[嵌入式]OpenMV和STM32串口通讯

利用串口进行OpenMV与STM32（其他单片机同理）进行通讯

OpenMV程序，串口发送函数：

from pyb import UART

import struct
def sending_data(x1,y1):
    data =struct.pack("<bbhhb",              #格式为四个字符俩个短整型(2字节)
                   0x2C,                       #帧头1
                   0x12,                       #帧头2
                   int(x1), # up sample by 4    #数据1,低位在前
                   int(y1), # up sample by 4    #数据2
                   )
    uart.write(data);   #必须要传入一个字节数组
    print(data)

单片机解码程序：

extern u8 OpenMV_Rx_BUF[6];

//************串口3************
/*串口3接受OpenMV的数据*/


void uart3_init(u32 bound)
{
   //   PB10 TX  PB11 RX
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE); 
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
 
	//′??ú1??ó|òy???′ó?ó3é?
	GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3); 
	GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3); 
	
	
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; 
	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(GPIOB,&GPIO_InitStructure); 

	USART_InitStructure.USART_BaudRate = bound;
	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(USART3, &USART_InitStructure);
	
	USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

    USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);
	
    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority =2;		
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			
	NVIC_Init(&NVIC_InitStructure);	
	
	USART_Cmd(USART3, ENABLE);
}


void USART3_IRQHandler(void)                	
{
	uint8_t Clear=Clear;
	static uint8_t rebuf[6]={0},i=0;
#if SYSTEM_SUPPORT_OS 		
	OSIntEnter();    
#endif
	if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) 
	{ 
		rebuf[i++] =USART_ReceiveData(USART3);
		   if(rebuf[0]!=0x2c)
			 {
				 i=0;
			 }
			 if((i==2)&&(rebuf[1]!=0x12))
			 {	  
			   i=0;
			 }
		   if(i>=6)
			 {
				 memcpy(OpenMV_Rx_BUF,rebuf,i);
				 i=0;
			 }
  } 
	else if(USART_GetITStatus(USART3,USART_IT_IDLE)!=RESET)
	{
		Clear=USART3->SR;
		Clear=USART3->DR;
	}		
#if SYSTEM_SUPPORT_OS 	//è?1?SYSTEM_SUPPORT_OS?a??￡??òDèòa?§3?OS.
	OSIntExit();  											 
#endif
} 

亲测可行