/**
  ******************************************************************************
  * @file    main.c
  * @author  MCU Application Team
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "py32e407xx_ll_Start_Kit.h"

/* Private define ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static void APP_ConfigTIM1Slave(void);
static void APP_ConfigTIM3Master(void);

/**
  * @brief  Main program.
  * @param  None
  * @retval int
  */
int main(void)
{
  /* Enable SYSCFG and PWR clock */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);

  /* Enable TIM1,TIM3 clock */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_TIM1);
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM3);
  
  /* 3 bits for pre-emption priority, 0 bits for subpriority */
  NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_3);

  /* Configure system clock */
  APP_SystemClockConfig();

  /* Initialize LED */
  BSP_LED_Init(LED_GREEN);

  /* Initialize BUTTON */
  BSP_PB_Init(BUTTON_KEY,BUTTON_MODE_GPIO);

  /* Initialize UART (for printf use) */
  BSP_UART_Config();

  /* Enable TIM1 */
  APP_ConfigTIM1Slave();
  
  /* Enable TIM3 */
  APP_ConfigTIM3Master();

  while (1)
  {
    printf("TIM1Count:%u\r\n",(unsigned int)LL_TIM_GetCounter(TIM1));
    LL_mDelay(100);
  }
}


/**
  * @brief  Configure TIM3 as Master
  * @param  None
  * @retval None
  */
static void APP_ConfigTIM3Master(void)
{
  /* prescaler：16000 */
  LL_TIM_SetPrescaler(TIM3,16000-1);
  
  /* Counting mode: Up counting */
  LL_TIM_SetCounterMode(TIM3,LL_TIM_COUNTERMODE_UP);
  
  /* Auto-reload value : 1000-1 */
  LL_TIM_SetAutoReload(TIM3,1000-1);
  
  /* Clock no divider */
  LL_TIM_SetClockDivision(TIM3,LL_TIM_CLOCKDIVISION_DIV1);
  
  /* Set trigger output as UPDATE event */
  LL_TIM_SetTriggerOutput(TIM3,LL_TIM_TRGO_UPDATE);
  
  /* Enable TIM3 counter */
  LL_TIM_EnableCounter(TIM3);
}

/**
  * @brief  Configure TIM1 as Slave
  * @param  None
  * @retval None
  */
static void APP_ConfigTIM1Slave(void)
{
  /* Counting mode: Up counting */
  LL_TIM_SetCounterMode(TIM1,LL_TIM_COUNTERMODE_UP);
  
  /* Autoreload value：10 */
  LL_TIM_SetAutoReload(TIM1,10);
  
  /* Set trigger input as TIM3 */
  LL_TIM_SetTriggerInput(TIM1,LL_TIM_TS_ITR2);
  
  /* Set external clock mode 1 */
  LL_TIM_SetClockSource(TIM1,LL_TIM_CLOCKSOURCE_EXT_MODE1);
  
  /* Enable TIM1 */
  LL_TIM_EnableCounter(TIM1);
}

/**
  * @brief  Configure system clock
  * @param  None
  * @retval None
  */
static void APP_SystemClockConfig(void)
{
  /* Enable HSI */
  LL_RCC_HSI_Enable();
  while(LL_RCC_HSI_IsReady() != 1)
  {
  }

  /* Set AHB prescaler: HCLK = SYSCLK */
  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);

  /* Select HSI as system clock source */
  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSI);
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
  {
  }

  /* Set APB1 & APB2 prescaler: PCLK1 = HCLK, PCLK2 = 1/2*HCLK */
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
  LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_2);
  
  /* Set systick to 1ms in using frequency set to 16MHz */
  LL_Init1msTick(16000000);

  /* Update the SystemCoreClock global variable(which can be updated also through SystemCoreClockUpdate function) */
  LL_SetSystemCoreClock(16000000);
}

/**
  * @brief  Error handling function
  * @param  None
  * @retval None
  */
void APP_ErrorHandler(void)
{
  /* Infinite loop */
  while (1)
  {
  }
}

#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 /* USE_FULL_ASSERT */

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