24stm32外设篇红外线发射工作原理及程序设计

红外编码调制通常有通过脉冲宽度来实现信号调制的脉宽调制（）率位38KHz。达到红外编码的频率要求。4.24.1红外线发送原理图数；USART串口通讯函数；定时器函数。Misc.c//中断控制字（优先级设置）库函数stm32f10x_exti.c//外部中断库处理函数stm32f10x_tim.c//定时器库处理函数stm32f10x_usart.c//串口通讯函数#ifndef#ifndef_pbdata_H#define#include"misc.h"#include"stm32f10x_exti.h"#include"stm32f10x_tim.h"#include"sttdio.h"#include"hw_fs.h"externu8dt;//定义全局变量externu32hw_jsm;//定义全局变量externu8hw_jsbz;voidRCC_HSE_Configuration(void);voiddelay(u32nCount);voiddelay_us(u32nus);voiddelay_ms(u16ifndef、#endifpbdata.h现错误提示。如果不加这两条语句，当两个文件同时调用pbdata文件时，#includeu8dt=0;u32flag=0;u8js_count=0;#includeu8dt=0;u32flag=0;u8js_count=0;{RCC_DeInit();/*将外设RCC寄存器重设为缺省值*/ if(RCC_WaitForHSEStartUp(SUCCESS/*HSE起振,—AHB——APB2——APB1HCLK /*使能PLL*/while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)RESET)/*RCC while(RCC_GetSYSCLKSource( /*0x08：PLL}}voiddelay(u32{for(;nCount!=0;nCount--} 称：delay_us(u32 能：微秒延时函参数：u32 明voiddelay_us(u32nus){u32SysTick->LOAD={temp=SysTick- SysTick->CTRL=0x00;SysTick->VAL=0X00;} 称：delay_ms(u16 能：毫秒延时函参数：u16 明voiddelay_ms(u16nms){u32SysTick->LOAD=9000*nms;{temp=SysTick- SysTick->CTRL=0x00;//关闭计数器SysTick->VAL=0X00;}我们强调，每个工程都必须在开始时配置并启动STM32系统时钟，能{ { }//printf("字符串输出在中断处理stm32f10x_it.c1TIM21voidGPIO_ResetBits(GPIO_TypeDef*GPIOx,u16GPIOx：xA，B，C，DEGPIOGPIO_Pin_x(x0-15)的任意组合无无无无/*ClearstheGPIOAportpin10andpin15*/GPIO_ResetBits(GPIOA,GPIO_Pin_10|GPIO_Pin_15);GPIOWriteBit2voidGPIO_WriteBit(GPIO_TypeDef*GPIOx,u16GPIO_Pin,GPIOx：xA，B，C，DEGPIOGPIO_Pin_x(x0-15)的任意组合Bit_RESET:Bit_SET:设置数据端口位无无无无无/*SettheGPIOAportpin15*/GPIO_WriteBit(GPIOA,GPIO_Pin_15,Bit_SET);3u16GPIO_ReadInputData(GPIO_TypeDef*GPIOx：xA，B，C，DEGPIO无无无/*ReadtheGPIOCinputdataportandstoreitinReadValueu16ReadValue=#include"stm32f10x_it.h"#include"stm32f10x_it.h"#include"stm32f10x_rcc.h"#include"misc.h"#includevoid{}void{{ }void{if(js_count>0)js_count--if(flag==1)if(flag==1)1，{GPIO_Pin_12))));//向PD-12管脚每隔一定时间写与上次取反的状态值}{}}#ifndef_HW_FS_H#define_HW_FS_H#ifndef_HW_FS_H#define_HW_FS_Hvoidhw_fs(u32dt);#include#includevoid{TIM_TimeBaseInitTypeDef}voidhw_fs(u32{u8while(js_count);while(js_count);{js_count=42;//0.56mswhile(js_count); {js_count=43;//0.565ms}{js_count=128;//1.69ms}dt=dt<<1;}js_count=20;//0.263msjs_count=20;//0.263ms}#include#includevoidRCC_Configuration(void);voidGPIO_Configuration(void);voidNVIC_Configuration(void);intfputc(intch,FILE{returnch;}int{{//printf(" }}void{RCC_Configuration();u32RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);}void{ GPIO_InitTypeDef}void{ NVIC_InitTypeDefNVIC_InitStructure.NVIC_IRQChannel=NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=NVIC_InitStructure.NVIC_IRQChannelSubPriority=NVIC_InitStructure.NVIC_IRQChannelCmd=NVIC_InitStructure.NVIC_IRQChannel=NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=NVIC_InitStructure.NVIC_IRQChannelSubPriority=NVIC_InitStructure.NVIC_IRQChannelCmd=}voidvoid{ USART_InitTypeDefUSART_InitStructu