STM32 GPIO和定时器 模拟串口

基于STM32F042,使用定时器 GPIO模拟串口，定时器自动发送数据，发送不会一直不占用CPU

#include “stm32f0xx.h“
#include 
#include “stm32f0xx_rcc.h“
#include “stm32f0xx_gpio.h“

EXTI_InitTypeDef   EXTI_InitStructure;
GPIO_InitTypeDef   GPIO_InitStructure;
NVIC_InitTypeDef   NVIC_InitStructure;

void SysClkInit（void）
{
	RCC_DeInit（）;//复位时钟

	RCC_PLLConfig（RCC_PLLSource_HSI_Div2 RCC_PLLMul_12）; //HSI 2分频（即8MHz/2=4MHz）作为PLL输入时钟，PLL 12倍频 主时钟频率48MHz

	RCC_PLLCmd（ENABLE）;//使能PLL

	while（RCC_GetFlagStatus（RCC_FLAG_PLLRDY）==RESET）//等待PLL准备好
	{
	}

	RCC_SYSCLKConfig（RCC_SYSCLKSource_PLLCLK）;//将PLLCLK设置为系统时钟源

	while（RCC_GetSYSCLKSource（） != 0x08）//判断系统时钟是否为PLLCLK
	{
	}
}

void LEDConfig（void）
{
	RCC_AHBPeriphClockCmd（RCC_AHBPeriph_GPIOF ENABLE）;//使能GPIOF所在的AHB时钟


	/* 填充IO配置结构体 */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;//PIN0，PIN1
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出模式
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//IO口频率带宽50MHz
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;//没有上拉下拉电阻

	GPIO_Init（GPIOF &GPIO_InitStructure）;
}

void BtnConfig（void）
{
	/* Enable GPIOA clock */
  RCC_AHBPeriphClockCmd（RCC_AHBPeriph_GPIOA ENABLE）;

  /* Configure PA0 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init（GPIOA &GPIO_InitStructure）;

  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd（RCC_APB2Periph_SYSCFG ENABLE）;
  /* Connect EXTI0 Line to PA0 pin */
  SYSCFG_EXTILineConfig（EXTI_PortSourceGPIOA EXTI_PinSource0）;//for exit clk

  /* Configure EXTI0 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line0;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init（&EXTI_InitStructure）;

  /* Enable and set EXTI0 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init（&NVIC_InitStructure）;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       2227  2018-04-04 15:24  STM32F0xx_StdPeriph_SenDi\Driver\misc_drv.c

     文件         99  2018-04-04 15:24  STM32F0xx_StdPeriph_SenDi\Driver\misc_drv.h

     文件       3371  2018-04-04 13:15  STM32F0xx_StdPeriph_SenDi\Driver\stm32f0xx_conf.h

     文件       6824  2018-04-08 10:19  STM32F0xx_StdPeriph_SenDi\Driver\stm32f0xx_it.c

     文件       2209  2014-12-02 18:36  STM32F0xx_StdPeriph_SenDi\Driver\stm32f0xx_it.h

     文件      13141  2018-04-04 14:33  STM32F0xx_StdPeriph_SenDi\Driver\system_stm32f0xx.c

     文件       2053  2018-04-08 10:20  STM32F0xx_StdPeriph_SenDi\Driver\tmr_drv.c

     文件        290  2018-04-08 10:18  STM32F0xx_StdPeriph_SenDi\Driver\tmr_drv.h

     文件       4368  2018-04-08 10:43  STM32F0xx_StdPeriph_SenDi\Driver\uart_drv.c

     文件        625  2018-04-08 09:05  STM32F0xx_StdPeriph_SenDi\Driver\uart_drv.h

     文件          0  2018-04-09 14:01  STM32F0xx_StdPeriph_SenDi\gpio sim uart ok.txt

     文件        339  2018-04-08 10:20  STM32F0xx_StdPeriph_SenDi\MDK-ARM\EventRecorderStub.scvd

     文件         19  2018-04-08 10:30  STM32F0xx_StdPeriph_SenDi\MDK-ARM\ExtDll.iex

     文件      68760  2018-04-08 11:02  STM32F0xx_StdPeriph_SenDi\MDK-ARM\JlinkLog.txt

     文件        755  2018-04-04 14:07  STM32F0xx_StdPeriph_SenDi\MDK-ARM\JlinkSettings.ini

     文件     319547  2018-04-08 11:02  STM32F0xx_StdPeriph_SenDi\MDK-ARM\main.crf

     文件       2377  2018-04-08 11:02  STM32F0xx_StdPeriph_SenDi\MDK-ARM\main.d

     文件     372980  2018-04-08 11:02  STM32F0xx_StdPeriph_SenDi\MDK-ARM\main.o

     文件     314810  2018-04-08 10:59  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc.crf

     文件       2227  2018-04-08 10:59  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc.d

     文件     369752  2018-04-08 10:59  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc.o

     文件     318680  2018-04-08 10:09  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc_drv.crf

     文件       2420  2018-04-08 10:09  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc_drv.d

     文件     371540  2018-04-08 10:09  STM32F0xx_StdPeriph_SenDi\MDK-ARM\misc_drv.o

    .......    174325  2018-04-09 13:40  STM32F0xx_StdPeriph_SenDi\MDK-ARM\Project.uvguix.WSZ

    .......     85548  2018-04-08 10:41  STM32F0xx_StdPeriph_SenDi\MDK-ARM\Project.uvoptx

    .......    212818  2018-04-08 10:41  STM32F0xx_StdPeriph_SenDi\MDK-ARM\Project.uvprojx

     文件      93222  2018-04-08 11:04  STM32F0xx_StdPeriph_SenDi\MDK-ARM\Project_STM32F042.dep

     文件       3646  2014-12-06 04:34  STM32F0xx_StdPeriph_SenDi\MDK-ARM\readme.txt

     文件        107  2018-04-08 10:09  STM32F0xx_StdPeriph_SenDi\MDK-ARM\startup_stm32f042.d

............此处省略202个文件信息