enum Error i2cWriteToSlaveT(uint16_t addr, const char *string, uint8_t lenght, portTickType ticks_to_wait)
{
struct _i2cMessage message;
message.length = lenght;
message.addr=addr;
message.rxFlag=TX_FLAG;
message.sendMessTaskHandle=xTaskGetCurrentTaskHandle();
if (message.length == 0)
return ERROR_NONE;
if (string >= __ram_start) // is the string in RAM?
{
message.string = (char*) pvPortMalloc(message.length);
if (message.string == NULL)
return ERROR_FreeRTOS_errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY;
memcpy(message.string, string, message.length);
} else
message.string = (char*) string;// no, string in ROM - just use the address
enum Error error;
if(message.sendMessTaskHandle != NULL){
portBASE_TYPE ret = xQueueSend(_rxTxQueue, &message, ticks_to_wait);
error = errorConvert_portBASE_TYPE(ret);
}
else{
_i2cWrite(&message);
}
return error;
}
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
}
}
// i2cWrite - Writes the specified number of data bytes to the specified address
bool i2cWrite(uint8_t addr, uint8_t *data, uint16_t count) {
i2cState.status &= ~I2C_STATUS_NOSTOP;
return _i2cWrite(addr, data, count);
}
// 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);
}