#include "sys.h"
#include "delay.h"
#include "rf.h"
#include "led.h"
unsigned char hle_w,lle_w; //高,低电平宽度
unsigned char ma_n;
void RF_val(void);
unsigned int bma;
unsigned int mma;
unsigned int rm_data;
unsigned char re_alarm_ID_ok = 0;
int s_TO; //过程定时
union flag myFlag;
void RF_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
//RF
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
GPIO_Init(GPIOB,&GPIO_InitStructure);
}
void Tim2_Init(void)//初始化
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period =100; //自动重装载值
TIM_TimeBaseStructure.TIM_Prescaler = 84-1; //定时器分频
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_ARRPreloadConfig(TIM2, ENABLE); //使能预装载
TIM_ClearITPendingBit(TIM2,TIM_IT_Update); //预先清除所有中断位
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE); //开中断
TIM_Cmd(TIM2, ENABLE);
}
void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
RF_val();
TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
}
}
void RF_val(void)
{
////////////////////////////////////////////////////////////////////////////////////////
if (!RF)
{
lle_w++;// 检测到低电平 低电平时间加1
myFlag.oneBit.old_bit = 0;
}
else // 检测到高电平
{
hle_w++;//记录高电平时间
if (!myFlag.oneBit.old_bit)// 检测到从低到高的跳变,已检测到一个完整(高-低)电平周期
{
//H 200us ~ 700us
if (((hle_w >= 2)&&(hle_w <= 7))&&((lle_w >= 50)&&(lle_w <= 170))) //判同步码
{
//L 6000 ~ 17000us
if((lle_w >= 60)&&(lle_w <= 170))
{
ma_n = 0;
myFlag.oneBit.tb_ok = 1;
bma = 0;
}
}
//数据低电平 800 ~ 1300us
else if ((myFlag.oneBit.tb_ok)&&((lle_w >= 8)&&(lle_w <= 13)))
{
//已经接收到同步码,判为0
bma = bma << 1;
if(ma_n == 23) //收完了
{
if(!myFlag.oneBit.rf_ok1)//第一次接收
{
mma = bma;
myFlag.oneBit.rf_ok1 = 1;
ma_n = 0;
myFlag.oneBit.tb_ok = 0;
s_TO = 1500;
}
else
{
myFlag.oneBit.rf_ok2 = 1; //第2次
ma_n = 0;
myFlag.oneBit.tb_ok = 0;
}
}
ma_n++; //未收完
}
//数据高电平 取数据1 200us ~ 700us
else if ((myFlag.oneBit.tb_ok)&&((lle_w >= 2)&&(lle_w <= 7)))
{
bma = bma << 1;
if(ma_n < 23) bma += 1;
if(ma_n == 23)
{
bma += 1;
if(!myFlag.oneBit.rf_ok1)//第一次接收
{
mma = bma;//接收到的编码
myFlag.oneBit.rf_ok1 = 1;
myFlag.oneBit.tb_ok = 0;
ma_n = 0;
s_TO = 1500;
}
else //第二次接收数据
{
myFlag.oneBit.rf_ok2 = 1;
myFlag.oneBit.tb_ok = 0;
ma_n = 0;
}
}
ma_n++;
}
//解码失败
else
{
ma_n = 0;
myFlag.oneBit.tb_ok = 0;
bma = 0;
hle_w = 1;
lle_w = 0;
}
lle_w = 0;
hle_w = 1;
}
myFlag.oneBit.old_bit = 1; // 记录本次电平状态
}
////////////////////////////////////////////////////////////////////////////////////////
if(myFlag.oneBit.rf_ok1) //规定时间内接受到2帧相同的编码数据才有效
{
s_TO--; //规定时间内接受到2帧相同的编码数据定时 150ms
if(!s_TO) { myFlag.oneBit.rf_ok1 = 0;}
if(myFlag.oneBit.rf_ok2)
{
if(mma == bma)//比较两次接收到的编码是否一致 OK
{
myFlag.oneBit.rf_ok = 1;//接收到数据成功
myFlag.oneBit.rf_ok1 = 0;
myFlag.oneBit.rf_ok2 = 0;
rm_data = mma; //提取数据
re_alarm_ID_ok = 1; //数据收好标志
// LED = !LED;
// delay_ms(1);
// LED = !LED;
}
else//接收数据无效 NO
{
myFlag.oneBit.rf_ok = 0;
myFlag.oneBit.rf_ok1 = 0;
myFlag.oneBit.rf_ok2 = 0;
}
}
}
}