//UART0.c
//uart0 相關程序

#include "mytype.h"
#include "config.h"
#include<ds89c4xx.h>

//extern uint8 xdata *pt;
//uint8 sending;
uint8 code HexTable[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

void UartInit0(void)    //8位數據位，1位停止位，無校驗，波特率uartbuadrate
{
	//EA = 0;
	TMOD &= 0x0F;
 	TMOD |= 0x20;    //定時器1工作在模式2
	SCON0 = 0x50;	//串口工作在方式1
	PCON |= 0x80;	//smod = 1;
	TH1 = 256 - ((fosc/12)/16)/uart0baudrate;	//根據波特率計算定時器初值
	TL1 = 256 - ((fosc/12)/16)/uart0baudrate;
	ES0=0;         //串行中斷允許=0
 	TR1=1;        //啟動定時器1
	TI_0 = 0;	//
	RI_0 = 0;
 	REN_0=1;        //允許接收 
	//IP1 = 0x50;	
	//IP0 = 0x40;	//PORT1優先級3，PORT0優先級2
 	//EA=1;         //允許中斷   
}

void PutChar0(uint8 send)	//發送一個字節的數據
{
	SBUF0 = send;
	while(0 == TI_0)	;
	TI_0 = 0;	//TI_0 = 1，發送完成，再清0
}

void PutString0(uint8 *psend, uint8 idata length)	//發送字符串，以字符串長度或'\0'結束
{
	while(length--)
	{
		PutChar0(*psend);
		psend++;
		if(*psend == '\0')
			return;
	}
}

void PutUint320(uint32 idata send,uint8 idata shuzhi)	//將32位的無符號數通過UART發送
{
	uint8 idata buffer[10];
	int8 idata i;
	for(i=9;i>=0;i--)
	{
		buffer[i] = send%shuzhi + '0';	//轉換成ASCII碼
		send = send/shuzhi;
	}
	for(i=0;i<=9;i++)
	{
		if(buffer[i] != '0')
			break;
	}
	if(10 == i)
		i = 9;		//如果傳入為0，則至少顯示一個0
	for( ;i<=9;i++)
	{
		PutChar0(buffer[i]);
	}
}

void PutHex0(uint8 idata send)	//將8位無符號數轉換成16進制后發送
{
	PutChar0('0');
	PutChar0('x');
	PutChar0(HexTable[(send >> 4)]);
	PutChar0(HexTable[(send & 0x0f)]);
	PutChar0(' ');
}

/*void PutHex16bit0(uint16 send)
{
	PutChar0('0');
	PutChar0('x');
	PutChar0(HexTable[(send >> 12)]);
	PutChar0(HexTable[((send >> 8) & 0x0f)]);
	PutChar0(HexTable[((uint8)send) >> 4]);
	PutChar0(HexTable[(uint8)send & 0x0f]);
	PutChar0(' ');
} */

void NextLine0(void)	//換行
{
	PutChar0(0x0d);
	PutChar0(0x0a);
}

void UART0_ISR(void) interrupt 4 		//uart 中斷程序
{
	//uint8 temp;
	if(RI_0 == 1)    //收到數據
  	{
		RI_0 = 0;                     //清中斷請求
		//temp = SBUF0;
  	}
 	else  //發送完一字節數據
  	{
   		TI_0 = 0;
   		//sending = 0;               //清發送標志
  	}
}