/**
  ******************************************************************************
  * @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_ConfigTIM1Base(void);
static void APP_ConfigPWMChannel(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);
  
  /* 3 bits for pre-emption priority, 0 bits for subpriority */
  NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_3);

  /* Configure system clock */
  APP_SystemClockConfig();

  /* Enable TIM1、GPIO clock */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_TIM1);
  LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
  
  /* Configure TIM1 PWM channels and PWM mode */
  APP_ConfigPWMChannel();
  
  /* Configure and enable TIM1 PWM2 mode */
  APP_ConfigTIM1Base();
  

  while (1)
  {
  }
}

/**
  * @brief  Configure TIM1 PWM related GPIO
  * @param  None
  * @retval None
  */
static void APP_ConfigPWMChannel(void)
{
  LL_GPIO_InitTypeDef TIM1CH1MapInit= {0};
  LL_TIM_OC_InitTypeDef TIM_OC_Initstruct ={0};

  /* Configure PA8/PA9/PA10 as TIM1_CH1/TIM1_CH2/TIM1_CH3 */
  TIM1CH1MapInit.Pin        = LL_GPIO_PIN_8|LL_GPIO_PIN_9|LL_GPIO_PIN_10;
  TIM1CH1MapInit.Mode       = LL_GPIO_MODE_ALTERNATE;
  TIM1CH1MapInit.Alternate  = LL_GPIO_AF_6; 
  TIM1CH1MapInit.Speed      = LL_GPIO_SPEED_FREQ_HIGH;
  TIM1CH1MapInit.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
  TIM1CH1MapInit.Pull       = LL_GPIO_PULL_NO;
  LL_GPIO_Init(GPIOA,&TIM1CH1MapInit);
  
  TIM_OC_Initstruct.OCMode        = LL_TIM_OCMODE_PWM2;     /* Mode: PWM1 */
  TIM_OC_Initstruct.OCState       = LL_TIM_OCSTATE_ENABLE;  /* Channel enable */
  TIM_OC_Initstruct.OCNState      = LL_TIM_OCSTATE_DISABLE; /* Complementary channel disable */
  TIM_OC_Initstruct.OCPolarity    = LL_TIM_OCPOLARITY_HIGH; /* Active polarity: high level */
  TIM_OC_Initstruct.OCNPolarity   = LL_TIM_OCPOLARITY_HIGH; /* Compare complementary output polarity: HIGH */
  TIM_OC_Initstruct.OCIdleState   = LL_TIM_OCIDLESTATE_LOW; /* Complementary channel active polarity: high level */
  TIM_OC_Initstruct.OCNIdleState  = LL_TIM_OCIDLESTATE_LOW; /* Complementary output Idle state: LOW */
  /* Channel 1 compare value: 250 */
  TIM_OC_Initstruct.CompareValue  = 250;
  /* Configure channel 1 */
  LL_TIM_OC_Init(TIM1,LL_TIM_CHANNEL_CH1,&TIM_OC_Initstruct);
  /* Channel 2 comparison value:500 */
  TIM_OC_Initstruct.CompareValue  = 500;
  /* Configure channel 2 */
  LL_TIM_OC_Init(TIM1,LL_TIM_CHANNEL_CH2,&TIM_OC_Initstruct);
  /* Channel 3 comparison value:750 */
  TIM_OC_Initstruct.CompareValue  = 750;
  /* Configure channel 3 */
  LL_TIM_OC_Init(TIM1,LL_TIM_CHANNEL_CH3,&TIM_OC_Initstruct);
}

/**
  * @brief  Configure TIM base
  * @param  None
  * @retval None
  */
static void APP_ConfigTIM1Base(void)
{
  /* Configure TIM1 */
  LL_TIM_InitTypeDef TIM1CountInit = {0};
 
  TIM1CountInit.ClockDivision       = LL_TIM_CLOCKDIVISION_DIV1;   /* Clock no divider */
  TIM1CountInit.CounterMode         = LL_TIM_COUNTERMODE_UP;       /* Count mode:up */
  TIM1CountInit.Prescaler           = 1600-1;                      /* prescaler：1600 */
  TIM1CountInit.Autoreload          = 1000-1;                      /* Autoreload value：1000 */
  TIM1CountInit.RepetitionCounter   = 0;                           /* RepetitionCounter value：0 */
  
  /* Initialize TIM1 */
  LL_TIM_Init(TIM1,&TIM1CountInit);
  
  /* Enable output */
  LL_TIM_EnableAllOutputs(TIM1);

  /* 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******************/
