/**
******************************************************************************
* File Name          : main.c
* Date               : 05/12/2014 20:22:28
* Description        : Main program body
******************************************************************************
*
* COPYRIGHT(c) 2014 STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*   1. Redistributions of source code must retain the above copyright notice,
*      this list of conditions and the following disclaimer.
*   2. Redistributions in binary form must reproduce the above copyright notice,
*      this list of conditions and the following disclaimer in the documentation
*      and/or other materials provided with the distribution.
*   3. Neither the name of STMicroelectronics nor the names of its contributors
*      may be used to endorse or promote products derived from this software
*      without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"
#include "usb_device.h"

/* USER CODE BEGIN Includes */
#include "usbd_cdc_if.h"
#include "can.h"
#include "slcan.h"

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void led_init(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

volatile int i=0;
int main(void)
{

    /* USER CODE BEGIN 1 */

    /* USER CODE END 1 */

    /* MCU Configuration----------------------------------------------------------*/

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();

    /* Configure the system clock */
    SystemClock_Config();

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    can_init();
    led_init();
    MX_USB_DEVICE_Init();

    /* USER CODE END 2 */

    /* USER CODE BEGIN 3 */


    // turn on green LED
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);

    // blink red LED for test
    uint32_t count;
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
    for (count=0; count < 200000; count++) { __asm("nop");}
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);

    // loop forever
    CanRxMsgTypeDef rx_msg;
    uint32_t status;
    uint8_t msg_buf[SLCAN_MTU];

    for (;;) {
	while (!is_can_msg_pending());
	status = can_rx(&rx_msg, 3);
	if (status == HAL_OK) {
	    status = slcan_parse_frame(&msg_buf, &rx_msg);
	    CDC_Transmit_FS(msg_buf, status);
	}
    }

    /* USER CODE END 3 */
}

/** System Clock Configuration
 */

void SystemClock_Config(void)
{

    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
    RCC_PeriphCLKInitTypeDef PeriphClkInit;

    // set up the oscillators
    // use external oscillator (16 MHz), enable 3x PLL (48 MHz)
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL3;
    RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
    HAL_RCC_OscConfig(&RCC_OscInitStruct);

    // set sysclk, hclk, and pclk1 source to PLL (48 MHz)
    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;
    HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);

    // set USB clock source to PLL (48 MHz)
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
    PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLLCLK;
    HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);

    __SYSCFG_CLK_ENABLE();

}

/** Configure pins as
 * Analog
 * Input
 * Output
 * EVENT_OUT
 * EXTI
 */
void MX_GPIO_Init(void)
{

    /* GPIO Ports Clock Enable */
    __GPIOF_CLK_ENABLE();
    __GPIOA_CLK_ENABLE();
    __GPIOB_CLK_ENABLE();
}

/* USER CODE BEGIN 4 */
static void led_init() {
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
    GPIO_InitStruct.Alternate = 0;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
/* USER CODE END 4 */

#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 CODE BEGIN 6 */
    /* 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) */
    /* USER CODE END 6 */

}

#endif

/**
 * @}
 */

/**
 * @}
 */

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