
message.length = lenght;
message.addr=addr;
message.rxFlag=RX_FLAG;
message.sendMessTaskHandle=xTaskGetCurrentTaskHandle();
message.string=string;
enum Error error;
if (message.length == 0)
return ERROR_NONE;
if(message.sendMessTaskHandle != NULL){
portBASE_TYPE ret = xQueueSend(_rxTxQueue, &message, ticks_to_wait);//add new message to a RXTX queue
error = errorConvert_portBASE_TYPE(ret);
vTaskSuspend(NULL);//a task which is reading something from I2C slave need to wait for an answer
}
else{ //in case it would be call not from a task
_i2cRead(&message);
}
return error;
}
// i2cReadRegister - Reads the specified amount of data from the given register address on
// the specified I2C address
bool i2cReadRegister(uint8_t addr, uint8_t reg, uint8_t *value, uint16_t count) {
i2cState.status |= I2C_STATUS_NOSTOP;
// Write out the location we want and read in data
return _i2cWrite(addr, ®, 1) && _i2cRead(addr, value, count);
}
// i2cRead - Reads the specified number of data bytes from the specified address
bool i2cRead(uint8_t addr, uint8_t *data, uint16_t count) {
return _i2cRead(addr, data, count);
}
