STM32F407 디스커버리 보드 UART4

Question

나는 keil을 사용 중이며 STM32f407 보드에서 데이터 쓰루 UART4를 보내려고했지만 USART_SendData() 함수를 사용할 때 TX 핀 (PC10)에서 아무 것도 얻을 수 없었다. 이 핀에) 여기에 내 초기화가 있습니다 :

GPIO_InitTypeDef GPIO_InitStructure; 
USART_InitTypeDef USART_InitStructure; 
NVIC_InitTypeDef NVIC_InitStructure; 

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); 

//UART4_TX PC.10 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; 
GPIO_Init(GPIOC, &GPIO_InitStructure); 

//USART3_RX PB.11 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 
GPIO_Init(GPIOC, &GPIO_InitStructure); 

GPIO_PinAFConfig(GPIOC, GPIO_Pin_10, GPIO_AF_UART4); 
GPIO_PinAFConfig(GPIOC, GPIO_Pin_11, GPIO_AF_UART4); 

//Usart1 NVIC 

NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn; 
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ; 
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
NVIC_Init(&NVIC_InitStructure); 

USART_InitStructure.USART_BaudRate = Baud; 
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(UART4, &USART_InitStructure); 
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE); 
USART_Cmd(UART4, ENABLE); 

나는이 코드에서 뭔가를 놓쳤습니까? P.S : Printf() 함수를 사용할 때 프로그램이 멈 춥니 다.

Answer 1

해결! 새 초기화 :

GPIO_InitTypeDef GPIO_InitStructure; 
USART_InitTypeDef USART_InitStructure; 
NVIC_InitTypeDef NVIC_InitStructure; 

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); 
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); 


//UART4_TX PC.10 PC.11 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; 
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; 
GPIO_Init(GPIOC, &GPIO_InitStructure); 


    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_UART4); 
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_UART4); 

//Usart1 NVIC 

NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn; 
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ; 
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
NVIC_Init(&NVIC_InitStructure); 

USART_InitStructure.USART_BaudRate = Baud; 
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(UART4, &USART_InitStructure); 
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE); 
USART_Cmd(UART4, ENABLE);