uart.c

周立功的EASYARM2131的测试程序

#include "config.h"


uint8 i2c_rec_buf;
uint8 i2c_rec_new;

void __irq IRQ_UART0(void)
{
	uint8 i;
	if((U0IIR & 0x0F) == 0x04)
	{
	 	i2c_rec_new = 1;
	 	i2c_rec_buf = U0RBR;
	}
	i = U0IIR ;
	VICVectAddr = 0x00;
}

int8 UART0_Init(uint32 baud,UARTMODE set)
{
	uint32 bak;
	if((baud == 0) || (baud >115200)) return 0;
	if((set.datab < 5) || (set.datab > 8)) return 0;
	if((set.stopb == 0) || (set.stopb >2)) return 0;
	if(set.parity >4) return 0;
	U0LCR = 0x80;
	bak = (Fpclk >> 4) / baud ; 
	U0DLM = bak >> 8;
	U0DLL = bak & 0xFF;
	bak = set.datab - 5;
	if(set.stopb == 2) bak |= 0x04;
	if(set.parity != 0)
	{
	 	set.parity = set.parity - 1;
	 	bak |= 0x08;
	}
	
	bak |= set.parity << 4 ;
	U0LCR =bak;
	
	PINSEL0 = (PINSEL0 & 0xFFFFFFF0) | 0x00000005;
	U0FCR = 0x01;
	U0IER =0x01;
	VICIntSelect = 0x00000000;
	VICVectCntl6 = 0x20 | 0x06 ;
	
	VICVectAddr6 = (uint32) IRQ_UART0;
	VICIntEnable = 1<<0x06;
	
	return (1);
	
}

void UART0_SendByte(uint8 dat)
{
	U0THR = dat ;
	while((U0LSR & 0x40) == 0) ;
}

void UART0_SendBuf(void)
{
/* uint8 i;

 UART0_SendByte(rec_buf) ;

 while((U0LSR & 0x20) == 0) ;*/
}