Exemple #1
0
bool uart_sps_flow_off(void)
{
    bool flow_off = true;

    do
    {
        // First check if no transmission is ongoing
        if ((uart_temt_getf() == 0) || (uart_thre_getf() == 0) || !uart_sps_is_rx_fifo_empty())
        {
            flow_off = false;
            break;
        }
        // Configure modem (HW flow control disable, 'RTS flow off')
        SetWord32(UART_MCR_REG, GetWord32(UART_MCR_REG) & (~UART_RTS)); 
        //SetWord32(UART_MCR_REG, 0);
        
        // Wait for 1 character duration to ensure host has not started a transmission at the
        // same time
        for (int i=0;i<UART_WAIT_BYTE_COUNTER;i++);

        // Check if data has been received during wait time
        if(!uart_sps_is_rx_fifo_empty())
        {
            // Re-enable UART flow
            uart_sps_flow_on();

            // We failed stopping the flow
            flow_off = false;
        }
    } while(false);
    
    
    return (flow_off);
}
Exemple #2
0
bool uart_sps_flow_off(void)
{
    bool flow_off = true;

    do
    {
        // First check if no transmission is ongoing
        if ((uart_temt_getf() == 0) || (uart_thre_getf() == 0))
        {
            flow_off = false;
            break;
        }

        // Configure modem (HW flow control disable, 'RTS flow off')
        // Wait for 1 character duration to ensure host has not started a transmission at the
        // same time
        #ifndef __GNUC__
//        timer_wait(UART_CHAR_DURATION);
        #endif //__GNUC__

        // Check if data has been received during wait time
        if(!uart_sps_is_rx_fifo_empty())
        {
            // Re-enable UART flow
            uart_sps_flow_on();

            // We failed stopping the flow
            flow_off = false;
        }
    } while(false);

    return (flow_off);
}