stm32呼吸燈程序

ID:586669 · 發(fā)表于 2020-4-29 13:19

#include "stm32f10x.h"
#include <stdio.h>
uint8_t senddata_buffer[12] = "QST_DMA_TEST";
void delay(void)
{
uint32_t volatile cnt = 0xFFFFF;
while(cnt--);
}
void led_init(void)
{
GPIO_InitTypeDef GPIO_InitStruct; // 定義GPIO初始化結(jié)構(gòu)體
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); // 開啟GPIOB的時(shí)鐘
// PB5->LED
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5; // 選擇第5個(gè)引腳進(jìn)行設(shè)置
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP; // 設(shè)置該引腳為通用推挽輸出模式
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; // 設(shè)置該引腳的輸出頻率為50MHz
GPIO_Init(GPIOB, &GPIO_InitStruct); // 對(duì)該引腳進(jìn)行初始化
GPIO_SetBits(GPIOB, GPIO_Pin_5); // LED OFF
}
void nvic_init(void)
{
NVIC_InitTypeDef NVIC_InitStruct; // 定義NVIC初始化結(jié)構(gòu)體
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); // 中斷優(yōu)先級(jí)分組1
//配置EXIT0中斷
NVIC_InitStruct.NVIC_IRQChannel = EXTI0_IRQn; // 設(shè)置EXTI0中斷
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0; // 搶占優(yōu)先級(jí)設(shè)置為0
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2; // 子優(yōu)先級(jí)設(shè)置為2
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 開啟EXTI0中斷
NVIC_Init(&NVIC_InitStruct); // 對(duì)EXTI0中斷進(jìn)行初始化
//配置USART1中斷
NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn; // 設(shè)置USART1中斷
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0; //搶占優(yōu)先級(jí)設(shè)置為0
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1; // 子優(yōu)先級(jí)設(shè)置為1
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 開啟USART1中斷
NVIC_Init(&NVIC_InitStruct); // 對(duì)USART1中斷進(jìn)行
//配置TIM3中斷
NVIC_InitStruct.NVIC_IRQChannel = TIM6_IRQn; // 設(shè)置TIM6中斷
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0; //搶占優(yōu)先級(jí)設(shè)置為0
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0; // 子優(yōu)先級(jí)設(shè)置為0
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 開啟TIM6中斷
NVIC_Init(&NVIC_InitStruct); // 對(duì)TIM6中斷
//配置TIM3中斷
NVIC_InitStruct.NVIC_IRQChannel = TIM3_IRQn; // 設(shè)置TIM6中斷
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0; //搶占優(yōu)先級(jí)設(shè)置為0
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 3; // 子優(yōu)先級(jí)設(shè)置為3
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; // 開啟TIM6中斷
NVIC_Init(&NVIC_InitStruct); // 對(duì)TIM6中斷
}
void exti_init(void)
{
GPIO_InitTypeDef GPIO_InitStruct; // 定義GPIO初始化結(jié)構(gòu)體
EXTI_InitTypeDef EXTI_InitStruct; // 定義EXTI初始化結(jié)構(gòu)體
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE); // 開啟GPIOA和AFIO的時(shí)鐘
// PA0->Key
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0; // 選擇第0個(gè)引腳進(jìn)行設(shè)置
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING; // 設(shè)置該引腳為浮空輸入模式
GPIO_Init(GPIOA, &GPIO_InitStruct); // 對(duì)該引腳進(jìn)行初始化
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0); // PA0->EXTILine0
EXTI_InitStruct.EXTI_Line = EXTI_Line0; // 選擇外部中斷線0
EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt; // 設(shè)置EXTILine0為中斷模式
EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling; // 設(shè)置觸發(fā)方式為上升沿觸發(fā)
EXTI_InitStruct.EXTI_LineCmd = ENABLE; // 開啟EXTILine0
EXTI_Init(&EXTI_InitStruct); // 對(duì)EXTILine0進(jìn)行初始化
}
void usart_init(void)
{
USART_InitTypeDef USART_InitStruct; // 定義USART初始化結(jié)構(gòu)體
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); // 開啟USART1的時(shí)鐘
// PA9->Tx
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9; // 選擇第9個(gè)引腳進(jìn)行設(shè)置
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP; // 設(shè)置該引腳為復(fù)用推挽輸出
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; // 設(shè)置該引腳輸出速率為50MHz
GPIO_Init(GPIOA, &GPIO_InitStruct); // 對(duì)該引腳進(jìn)行初始化
// PA10->Rx
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10; // 選擇第10個(gè)引腳進(jìn)行配置
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING; // 設(shè)置該引腳為浮空輸入模式
GPIO_Init(GPIOA, &GPIO_InitStruct); // 對(duì)該引腳進(jìn)行初始化
// USART1配置
USART_InitStruct.USART_BaudRate = 115200; // 設(shè)置波特率為115200
USART_InitStruct.USART_WordLength = USART_WordLength_8b;// 設(shè)置數(shù)據(jù)位為8位
USART_InitStruct.USART_Parity = USART_Parity_No; // 不使用校驗(yàn)位
USART_InitStruct.USART_StopBits = USART_StopBits_1; // 設(shè)置1位停止位
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;// 關(guān)閉硬件流控制
USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; // 開啟發(fā)送和接收功能
USART_Init(USART1, &USART_InitStruct); // 對(duì)USART1進(jìn)行初始化
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); // 開啟USART1的接受中斷
USART_Cmd(USART1, ENABLE); // 開啟USART1
}
// USART1發(fā)送字節(jié)函數(shù)
void usart1_sendbyte(char sendbyte)
{
USART_SendData(USART1, sendbyte); // 發(fā)送一個(gè)字節(jié)
while(!USART_GetFlagStatus(USART1, USART_FLAG_TXE));// 等待數(shù)據(jù)寄存器為空
}
// USART1發(fā)送字符串函數(shù)
void usart1_sendstring(char *sendstring)
{
uint8_t cnt = 0;
do
{
usart1_sendbyte(*(sendstring + cnt));
cnt++;
}
while(*(sendstring + cnt) != '\0'); // 發(fā)送字符串
while(!USART_GetFlagStatus(USART1, USART_FLAG_TC)); // 判斷字符串是否發(fā)送完成
}
void tim_init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;//定義定時(shí)器時(shí)基初始化結(jié)構(gòu)體
TIM_OCInitTypeDef TIM_OCInitStruct;//定義輸出比較初始化結(jié)構(gòu)體
GPIO_InitTypeDef GPIO_InitStruct;//定義GPIO初始化結(jié)構(gòu)體
//TIM6配置
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6 | RCC_APB1Periph_TIM3,ENABLE);//開啟TIM6和TIM3的時(shí)鐘
TIM_TimeBaseStruct.TIM_Prescaler = (7200 - 1);
TIM_TimeBaseStruct.TIM_Period = (10000 - 1);
TIM_TimeBaseStruct.TIM_CounterMode = TIM_CounterMode_Up;//設(shè)置定時(shí)器計(jì)數(shù)模式
TIM_TimeBaseStruct.TIM_ClockDivision = TIM_CKD_DIV1;//設(shè)置時(shí)鐘分隔
TIM_TimeBaseStruct.TIM_RepetitionCounter = 0;//設(shè)置時(shí)鐘重復(fù)為0
TIM_TimeBaseInit(TIM6,&TIM_TimeBaseStruct);//設(shè)置初始化
TIM_ITConfig(TIM6,TIM_IT_Update,ENABLE);
TIM_Cmd(TIM6,ENABLE);
//TIM3配置,PB0->TIM3_CH3 PWM
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStruct);
//TIM3時(shí)基部分
TIM_TimeBaseStruct.TIM_Prescaler = (72 - 1);
TIM_TimeBaseStruct.TIM_Period = (100 - 1);//10KMZ
TIM_TimeBaseStruct.TIM_CounterMode = TIM_CounterMode_Up;//設(shè)置定時(shí)器計(jì)數(shù)模式
TIM_TimeBaseStruct.TIM_ClockDivision = TIM_CKD_DIV1;//設(shè)置時(shí)鐘分隔,不分頻
TIM_TimeBaseStruct.TIM_RepetitionCounter = 0;//設(shè)置時(shí)鐘重復(fù)為0
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStruct);//設(shè)置初始化
//TIM3輸出比較部分
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;//PWM模式
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStruct.TIM_Pulse = 0;
TIM_OC3Init(TIM3,&TIM_OCInitStruct);//對(duì)TIM3的CH3初始化
TIM_OC3PreloadConfig(TIM3,TIM_OCPreload_Enable);//開啟TIM3的預(yù)加載寄存器
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);//開啟TIM3的中斷
TIM_Cmd(TIM3,ENABLE);//開啟TIM3
}
//void dma_init(void)
//{
// DMA_InitTypeDef DMA_InitStuct;
// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);//開啟DMA1時(shí)鐘
// DMA_InitStuct.DMA_PeripheralBaseAddr = USART1_BASE+0x04;/*(uint32_t)USART1->DR; *///指定外設(shè)地址
// DMA_InitStuct.DMA_MemoryBaseAddr = (uint32_t)senddata_buffer;//指定存儲(chǔ)器地址
// DMA_InitStuct.DMA_DIR = DMA_DIR_PeripheralDST;
// DMA_InitStuct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
// DMA_InitStuct.DMA_MemoryInc = DMA_MemoryInc_Enable;
// DMA_InitStuct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
// DMA_InitStuct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
// DMA_InitStuct.DMA_BufferSize = 12;
// DMA_InitStuct.DMA_Mode = DMA_Mode_Normal;
// DMA_InitStuct.DMA_Priority = DMA_Priority_High;
// DMA_InitStuct.DMA_M2M = DMA_M2M_Disable;
// DMA_Init(DMA1_Channel4,&DMA_InitStuct);
// DMA_Cmd(DMA1_Channel4,ENABLE);
//}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
led_init(); // LED初始化函數(shù)
nvic_init(); // NVIC配置函數(shù)
exti_init(); // EXTI配置函數(shù)
usart_init(); // USART配置函數(shù)
tim_init(); //TIM配置函數(shù)
// dma_init(); //DMA配置函數(shù)
// USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE);//USART1向DMA1發(fā)送T請(qǐng)求
// usart1_sendstring("This is a testing\n");
// usart1_sendstring("Hello STM32\n");
/* Infinite loop */
while (1)
{
// GPIO_ResetBits(GPIOB, GPIO_Pin_5); // LED ON
// delay();
// GPIO_SetBits(GPIOB, GPIO_Pin_5); // LED OFF
// delay();
}
}

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stm32呼吸燈程序