Uart Callback function only getting two bytes

Hi Cory 

Check the size of your RX buffer. The interrupt triggers when it is full.

Hi Lou,

Currently I'm not using the uart_read function. Just relying on the callback itself. Modifying the stock example, the size is uint8_t g_out_of_band[10];. It triggers twice filling the first two array indexes when I'm sending a value of "hello". So I end up with 2 values h and e.

Hi Cory,

Could you please share the callback function of your project for us to get more information.

void uart1_callback(uart_callback_args_t *p_args)  //uart event callback function prototype
{
   fsp_err_t err = FSP_SUCCESS;
    g_uart_event = p_args->event;
    /* Handle the UART event */
    switch (p_args->event)
    {
        /* Received a character */
        case UART_EVENT_RX_CHAR:
        {

            /* Only put the next character in the receive buffer if there is space for it */
            if (sizeof(g_out_of_band_received) > g_out_of_band_index)
            {
                /* Write either the next one or two bytes depending on the receive data size */
                if (UART_DATA_BITS_8 >= g_uart0_cfg.data_bits)
                {
                    g_out_of_band_received[g_out_of_band_index++] = (uint8_t) p_args->data;

                }
                else
                {
                    uint16_t *p_dest = (uint16_t*) &g_out_of_band_received[g_out_of_band_index];
                    *p_dest = (uint16_t) p_args->data;
                    g_out_of_band_index += 2;
                }
            }

            break;
        }
            /* Receive complete */
        case UART_EVENT_RX_COMPLETE:
        {
            g_receive_complete = 1;
            break;
        }
            /* Transmit complete */
        case UART_EVENT_TX_COMPLETE:
        {
            g_transfer_complete = 1;
            break;
        }
        default:
        {

        }
    }

How do I get this call_back function to read more than bytes? I am using RTOS and not sure if this has anything to do with my issue.

void uart1_callback(uart_callback_args_t *p_args)  //uart event callback function prototype
{
   fsp_err_t err = FSP_SUCCESS;
    g_uart_event = p_args->event;
    /* Handle the UART event */
    switch (p_args->event)
    {
        /* Received a character */
        case UART_EVENT_RX_CHAR:
        {

            /* Only put the next character in the receive buffer if there is space for it */
            if (sizeof(g_out_of_band_received) > g_out_of_band_index)
            {
                /* Write either the next one or two bytes depending on the receive data size */
                if (UART_DATA_BITS_8 >= g_uart0_cfg.data_bits)
                {
                    g_out_of_band_received[g_out_of_band_index++] = (uint8_t) p_args->data;

                }
                else
                {
                    uint16_t *p_dest = (uint16_t*) &g_out_of_band_received[g_out_of_band_index];
                    *p_dest = (uint16_t) p_args->data;
                    g_out_of_band_index += 2;
                }
            }

            break;
        }
            /* Receive complete */
        case UART_EVENT_RX_COMPLETE:
        {
            g_receive_complete = 1;
            break;
        }
            /* Transmit complete */
        case UART_EVENT_TX_COMPLETE:
        {
            g_transfer_complete = 1;
            break;
        }
        default:
        {

        }
    }

How do I get this call_back function to read more than bytes? I am using RTOS and not sure if this has anything to do with my issue.