下面给大家整理下315M无线模块的接收程序

#include <AT89X52.H>

#include "string.h"

//液晶块

#define LCM_RW P3_6 //定义引脚

#define LCM_RSP3_5

#define LCM_E P3_7

#define LCM_Data P1

#define Busy 0x80 //用于检测LCM状态字中的Busy标识

typedef int byte;

typedef unsigned int word;

void Read_Temp(void);

void mychar(char,char);

void WriteDataLCM(unsigned char WDLCM);

void WriteCommandLCM(unsigned char WCLCM,BuysC);

unsigned char ReadDataLCM(void);

unsigned char ReadStatusLCM(void);

void LCMInit(void);

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);

void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);

void Delay5Ms(void);

void Delay400Ms(void);

void delay(word useconds)

{

for(;useconds>0;useconds--);

}

void mychar(char xx,char yy)

{

DisplayOneChar(0,0,0x54);

DisplayOneChar(1,0,0x65);

DisplayOneChar(2,0,0x6D);

DisplayOneChar(3,0,0x70);

DisplayOneChar(4,0,0x65);

DisplayOneChar(5,0,0x72);

DisplayOneChar(6,0,0x61);

DisplayOneChar(7,0,0x74);

DisplayOneChar(8,0,0x75);

DisplayOneChar(9,0,0x72);

DisplayOneChar(10,0,0x65);

DisplayOneChar(11,0,0x3A);

///////////////////////自定义字符

WriteCommandLCM(0x48, 0); //第一行

WriteDataLCM(0x06);

WriteCommandLCM(0x49, 0); //第2行

WriteDataLCM(0x09);

WriteCommandLCM(0x4a, 0); //第3

WriteDataLCM(0x09);

WriteCommandLCM(0x4b, 0); //第4

WriteDataLCM(0x06);

WriteCommandLCM(0x4c, 0); //第5

WriteDataLCM(0x00);

WriteCommandLCM(0x4d, 0); //第6

WriteDataLCM(0x00);

WriteCommandLCM(0x4e, 0); //第7

WriteDataLCM(0x00);

WriteCommandLCM(0x4f, 0); //第8

WriteDataLCM(0x00);

DisplayOneChar(xx,yy,0x01);

DisplayOneChar(xx+1,yy,0x43);

}

//写数据

void WriteDataLCM(unsigned char WDLCM)

{

ReadStatusLCM(); //检测忙

LCM_Data = WDLCM;

LCM_RS = 1;

LCM_RW = 0;

LCM_E = 0; //若晶振速度太高可以在这后加小的延时

LCM_E = 0; //延时

LCM_E = 1;

}

//写指令

void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测

{

if (BuysC) ReadStatusLCM(); //根据需要检测忙

LCM_Data = WCLCM;

LCM_RS = 0;

LCM_RW = 0;

LCM_E = 0;

LCM_E = 0;

LCM_E = 1;

}

//读状态

unsigned char ReadStatusLCM(void)

{

LCM_Data = 0xFF;

LCM_RS = 0;

LCM_RW = 1;

LCM_E = 0;

LCM_E = 0;

LCM_E = 1;

while (LCM_Data & Busy); //检测忙信号

return(LCM_Data);

}

void LCMInit(void) //LCM初始化

{

LCM_Data = 0;

WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号

WriteCommandLCM(0x08,1); //关闭显示

WriteCommandLCM(0x01,1); //显示清屏

WriteCommandLCM(0x06,1); // 显示光标移动设置

WriteCommandLCM(0x0C,1); // 显示开及光标设置

}

//按指定位置显示一个字符

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)

{

Y &= 0x1;

X &= 0xF; //限制X不能大于15，Y不能大于1

if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;

X |= 0x80; //算出指令码

WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码

WriteDataLCM(DData);

}

//按指定位置显示一串字符 ***原来的遇到空格0x20就不显示***

void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)

{

unsigned char ListLength,j;

ListLength = strlen(DData);

Y &= 0x1;

X &= 0xF; //限制X不能大于15，Y不能大于1

if (X <= 0xF) //X坐标应小于0xF

{

for(j=0;j<ListLength;j++)

{

DisplayOneChar(X, Y, DData[j]); //显示单个字符

X++;

}

}

}

//5ms延时

void Delay5Ms(void)

{

unsigned int TempCyc = 5552;

while(TempCyc--);

}

//400ms延时

void Delay400Ms(void)

{

unsigned char TempCycA = 5;

unsigned int TempCycB;

while(TempCycA--)

{

TempCycB=7269;

while(TempCycB--);

};

}

sbit W_IN = P2^1;

sbit W_OUT = P2^0;

unsigned char w_data; //接收时用于存储两次上升沿之间的时长,发送时存储前半周

unsigned char send_busy = 0;//存储发送时后半周

unsigned char recv_TImer = 0;

bit w_stat, last_w_stat;

unsigned char jiffies=0;

void clock_TImer(void) interrupt 1 using 1{

if (send_busy){

if(w_data){

w_data--;

w_stat = 0;

}else{

send_busy--;

w_stat = 1;

}

W_OUT = w_stat;

}else{

w_stat = W_IN;

if (w_stat != last_w_stat){

last_w_stat = w_stat;

if (w_stat){

w_data = recv_TImer;

recv_TImer = 0;

}

}

if (~recv_timer)//if(recv_busy != 0xff)

recv_timer++;

}

jiffies++;

}

void clock_init(void){

jiffies = 0;

TMOD=0x02;

TH0=TL0=0x0ce;//12M,50us

// TH0=TL0=0x7a;//16M

// TH0=TL0=0x75;//16.59M

// TH0=TL0=0x72;//17M

// TH0=TL0=0x37;//24M

// TH0=TL0=0x47;//22.1844M, 100us

// TH0=TL0=0xa3;//22.1844M, 50us

EA=1;

ET0=1;

TR0=1;

}

void init_serialcomm(void)

{

SCON = 0x50; //SCON: serail mode 1, 8-bitUART, enable ucvr

TMOD |= 0x20; //TMOD: timer 1, mode 2, 8-bit reload

PCON |= 0x80; //SMOD=1;

TH1 = 0x0e6; //Baud:2400 fosc=11.0592MHz :f4

TL1 = 0x0e6;

//IE |= 0x90; //Enable Serial Interrupt

TR1 = 1; // timer 1 run

RI=0;

TI=1;

}

void serial_out(unsigned char d){

while(!TI);

TI=0;

SBUF=(d);

}

void send_string_com(unsigned char *str,int strlen)//串口程序

{ unsigned char sum;

unsigned char k=0;

//serial_out(02);

do

{ //sum^=*(str+k);

serial_out(*(str + k));

//serial_out('a');

k++;

} while(k < strlen);

//serial_out(sum);

//serial_out('e');

}

//等待指定长度的串行数据到达,超时值为每两个字节之间的间隔时间而非等待整个串的时间.

//超时单位为time_out * 100uS

bit wait_serial(unsigned char *p, unsigned char len, unsigned char time_out){

unsigned int time=jiffies;

unsigned char n=0;

do{

if (RI){

p[n++]=SBUF;

RI=0;

if(n==len)

return 0;

time=jiffies;

}

}while(jiffies-time < time_out);

return 1;

}

sys_init(){

clock_init();

init_serialcomm();

}

//=============================================================

//发送程序 开始

//=============================================================

#define PULS_0_WIDTH 8 //低电平脉宽

#define PULS_1_WIDTH 16 //高电平脉宽

#define PULS_HEAD_WIDTH 8 //前导信号脉宽

#define PULS_START_WIDTH 24 //引导信号脉宽

#define PULS_STOP_WIDTH 8 //结束码脉宽

#define PULS_HEAD_COUNTS 16 //前导信号长度

unsigned char send_buf[16];

#define send_byts send_buf[0] //剩余字节数,发送完后为0

unsigned char sending_byte; //当前正在发送的字节

unsigned char send_byte_p; //已发送字节数(含正在发送的字节)

unsigned char send_bit_p; //当前正在发送的字节已发送位数(含正在发送的位)

#define SEND_PROGRESSING 0x41

#define SEND_FAILED 0x21

#define SEND_SUCCESS 0x31

unsigned char send_stat = 0; //发送程序当前状态,为0时正常

unsigned char head_counts; //前导信号计数器(包括引导信号)

void start_send(){

send_byte_p = 0;

send_bit_p = 0;

send_stat = SEND_PROGRESSING;

head_counts = 16;

}

#define START_SEND(byts) send_buf[0]=byts;send_byts=byts;start_send()

//发送前应清除send_byte_p,send_bit_p,send_stat,并设置send_byts

//发送过程中可根据send_byts的值得到剩余字节数,根据send_byte_p的值得到已发送字节数.注意,将正在发送的字节当作已发送完毕.

//发送过程中可根据send_stat的值得到发送状态.

//发送完成后,send_byts和send_bit_p的值都为0.

#define SEND_PULS(x) w_data=send_busy=(x>>1)

void send(){

//下面两行在wirless()中已经执行过了,所以无需写上

// if (send_stat != SEND_PROGRESSING)

// return;

if (!send_busy){

if(send_byts || send_bit_p){

if (head_counts){

head_counts--;

if(head_counts)

SEND_PULS(PULS_HEAD_WIDTH);

else

SEND_PULS(PULS_START_WIDTH);

}else{

if (send_bit_p == 0){

sending_byte = send_buf[send_byte_p];

send_byte_p++;

send_byts--;

send_bit_p = 8;

}

if(sending_byte & 0x80){

SEND_PULS(PULS_1_WIDTH);

}else{

SEND_PULS(PULS_0_WIDTH);

}

sending_byte <<= 1;

send_bit_p--;

}

}else{

SEND_PULS(PULS_STOP_WIDTH);

send_stat = SEND_SUCCESS;

}

}

return;

}

//=============================================================

//发送程序 结束

//=============================================================

//=============================================================

//接收程序 开始

//=============================================================

unsigned char recv_buf[16];

#define recv_byts recv_buf[0] //应收到字节数,由每个包的第一个字节指定

unsigned char recving_byte; //当前正在接收的字节

unsigned char recv_byte_p; //已收到字节数(不含正在接收的字节)

unsigned char recv_bit_p; //当前正在接收的字节等待接收位数(不含正在接收的位)

#define RECV_FAILED 0x31

#define RECV_SUCCESS 0x41

unsigned char recv_stat = 0; //接收程序当前状态,为0时正常

unsigned char recv_step = 0; //引导脉冲标志,为0时等待引导,为1时等待数据

#define TEST_PULS(puls_in, puls_type) (puls_in > puls_type - PULS_0_WIDTH / 2 && puls_in < puls_type + PULS_0_WIDTH / 2)

#define HEAD_NEED_RECIVED 8

void recv(){

unsigned puls_width;

if ((recv_stat == RECV_SUCCESS) || !w_data)

return;

puls_width = w_data;

w_data = 0;

#if 0 //输出脉宽

serial_out(puls_width);

// printhex(puls_width);

#endif

if (recv_step < HEAD_NEED_RECIVED){

if(TEST_PULS(puls_width, PULS_HEAD_WIDTH)){

recv_step++;

}else{

recv_step = 0;

}

}else if (recv_step == HEAD_NEED_RECIVED){

if(TEST_PULS(puls_width, PULS_START_WIDTH)){

serial_out(0xbb);

recv_byte_p = 0;

recv_bit_p = 8;

recv_stat = 0;

recv_step++;

}else{

if(!TEST_PULS(puls_width, PULS_HEAD_WIDTH)){

recv_step = 0;

}

}

}else{

//serial_out(puls_width);

recving_byte <<= 1;

if(TEST_PULS(puls_width, PULS_0_WIDTH)){

recving_byte &= 0xfe;

}else if(TEST_PULS(puls_width, PULS_1_WIDTH)){

recving_byte |= 1;

}else{

serial_out(puls_width);

recv_step = 0;

serial_out(0xaa);

return;

}

recv_bit_p--;

if(recv_bit_p == 0){ //接收完一字节

recv_bit_p = 8;

// serial_out(recving_byte); //输出接收到的字符

recv_buf[recv_byte_p] = recving_byte;

recv_byte_p++;

if(recv_byte_p == recv_byts){

recv_step = 0;

recv_stat = RECV_SUCCESS;

}

}

}

}

//=============================================================

//接收程序 结束

//=============================================================

#define SEND_DELAY_TIME 20 //防碰撞延迟(单位：毫秒)

unsigned char send_delay = SEND_DELAY_TIME;

#define VALID_PULS_COUNT 10

unsigned char valid_puls_counts = VALID_PULS_COUNT;

//碰撞检测在该函数中实现.由于无线模块本身的限制,碰撞检测为非完全检测,只能在发送前

//检测是否有其它单元在使用信道,在发送过程中受到的碰撞干扰是无法检测到的.经测试,效果还行

void wirless(){

if (send_stat == SEND_PROGRESSING && send_delay == 0){

send();

if (send_stat == SEND_SUCCESS)

send_delay = SEND_DELAY_TIME;

}else{

recv();

if (recv_step > HEAD_NEED_RECIVED) //如果检测到当前有其它单元正在发送，继续等待

send_delay = SEND_DELAY_TIME;

else{

if(TEST_PULS(w_data, PULS_0_WIDTH) //如果检测到当前有其它单元正在发送，继续等待

|| TEST_PULS(w_data, PULS_1_WIDTH)

//|| TEST_PULS(w_data, PULS_HEAD_WIDTH)

|| TEST_PULS(w_data, PULS_START_WIDTH)

//|| TEST_PULS(w_data, PULS_STOP_WIDTH)

){

if (valid_puls_counts)

valid_puls_counts--;

else

send_delay = SEND_DELAY_TIME;

}else{

valid_puls_counts = VALID_PULS_COUNT;

}

}

}

}

void Display_T()

{

DisplayOneChar(9,1,recv_buf[5]);

DisplayOneChar(8,1,recv_buf[4]);

DisplayOneChar(7,1,recv_buf[3]);

DisplayOneChar(6,1,recv_buf[2]);

DisplayOneChar(5,1,recv_buf[1]);

DisplayOneChar(0,0,0x54);

}

#define SCMD_SET_PORT 0x51

#define SCMD_GET_PORT 0x52

#define SCMD_RESET 0x61

#define SCMD_LCD_OUTSTR 0x71

#define SCMD_LCD_RESET 0x72

#define SCMD_LCD_SETXY 0x73

#define SCMD_LCD_SETLINE 0x74

#define SCMD_LCD_CLEAR 0x75

#define SRESP_GET_PORT_ERROR 0x41

#define SRESP_SET_PORT_ERROR 0x42

#define HEART_BEAT_INTERVAL 200 //心跳间隔 X / 1000 秒

unsigned int heart_beat_timer = HEART_BEAT_INTERVAL;

unsigned int last_jiffies=0;

void main(){

Delay400Ms(); //启动等待，等LCM讲入工作状态

LCMInit(); //LCM初始化

Delay5Ms(); //延时片刻(可不要)

mychar(10,1); //显示 自定义字符

init_serialcomm();

P0=0x0ff;

P2=0x00;

sys_init();

//send_string_com("ok",2);

//lcd_reset();

//lcd_power_on();

//lcd_self_test();

while(1){

if (jiffies - last_jiffies >= 20){//每次中断为50us,所以要20次才为1ms

last_jiffies = jiffies;

heart_beat_timer--;

if (send_delay)

send_delay--;

}

if (heart_beat_timer == 0){

heart_beat_timer = HEART_BEAT_INTERVAL;

while(1) {recv();if (recv_stat == RECV_SUCCESS)

{

P0_0=~P0_0;

send_string_com(recv_buf,strlen(recv_buf));

Display_T();

recv_stat = 0;break;}

recv_stat = 0;

}

}

/*#if 0

if (send_stat == 0){

//碰撞测试

START_SEND(8);

send_buf[1]='T';

send_buf[2]='e';

send_buf[3]='s';

send_buf[4]='t';

send_buf[5]='O';

send_buf[6]='k';

send_buf[7]='!';

lcd_out_string("sending:");

//send_string_com(send_buf,strlen(send_buf));

printhex(send_buf[0]);

printhex(send_buf[1]);

}

#endif

*/

wirless();

if (send_stat == SEND_FAILED){

send_stat = 0;

}else if (send_stat == SEND_SUCCESS){

send_stat = 0;

P2_3=~P2_3;

}

//recv();

//send_string_com("start",5);

/*while(1) {recv();if (recv_stat == RECV_SUCCESS)

{

P0_0=~P0_0;

send_string_com(recv_buf,strlen(recv_buf));} }*/

/* if (recv_stat == RECV_SUCCESS){

//send_string_com("test1",5);

#if 1

//unsigned int i;

//for(i=0; i<recv_byts; i++)

// serial_out(recv_buf[i]); //输出接收到的字符

P0_0=~P0_0;

send_string_com(recv_buf,strlen(recv_buf));

#else

//if (recv_buf[1]=='o')

//P0=0x00;

//lcd_out_string("data recived:");

//printhex(recv_buf[0]);

//printhex(recv_buf[1]);

//OutChar('\n');

//send_string_com("test3",5);

#endif

recv_stat = 0;

}

*/

#if 0

if (RI){

unsigned char scmd[17];

heart_beat_timer = HEART_BEAT_INTERVAL;

wait_serial(scmd, 1, 0);

switch(scmd[0]){

case SCMD_RESET:

((void (code *) (void))0x0000) ();//软件复位

case SCMD_SET_PORT:

if (wait_serial(scmd, 2, 200))

break;

switch(scmd[0]){

case 0:

P0 = scmd[1];

break;

case 1:

P1 = scmd[1];

break;

case 2:

P2 = scmd[1];

break;

case 3:

P3 = scmd[1];

break;

}

break;

case SCMD_GET_PORT:

if (wait_serial(scmd, 1, 200))

break;

switch(scmd[0]){

case 0:

serial_out(P0);

break;

case 1:

serial_out(P1);

break;

case 2:

serial_out(P2);

break;

case 3:

serial_out(P3);

break;

}

break;

case SCMD_LCD_OUTSTR:

if (wait_serial(scmd, 1, 200))

break;

scmd[scmd[0]] = 0;

if (wait_serial(scmd, scmd[0], 200))

break;

lcd_out_string(scmd);

break;

case SCMD_LCD_RESET:

lcd_reset();

break;

case SCMD_LCD_CLEAR:

lcd_clear();

break;

case SCMD_LCD_SETXY:

if (wait_serial(scmd, 2, 200))

break;

SetXY(scmd[0], scmd[1]);

break;

case SCMD_LCD_SETLINE:

if (wait_serial(scmd, 1, 200))

break;

SetLine(scmd[0]);

break;

default:

break;

}

}

#endif

}

}