USART application DELAY error on STM32F4

Posted on May 06, 2015 at 21:33

I have develop an app and one button is sending the string A. However when i connect the STM32F407 and run the program it only can execute one command line instead of all command under the char A. Is there anyway to tackle this problem? I KNOW IT IS RELATED TO DELAY PROBLEM. BUT HOW CAN I SOLVE IT BY PROGRAMMING? THANKS!!!

&sharpinclude ''stm32f4xx.h''

&sharpinclude ''usart_config.h''

&sharpinclude ''String.h''

&sharpinclude ''config.h''

&sharpinclude ''delay.h''

void usart_lowLevelInit(){

  GPIO_InitTypeDef GPIO_InitStructure;

 

  /**************************GPIO Configuration*****************************/

   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

   RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

   

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOC, &GPIO_InitStructure);

 

  /* Connect USART pins to AF */

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_USART3);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_USART3);

  //*************************USARTx configuration *****************************

  USART_InitTypeDef USART_InitStructure;

 

  /* USARTx configuration -------------------------------/

  / * USARTx configured as follow:

        - BaudRate = 9600 baud

        - Word Length = 8 Bits

        - Two Stop Bit

        - Odd parity

        - Hardware flow control disabled (RTS and CTS signals)

        - Receive and transmit enabled

  */

  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(USART3, &USART_InitStructure);

 

  USART_Cmd(USART3, ENABLE);

 /*USART_ITConfig(USART3, USART_IT_TC, ENABLE);*/

  USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

  //***************************Interruption Config***********************************

  NVIC_InitTypeDef NVIC_InitStructure;

 

  /* Configure the NVIC Preemption Priority Bits */

  

  //NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

 

  /* Enable the USART3 Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

 }

//------------------Fonction de Reception ---------------------------------

extern __IO uint8_t cursor,flag;

extern __IO char buffer[20],result[20];

extern __IO char c;

void usart_receive(char c)

{

  

  if (c=='A')

  {

    

 

 

 moteur2(1550);

  delay_nms(100);

  moteur17(1500);

  delay_nms(100) ;

 moteur3(2150);

 delay_nms(100) ;

 moteur18(1300);

  delay_nms(100) ;

  moteur2(1750);

    delay_nms(100);

  moteur17(1200);

  

  

 delay_nms(100) ;

  moteur8(1200);

  delay_nms(100);

  moteur11(1600);

   delay_nms(100) ;

 moteur12(500);

 delay_nms(100) ;

 moteur9(1400);

 delay_nms(100);

  moteur8(1500);

    delay_nms(100);

   moteur11(1300);

   

 

 delay_nms(100) ;

  moteur5(1500);

delay_nms(100);

  moteur14(2100);

  delay_nms(100);

 moteur15(1000);

 delay_nms(100) ;

 moteur6(1100);

 delay_nms(100) ;

   moteur5(1800);

    delay_nms(100);

  moteur14(1800);

  delay_nms(100);

 

 moteur3(1850);

 moteur18(1600);

 moteur12(900);

 moteur9(1000);

 moteur15(1400);

 moteur6(700);

  }

   else if (c=='B')

   {

    moteur2(1550);

  delay_nms(100);

  moteur17(1500);

  delay_nms(100) ;

 moteur3(1650);

 delay_nms(100) ;

 moteur18(1700);

  delay_nms(100) ;

  moteur2(1750);

delay_nms(100);

  moteur17(1200);

  

  

 delay_nms(100) ;

  moteur8(1200);

  delay_nms(100);

  moteur11(1600);

   delay_nms(100) ;

 moteur12(1200);

 delay_nms(100);

 moteur9(700);

 delay_nms(100);

  moteur8(1500);

    delay_nms(100);

   moteur11(1300);

   

 

 delay_nms(100) ;

  moteur5(1500);

delay_nms(100);

  moteur14(2100);

  delay_nms(100);

 moteur15(1800);

 delay_nms(100) ;

 moteur6(300);

 delay_nms(100) ;

   moteur5(1800);

    delay_nms(100);

  moteur14(1800);

  delay_nms(100);

 

 moteur3(1850);

 moteur18(1600);

 moteur12(900);

 moteur9(1000);

 moteur15(1400);

 moteur6(700);}

  }

  

/*----------Dans Le Fichier stm32f4xx_it on ajoute----------------

extern char c;

extern __IO uint8_t cursor;

extern __IO char buffer[64],result[64];

void USART3_IRQHandler(void){

    c= (char)USART_ReceiveData( USART3);

usart_receive(c);} */

//------------------Dans Le fichier Main----------------------------

 //usart_lowLevelInit()

//if (flag==0) flag=1;

//&sharpinclude ''usart_config.h''  

#stm32 #stm32f4 #usart