main.c

at91rm9200 IrDA interface control源码

//*----------------------------------------------------------------------------
//*         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
//* Modification 31/03/03 JPP : add DBGU message
//*----------------------------------------------------------------------------
#include <string.h>
#include "AT91RM9200.h"
#include "lib_AT91RM9200.h"
#include "config.h"
#include "console.h"

//extern void AT91F_DBGU_Printk(char *);
#define	AT91F_DBGU_Printk	puts

void __irq irq_handler(void)	//added by hzh
{
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_IRDA_putc
//* \brief This function is used to send a character to the IRDA channel
//*----------------------------------------------------------------------------
void AT91F_IRDA_putc(
	char buffer) // \arg pointer to a character
{
	while (!AT91F_US_TxReady((AT91PS_USART)AT91C_BASE_US2));
	AT91F_US_PutChar(AT91C_BASE_US2,buffer);
	
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_IRDA_getc
//* \brief This function is used to receive a character to the IRDA channel
//*----------------------------------------------------------------------------
char AT91F_IRDA_getc()
{
	while (!AT91F_US_RxReady((AT91PS_USART)AT91C_BASE_US2));
	return AT91F_US_GetChar(AT91C_BASE_US2);
}

int main()
{
	char c;
	char IrdaMessage[] = "\
\n\n\r-I- ======================================\n\r\
-I- AT91RM3400 basic IRDA example\n\r\
-I- --------------------------------------\n\r\
-I- Hit characters, they will be echo-ed\n\r\
-I- ======================================\n\r";
	char DbguMessage[] = "\
\n\n\r-I- ======================================\n\r\
-I- AT91RM3400 basic IRDA example\n\r\
-I- --------------------------------------\n\r\
-I- Set IRDA Port at 9600,8,N \n\r\
-I- ======================================\n\r";


	AT91F_DBGU_Printk("main()\n\r");
	
	// Open PIO & PMC for USART2
	AT91F_US2_CfgPIO();
	AT91F_US2_CfgPMC();
	
	// Configure USART2 
	AT91F_US_Configure (
		AT91C_BASE_US2,            // USART2 base address
		AT91C_MASTER_CLOCK,        // 48 MHz
		AT91C_US_ASYNC_IRDA_MODE ,      // mode Register to be programmed
		115200 ,                     // baudrate to be programmed
		0);                       // timeguard to be programmed
	// Configure filter (!!!even in transmition mode!!!)
	AT91F_US_SetIrdaFilter(AT91C_BASE_US2, 30);
		
	// Disable pullup
	//AT91C_BASE_PIOA->PIO_PPUDR =AT91C_PA23_TXD2 | AT91C_PA22_RXD2;

	// ============= IRDA is HALF-DUPLEX: Transmition mode ================
	// Enable Transmition
	AT91F_US_DisableRx(AT91C_BASE_US2);
	AT91F_US_EnableTx(AT91C_BASE_US2);

	// Send a welcome message
	AT91F_PDC_SendFrame(
		(AT91PS_PDC) &(AT91C_BASE_DBGU->DBGU_RPR),
		DbguMessage, strlen(DbguMessage), 
		(char *) 0, 0);
	// Send a welcome message
	AT91F_PDC_SendFrame(
		(AT91PS_PDC) &(AT91C_BASE_US2->US_RPR),
		IrdaMessage, strlen(IrdaMessage), 
		(char *) 0, 0);
	// wait for the end of transmition
	while ( !(AT91C_BASE_US2->US_CSR & AT91C_US_TXEMPTY) );
	
	printf("Do you want to test transive or receive? [t/r]\n");
	while (1) {
		c = getch();		
		if((c=='t')||(c=='r')) {
			printf("%s test\n", (c=='t')?"transive":"receive");
			break;
		}
	}
	
	if (c=='t')	
	while (1) {
		c = getch();
		putch(c);
		
		// ============= IRDA is HALF-DUPLEX: Transmition mode ================
		// Enable Transmition
		AT91F_US_DisableRx(AT91C_BASE_US2);
		AT91F_US_EnableTx(AT91C_BASE_US2);
		AT91F_IRDA_putc(c);
		// wait for the end of transmition
		while ( !(AT91C_BASE_US2->US_CSR & AT91C_US_TXEMPTY) );		
		
	}
	else
	while (1) {
		// Receive and send 1 character using RHR & THR
		// ============= IRDA is HALF-DUPLEX: Reception mode ================
		// Enable reception
		AT91F_US_DisableTx(AT91C_BASE_US2);
		AT91F_US_EnableRx(AT91C_BASE_US2);
		c = AT91F_IRDA_getc();
		
		putch(c);
	}
	
	AT91F_US_EnableTx(AT91C_BASE_US2);
	AT91F_US_EnableRx(AT91C_BASE_US2);
	while (1) {
		c = getch();
		putch(c);
		AT91F_IRDA_putc(c);
		while ( !(AT91C_BASE_US2->US_CSR & AT91C_US_TXEMPTY) );
		putch(AT91F_IRDA_getc());
	}
}
//* EOF