/**
  ******************************************************************************
  * @file    Demonstrations/Gravitech_4Digits_Counter/Src/main.c 
  * @author  MCD Application Team
  * @brief   This demo describes how to display 4 digits using the Gravitech 
             7 Segment Display for Arduino Nano shield mounted on the 
             STM32 Nucleo board.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */

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

/** @addtogroup STM32F3xx_HAL_Demonstrations
  * @{
  */

/** @addtogroup Demo
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  uint32_t counter = 0;
  
  /* STM32F3xx HAL library initialization:
       - Configure the Flash prefetch
       - Configure the Systick to generate an interrupt each 1 msec
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  HAL_Init();
  
  /* Configure the system clock = 48 MHz */
  SystemClock_Config();

  /* Initialize the LED present on the Nucleo 32 Board */
  BSP_LED_Init(LED3);
  
  /* Initialize the Gravitech 4 digits 7 segments nano shield */
  if(BSP_DIGIT4_SEG7_Init() != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }
  
  /* Infinite loop */
  while(1)
  {
    /* Stop the demonstration on 3232! */
    if(counter == 3232)
    {
      while(1)
      {
        /* Display the counter on the screen */
        if(BSP_DIGIT4_SEG7_Display(3232) != HAL_OK)
        {
          /* Communication Error */
          Error_Handler();
        }
        
        /* Add some delay */
        HAL_Delay(200);
        
        /* Display the counter on the screen */
        if(BSP_DIGIT4_SEG7_Display(DIGIT4_SEG7_RESET) != HAL_OK)
        {
          /* Communication Error */
          Error_Handler();
        }       
        
        /* Add some delay */
        HAL_Delay(50); 
      }
    }
    
    /* Display the counter on the screen */
    if(BSP_DIGIT4_SEG7_Display(counter++ % 10000) != HAL_OK)
    {
      /* Communication Error */
      Error_Handler();
    }
    
    /* Add some delay */
    HAL_Delay(5);
  }
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSI)
  *            SYSCLK(Hz)                     = 48000000
  *            HCLK(Hz)                       = 48000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 1
  *            APB2 Prescaler                 = 1
  *            PLLMUL                         = RCC_PLL_MUL12 (12)
  *            Flash Latency(WS)              = 2
  * @param  None
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  
  /* HSI Oscillator already ON after system reset, activate PLL with HSI as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
  {
    /* Initialization Error */
    while(1); 
  }

  /* Select PLL as system clock source and configure the HCLK, PCLK1
     clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;  
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1)!= HAL_OK)
  {
    /* Initialization Error */
    while(1); 
  }
}
/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* Configure LED3 */
  BSP_LED_Init(LED3);

  while (1)
  {
    /* Toggle LED3 with a period of one second */
    BSP_LED_Toggle(LED3);
    HAL_Delay(1000);
  }
}

/**
  * @}
  */

/**
  * @}
  */

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