stm32f1精英板和openmv串口通信源码

下面是一个简单的示例代码，演示了如何在STM32F1精英板和OpenMV之间进行串口通信：

在STM32F1精英板上，使用USART1作为串口通信的接口。首先，需要配置USART1，设置波特率和其他相关参数。然后，使用USART1发送和接收数据。

#include "stm32f10x.h"

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    USART_InitTypeDef USART_InitStruct;
    
    // Enable GPIOA clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    // Enable USART1 clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    
    // Configure USART1 Tx (PA9) as alternate function push-pull
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStruct);
    
    // Configure USART1 Rx (PA10) as input floating
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStruct);
    
    // Configure USART1
    USART_InitStruct.USART_BaudRate = 115200;
    USART_InitStruct.USART_WordLength = USART_WordLength_8b;
    USART_InitStruct.USART_StopBits = USART_StopBits_1;
    USART_InitStruct.USART_Parity = USART_Parity_No;
    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStruct);
    
    // Enable USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendChar(char ch)
{
    // Wait until transmit data register is empty
    while (!(USART1->SR & USART_SR_TXE));
    // Send a character
    USART1->DR = ch;
}

char USART1_ReceiveChar(void)
{
    // Wait until data is received
    while (!(USART1->SR & USART_SR_RXNE));
    // Read received data
    return USART1->DR;
}

int main(void)
{
    char rxData;
    
    USART1_Init();
    
    while (1)
    {
        // Receive data from OpenMV
        rxData = USART1_ReceiveChar();
        
        // Process received data
        
        // Send data to OpenMV
        USART1_SendChar('A');
    }
}

在OpenMV上，使用UART3作为串口通信的接口。首先，需要配置UART3，设置波特率和其他相关参数。然后，使用uart.write()函数发送数据，使用uart.readchar()函数接收数据。

import sensor, image, time, pyb

# Enable UART3 (UART3_RX: PB11, UART3_TX: PB10)
uart = pyb.UART(3, 115200)

while(True):
    # Send data to STM32F1
    uart.write("Hello!")

    # Receive data from STM32F1
    rxData = uart.readchar()

    # Process received data

    time.sleep(1000)

这只是一个简单的示例，实际应用中可能需要根据具体需求进行更复杂的通信协议设计和数据处理。希望对你有所帮助！