stc8g芯片改装红外控制电器

stc8_ir.c

#include <STC/STC8G.h>
#include <intrins.h>


sbit IR_PIN_IN = P3 ^ 2;

//http://www.51hei.com/bbs/dpj-165191-1.html
typedef unsigned char uchar;
typedef unsigned int  uint;
typedef unsigned int u16;
typedef uchar u8;
     

void Int0Init()   
{
		  IR_PIN_IN = 1;
			IT0 = 1;                  // 下降沿触发
			EX0 = 1;                  // 开启外部中断0
			EA  = 1;                  // 开总中断       
				
}

void Timer0Init(void)		//100微秒@11.0592MHz
{
	AUXR |= 0x80;		//定时器时钟1T模式
	TMOD &= 0xF0;		//设置定时器模式
	TL0 = 0xAE;		//设置定时初值
	TH0 = 0xFB;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
	
	ET0 = 1;
}

static volatile int IR_counter = 0;
uchar state = 0;
uchar bits[32];
volatile uchar irok = 0;
uchar ircode[4];  

#define IDLE (0)
#define INIT (1)
#define DATA (2)
#define FINI (4)

void irpros()    
{
        uchar num, k, i, j;
        k = 1;
        for(j=0;j<4;j++)     // addr ~addr code ~code   
        {
                for(i=0;i<8;i++)     
                {
                        num = num >> 1;  
                        if(bits[k])   
                        {
                                num = num | 0x80;
                        }
                        k++;
                }
                ircode[j] = num;   
        }        
}

int counter;
uchar bitidx = 0;
void Int0 () interrupt 0
{
		counter = IR_counter;
		IR_counter = 0;
		switch (state) {
			case IDLE: {
				state = INIT;
				bitidx = 0;
				break;
			}
			case INIT: {
				
				if (counter > 120 && counter < 150) {
					state = DATA;
				}
				break;
			}
			case DATA: {
				if (counter < 13) { // 1.125, zero
					bits[bitidx++] = 0;
				} else if (counter > 21) {// 2.225
					bits[bitidx++] = 1;
				} else {
					state = FINI;
				}
				if (bitidx >= 32) {
					irok = 1;
					irpros();
					state = FINI;
				}
				break;
			}
			case FINI: {
				state = IDLE;
				break;
			}
			default: break;
		}
}




void Timer0() interrupt 1
{
	++IR_counter;
	if (IR_counter > 200) {
		IR_counter = 0;
		state= IDLE;
	}
}

void Delay1ms(unsigned cnt)		//@11.0592MHz
{
	unsigned char i, j;
	while (cnt--) {
		i = 15;
		j = 90;
		do
		{
			while (--j);
		} while (--i);
	}
}



#define IAP_OFFSET 0x2000 //STC8G1K08
void IapIdle()
{
 IAP_CONTR = 0; //关闭 IAP 功能
 IAP_CMD = 0; //清除命令寄存器
 IAP_TRIG = 0; //清除触发寄存器
IAP_ADDRH = 0x80; //将地址设置到非 IAP 区域
 IAP_ADDRL = 0;
}
char IapRead(int addr)
{
 addr += IAP_OFFSET; //使用 MOVC 读取 EEPROM 需要加上相应的偏移
 return *(char code *)(addr); //使用 MOVC 读取数据
}
void IapProgram(int addr, char dat)
{
 IAP_CONTR = 0x80; //使能 IAP
 IAP_TPS = 12; //设置擦除等待参数 12MHz
 IAP_CMD = 2; //设置 IAP 写命令
 IAP_ADDRL = addr; //设置 IAP 低地址
 IAP_ADDRH = addr >> 8; //设置 IAP 高地址
 IAP_DATA = dat; //写 IAP 数据
 IAP_TRIG = 0x5a; //写触发命令(0x5a)
 IAP_TRIG = 0xa5; //写触发命令(0xa5)
 _nop_();
 IapIdle(); //关闭 IAP 功能
}
void IapErase(int addr)
{
 IAP_CONTR = 0x80; //使能 IAP
 IAP_TPS = 12; //设置擦除等待参数 12MHz
 IAP_CMD = 3; //设置 IAP 擦除命令
 IAP_ADDRL = addr; //设置 IAP 低地址
 IAP_ADDRH = addr >> 8; //设置 IAP 高地址
 IAP_TRIG = 0x5a; //写触发命令(0x5a)
 IAP_TRIG = 0xa5; //写触发命令(0xa5)
 _nop_(); //
 IapIdle(); //关闭 IAP 功能
} 



uchar learning = 0;

sbit led = P3^3;
sbit btn = P5^5;
sbit btn2 = P5^4;
sbit btn3 = P3^1;
sbit btn4 = P3^0;


u8 check_pin() {
	if (!btn) return 1;
	if (!btn2) return 2;
	if (!btn3) return 3;
	if (!btn4) return 4;
	return 0;
}

u8 check_act(u8 pin) {
	if (pin == 1) return !btn;
	if (pin == 2) return !btn2;
	if (pin == 3) return !btn3;
	if (pin == 4) return !btn4;
	return 0;
}

void set_pin(u8 pin, u8 val) {
	if (pin == 1) btn = val;
	if (pin == 2) btn2 = val;
	if (pin == 3) btn3 = val;
	if (pin == 4) btn4 = val;
	
}

unsigned char mcodes[5];

void main()
{
	  u8 act,idx,btn_times, valid;
		P3M1 = 0; P3M0 = 0x08;
		P5M1 = 0; P5M0 = 0;
	
		Int0Init();
		Timer0Init();
	
  	
		led = 0;
		btn = 1;
		
	
		for(idx = 1; idx <= 4; ++idx) {
			mcodes[idx] = IapRead(0x0010 + idx);
		}
	
		while(1) {
			if (irok) {
				irok = 0;
				if (learning) {
					mcodes[learning] = ircode[2];
					led = 0;
					IapProgram(0x0010 + learning, mcodes[learning]);
					learning = 0;
				} else {	
					for(idx = 1; idx <= 4; ++idx) {
						if (mcodes[idx] == ircode[2]) {
							led = 1;
							set_pin(idx, 0);
							Delay1ms(200);
							led = 0;
							set_pin(idx, 1);
						}
					}
				}
			}
			act = check_pin();
			if (act) {
				valid = 1;
				for (btn_times = 0; btn_times < 100; ++btn_times) {
					Delay1ms(10);
					if (!check_act(act)) {
						valid = 0;
						break;
					}
				}
				if  (valid) {
					led = 1;
					learning = act;
				}
			}
			
		}
}
      

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