main.c

ARM9芯片AT91RM9200的串口测试程序

//*----------------------------------------------------------------------------
//*         ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : main.c
//* Object              : main application written in C
//* Creation            : ODi   06/26/2002
//*
//*----------------------------------------------------------------------------

#include <stdarg.h>

#include "AT91RM9200.h"
#include "lib_AT91RM9200.h"

// AT91F_DBGU_Printk is defined in init.c
extern void AT91F_DBGU_Printk(char *);

void AT91F_DBGU_Printf(char *fmt,...)
{
    va_list ap;
    char string[256];

    va_start(ap,fmt);
    vsprintf(string,fmt,ap);
    AT91F_DBGU_Printk(string);
    va_end(ap);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_DBGU_getc
//* \brief This function is used to receive a character to the DBGU channel
//*----------------------------------------------------------------------------
char AT91F_DBGU_Getc(void)
{
	while (!AT91F_US_RxReady((AT91PS_USART)AT91C_BASE_DBGU));
	return AT91F_US_GetChar((AT91PS_USART) AT91C_BASE_DBGU);
}


int main()
{
	unsigned int tick;
	int i, flag=0;

//* USART0 test

#if 1
	
	AT91F_DBGU_Printk("========USART0 ECHO TEST==========\n\r");
	AT91F_DBGU_Printk("Plug serial cable into COM2\n\r");
	AT91F_DBGU_Printk("\'q\' to quit\n\r");
	// Open PIO for USART0
	AT91F_US0_CfgPIO();
	AT91F_US0_CfgPMC();
	// Configure USART0 
	AT91F_US_Configure (
		AT91C_BASE_US0,            // USART2 base address
		60000000,                  // 60 MHz
		AT91C_US_ASYNC_MODE ,      // mode Register to be programmed
		115200,                    // baudrate to be programmed
		0);                        // timeguard to be programmed

	// Enable Transmitter & Receiver
	AT91F_US_EnableTx((AT91PS_USART) AT91C_BASE_US0);
	AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_US0);
	
	// USART0 echo 
	while(1)
	{
		char c;
		
		if(AT91F_US_RxReady(AT91C_BASE_US0))
		{
			if( (c = AT91F_US_GetChar(AT91C_BASE_US0)) != 'q')
				AT91F_US_PutChar(AT91C_BASE_US0, c);
			else 
				break;
		}
	}
	
#endif

#if 1	
	//* USART1 test
	AT91F_DBGU_Printk("========USART1 ECHO TEST==========\n\r");
	AT91F_DBGU_Printk("Plug serial cable into COM3\n\r");
	AT91F_DBGU_Printk("\'q\' to quit\n\r");
	// Open PIO for USART1
	AT91F_US1_CfgPIO();
	AT91F_US1_CfgPMC();
	// Configure USART0 
	AT91F_US_Configure (
		AT91C_BASE_US1,            // USART2 base address
		59904000,                  // 60 MHz
		AT91C_US_ASYNC_MODE ,      // mode Register to be programmed
		115200,                    // baudrate to be programmed
		0);                        // timeguard to be programmed

	// Enable Transmitter & Receiver
	AT91F_US_EnableTx((AT91PS_USART) AT91C_BASE_US1);
	AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_US1);

	// USART1 echo 
	i = 0;
	while(1)
	{
		char c;
		//char temp[1024];
		//int i = 0;
		
		if(AT91F_US_RxReady(AT91C_BASE_US1))
		{
			if( (c = AT91F_US_GetChar(AT91C_BASE_US1)) != 'q')
			{
				if(AT91F_US_TxReady(AT91C_BASE_US1))
					AT91F_US_PutChar(AT91C_BASE_US1, c);
				//AT91F_DBGU_Printk(&c);
				//temp[i++] = c;
			}
			else if(c == 0x89)
				AT91F_DBGU_Printk("error");
			else
				break;
		}
	}

#endif
	
	AT91F_DBGU_Printk("Test OK");
	
	while(1);
}