51單片機+315M無線射頻模塊發射程序

//=============================================================
//接收程序 結束
//=============================================================

#define SEND_DELAY_TIME 20//防碰撞延遲(單位：毫秒)
unsigned char send_delay = SEND_DELAY_TIME;
#define VALID_PULS_COUNT 10
unsigned char valid_puls_counts = VALID_PULS_COUNT;

//碰撞檢測在該函數中實現.由于無線模塊本身的限制,碰撞檢測為非完全檢測,只能在發送前
//檢測是否有其它單元在使用信道,在發送過程中受到的碰撞干擾是無法檢測到的.經測試,效果還行
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)//如果檢測到當前有其它單元正在發送，繼續等待
send_delay = SEND_DELAY_TIME;
else{
if(TEST_PULS(w_data, PULS_0_WIDTH)//如果檢測到當前有其它單元正在發送，繼續等待
|| 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;
}
}
}
}

#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 100//心跳間隔 X / 1000 秒
unsigned int heart_beat_timer = HEART_BEAT_INTERVAL;
unsigned int last_jiffies=0;

void main(){

init_serialcomm();
//P0=0xff;
//P2=0x00; ;
sys_init();

LED1 = 0;
LED2 = 1;
//send_string_com("ok",2);
//lcd_reset();
//lcd_power_on();
//lcd_self_test();

while(1){

if (jiffies - last_jiffies >= 50){//每次中斷為50us,所以要20次才為1ms
last_jiffies = jiffies;
heart_beat_timer--;

if (send_stat == 0 ){//碰撞測試

ET0=0;
ReadTemperature();

clock_init_again();

START_SEND(8);
send_buf[1]=Te/10+0x30;
send_buf[2]=Te%10+0x30;
send_buf[3]=.;
send_buf[4]=Te_D/10+0x30;
send_buf[5]=(Te_D%10)+0x30;
send_buf[6]=D;
send_buf[7]=