示例#1
0
static int
cyg_hal_plf_serial_control(channel_data_t *chan, __comm_control_cmd_t func, ...)
{
    Xuint16 opt;
    int ret = 0;

    led(1);

    if (!chan->dev_ok) return ret;

    switch (func) {
    case __COMMCTL_IRQ_ENABLE:
        opt = XUartNs550_GetOptions(&chan->dev) | XUN_OPTION_DATA_INTR;
        XUartNs550_SetOptions(&chan->dev, opt);
        HAL_INTERRUPT_UNMASK(chan->isr_vector);
        chan->int_state = 1;
        break;
    case __COMMCTL_IRQ_DISABLE:
        ret = chan->int_state;
        chan->int_state = 0;
        opt = XUartNs550_GetOptions(&chan->dev) & ~XUN_OPTION_DATA_INTR;
        XUartNs550_SetOptions(&chan->dev, opt);
        HAL_INTERRUPT_MASK(chan->isr_vector);        
        break;
    case __COMMCTL_DBG_ISR_VECTOR:
        ret = chan->isr_vector;
        break;
    case __COMMCTL_SET_TIMEOUT:
    {
        va_list ap;

        va_start(ap, func);

        ret = chan->msec_timeout;
        chan->msec_timeout = va_arg(ap, cyg_uint32);

        va_end(ap);
    }        
    default:
        break;
    }
    return ret;
}
/**
*
* This function does a minimal test on the UART 16450/550 device and driver as a
* design example.  The purpose of this function is to illustrate how to use
* the XUartNs550 component.
*
* This function sends data and expects to receive the data thru the UART
* using the local loopback mode of the UART hardware.
*
* This function polls the UART and does not require the use of interrupts.
*
* @param	DeviceId is the XPAR_<uartns550_instance>_DEVICE_ID value from
*		xparameters.h.
*
* @return	XST_SUCCESS if successful, XST_FAILURE if unsuccessful.
*
* @note		This function polls the UART such that it may be not return
*		if the hardware is not working correctly.
*
****************************************************************************/
int UartNs550PolledExample(u16 DeviceId)
{
	int Status;
	unsigned int SentCount;
	unsigned int ReceivedCount = 0;
	u16 Index;
	u16 Options;

	/*
	 * Initialize the UART Lite driver so that it's ready to use,
	 * specify the device ID that is generated in xparameters.h
	 */
	Status = XUartNs550_Initialize(&UartNs550, DeviceId);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}

	/*
	 * Perform a self-test to ensure that the hardware was built  correctly
	 */
	Status = XUartNs550_SelfTest(&UartNs550);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}

	/*
	 * Enable the local loopback so data that is sent will be received,
	 * and keep the FIFOs enabled
	 */
	Options = XUN_OPTION_LOOPBACK | XUN_OPTION_FIFOS_ENABLE;
	XUartNs550_SetOptions(&UartNs550, Options);

	/*
	 * Initialize the send buffer bytes with a pattern to send and the
	 * the receive buffer bytes to zero
	 */
	for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
		SendBuffer[Index] = '0' + Index;
		RecvBuffer[Index] = 0;
	}

	/*
	 * Send the buffer thru the UART waiting till the data can be
	 * sent (block), if the specified number of bytes was not sent
	 * successfully, then an error occurred
	 */
	SentCount = XUartNs550_Send(&UartNs550, SendBuffer, TEST_BUFFER_SIZE);
	if (SentCount != TEST_BUFFER_SIZE) {
		return XST_FAILURE;
	}

	/*
	 * Receive the number of bytes which is transfered.
	 * Data may be received in fifo with some delay hence we continuously
	 * check the receive fifo for valid data and update the receive buffer
	 * accordingly.
	 */
	while (1) {
	   ReceivedCount += XUartNs550_Recv(&UartNs550,
					   RecvBuffer + ReceivedCount,
					   TEST_BUFFER_SIZE - ReceivedCount);
	   if (ReceivedCount == TEST_BUFFER_SIZE)
	   {
		break;
           }
        }

	/*
	 * Check the receive buffer data against the send buffer and verify the
	 * data was correctly received
	 */
	for (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
		if (SendBuffer[Index] != RecvBuffer[Index]) {
			return XST_FAILURE;
		}
	}

	/*
	 * Clean up the options
	 */
	Options = XUartNs550_GetOptions(&UartNs550);
	Options = Options & ~(XUN_OPTION_LOOPBACK | XUN_OPTION_FIFOS_ENABLE);
	XUartNs550_SetOptions(&UartNs550, Options);

	return XST_SUCCESS;
}