main.c

一些用于电话管理的pc机下位机程序

//程序的调试可以用"串口调试助手V2.1"辅助完成
#include	"p18cxxx.h"

#pragma config OSC = XT, OSCS = OFF
#pragma config PWRT = ON
#pragma config WDTPS =32768
#pragma config CCP2MX = ON
#pragma config MCLRE = OFF
#pragma config BOR = ON   //RC2 OK
#pragma config BORV = 27
#pragma config WDT = ON
#pragma config LVP = OFF
//#include	"p18f6585.h"
#include <timers.h>
#define on 1
extern void Cmd_dispose( void );
extern void ctrl_8816(void);
void Tx_Sing_State(void);

void sound_check( void );           //信号检测
void Tx_8816_State ( void );		//驱动232返回8816设置消息
unsigned char TX8816;		//信号，请求232返回8816设置消息

void InterruptHandlerHigh(void);	//中断服务程序
void timer_isr (void);				//中断服务程序

unsigned char RC_s[10]={0,0,0,0,0,0,0,0,0,0};//字符数组
unsigned char SignalList[3]={0,0,0};
unsigned char Err;
static unsigned char RC_Count;//接受记数
unsigned char byte_Count;//字符数组的长度数
static unsigned char TX_Count;//发送记数
static unsigned char RC_Over;
static unsigned int  Led_count;
/*
 * For PIC18xxxx devices, the low interrupt vector is found at 000000018h.
 * Change the default code section to the absolute code section named
 * low_vector located at address 0x18.
 */
//底优先级中断向量
#pragma code low_vector=0x18
void low_interrupt (void)
{
  /*
   * Inline assembly that will jump to the ISR.
   */
  _asm GOTO timer_isr _endasm	//跳到低优先级中断程序
}

/*
 * Returns the compiler to the default code section.
 */
#pragma code

/*
 * Specifies the function timer_isr as a low-priority interrupt service
 * routine. This is required in order for the compiler to generate a
 * RETFIE instruction instead of a RETURN instruction for the timer_isr
 * function.
 */
#pragma interruptlow timer_isr 

/*
 * Define the timer_isr function. Notice that it does not take any
 * parameters, and does not return anything (as required by ISRs). 
 */ 

void
timer_isr (void)
{
  /*
   * Clears the TMR0 interrupt flag to stop the program from processing the
   * same interrupt multiple times.
   */
  INTCONbits.TMR0IF = 0;	//Clear Timer0 overflow flag
  T0CONbits.TMR0ON = 0;  	//8ms超时，停止TMR0，停止限时监控
  //下面写用户程序 
  RC_Over = 1;              //产生超时事件
  byte_Count = RC_Count;    //保存接受字符数
  RC_Count = 0;				//准备再次接受串行口信号
  TX_Count=0;     			//准备发送记数
  PORTD=0;
}


//高优先级中断向量
#pragma code InterruptVectorHigh=0x08
void	InterruptVectorHigh (void)
{
  _asm
    goto InterruptHandlerHigh 		//跳到高优先级中断程序
  _endasm
}

//高优先级中断服务程序
#pragma code
#pragma interrupt InterruptHandlerHigh
void	InterruptHandlerHigh ()
{
	while(PIR1bits.RCIF==1)			//若接收中断标志不为1，返回
	{
		PIR1bits.RCIF=0;
		RC_s[RC_Count++]=RCREG;		//将接收到的数据放入RC_s[]
 		//TXREG=RCREG;	
  		TMR0L = 0;					// Reset Timer0 to 0x0000
		T0CONbits.TMR0ON = 1;		// 起动限时监控
	}
	if(TX_Count<byte_Count)     	//需要发送
	{	
		if(PIR1bits.TXIF==1)		//若缓冲空
		{
		TXREG=RC_s[TX_Count++]; 	//发送一个字节，发送计数加一
		}
		if(TX_Count==byte_Count)    //不需要发送
		PIE1bits.TXIE=0;			//发送中断不使能
 	}
}

//初始化程序
void 
OpenUart(void)
{
	SPBRG=0x19;				//选择传输波特率为9600bps
	TXSTA=0X04;				//选择异步高速方式传输8位数据
	RCSTA=0X80;				//允许异步串行口工作
	TRISC=0XC0;				//将RC7,RC6设置为输入
	BAUDCONbits.BRG16=0;	//高速波特率
	TXSTAbits.TXEN=1;		//发送允许
	RCSTAbits.CREN=1;		//接受允许
	PIE1bits.RCIE=1;		//接收中断使能
	IPR1bits.RCIP=1;		//接受高中断优先级中断使能
	IPR1bits.TXIP=1;		//发送高中断优先级中断使能
	RC_Count=0;
	RC_Over=0;
	TX_Count=0;
}

void OpenMyTimer0(unsigned char config)
{
   T0CON = (0x7f & config);  // Configure timer, but don't start it yet
   INTCONbits.T0IF = 0;      // Clear Timer0 overflow flag
   INTCONbits.T0IE = 1;    	 // Enable Timer0 overflow interrupt
   INTCON2bits.TMR0IP=0;	 //TMR0低中断优先级中断使能
   TMR0H = 0x70;             //定时器高八位
   TMR0L = 0;				 // Reset Timer0 to 0x7000
}

//主程序
void
main(void)
{
	RCONbits.IPEN=1;        //使能中断优先级
	OpenUart();				//建立串口通信条件		
	OpenMyTimer0 (TIMER_INT_ON & T0_SOURCE_INT & T0_16BIT);//建立串口通信限时条件		
	INTCON|=0XC0;			//总中断和外围中断允许
    TRISE=0X7F; 			//声音信号检测位输入使能S0~S6
	TRISD=0X7F;             //声音信号检测位输入使能S20~S26
	TRISB=0X7F;				//声音信号检测位输入使能S30~S36
	TX8816=0;
byte_Count=0;
Led_count=0X1FFF;
	//循环执行下面任务
	for(;;){			
		_asm CLRWDT _endasm 
        if(Led_count--==0){						//定时一秒左右
			Led_count=0X1FFF;
			if(TX8816==0);
			//	Tx_Sing_State();	 			//下位机定时发送声音信号消息
			else 
				{ Tx_8816_State();TX8816=0;}  	//下位机发送8816消息
			PORTDbits.RD7=~PORTDbits.RD7;		//LED FLASH
		}
		if(RC_Over==1){ 	//发生232接受结束事件
			RC_Over=0; 		//清除232接受结束事件标志	     
			Cmd_dispose();	//命令处理
			Tx_Sing_State();	 			//下位机定时发送声音信号消息
		}
		//sound_check();		//外部声音信号检查
  	}
}

void sound_check()
{		
 	//RC_s[0]=2;RC_s[1]=2;RC_s[4]=1;byte_Count=5;		//状态回复指令<有语音>：02 02 bb bb 01 
 	//RC_s[0]=2;RC_s[1]=3;RC_s[4]=1;byte_Count=5;		//状态回复指令<无语音>：02 03 bb bb 01 
	if((RC_s[0]==2)&&(RC_s[1]==4)&&(RC_s[4]==1)){		//查询错误指令：02 04 bb bb 01 
		goto end_check;}
 	RC_s[0]=2;RC_s[4]=1;byte_Count=5;		            //状态回复指令
    switch(RC_s[2]){
	case 1:		if(PORTEbits.RE0==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 2:		if(PORTEbits.RE1==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 3:		if(PORTEbits.RE2==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 4:		if(PORTEbits.RE3==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 5:		if(PORTEbits.RE4==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 6:		if(PORTEbits.RE5==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 7:		if(PORTEbits.RE6==on)RC_s[1]=2;else RC_s[1]=3;break;

	case 8:		if(PORTDbits.RD0==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 9:		if(PORTDbits.RD1==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 10:	if(PORTDbits.RD2==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 11:	if(PORTDbits.RD3==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 12:	if(PORTDbits.RD4==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 13:	if(PORTDbits.RD5==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 14:	if(PORTDbits.RD6==on)RC_s[1]=2;else RC_s[1]=3;break;

	case 15:	if(PORTBbits.RB0==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 16:	if(PORTBbits.RB1==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 17:	if(PORTBbits.RB2==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 18:	if(PORTBbits.RB3==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 19:	if(PORTBbits.RB4==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 20:	if(PORTBbits.RB5==on)RC_s[1]=2;else RC_s[1]=3;break;
	case 21:	if(PORTBbits.RB6==on)RC_s[1]=2;else RC_s[1]=3;break;
	default:	RC_s[1]==4;	 break;
	}
end_check:;
}

void Tx_Sing_State (void)
{
	RC_s[5]=SignalList[0];
	RC_s[6]=SignalList[1];
	RC_s[7]=SignalList[2];
	byte_Count+=3;		
	PIE1bits.TXIE=1;			//发送中断使能,232发送		
}

void Tx_8816_State()
{

	PIE1bits.TXIE=1;			//发送中断使能,232发送		
}