CCS/TMS570LC4357: Problem with receiving data from sci module using polling method

Sarthake,

Sarthake Choudhary said:

Does sciIsRxReady return value 1 when it receives one byte of data or when it receives data through serial monitor irrespective of the length of the data obtained??

uint32 sciIsRxReady(sciBASE_t *sci)
{
/* USER CODE BEGIN (13) */
/* USER CODE END */

    return sci->FLR & (uint32)SCI_RX_INT;
}

Through inspection of the code you will see it is only returning the value of the RX flag in the SCI flag register. A 1 indicates data is received. The SCI is only capable of receiving one byte at a time unless buffered mode is available (only in LIN modules used as SCI) but I do not think the Halcogen code accommodates buffered mode.

If you are manually entering the data in the terminal window that is sent to the Hercules device, there is no way you will be able to enter values at rate of 10ms each so that they are subsequently printed. My feeling is there are some logical issues with what you are attempting to program which sounds like a mirroring program where whatever is typed on the keyboard through the terminal window is then sent back out on the Tx pin to the terminal window. The caveat is you want to buffer 8 bytes then send out the data in 10ms intervals. If you could post either pseudo code or a flow chart of your code, you might see some logic that needs to be implemented to gate the Tx until all the bytes are received or to somehow identify that a new byte has been received and transmit the new byte.