2262软件解码单片机程序

/***************************************************************************** * * File : Decode 2262 * Compiler : IAR EWAAVR 4.10a * Created : 12.05.2009 by ma guang dong * * Support mail : mgdsun2000@126.com * ****************************************************************************/ #include <iotiny25.h> #include <inavr.h> #include <ina90.h> #define DelayTime 50 #define HIGHT 1 #define LOW 0 #define YYYY 150 #define YYYX 151 #pragma vector=TIM0_OVF_vect __interrupt void TIMER0VF_Handler(void); void IntialTimer0(void); void StartTimer0(void); void StopTimer0(void); void SPI_WriteByte(char ch); void OutBit(char x); void SPI_CLK(char clk); void NSSBit(char x); void SPI_puts(char *str); void inial_spi(void); void Delay(char time); void Decode_2262(void); #define GET_REMOTE_CTR_DATA !(PINB&0x10) //#define GET_REMOTE_CTR_DATA !(PINB&0x02) // 对2262芯片的遥控编码进行解码 unsigned int abs(unsigned int a,unsigned int b); unsigned int Timer0Count=0; void main( void ) { DDRB=0x07; PORTB&=0xfb; PORTB|=0x02; // unsigned int i; /* DDRB=0x1c; PORTB|=0x04; PORTB&=0xf7;*/ WDTCR=(1<<4)|(1<<3); WDTCR=0x00; MCUCR=0; IntialTimer0(); SPI_puts("START ......"); while(1) { Decode_2262(); } } void SPI_puts(char *str) { while (*str != '\0') { SPI_WriteByte(*str++); } } void SPI_WriteByte(char ch) { char i; PORTB&=0xfe; // PORTB&=0xfb; for(i=0;i<8;i++) { if(ch&0x80) PORTB|=0x02; // PORTB|=0x10; else PORTB&=0xfd; // PORTB&=0xef; PORTB|=0x04; PORTB|=0x08; Delay(50); PORTB&=0xfb; //PORTB&=0xf7; ch=ch<<1; Delay(50); } PORTB|=0x01; //PORTB|=0x04; } void Delay(char time) { while(time--); } void Decode_2262(void) { char v,i; unsigned int rt1,rt,pp,oldrt1,ra; unsigned int rt2; char fr[2][12],ba[2][12],ppt,res1[3],res2[3]; rt1 = 0; pp = 0; oldrt1 = 0; ppt = 0; StartTimer0(); while(1) { while(1) { rt1 = 0;rt2=0; for(v=0;v==0;) { v = GET_REMOTE_CTR_DATA; } for(v=1;v==1;) { v = GET_REMOTE_CTR_DATA; rt1++; } for(v=0;v==0;) { v = GET_REMOTE_CTR_DATA; rt2++; } pp=rt2/rt1; if(pp<40 && pp>20) { break; } } if(rt1>30) // 前导的高电平过短，算作干扰，注意，这个参数和CPU的工作频率有关 { if(abs(rt1,oldrt1)<=20) // 连续的两个前导高电平持续时间不能差10 { //ppt++; ppt=1; } else { ppt =0; } ra = rt1<<1;// +rt1; // 找出基准宽度 8a for(i=0;i<12;i++) { rt = 0; for(v=0;rt<ra;) { v = GET_REMOTE_CTR_DATA; rt++; } fr[ppt][i] = v; while(1) { v = GET_REMOTE_CTR_DATA; if(v==0) break; } while(1) { v = GET_REMOTE_CTR_DATA; if(v!=0) break; } rt = 0; for(v=0;rt<ra;) { v = GET_REMOTE_CTR_DATA; rt++; } ba[ppt][i] = v; while(1) { v = GET_REMOTE_CTR_DATA; if(v==0) break; } while(1) { v = GET_REMOTE_CTR_DATA; if(v!=0) break; } } if(ppt==0) oldrt1 = rt1; else oldrt1=0; if(ppt==1) { ppt = 0; // 已经发现了连续两个合法的前导，认为是收到正确编码，可以开始解码 for(i=0;i<12;i++) // 比对两次解出的数据是否一样，如一样，则表示解码正确 { if(fr[0][i]!=fr[1][i] || ba[0][i]!=ba[1][i]) break; } if(i==12) { rt2=0; for(i=0;i<8;i++) { pp=0; if(fr[0][i]==0 && ba[0][i]==0) // SPI_WriteByte(0x30); pp=0; if(fr[0][i]==0 && ba[0][i]==1) { // SPI_WriteByte('F'); pp=2<<(i<<1); } if(fr[0][i]==1 && ba[0][i]==1) //SPI_WriteByte('1'); pp=3<<(i<<1); rt2|=pp; } res1[0]=(unsigned char)rt2; // SPI_WriteByte(temp); // res1=temp; res1[1]=(unsigned char)(rt2>>8); // SPI_WriteByte(temp); rt2=0; for(i=0;i<4;i++) { pp=0; if(fr[0][i+8]==0 && ba[0][i+8]==0) // SPI_WriteByte(0x30); pp=0; if(fr[0][i+8]==0 && ba[0][i+8]==1) { //SPI_WriteByte('F'); pp=2<<(i<<1); } if(fr[0][i+8]==1 && ba[0][i+8]==1) //SPI_WriteByte('1'); pp=3<<(i<<1); rt2|=pp; } res1[2]=(unsigned char)rt2; // StopTimer0(); i=0; if(Timer0Count<=YYYY) { for(i=0;i<3;i++) { if(res1[i]!=res2[i]) break; } } if(i!=3) { SPI_WriteByte(0x55); SPI_WriteByte(res1[0]); SPI_WriteByte(res1[1]); SPI_WriteByte(res1[2]); } for(i=0;i<3;i++) { res2[i]=res1[i]; } if(Timer0Count>YYYY) StartTimer0(); } } } else { ppt = 0; oldrt1 = 0; } } } unsigned int abs(unsigned int a,unsigned int b) { unsigned int temp; if(a>b) temp=a-b; else temp=b-a; return temp; } void IntialTimer0(void) { TCCR0A=0; TCCR0B=0; TIMSK=0x02; } void StartTimer0(void) { TCCR0B=0x04; Timer0Count=0; TCNT0=0; _SEI(); } void StopTimer0(void) { TCCR0B=0x00; _CLI(); } __interrupt void TIMER0VF_Handler(void) { Timer0Count++; if(Timer0Count>YYYY) Timer0Count=YYYX; }