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CCS/LAUNCHXL-CC26X2R1: how can we get the number of bytes when the UART work in read callback mode

nan li44
Expert 2025 points
Part Number: LAUNCHXL-CC26X2R1

Tool/software: Code Composer Studio

Hi,

we set the uart in read callback mode to receive random length(< 128)data, it call uart_read(uart1_handle,rxbuffer,128) every 100ms.

it goto callback function normally, but how to get the number of bytes when it step into the callback ?

Thanks,

LN

  • 0
    TI__Genius 9215 points

    Hi LN,

    The number of bytes is the third parameter in your callback function:

    /*!
 *  @brief      The definition of a callback function used by the UART driver
 *              when used in #UART_MODE_CALLBACK
 *              The callback can occur in task or HWI context.
 *
 *  @param      UART_Handle             UART_Handle
 *
 *  @param      buf                     Pointer to read/write buffer
 *
 *  @param      count                   Number of elements read/written
 */
typedef void (*UART_Callback) (UART_Handle handle, void *buf, size_t count);

    Best Regards,

    R.M

  • 0 in reply to R.M
    Expert 2025 points

    Hi R.M,

    Thank you, it works.

    LN