ev1527、pt2262等433/315MHZ芯片用stc15w204s-sop8單片機解碼，含源程序

• 硬件介紹：
• 軟件介紹：
• 單片機引腳定義：
• 解碼原理：
• 最終結果：
• • 主要代碼 pt2262.c
  • 頭文件 cofig.h
  • time0中斷 interrupt.c
  • time0中斷頭文件 interrupt.h
  • 子程序 subPG.c
  • 子程序頭文件 subPG.h

硬件介紹：

硬件，某寶上大把：
1、433發射遙控1個，3元；
2、433超外差接收模塊1個，0.6元；
3、stc最小系統板一個，筆者用的是STC-15W204S-SOP8最小版1.6元；
4、TTL編程線下載1根，6元；
我都是在某寶上買的，總價值不到12元

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軟件介紹：

自行下載：
1、 keilC51
2、 stc-isp-15xx-v6.87E燒寫程序
3、 串口調試工具
4、 STC-USB驅動

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單片機引腳定義：

引腳定義，均可以改變，自定義
1、P3.0 RXD引腳，軟件模擬串口接收，接上位機TXD
2、P3.1 TXD引腳，軟件模擬串口發送，接上位機RXD
3、P3.2 接433模塊DO輸出引腳
4、P3.3 LED指示燈
5、P5.4 5.5空閑

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解碼原理：

略，度娘。簡單來說就是檢測433遙控發送的高低電平寬度，0.8-1毫秒為bit ‘1’,0.25-0.35毫秒為bit ‘0’

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最終結果：

結果：
燒錄成功后，打開串口，波特率設置為38400，按433遙控按鍵，會通過串口調試工具接收到3字節的解碼輸出。

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主要代碼 pt2262.c

#include <STC15F104E.H> #include "public/inc/config.h" #include "public/inc/interrupt.h" #include "public/inc/subPG.h"//unsigned char bufSend[16] = {97,98,99,65,66,'f','g','h','i','j','k','l','m','n','o','p'}; unsigned int buftime[40]; unsigned char inc; bit dataB; bit T2Action; bit RECEIVE; //????void main() {uchar data1,data2,data3,counttime,i=0;int time;int timeL;//低電平持續時間int timeH; //高電平持續時間UART_INIT(); //系統初始化YS100ms(50);LED=0;while(1){do {LED=0;}while(P3_2==1);if((P3_2==0) && (T2Action==0)) //等待低電平，低電平開始記時{AUXR &= 0XEF;T2H=0x00;T2L=0x00;//TF0=0;AUXR |= 0X10;T2Action=1;while(1){if((P3_2==1) && (T2Action==1)){AUXR &= 0XEF;time=T2H*256+T2L; //記下低電平寬度時間T2Action=0;T2H=0x00;T2L=0x00;//TF0=0;AUXR |= 0X10;if((time>10000) && (time<10250)) //檢測同步碼約10ms{counttime=0;time=0;do {} while(P3_2==1);if((P3_2==0) && (T2Action==0)) //等待第一個低電平，一有低電平馬上記時{AUXR &= 0XEF;time=T2H*256+T2L; //記下第一個高電平寬度時間,防止誤觸發if((time>300) && (time<450)) //檢測同步碼高電平約350us{RECEIVE=1; //檢測到同步碼時 置標志位 RECEIVE=1inc = 0;data1=0;data2=0;data3=0;}}}break;}}} /如果RECEIVE==1則同步碼接收完畢，進入數據解碼程序///if(RECEIVE==1) //檢測到同步碼后開始解碼{LED=1; //綠發光二極管燈亮（調試用）RECEIVE=0;while(1){do {} while(P3_2==1);if((P3_2==0) && (T2Action==0)) //等待第一個低電平，一有低電平馬上記時{AUXR &= 0XEF;timeH=T2H*256+T2L; //記高電平寬度時間T2Action=1;T2H=0x00;T2L=0x00;//TF0=0;AUXR |= 0X10;while(1){if((P3_2==1) && (T2Action==1)){AUXR &= 0XEF;timeL=T2H*256+T2L; //記低電平寬度時間//buftime[inc] = timeL;T2Action=0;T2H=0x00;T2L=0x00;//TF0=0;AUXR |= 0X10; //開始記高電平時間break;}}}if(inc++ <= 23) //24bit數據單元{ if((timeL>1200) || (timeL<100)) //干擾碼{break; }dataB = 0;if((timeL>800) && (timeL < 1000))dataB = 1;if(inc < 8){data1 <<= 1;data1 |= dataB; }else if((inc >= 8) && (inc < 16)){data2 <<= 1;data2 |= dataB;}else if((inc >= 16) && (inc < 24)){data3 <<= 1;data3 |= dataB; }/* for(i=0;i<inc;i++){send_num2uart(66066);send_num2uart(buftime[i]);}*/}else{inc = 0;send_num2uart(data1);send_num2uart(data2);send_num2uart(data3);break; //24位接收完畢，退出解碼程序}}}} }

頭文件 cofig.h

#ifndef _CONFIG_H #define _CONFIG_H#include <STC15F104E.H> #define uchar unsigned char #define NUM_LEN 5 //數據轉為字符串，字符串最長為6 //設置通信波特率 //#define BAUD 0xF400 // 1200bps @ 11.0592MHz //#define BAUD 0xFA00 // 2400bps @ 11.0592MHz //#define BAUD 0xFD00 // 4800bps @ 11.0592MHz //#define BAUD 0xFE80 // 9600bps @ 11.0592MHz //#define BAUD 0xFF40 //19200bps @ 11.0592MHz #define BAUD 0xFFA0 //38400bps @ 11.0592MHz sbit RXB = P3^0; //p3^0為串口接收引腳 UART TX/RX port sbit TXB = P3^1; //p3^1為串口發送引腳 UART TX/RX port sbit LED = P3^3; //p3^3為LED指示燈 UART TX/RX port sbit P3_2 = P3^2; //p3^2為遙控數據D0輸入 UART TX/RX port extern bit T2Action;//T2定時器是否正在工作標志位 extern bit RECEIVE; //接收無線遙控標志位 #endif

time0中斷 interrupt.c

//Timer interrupt routine for UART #include "../inc/config.h" #include "../inc/interrupt.h" unsigned char TBUF,RBUF; unsigned char TDAT,RDAT; unsigned char TCNT,RCNT; unsigned char TBIT,RBIT; bit TING,RING; bit TEND,REND;void tm0() interrupt 1 { #if 0if (RING){if (--RCNT == 0){RCNT = 3; //reset send baudrate counterif (--RBIT == 0){RBUF = RDAT; //save the data to RBUFRING = 0; //stop receiveREND = 1; //set receive completed flag}else{RDAT >>= 1;if (RXB) RDAT |= 0x80; //shift RX data to RX buffer}}}else if (!RXB){RING = 1; //set start receive flagRCNT = 4; //initial receive baudrate counterRBIT = 9; //initial receive bit number (8 data bits + 1 stop bit)} #endifif (--TCNT == 0){TCNT = 3; //reset send baudrate counterif (TING) //judge whether sending{if (TBIT == 0){TXB = 0; //send start bitTDAT = TBUF; //load data from TBUF to TDATTBIT = 9; //initial send bit number (8 data bits + 1 stop bit)}else{TDAT >>= 1; //shift data to CYif (--TBIT == 0){TXB = 1;TING = 0; //stop sendTEND = 1; //set send completed flag}else{TXB = CY; //write CY to TX port}}}} }

time0中斷頭文件 interrupt.h

#ifndef _INTERRUPT_H #define _INTERRUPT_H extern unsigned char TBUF,RBUF; extern unsigned char TDAT,RDAT; extern unsigned char TCNT,RCNT; extern unsigned char TBIT,RBIT; extern bit TING,RING; extern bit TEND,REND; #endif

子程序 subPG.c

#include "../inc/config.h" #include "../inc/subPG.h" #include <intrins.h> unsigned char string[NUM_LEN];/系統初始化函數/// void UART_INIT() { TMOD = 0x00; //初始化timer0 in 16-bit auto reload modeTL0 = BAUD;TH0 = BAUD>>8; //初始化 timer0 為自動重裝模式TR0 = 1; //tiemr0 start runningET0 = 1; //enable timer0 interruptPT0 = 1; //improve timer0 interrupt priorityEA = 1; //open global interrupt switchT2H=0x00;T2L=0x00;AUXR |= 0X90; //1001 0100T2Action=0;RECEIVE=0; //接收無線遙控標志位TING = 0;RING = 0;TEND = 1;REND = 0;TCNT = 0;RCNT = 0; }void lcd_wdat(unsigned char dat) { //寫入字符顯示數據到LCDif (TEND){TEND = 0;TBUF = dat;TING = 1;} } /演示100MS函數/// void YS100ms(unsigned char n) //@11.0592MHz {unsigned char i, j, k,l;for(l=n; l>0; l--) {_nop_();_nop_();i = 5;j = 52;k = 195;do{do{while (--k);} while (--j);} while (--i);} }void num2char(long num,unsigned char* string) //一定要注意這里的字符串長度。 {int i;i = NUM_LEN-1; // 與這里的字符串長度相對應，從最后一個字符位開始。do {string[i] = num%10+'0'; //加上 ‘0’ 就是字符了！num/=10;i = i -1;} while(i>=0); }void send_num2uart(long num){ //發送數字到串口通信。unsigned char i;num2char(num,string);// YS100ms(50);for(i=0; i<sizeof(string); i++){while (!TEND);{TEND = 0;TBUF = string[i];TING = 1;}} }

子程序頭文件 subPG.h

#ifndef _SUBPG_H #define _SUBPG_H #include "../inc/interrupt.h"extern void UART_INIT(); extern void lcd_wdat(unsigned char dat); extern void YS100ms(unsigned char n); //@11.0592MHz extern void num2char(long num,unsigned char* string); //一定要注意這里的字符串長度。 extern void send_num2uart(long num); //發送數字到串口通信。#endif

總結

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