main.c

stm32 cortexm－3 adc实例程序

                         RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | 
                         RCC_APB2Periph_AFIO | RCC_APB2Periph_ADC1, ENABLE);
  /* TIM2 clocks enable */  //For LCD display
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);  
}

/*******************************************************************************
* Function Name  : EXTI_Configuration
* Description    : Configures the different EXTI lines.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void EXTI_Configuration(void)
{
  EXTI_InitTypeDef EXTI_InitStructure;

  /* Select the EXTI Line11 the GPIO pin source */
  // Change PE.11 -> PD.11 (JOY_SEL on STM3210B-LK1 board)
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource11);
  /* EXTI line11 configuration -----------------------------------------------*/  
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_Line = EXTI_Line11;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

  /* Select the EXTI Line15 the GPIO pin source */
  // Change PE.15 -> PD.15 (JOY_SEL on STM3210B-LK1 board)
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource15);
  /* EXTI line15 configuration -----------------------------------------------*/  
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_Line = EXTI_Line15;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the different GPIO ports.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure PC.00, PC.01 and PC.04 (ADC Channel10, Channel11 and Channel14)
   as analog input -----------------------------------------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PA.04 (ADC Channel4) as analog input --------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure EXTI line11 ---------------------------------------------------*/
  // Change PE.11 -> PD.11 (JOY_SEL on STM3210B-LK1 board)
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure EXTI line15 ---------------------------------------------------*/
  // Change PE.15 -> PD.15 (JOY_DOWN on STM3210B-LK1 board)
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
  
  // for LCD display
  /* Configure PE.00 -- PE.15 as Output push-pull : SEG0~15 */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOE, &GPIO_InitStructure);

  /* Configure PC.08 -- PC.11 as Output push-pull  : COM1~4 */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configures NVIC and Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

#ifdef  VECT_TAB_RAM  
  /* Set the Vector Table base location at 0x20000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); 
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */ 
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   
#endif

  /* Configure and enable ADC interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  /* enabling interrupt */ // For LCD enable IT from TIM2
  NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
}

/***************************************************************************
* Function Name  : LcdShow_Init
* Description    : Configures TIM2 for LCD display
* Input          : None
* Output         : None
* Return         : None
***************************************************************************/

void LcdShow_Init(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 8000;
  TIM_TimeBaseStructure.TIM_Prescaler = 17;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  TIM_ARRPreloadConfig(TIM2,DISABLE);
  /* only counter overflow/underflow generate U interrupt */
  TIM_UpdateRequestConfig(TIM2,TIM_UpdateSource_Regular);

  /* Output Compare Timing Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
  TIM_OCInitStructure.TIM_Channel = TIM_Channel_1;
  TIM_OCInitStructure.TIM_Pulse = 4000;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInit(TIM2, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);

  /* TIM IT enable */
  TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_Update, ENABLE);

  /* TIM2 enable counter */
  TIM_Cmd(TIM2, ENABLE);
}

/***************************************************************************
* Function Name  : displayconvert
* Description    : convert data to displayable form
* Input          : None
* Output         : None
* Return         : None
***************************************************************************/
void displayconvert(vu16 value)
{
  u8 num1 = value&0xf;
  u8 num2 = (value&0xff)>>4;
  u8 num3= (value&0xfff)>>8;
  u8 num4 = value>>12;
  if (num1>9)
    display[3]=num1+(65-10);
  else
    display[3]=num1+(48-0);

  if (num2>9)
    display[2]=num2+(65-10);
  else
    display[2]=num2+(48-0);

  if (num3>9)
    display[1]=num3+(65-10);
  else
    display[1]=num3+(48-0);

  if (num4>9)
    display[0]=num4+(65-10);
  else
    display[0]=num4+(48-0);
}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert_param error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert_param error line source number
* Output         : None
* Return         : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/