serial.c

来自「ucosii c源码」· C语言 代码 · 共 85 行

#ifdef OS_MASTER_FILE
#include "includes.h"
#endif

#include <serial.h>

unsigned char TxBuff[LenTxBuff],RxBuff[LenRxBuff];
unsigned int inTxBuf,outTxBuf,inRxBuf,outRxBuf;
bit	TIflag=1;

void InitSerial()reentrant
{
	TMOD=TMOD&0X0F;
	TMOD=TMOD|0X20;
	THI=0XFD;
	SCON=0X50;,
	PCON=0X00;
	TR1=1;
}

void InitSerialBuffer(void)reentrant
{
	inTxBuf=outTxBuf=0;
	inRxBuf=outRxBuf=0;
	ES=1;
}

void serial(void)reentrant
{
	if(TI)
	{
		TI=0;
		if(inTxBuf==outTxBuf)
		{
			TIflag=1;
			return;
		}
		SBUF=TxBuf[outTxBuf];
		outTxBuf=(outTxBuf+1)%LenTxBuf;
	}
	if(RI)
	{
		RI=0;
		inRxBuf=(inRxBuf+1)%LenTxBuf;
		if(inRxBuf==outRxBuf)
			return;
		RxBuf[inRxBuf]=SBUF;
	}
}

void PrintChar(unsigned char ch)reentrant
{
	if(TIflag)
	{
		TIflag=0;
		TI=1;
	}
	inTxBuf=(inTxBuf+1)%LenTxBuf;
	if(inTxBuf==outTxBuf)
		return;
	TxBuf[inTxBuf]=ch;
}

void PrintStr(unsigned char *str)reentrant
{
	int i;
	unsigned char ch;
	
	OS_ENTER_CRITICAL();
	for(i=0;i<MaxLenStr;i++)
	{
		ch=*(str+i);
		if(ch=='\0')
			break;
		else if(ch=='\n')
		{
			PrintChar('\n');
			PrintChar('\r');
		}
		else
			PrintChar(ch);
	}
	OS_EXIT_CRITICAL();
}