设计要点: 1、要是能串口时钟同时要是能复用总线时钟和对应的IO时钟,如:
//使能串口1,PA,AFIO总线 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1 , ENABLE); 2、stm32f10x_conf.h 中使能 #include "stm32f10x_usart.h" #include "misc.h" 3、使能中断的话要配置NVIC,在中断函数中加入相应的程序。 简单的配置例程: - /**************************************************************
- 文件名:USART.c
- 功能:串口初始化配置以及相关函数
- 串口配置注意事项:
- 1、 stm32f10x_conf.h 中使能
- #include "stm32f10x_usart.h"
- #include "misc.h"
- 2、 本文件中定义的串口相关函数需要在头文件中做外部函数声明
- ***************************************************************/
- #include "STM32Lib//stm32f10x.h"
- void USART_Configuration(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- USART_ClockInitTypeDef USART_ClockInitStructure;
-
- //使能串口1,PA,AFIO总线
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |
- RCC_APB2Periph_AFIO |
- RCC_APB2Periph_USART1 ,
- ENABLE);
- /* A9 USART1_Tx */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽输出-TX
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- /* A10 USART1_Rx */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入-RX
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- USART_InitStructure.USART_BaudRate = 9600;
- USART_InitStructure.USART_WordLength = USART_WordLength_8b;
- USART_InitStructure.USART_StopBits = USART_StopBits_1;
- USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
-
- USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
- USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
- USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
- USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
- USART_ClockInit(USART1, &USART_ClockInitStructure);
- USART_Init(USART1, &USART_InitStructure);
- /* Enable the USARTx */
- USART_Cmd(USART1, ENABLE);
- }
- void USART1_Putc(unsigned char c)
- {
- USART_SendData(USART1, c);
- while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET );
- }
- void USART1_Puts(char * str)
- {
- while(*str)
- {
- USART_SendData(USART1, *str++);
- /* Loop until the end of transmission */
- while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
- }
- }
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