分别生成一个stm32f407zgt6与openmv串口通信的代码

STM32F407ZGT6与OpenMV串口通信的代码如下：

STM32F407ZGT6串口通信代码：

#include "stm32f4xx.h"
#include <stdio.h>
#include <string.h>

#define UART_TX GPIO_Pin_9
#define UART_RX GPIO_Pin_10

void USART2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = UART_TX | UART_RX;
    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);

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);

    USART_InitStructure.USART_BaudRate = 115200;
    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_Init(USART2, &USART_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

    USART_Cmd(USART2, ENABLE);
}

void USART2_SendChar(uint8_t ch)
{
    while (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET)
        ;
    USART_SendData(USART2, ch);
}

void USART2_SendString(char *str)
{
    while (*str != '\0')
    {
        USART2_SendChar(*str);
        str++;
    }
}

void USART2_IRQHandler(void)
{
    if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        uint8_t data = USART_ReceiveData(USART2);
        USART2_SendChar(data);
    }
}

int main(void)
{
    USART2_Init();

    while (1)
    {
        // 代码逻辑
    }
}

OpenMV串口通信代码：

import sensor, image, time, pyb

uart = pyb.UART(3, 115200, timeout_char=1000)

while(True):
    # 代码逻辑
    uart.write("Hello World!\n")
    pyb.delay(1000)

其中，STM32F407ZGT6串口通信代码使用USART2进行通信，波特率为115200。OpenMV串口通信代码使用UART3进行通信，波特率也为115200。每次循环都会向对方发送一条字符串，并延时1秒。