testuart232_ce1.c

这是DM642的R232串口通信程序

/* ======================================================================== */
/* NAME                                                                     */
/*     uart_pc.c 										                    */
/* DESCRIPTION                                                              */
/*             UART module communication with PC for the jydVCM             */
/* ------------------------------------------------------------------------ */
/*         Copyright (c) 2006 Wintech Digital System Technology Corp.       */
/*                           All Rights Reserved.                           */
/* ======================================================================== */
//date:2006 9 15 
//auther:shangqr
/* ======================================================================== */
/* basic header includes                                                    */
/* ======================================================================== */

#include <stdio.h>
#include <std.h>
#include <sys.h>

#include "testuartcfg.h"
#include "DM643.h"
#include "DM643_uart.h"

void UART_PC();  



Int8 *buffer;

volatile Uint32 sleepCount = 0;
void sleepIsr()
{
    sleepCount++;
}

/***********************
baud rate can use:
#define DM643_UART_BAUD115200     0x010
#define DM643_UART_BAUD57600      0x020
#define DM643_UART_BAUD38400      0x030
#define DM643_UART_BAUD19200      0x060
#define DM643_UART_BAUD9600       0x0c0
#define DM643_UART_BAUD4800       0x180
#define DM643_UART_BAUD2400       0x300
#define DM643_UART_BAUD1200       0x600
*/
main()
{
    /* Call BSL init */
    DM643_init();
   
    /* call uart function */
    UART_PC( );
 
    /* Success */
    printf("\n*** All tests PASS ***\n");
    
    /* Disable interrupts */
    IRQ_globalDisable();

    /* Software breakpoint */
     asm(" .long 0x10000000");
}


/*****************************/
void UART_PC()  
{
    
    Int32 baudrate,delaytime,i;
    DM643_UART_Handle hUart;
    Int16 temp;   
    Int8 buffer0[1000];
	
  	DM643_UART_Config uartcfg = 
    {
        0x00,  // IER
        0x57,  // FCR - FIFO Mode, 16 character trigger level
        0x03,  // LCR - 8 bits, no parity, 1 stop
        0x00,   // MCR
    };
  
    delaytime = 1;
    
	//default bautrate;
	baudrate=0x9600; 
	
    // Open UART 
    hUart = DM643_UART_open(DM643_UART232,baudrate, &uartcfg);  // 	DM643_UART485
  	
  	// allocation a buffer for data which comes from uart
  	buffer = (Int8*)malloc(2*1024*sizeof(Int8));  	
 
    // change baudrate,paritybit,databit,stopbit;
    DM643_UART_setParameter(hUart,9600,0,8,1);     
  	
    //set S_RT TO LOW
    //*((Uint32 *)0x90030000) = 0x0000;
    for (i=0;i<6000;i++)
    {
     buffer0[i]=i;
     } 
    while(1)
    {
        //set S_RT TO LOW for 485 getchar from uart
		//*((Uint32 *)0x90030000) = 0x0000;		
	    //get data 
	    temp=DM643_UART_getChar(hUart,1000,buffer); //get data
	    
	    //set S_RT TO HIGH for 485 putchar to uart
	   // *((Uint32 *)0x90030000) = 0x1000;
	    //send data	    
	    DM643_UART_putChar(hUart,256,buffer0);//send data
	    		
		//wait 
		DM643_waitusec(1000);		
	
    }
    
}