openmv与stm32通信
时间: 2023-10-08 15:09:17 浏览: 21
OpenMV和STM32之间的通信可以通过串口实现。以下是一个简单的例子:
1.在OpenMV上设置串口:
import pyb
uart = pyb.UART(3, 9600) # 用串口3,波特率为9600
2.在STM32上设置串口:
#include "stm32f10x.h"
void USART2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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_Init(USART2, &USART_InitStructure);
USART_Cmd(USART2, ENABLE);
}
3.在OpenMV上发送数据:
uart.write("hello STM32!")
4.在STM32上接收数据:
#include "stm32f10x.h"
#include <stdio.h>
int main(void)
{
char data;
USART2_Config(); // 配置串口
while (1)
{
if (USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == SET) // 判断是否收到数据
{
data = USART_ReceiveData(USART2); // 读取数据
printf("%c", data); // 输出数据
}
}
}