uart.c

2410bios 实现简单功能 裸板传输 跑马灯 定时器

#include "2410addr.h"
#include "2410lib.h"

int i=0;

/*****************************************
轮询 - not fifo
*****************************************/

/*void uart_init()
{
	rULCON1 =3;		//设置每桢长度
	
	rUCON1 =0x25;	
	DisableIrq(BIT_UART1);	//设置非中断模式,接收
	
	rUBRDIV1 =0x19;	//设置波特率
}

void in_out()
{	
	while(1)
	{
		while(rUTRSTAT1 & 1 == 0);  //有错误---没有设置成回环模式
		printf("%d\n",rURXH1);
		Delay(1000);
	}
}*/


/*****************************************
中断 - not fifo
*****************************************/
/*
void uart_init()
{	
	rULCON1 =0x3;		//设置每桢长度
	rUCON1 =0x25;	//设置回环,中断模式
	rUBRDIV1 =0x19;	//设置波特率	

	EnableIrq(BIT_UART1);	//打开中断
	EnableSubIrq(BIT_SUB_ERR1 | BIT_SUB_TXD1 | BIT_SUB_RXD1);
	rUTXH1 =0;
}

void __irq in_out()
{

	while(rUTRSTAT1 & 2 == 0)
   		;
	rUTXH1 =i++;
	Delay(20);
	if(rSUBSRCPND & BIT_SUB_TXD1)
	{
		printf("%d\n",rURXH1);
		Delay(1000);
	}
	ClearPending(BIT_UART1);
	ClearSubPending(BIT_SUB_ERR1 | BIT_SUB_TXD1 | BIT_SUB_RXD1);
	DisableIrq(BIT_UART1);
	DisableSubIrq(BIT_SUB_ERR1 | BIT_SUB_TXD1 | BIT_SUB_RXD1);
}
*/

/*******************************************
中断，fifo
*******************************************/

void uart_init()
{	
	rULCON1 =0x3;		//设置每桢长度
	rUCON1 =0x25;	//设置回环,中断模式
	rUBRDIV1 =0x19;	//设置波特率	

	EnableIrq(BIT_UART1);	//打开中断
	EnableSubIrq(BIT_SUB_ERR1 | BIT_SUB_TXD1 | BIT_SUB_RXD1);
	
	rUFCON1 =0x1;
}

void __irq in_out()
{
	static int i =1;
    while( rUFSTAT1 & 0xF )
	   		;
	if(rUFSTAT1 & (1<<9) == 0)
	{
		rUTXH1 =i++;
	}
	ClearSubPending(BIT_SUB_TXD1);
	   	
	Delay(100);
	
	if(rUFSTAT1 & 0xf)
	{
		printf("%d\n",rURXH1);
		Delay(500);
	}
	ClearPending(BIT_UART1);
	ClearSubPending(BIT_SUB_ERR1 | BIT_SUB_RXD1);
}