STM32f103系列 PC11 RX USART3 问题

菜鸟Tony

已于 2024-05-18 10:36:42 修改

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文章标签： stm32 单片机嵌入式硬件

于 2024-05-18 10:31:42 首次发布

本文链接：https://blog.youkuaiyun.com/qq_44027883/article/details/139021282

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STM32f103系列 PC11 RX USART3 问题

楼主最近使用f103rct6进行开发的时候，想使用PC10，PC11（对应USART3）进行USART通信，但是PC10正常发送，PC11无法正常接收。
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省流版解决方案

GPIO口正常配置GPIOC
USART配置正常配置USART3
加上端口部分重映射

GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(BLUETOOTH_USART_GPIO_CLK, ENABLE);
	RCC_APB1PeriphClockCmd(BLUETOOTH_USART_CLK, ENABLE);
	**GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);**
	//BLUETOOTH_USART_GPIO_CLK 			RCC_APB2Periph_GPIOC
	//BLUETOOTH_USART_CLK				RCC_APB1Periph_USART3

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完整代码模块

//.h file
#define  BLUETOOTH_USARTx                   USART3
#define  BLUETOOTH_USART_CLK                RCC_APB1Periph_USART3
#define  BLUETOOTH_USART_APBxClkCmd         RCC_APB1PeriphClockCmd
#define  BLUETOOTH_USART_BAUDRATE           115200

// USART GPIO 
#define  BLUETOOTH_USART_GPIO_CLK           (RCC_APB2Periph_GPIOC)
#define  BLUETOOTH_USART_GPIO_APBxClkCmd    RCC_APB2PeriphClockCmd
    
#define  BLUETOOTH_USART_TX_GPIO_PORT       GPIOC   
#define  BLUETOOTH_USART_TX_GPIO_PIN        GPIO_Pin_10
#define  BLUETOOTH_USART_RX_GPIO_PORT       GPIOC
#define  BLUETOOTH_USART_RX_GPIO_PIN        GPIO_Pin_11

#define  BLUETOOTH_USART_IRQ                USART3_IRQn
#define  BLUETOOTH_USART_IRQHandler         USART3_IRQHandler

void DEBUG_USART_Init(void);
void BLUETOOTH_USART_Init(void);
void LIDAR_USART_Init(void);
void Usart_SendByte(uint8_t Byte);
void Usart_SendArray(uint8_t *Array, uint16_t Length);

void Usart_SendPacket(void);
uint8_t Usart_GetRxFlag(void);

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

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(BLUETOOTH_USART_GPIO_CLK, ENABLE);
	RCC_APB1PeriphClockCmd(BLUETOOTH_USART_CLK, ENABLE);
	GPIO_PinRemapConfig(GPIO_PartialRemap_USART3,ENABLE);

	GPIO_InitStructure.GPIO_Pin = BLUETOOTH_USART_TX_GPIO_PIN;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(BLUETOOTH_USART_TX_GPIO_PORT, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = BLUETOOTH_USART_RX_GPIO_PIN;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(BLUETOOTH_USART_RX_GPIO_PORT, &GPIO_InitStructure);	


	NVIC_InitStructure.NVIC_IRQChannel = BLUETOOTH_USART_IRQ;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);



	USART_InitStructure.USART_BaudRate = BLUETOOTH_USART_BAUDRATE;
	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(BLUETOOTH_USARTx, &USART_InitStructure);
	USART_ITConfig(BLUETOOTH_USARTx, USART_IT_RXNE, ENABLE);	
	USART_Cmd(BLUETOOTH_USARTx, ENABLE);	    
}