USART Rx problem

Posted on February 13, 2012 at 20:16

Hello,

I have a little problem with Rx on stm32f417.

I designed my own board, byt i am putting this here, becouse i cannot find another approperiate forum.

I tried to set up UART2, but i cannot make reciving working.

HW is OK, i tested that.

void USART_Inicializace(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitTypeDef GPIO_InitStructure2;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);  // 1.

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD,ENABLE); // 2.

GPIO_PinAFConfig  ( GPIOD, GPIO_PinSource5 , GPIO_AF_USART2) ;

GPIO_PinAFConfig  ( GPIOD, GPIO_PinSource6 , GPIO_AF_USART2) ;  

//  

//   //  Tx

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; // alternate function!

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP ;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

////

//   // Rx

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;

  GPIO_Init(GPIOD, &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);

// jeste zbyva konfigurace preruseni

// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

//

//   NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

//   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

//   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

//   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

//   NVIC_Init(&NVIC_InitStructure);

// USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

}

Thank you.