/**
  ******************************************************************************
  * @file    USB_Device/HID_Standalone/Src/main.c 
  * @author  MCD Application Team
  * @brief   USB device HID application main file.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */

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

/** @addtogroup STM32F1xx_HAL_Validation
  * @{
  */

/** @addtogroup STANDARD_CHECK
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define CURSOR_STEP     5

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
USBD_HandleTypeDef USBD_Device;
uint8_t HID_Buffer[4];

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void Error_Handler(void);
static void GetPointerData(uint8_t *pbuf);

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

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
  
  /* Configure the system clock to 72 MHz */
  SystemClock_Config();
  
  /* Initialize LED2 */
  BSP_LED_Init(LED2);
  
  /* Configure Key button for remote wakeup */
  BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);

  /* Init Device Library */
  USBD_Init(&USBD_Device, &HID_Desc, 0);

  /* Register the HID class */
  USBD_RegisterClass(&USBD_Device, USBD_HID_CLASS);

  /* Start Device Process */
  USBD_Start(&USBD_Device);

  while (1)
  {
    /* Insert delay 100 ms */
    HAL_Delay(100);  
    BSP_LED_Toggle(LED2);
    HAL_Delay(100);  
    GetPointerData(HID_Buffer);
    USBD_HID_SendReport(&USBD_Device, HID_Buffer, 4);
  }
}

/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 72000000
  *            HCLK(Hz)                       = 72000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 2
  *            APB2 Prescaler                 = 1
  *            HSE Frequency(Hz)              = 8000000
  *            HSE PREDIV1                    = 1
  *            PLLMUL                         = 9
  *            Flash Latency(WS)              = 2
  * @param  None
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef clkinitstruct = {0};
  RCC_OscInitTypeDef oscinitstruct = {0};
  RCC_PeriphCLKInitTypeDef rccperiphclkinit = {0};
  
  /* Enable HSE Oscillator and activate PLL with HSE as source */
  oscinitstruct.OscillatorType  = RCC_OSCILLATORTYPE_HSE;
  oscinitstruct.HSEState        = RCC_HSE_ON;
  oscinitstruct.HSEPredivValue  = RCC_HSE_PREDIV_DIV1;
  oscinitstruct.PLL.PLLMUL      = RCC_PLL_MUL9;
    
  oscinitstruct.PLL.PLLState    = RCC_PLL_ON;
  oscinitstruct.PLL.PLLSource   = RCC_PLLSOURCE_HSE;
  
  if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
  {
    /* Start Conversation Error */
    Error_Handler(); 
  }
  
  /* USB clock selection */
  rccperiphclkinit.PeriphClockSelection = RCC_PERIPHCLK_USB;
  rccperiphclkinit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
  HAL_RCCEx_PeriphCLKConfig(&rccperiphclkinit);
  
  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 
  clocks dividers */
  clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;  
  clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
  {
    /* Start Conversation Error */
    Error_Handler(); 
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
static void Error_Handler(void)
{
  BSP_LED_On(LED2);
  while (1)
  {
  }
}

/**
  * @brief  Gets Pointer Data.
  * @param  pbuf: Pointer to report
  * @retval None
  */
static void GetPointerData(uint8_t *pbuf)
{
  static int8_t cnt = 0;
  int8_t  x = 0, y = 0 ;
  
  if(cnt++ > 0)
  {
    x = CURSOR_STEP;
  }
  else
  {
    x = -CURSOR_STEP;
  }
  
  pbuf[0] = 0;
  pbuf[1] = x;
  pbuf[2] = y;
  pbuf[3] = 0;
}

#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

/**
  * @}
  */

/**
  * @}
  */