K210和stm32串口通信(stm32端)_stm32的rx和k210的tx

引言:上次的串口通信说明只附带了K210端,在之前的考虑中一直认为需要用到打包函数，其实根本不用，只用最简单最基本的配置就行了。今天就提供一下STM32端的源码和解释。

正文:

硬件需求:杜邦线，单片机(STM32),K210。只需要将STM32的RX和K210的TX,STM32的TX和K210的RX分别用杜邦线连接。然后STM32和K210共同接GND。

软件:给K210上电,STM32上电之后STM32端代码:

void USART2_Init(u32 bound){ 
    GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
		 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); 
 
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure); 
 
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; 
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	
    GPIO_Init(GPIOA, &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(USART2, &USART_InitStructure); 
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
    USART_Cmd(USART2, ENABLE);                   
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;		
	NVIC_Init(&NVIC_InitStructure);	 
}
void USART2_IRQHandler(void){ 
 
	if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET){  
		USART_ClearITPendingBit(USART2,USART_IT_RXNE);   
		temp =USART_ReceiveData(USART2);
	}
}

这里STM32已经配置好了中断和接受数据！

注意:这里在说一下上一篇的文章，发送的都是字符，比如'4'其实就是字符4，在STM32里还需要进行一下-'0'得到数字(这里不懂就去补C语言ASCII码)。