STM32F0xx_StdPeriph_Examples/TIM/TIM_ADCTrigger/main.c

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/**
  ******************************************************************************
  * @file    TIM/TIM_ADCTrigger/main.c 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

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

/** @addtogroup STM32F0xx_StdPeriph_Examples
  * @{
  */

/** @addtogroup TIM_ADC_Trigger
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define MESSAGE1   "STM32F0xx CortexM0  " 
#ifdef USE_STM320518_EVAL
  #define MESSAGE2   "   STM320518-EVAL   "
#else 
  #define MESSAGE2   "   STM32072B-EVAL   "
#endif /* USE_STM320518_EVAL */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint32_t ADCmvoltp = 0 ;
__IO uint16_t  ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;

/* Private function prototypes -----------------------------------------------*/
static void TIM_Config(void);
static void ADC_Config(void);
static void Display_Init(void);
static void Display(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f0xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f0xx.c file
     */ 

  /* LCD Display init  */
  Display_Init();
  
  /* TIM1 Configuration */  
  TIM_Config();
  
  /* ADC1 Configuration */ 
  ADC_Config();

  /* Infinite loop */
  while (1)
  {
    /* Test EOC flag */
    while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
    
    /* Get ADC1 converted data */
    ADC1ConvertedValue =ADC_GetConversionValue(ADC1);
    
    /* Compute the voltage */
    ADC1ConvertedVoltage = (ADC1ConvertedValue *3300)/0xFFF;
    
    /* Display converted data on the LCD */
    Display();
  }
}

/**
  * @brief  ADC and TIM configuration
  * @param  None
  * @retval None
  */
static void TIM_Config(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef        TIM_OCInitStructure;
  
  /* ADC1 and TIM1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 , ENABLE);
  
  /* TIM1 DeInit */
  TIM_DeInit(TIM1);
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_OCStructInit(&TIM_OCInitStructure); 
  
  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 0xFF;
  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;       
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
  
  /* Output Compare PWM Mode configuration */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; /* low edge by default */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;           
  TIM_OCInitStructure.TIM_Pulse = 0x01;
  TIM_OC4Init(TIM1, &TIM_OCInitStructure);
  
  /* TIM1 enable counter */
  TIM_Cmd(TIM1, ENABLE);
  
  /* Main Output Enable */
  TIM_CtrlPWMOutputs(TIM1, ENABLE);
}

/**
  * @brief  ADC and TIM configuration
  * @param  None
  * @retval None
  */
static void ADC_Config(void)
{
  ADC_InitTypeDef          ADC_InitStructure;
  GPIO_InitTypeDef         GPIO_InitStructure;

  /* GPIOC Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
  
  /* ADC1 and TIM1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  
  /* Configure ADC Channel11 as analog input */
#ifdef USE_STM320518_EVAL
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ; /* Configure ADC Channel11 as analog input */
#else
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ; /* Configure ADC Channel10 as analog input */
#endif /* USE_STM320518_EVAL */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  /* ADC1 DeInit */  
  ADC_DeInit(ADC1);
  
  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStructure);
  
  /* Configure the ADC1 in continous mode withe a resolution equal to 12 bits  */
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; 
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;    
  ADC_InitStructure.ADC_ExternalTrigConv =  ADC_ExternalTrigConv_T1_CC4;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
  ADC_Init(ADC1, &ADC_InitStructure); 
  
  /* Convert the ADC1 Channel11 and channel10 with 239.5 Cycles as sampling time */ 
#ifdef USE_STM320518_EVAL
  ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_239_5Cycles);
#else
  ADC_ChannelConfig(ADC1, ADC_Channel_10 , ADC_SampleTime_239_5Cycles);
#endif /* USE_STM320518_EVAL */
  
  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);
  
  /* Enable the ADC peripheral */
  ADC_Cmd(ADC1, ENABLE);     
  
  /* Wait the ADRDY flag */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY)); 
  
  /* ADC1 regular Software Start Conv */ 
  ADC_StartOfConversion(ADC1);
}

/**
  * @brief  Display ADC converted value on LCD
  * @param  None
  * @retval None
  */
static void Display(void)
{
  uint32_t v=0,mv=0, mvolt = 0;
  uint8_t text[50], voltp = 0;

  v=(ADC1ConvertedVoltage)/1000;
  mv = (ADC1ConvertedVoltage%1000)/100;
  mvolt = (v *100) + (mv*10);

  /* Set the LCD Text size */
  LCD_SetFont(&Font16x24);  

  sprintf((char*)text," Potentiometer=%d,%dV",v,mv);
  
  /* Set the LCD Back Color and Text Color*/
  LCD_SetBackColor(White);
  LCD_SetTextColor(Blue);
  
  LCD_DisplayStringLine(LINE(3),text);
  
  if(ADCmvoltp != mvolt )
  {
    voltp = (uint8_t)((mvolt * 100) / 330);
    sprintf((char*)text,"        %d %         ",voltp);
    LCD_ClearLine(LINE(6));
    LCD_DisplayStringLine(LINE(6),text); 
    /* Set the LCD Text Color */
    LCD_SetTextColor(Black);
    /* Displays a rectangle on the LCD */
    LCD_DrawRect(169, 243, 22, 167 );
    
    
    /* Set the LCD White Color */
    LCD_SetBackColor(White);
    LCD_DrawFullRect(170, 242,  165, 20);
    
    /* Set the LCD Green Color */
    LCD_SetBackColor(Green);

    if( mvolt < 4)
    {
      mvolt = 4;
    }
    
    LCD_DrawFullRect(170, 242, (uint16_t)(mvolt / 2) , 20);

    /* Update the new value */
    ADCmvoltp = mvolt;
  }
}

/**
  * @brief  Display Init (LCD)
  * @param  None
  * @retval None�
  */
static void Display_Init(void)
{
  /* Initialize the LCD */
#ifdef USE_STM320518_EVAL
  STM320518_LCD_Init();
#else
  STM32072B_LCD_Init();
#endif /* USE_STM320518_EVAL */

  /* Clear the LCD */ 
  LCD_Clear(White);

  /* Set the LCD Text size */
  LCD_SetFont(&Font8x12);

  /* Set the LCD Back Color and Text Color*/
  LCD_SetBackColor(Blue);
  LCD_SetTextColor(White);

  /* Display */
  LCD_DisplayStringLine(LINE(0x13), "TIM_ADCTrigger:Potentiometer monitoring");

  /* Set the LCD Text size */
  LCD_SetFont(&Font16x24);

  LCD_DisplayStringLine(LINE(0), MESSAGE1);
  LCD_DisplayStringLine(LINE(1), MESSAGE2);
  
  /* Set the LCD Back Color and Text Color*/
  LCD_SetBackColor(White);
  LCD_SetTextColor(Blue);     
}

#ifdef  USE_FULL_ASSERT

/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t 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 STMicroelectronics *****END OF FILE****/