main.c

来自「stm32 lcd 示波器源码」· C语言 代码 · 共 415 行

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V1.0
* Date               : 10/08/2007
* Description        : Main program body
********************************************************************************
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/ 
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
DAC_InitTypeDef            DAC_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
ADC_InitTypeDef           ADC_InitStructure;
ErrorStatus HSEStartUpStatus;
vu16 timerp= 50;
u8 exiflag=0;
u8 onesweepflag=0;
u16 irstate;
u32 advalue;
u16 xstart=0;
u16 flag=1;
u16 y[512];
u16 x=0;
u16 zeropoint[512];
u16 zerok;
u16 zeronum;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void JoyStick_Init(void);
void Interrupts_Config(void);   
void Led_Config(void);
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif

  /* System Clocks Configuration */
  RCC_Configuration();

  /* NVIC Configuration */
  NVIC_Configuration();
  
  /* GPIO Configuration */
  GPIO_Configuration();
  JoyStick_Init();
  Interrupts_Config();
  Led_Config();
  
  
   DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
   DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
   DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits11_0;
   DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
   DAC_Init(DAC_Channel_1, &DAC_InitStructure);
   DAC_Cmd(DAC_Channel_1, ENABLE);
   DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE); 

  
   DAC_Init(DAC_Channel_2, &DAC_InitStructure);
   DAC_Cmd(DAC_Channel_2, ENABLE);
   DAC_SoftwareTriggerCmd(DAC_Channel_2, ENABLE); 

  /* Time base configuration */
   TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Period = timerp;       // 10kHz=1Mhz / 100   
  TIM_TimeBaseStructure.TIM_Prescaler =9;      // 36MHz/(35+1)  
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);  //开启定时器事件中断
  TIM_Cmd(TIM2, ENABLE);     //启动定时器
  
    /* ADC1 configuration ------------------------------------------------------*/
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = DISABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 1, ADC_SampleTime_55Cycles5);
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);
  /* Enable ADC1 reset calibaration register */   
  ADC_ResetCalibration(ADC1);
  /* Check the end of ADC1 reset calibration register */
  while(ADC_GetResetCalibrationStatus(ADC1));
  /* Start ADC1 calibaration */
  ADC_StartCalibration(ADC1);
  /* Check the end of ADC1 calibration */
  while(ADC_GetCalibrationStatus(ADC1));
  /* Start ADC1 conversion */ 
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);

  while (1)
  {
    
    if (exiflag==1)                           //按键按下产生外部中断
    {
    TIM_Cmd(TIM2, DISABLE);
  /* Time base configuration */
   TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Period = timerp;       // 10kHz=1Mhz / 100   
  TIM_TimeBaseStructure.TIM_Prescaler = 9;      // 36MHz/(35+1)  
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);  //开启定时器事件中断
  TIM_Cmd(TIM2, ENABLE);     //启动定时器
      exiflag=0;
    }
   /*   
   if (onesweepflag==1)                     //一次采样y【512】点完成
    { 
      zerok=0;
     // TIM_Cmd(TIM2, DISABLE);
      
      for (x=0;x<512;x++)
      {  
        if ((y[x]<2048&&y[x+1]>2048)||(y[x]==2048)||(y[x+1]==2048))
        {
          
          zeropoint[zerok]=x;
          zerok++;
          if (zeropoint[zerok]-zeropoint[zerok-1]<3) {zerok--;}
        }
  
      }
      zeronum=zerok; 
    
      if ((zeropoint[1]!=1)&&(zeropoint[5]!=511))
      {  
        timerp=timerp+1;
        TIM_Cmd(TIM2, DISABLE);

   TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Period = timerp;       // 10kHz=1Mhz / 100   
  TIM_TimeBaseStructure.TIM_Prescaler = 2;      // 36MHz/(35+1)  
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);  //开启定时器事件中断
  TIM_Cmd(TIM2, ENABLE);     //启动定时器
       }
      
      
     // onesweepflag=0;
    //  TIM_Cmd(TIM2, ENABLE);     //启动定时器
    }
    
    */
    
    
  }  
}

/*******************************************************************************
* Function Name  : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{   
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();

  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
 
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

    /* PCLK1 = HCLK/4 */
    RCC_PCLK1Config(RCC_HCLK_Div4);

    /* PLLCLK = 8MHz * 9 = 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

    /* Enable PLL */ 
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }


  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);     //启动TIM2时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);    //启动GPIOA时钟
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);      //启动DAC时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);     //启动ADC1时钟
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configure the TIM2 Pins.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
  /* Configure PC.04 (ADC Channel14) as analog input -------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;            //ADC的输入脚GPIOC.4
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
 
 //DAC_CH4--> PA4 ,PA5 为DA输出端
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5; 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name  : JoyStick_Init
* Description    : keys for 5 direction of joystick
* Input          : None.
* Return         : None.
*******************************************************************************/
void JoyStick_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  EXTI_InitTypeDef EXTI_InitStructure;
  
   /* Enable Joystick GPIOs clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure the JoyStick IOs */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
  
  EXTI_ClearITPendingBit(EXTI_Line11);
  EXTI_ClearITPendingBit(EXTI_Line12);
  EXTI_ClearITPendingBit(EXTI_Line13);
  EXTI_ClearITPendingBit(EXTI_Line14);
  EXTI_ClearITPendingBit(EXTI_Line15);
  
  /* for 5 direction of joystick----------------------------------------------*/
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource11);
  EXTI_InitStructure.EXTI_Line = EXTI_Line11;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
  
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource12);
  EXTI_InitStructure.EXTI_Line = EXTI_Line12;
  EXTI_Init(&EXTI_InitStructure);
 
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource13);
  EXTI_InitStructure.EXTI_Line = EXTI_Line13;
  EXTI_Init(&EXTI_InitStructure);
  
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource14);
  EXTI_InitStructure.EXTI_Line = EXTI_Line14;
  EXTI_Init(&EXTI_InitStructure);
  
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource15);
  EXTI_InitStructure.EXTI_Line = EXTI_Line15;
  EXTI_Init(&EXTI_InitStructure);
}

void Interrupts_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);


  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  /* Enable the EXTI11~15 Interrupt on PB.11 */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  

}


void Led_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable USB_LED_PORT clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF, ENABLE);

  /* Configure USB_LED_PORT pin6, pin7, pin8 and pin9 as output push-pull */
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOF, &GPIO_InitStructure);
}


/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configure the nested vectored interrupt controller.
* 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
 
  /* Enable the TIM2 global Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;  
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

#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) */

  while (1)
  {
  }	
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/