seed_dvs_uart.c

TI的DM6446的硬件平台搭建的相关例子

/*
 *  Copyright 2006 by Spectrum Digital Incorporated.
 *  All rights reserved. Property of Spectrum Digital Incorporated.
 */

/*
 *  UART Test
 *
 */

#include "seed_dvs6446_uart.h"


Uint16 tech;
/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  uart_test( )                                                            *
 *      Simple UART loopback test.                                          *
 *      Will write then read back the byte sent to the RS232 connector.     *
 *                                                                          *
 * ------------------------------------------------------------------------ */
Int16 uart_test()
{
    Int16 i, errors = 0;
    UART_HANDLE uart0;

    Int32 timeout = 0;
    Int32 test_timeout = 0x100000;

    /* Open Uart Handle */
    uart0 =DVS6446_UART_open( 1, 115200 );

    if ( uart0 == ( UART_HANDLE )-1 )
        return 1;

    /* Setup buffers */
    for ( i = 0 ; i < 0x100 ; i++ )
    {
        tx[i] = 0;
        rx[i] = 'a'+i;
    }

    /* UART Test */
	DAVINCIEVM_GPIO_setOutput(28,0);//here added by phoenix for uart1 2007/11/01
    _wait(1000);
    for ( i = 0 ; i < 0x100 ; i++ )
    {


       timeout = test_timeout;

        while( DVS6446_UART_rcvReady( uart0 ) )   // Wait for Rx ready
        {
            if ( timeout-- < 0 )
                return -1;
        }

        DVS6446_UART_getChar( uart0, &tx[i] );    // Read 1 byte
    }


	UART1_IIR=0xC0;

	 for ( i = 0 ; i < 0x100 ; i++ )
    {

 
    
		DAVINCIEVM_GPIO_setOutput(28,1);//here added by phoenix for uart1 2007/11/01
       	_wait(1000);
       	while( DVS6446_UART_xmtReady( uart0 ) )   // Wait for TX ready
        {
            if ( timeout-- < 0 )
                return -2;
        }

        DVS6446_UART_putChar( uart0, tx[i] );     // Write 1 byte
    }

    

    return errors;
}