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USART won't send more than one byte

Question asked by jdcowpland on Dec 12, 2013
Latest reply on Dec 12, 2013 by Clive One
GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
 
  /* Enable GPIO clock */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
     
  /* Enable UART clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
     
  /* Connect PD5 to USART2_Tx*/
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART2);
 
  /* Connect PD6 to USART2_Rx*/
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART2);
     
  /* Configure USART Tx as alternate function  */
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
 
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
 
  /* Configure USART Rx as alternate function  */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  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 configuration */
  USART_Init(USART2, &USART_InitStructure);
     
  /* Enable USART */
  USART_Cmd(USART2, ENABLE);
 
for(i=0;i<4;i++)
   {
   USART_SendData(USART2, 0x24);
   }

I'm trying to send the byte 0x24 three times down my uart, but I'm only seeing it sent once when I look at it on a scope. Anyone know why that might be and if my code looks alright?


Edit: Sorry! Turns out all I needed to do was add in a small time delay after the send and it then worked.

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