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標(biāo)題: STM32串口通信代碼 [打印本頁]

作者: zhang135789 時間: 2017-3-4 09:19
標(biāo)題: STM32串口通信代碼

//初始化IO 串口3

//bound:波特率

void uart3_init(u32 bound){

//GPIO端口設(shè)置

GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDefUSART_InitStructure;

NVIC_InitTypeDefNVIC_InitStructure;

//APB2改為APB1,因?yàn)?/font>USART3是連接到APB1(低速外設(shè))上的設(shè)備

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE); //??USART2,GPIOA??

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE); //??USART2,GPIOA?? USART_DeInit(USART3); //復(fù)位串口3

//USART1_TX PB.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB.10

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復(fù)用推挽輸出

GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB10

//USART1_RX PB.11

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空輸入

GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB11

//USART 初始化設(shè)置

USART_InitStructure.USART_BaudRate= bound;//一般設(shè)置為9600;

USART_InitStructure.USART_WordLength= USART_WordLength_8b;//字長為8位數(shù)據(jù)格式

USART_InitStructure.USART_StopBits= USART_StopBits_1;//一個停止位

USART_InitStructure.USART_Parity= USART_Parity_No;//無奇偶校驗(yàn)位

USART_InitStructure.USART_HardwareFlowControl= USART_HardwareFlowControl_None;//無硬件數(shù)據(jù)流控制

USART_InitStructure.USART_Mode= USART_Mode_Rx | USART_Mode_Tx; //收發(fā)模式

USART_Init(USART3, &USART_InitStructure); //初始化串口

//Usart3 NVIC 配置

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;//搶占優(yōu)先級3

NVIC_InitStructure.NVIC_IRQChannelSubPriority= 0; //子優(yōu)先級3

NVIC_InitStructure.NVIC_IRQChannelCmd= ENABLE; //IRQ通道使能

NVIC_Init(&NVIC_InitStructure); //根據(jù)指定的參數(shù)初始化VIC寄存器

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//開啟中斷

USART_Cmd(USART3, ENABLE); //使能串口

}

作者: zhang135789 時間: 2017-3-4 09:21
大家可以修改一下

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