Upon request I’m posting this USART example code for the STM32F4 which
initializes USART2 and constantly sends the character ‘h’.
#include <stm32f4xx.h>
#include <stm32f4xx_usart.h>
void init_usart(void){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* enable peripheral clock for USART2 */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
/* GPIOA clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
/* GPIOA Configuration: USART2 TX on PA2 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Connect USART2 pins to AF2 */
// TX = PA2
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
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_Tx;
USART_Init(USART2, &USART_InitStructure);
USART_Cmd(USART2, ENABLE); // enable USART2
}
void Delay(__IO uint32_t nCount)
{
while(nCount--)
{
}
}
int main(void){
init_usart();
uart_puts("Init complete!");
while(1){
USART_SendData(USART2, 'h'); // defined in stm32f4xx_usart.h
Delay(0x3FFFFF);
}
}
I hope that is helpful .
I want to read GPS sensor using stm32f4.can you please help me.
RépondreSupprimerhi tried your code for STM32F429ZI USART2 PA2 and PA3
RépondreSupprimerand i am facing one error , could you please help me to find solution.
../Core/Src/main.c(2): error: #5: cannot open source input file "stm32f4xx_usart.h": No such file or directory