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RM48L952: How to abort SCI operation

Jan Scharnweber
Prodigy 210 points
Part Number: RM48L952
Other Parts Discussed in Thread: HALCOGEN

When using the halcogen functions for receiving and sending bytes via sci all function are waiting for RX/TX -Ready- Interrupts. What is the correct way to abort a running receive/send operation.

Regards

Jan Scharnweber

  • 0
    TI__Guru 72500 points
    Can you be a bit more specific about what you are trying to do? There are functions for sending or receiving individual bytes. Do you need to abort a byte that is in the middle of being sent or received, or are you trying to abort out of a polling loop?
  • 0 in reply to Bob Crosby
    Prodigy 210 points
    Thank you for your reply!
    I am looking for a method to abort the function "void sciReceive(sciBASE_t *sci, uint32 length, uint8 * data)".

    Regards
    Jan Scharnweber
  • 0 in reply to Jan Scharnweber
    TI__Guru 72500 points
    If you are receiving an unknown number of bytes with a termination character, don't use sciReceive(). I suggest you use interrupts to receive the characters into a buffer checking each time if the character was the termination character. Once the termination character is received, set a flag so your main routine knows there is a new command (or data) to process. You can Ping-Pong between two receive buffers, or use a circular buffer.
  • 0 in reply to Bob Crosby
    Prodigy 210 points

    Actually i always know how many bytes to be received. But in certain situations i must be able to abort the current receive process and start with a new one.

    Thanks for the feedback

    Regards 

    Jan Scharnweber

  • 0 in reply to Jan Scharnweber
    TI__Guru 72500 points
    Then I suggest you write your own sciReceive() function which checks for this certain situation within the while statement. You can model it after the function in sci.c. You can make it return the number of characters received (instead of being a void function) so that your program can check if all characters were received or not.