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標(biāo)題:
紅外調(diào)制解調(diào)協(xié)議stm32源碼
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作者:
Fution
時(shí)間:
2018-7-6 12:40
標(biāo)題:
紅外調(diào)制解調(diào)協(xié)議stm32源碼
紅外通信源碼
#include "include.h"
/********************************************************************
發(fā)送紅外數(shù)據(jù)的邏輯協(xié)議在"ir.c"里面 --> _deflag處查找 *
*********************************************************************/
u16 tempi = 0;
u8 IR_val = 0;
int main(void)
{
// u8 i;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 設(shè)置中斷優(yōu)先級(jí)分組2
uart_init(9600);
delay_init();
ir_re_init(); //IR接收初始化 PA1--TIM5--CH2
TIM3_2PWM_Init(1893,0);//不分頻。PWM頻率=38Khz //IR -- PWM發(fā)射初始化 PA7--TIM3--CH2
KEY_Init();
LED_Init();
LED0=0;
while(1)
{
if(tempi >= 250)
{
tempi = 1;
}
IR_sent(tempi);
printf("1:%d\r\n",tempi);
if(IR_receive_finish(&IR_val) == 0)
{
LED1=0;
if(tempi==IR_val)
{
tempi += 1;
printf("2:%d\r\n",IR_val);
}
delay_ms(100);
// uart1_printf("recev",IR_RXBUff,16); //串口1打印出數(shù)組tab內(nèi)的16個(gè)數(shù)據(jù)
}
LED1=1;
LED0=1;
}
}
復(fù)制代碼
#include "ir.h"
//[7]:保留
//[6]:保留
//[5]://標(biāo)記下降沿是否已經(jīng)被捕獲
//[4]://標(biāo)記上升沿是否已經(jīng)被捕獲
//[3:0]:溢出計(jì)時(shí)器
u8 key_sta=0;
u16 LOW_value=0;
u16 HIGH_value=0;
u16 ii=0;
u16 tab[500];
u16 IR_RXBUff[500];
//u16 IR_TXBUff[500];
u8 num_b[8] = {0}; //十進(jìn)制轉(zhuǎn)二進(jìn)制數(shù)組
u16 num_val[16] = {0}; //發(fā)送數(shù)組
void ir_re_init(void) //IR接收初始化 PA1--TIM5--CH2
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;//上拉輸入
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 0XFFFF; //設(shè)定計(jì)數(shù)器自動(dòng)重裝值 最大10ms溢出
TIM_TimeBaseStructure.TIM_Prescaler =(72-1); //預(yù)分頻器,1M的計(jì)數(shù)頻率,1us加1.
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計(jì)數(shù)模式
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);
TIM_ICInitStructure.TIM_Channel=TIM_Channel_2;
TIM_ICInitStructure.TIM_ICPolarity=TIM_ICPolarity_Falling;//下降沿觸發(fā)
TIM_ICInitStructure.TIM_ICSelection=TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler=TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter=0x00;
TIM_ICInit(TIM5,&TIM_ICInitStructure);
TIM_Cmd(TIM5,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel= TIM5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig( TIM5,TIM_IT_CC2,ENABLE);
}
void TIM5_IRQHandler(void) //IR接收中斷
{
if(TIM_GetFlagStatus(TIM5, TIM_FLAG_CC2) == SET)//觸發(fā)中斷
{
if(R_DATA==1)
{
if(key_sta&0x20)
{
LOW_value=TIM_GetCapture2(TIM5);
IR_RXBUff[ii]=LOW_value;
ii++;
TIM_SetCounter(TIM5, 0);//清零計(jì)數(shù)器的值
TIM_OC2PolarityConfig(TIM5, TIM_ICPolarity_Falling);
key_sta&=0xdf;//下降沿捕獲清除 清除 0x20
}
key_sta|=0x10;//上升沿被成功捕獲 標(biāo)記0x10
}
else if(R_DATA==0)
{
if(key_sta&0x10)
{
HIGH_value=TIM_GetCapture2(TIM5);
IR_RXBUff[ii]=HIGH_value;
ii++;
key_sta&=0xef;//上升沿捕獲清除 清除0x10
}
TIM_SetCounter(TIM5, 0);//清零計(jì)數(shù)器的值
TIM_OC2PolarityConfig(TIM5, TIM_ICPolarity_Rising);
key_sta|=0x20;//下降沿被成功捕獲 標(biāo)記 0x20
}
}
TIM_ClearFlag(TIM5,TIM_IT_CC2);
}
//0為成功
u8 IR_receive_finish(u8 *p) //IR接收完成標(biāo)志 (此處給的10ms等待)
{
u8 i,j;
u8 val_t = 0;
u16 k=0;
while(ii<=10 && k<50000) //等待開(kāi)始接收數(shù)據(jù),50ms沒(méi)有收到數(shù)據(jù)就跳出
{
k++;
delay_us(1);
}
delay_ms(30);
// printf("%d\r\n",ii);
if(ii>20)
{
delay_ms(500);
}
// printf("%d\r\n",ii);
if(ii>=15 && k<50000)
{
for(i=0;i<16;i+=2) //把38k波解調(diào)成邏輯0|1 存到一個(gè)字節(jié)的各個(gè)位
{
if((IR_RXBUff[i]>=Half_IR)||(IR_RXBUff[i+1]>=Half_IR))
{
num_b[i/2] = 1;
}
else if((IR_RXBUff[i]<Half_IR)&&(IR_RXBUff[i+1]<Half_IR))
{
num_b[i/2] = 0;
}
}
for(j=0;j<8;j++) //把2進(jìn)制數(shù)變?yōu)槭M(jìn)制數(shù)
{
if(num_b[j]==1)
{
val_t |= 1<<j;
}
}
*p = val_t;
ii = 0;
key_sta = 0;
return 0;
}
return 1;
}
//PWM輸出初始化
//arr：自動(dòng)重裝值
//psc：時(shí)鐘預(yù)分頻數(shù)
void TIM3_2PWM_Init(u16 arr,u16 psc) //IR -- PWM發(fā)射初始化 PA7--TIM3--CH2
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);//
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE); //使能GPIO外設(shè)時(shí)鐘使能
//設(shè)置該引腳為復(fù)用輸出功能,輸出TIM1 CH1的PWM脈沖波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //PA7--TIM3--CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復(fù)用推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = arr; //設(shè)置在下一個(gè)更新事件裝入活動(dòng)的自動(dòng)重裝載寄存器周期的值 80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //設(shè)置用來(lái)作為T(mén)IMx時(shí)鐘頻率除數(shù)的預(yù)分頻值 不分頻
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //設(shè)置時(shí)鐘分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上計(jì)數(shù)模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根據(jù)TIM_TimeBaseInitStruct中指定的參數(shù)初始化TIMx的時(shí)間基數(shù)單位
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //選擇定時(shí)器模式:TIM脈沖寬度調(diào)制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比較輸出使能
TIM_OCInitStructure.TIM_Pulse =0; //設(shè)置待裝入捕獲比較寄存器的脈沖值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High ; //輸出極性:TIM輸出比較極性高
TIM_OC2Init(TIM3, &TIM_OCInitStructure); //☆注意這塊的通道數(shù)的選擇☆
TIM_Cmd(TIM3, ENABLE); //使能TIM4
}
void IR_sent(u8 val) //IR發(fā)射 (5ms發(fā)完16位)
{
u8 jj=0;
u8 i,j,k=0;
//IR發(fā)射前要關(guān)閉紅外接收，防止干擾頻繁進(jìn)中斷導(dǎo)致單片機(jī)hard fuilt
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,DISABLE); //IR接收初始化 PA1--TIM5--CH2
//IR發(fā)射前要關(guān)閉紅外接收，防止干擾頻繁進(jìn)中斷導(dǎo)致單片機(jī)hard fuilt
for(i=0;i<8;i++) //把十進(jìn)制數(shù)字變?yōu)槎M(jìn)制數(shù)字
{
if( ( val&(1<<i) ) )
{
num_b[i] = 1;
}
else
{
num_b[i] = 0;
}
}
//調(diào)制數(shù)據(jù)
for(k=0;k<16;k+=2) //把將二進(jìn)制的各個(gè)位的邏輯0|1加載到38k紅外波上 _deflag
{
j=k/2;
if(num_b[j]==1)
{
num_val[k] = L_IR;
num_val[k+1] = H_IR;
}
else if(num_b[j]==0) //為0
{
num_val[k] = L_IR;
num_val[k+1] = L_IR;
}
}
LED0 = 0;
for(jj=0;jj<16;jj+=2) //PWM發(fā)射初始化 PA7--TIM3--CH2
{
if(num_val[jj]==0)
{
TIM_SetCompare2(TIM3,0);
}
else
{
if(num_val[jj]!=0)
{
TIM_SetCompare2(TIM3,(1893/3));
delay_us(num_val[jj]);
TIM_SetCompare2(TIM3,0);
if(num_val[(jj+1)]!=0)
{
TIM_SetCompare2(TIM3,0);
delay_us(num_val[(jj+1)]);//程序死在這里了
}
}
}
}
TIM_SetCompare2(TIM3,(1893/3));
delay_us(200);
TIM_SetCompare2(TIM3,0);
//IR發(fā)射前要關(guān)閉紅外接收，防止干擾頻繁進(jìn)中斷導(dǎo)致單片機(jī)hard fuilt
delay_ms(1); //延時(shí)1毫秒下面這句時(shí)鐘使能才會(huì)有效.
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE); //IR接收初始化 PA1--TIM5--CH2
//IR發(fā)射前要關(guān)閉紅外接收，防止干擾頻繁進(jìn)中斷導(dǎo)致單片機(jī)hard fuilt
LED0 = 1;
}
復(fù)制代碼
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紅外調(diào)制解調(diào)協(xié)議源碼.rar
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2019-7-25 11:03
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紅外調(diào)制解調(diào)協(xié)議源碼.rar
(364.8 KB, 下載次數(shù): 40)
紅外調(diào)制解調(diào)協(xié)議源碼.rar
(364.8 KB, 下載次數(shù): 40)