/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS 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,
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "main.h"

/** @addtogroup TIM_6Steps
 * @{
 */

TIM_TimeBaseInitType TIM_TimeBaseStructure;
OCInitType TIM_OCInitStructure;
TIM_BDTRInitType TIM_BDTRInitStructure;
uint16_t CCR1_Val = 32767;
uint16_t CCR2_Val = 24575;
uint16_t CCR3_Val = 16383;
uint16_t CCR4_Val = 8191;

void RCC_Configuration(void);
void GPIO_Configuration(void);
void SysTick_Configuration(void);
void NVIC_Configuration(void);

/**
 * @brief   Main program
 */
int main(void)
{
    /* System Clocks Configuration */
    RCC_Configuration();

    /* NVIC Configuration */
    NVIC_Configuration();

    /* GPIO Configuration */
    GPIO_Configuration();

    /* SysTick Configuration */
    SysTick_Configuration();

    /*-----------------------------------------------------------------------------
    The n32g4fr TIM1 peripheral offers the possibility to program in advance the
    configuration for the next TIM1 outputs behaviour (step) and change the configuration
    of all the channels at the same time. This operation is possible when the COM
    (commutation) event is used.
    The COM event can be generated by software by setting the COM bit in the TIM1_EGR
    register or by hardware (on TRC rising edge).
    In this example, a software COM event is generated each 100 ms: using the Systick
    interrupt.
    The TIM1 is configured in Timing Mode, each time a COM event occurs,
    a new TIM1 configuration will be set in advance.
    The following Table  describes the TIM1 Channels states:
              -----------------------------------------------
             | Step1 | Step2 | Step3 | Step4 | Step5 | Step6 |
    ----------------------------------------------------------
    |Channel1  |   1   |   0   |   0   |   0   |   0   |   1   |
    ----------------------------------------------------------
    |Channel1N |   0   |   0   |   1   |   1   |   0   |   0   |
    ----------------------------------------------------------
    |Channel2  |   0   |   0   |   0   |   1   |   1   |   0   |
    ----------------------------------------------------------
    |Channel2N |   1   |   1   |   0   |   0   |   0   |   0   |
    ----------------------------------------------------------
    |Channel3  |   0   |   1   |   1   |   0   |   0   |   0   |
    ----------------------------------------------------------
    |Channel3N |   0   |   0   |   0   |   0   |   1   |   1   |
    ----------------------------------------------------------
    -----------------------------------------------------------------------------*/

    /* Time Base configuration */
    TIM_InitTimBaseStruct(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.Prescaler = 0;
    TIM_TimeBaseStructure.CntMode   = TIM_CNT_MODE_UP;
    TIM_TimeBaseStructure.Period    = 4095;
    TIM_TimeBaseStructure.ClkDiv    = 0;
    TIM_TimeBaseStructure.RepetCnt  = 0;

    TIM_InitTimeBase(TIM1, &TIM_TimeBaseStructure);

    /* Channel 1, 2,3 and 4 Configuration in PWM mode */
    TIM_InitOcStruct(&TIM_OCInitStructure);
    TIM_OCInitStructure.OcMode       = TIM_OCMODE_TIMING;
    TIM_OCInitStructure.OutputState  = TIM_OUTPUT_STATE_ENABLE;
    TIM_OCInitStructure.OutputNState = TIM_OUTPUT_NSTATE_ENABLE;
    TIM_OCInitStructure.Pulse        = 2047;
    TIM_OCInitStructure.OcPolarity   = TIM_OC_POLARITY_HIGH;
    TIM_OCInitStructure.OcNPolarity  = TIM_OCN_POLARITY_HIGH;
    TIM_OCInitStructure.OcIdleState  = TIM_OC_IDLE_STATE_SET;
    TIM_OCInitStructure.OcNIdleState = TIM_OCN_IDLE_STATE_SET;

    TIM_InitOc1(TIM1, &TIM_OCInitStructure);

    TIM_OCInitStructure.Pulse = 1023;
    TIM_InitOc2(TIM1, &TIM_OCInitStructure);

    TIM_OCInitStructure.Pulse = 511;
    TIM_InitOc3(TIM1, &TIM_OCInitStructure);

    /* Automatic Output enable, Break, dead time and lock configuration*/
    TIM_InitBkdtStruct(&TIM_BDTRInitStructure);
    TIM_BDTRInitStructure.OssrState       = TIM_OSSR_STATE_ENABLE;
    TIM_BDTRInitStructure.OssiState       = TIM_OSSI_STATE_ENABLE;
    TIM_BDTRInitStructure.LockLevel       = TIM_LOCK_LEVEL_OFF;
    TIM_BDTRInitStructure.DeadTime        = 1;
    TIM_BDTRInitStructure.Break           = TIM_BREAK_IN_DISABLE; // TIM_BREAK_IN_ENABLE;
    TIM_BDTRInitStructure.BreakPolarity   = TIM_BREAK_POLARITY_HIGH;
    TIM_BDTRInitStructure.AutomaticOutput = TIM_AUTO_OUTPUT_ENABLE;

    TIM_ConfigBkdt(TIM1, &TIM_BDTRInitStructure);

    TIM_EnableCapCmpPreloadControl(TIM1, ENABLE);

    TIM_ConfigInt(TIM1, TIM_INT_COM, ENABLE);

    /* TIM1 counter enable */
    TIM_Enable(TIM1, ENABLE);

    /* Main Output Enable */
    TIM_EnableCtrlPwmOutputs(TIM1, ENABLE);

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
    /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_TIM1 | RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_GPIOE | RCC_APB2_PERIPH_GPIOB
                                | RCC_APB2_PERIPH_AFIO,
                            ENABLE);
}

/**
 * @brief  Configure the TIM1 Pins.
 */
void GPIO_Configuration(void)
{
    GPIO_InitType GPIO_InitStructure;

    /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
    GPIO_InitStruct(&GPIO_InitStructure);
    GPIO_InitStructure.Pin        = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);

    /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
    GPIO_InitStructure.Pin = GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);

    /* GPIOB Configuration: BKIN pin */
    GPIO_InitStructure.Pin       = GPIO_PIN_12;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitPeripheral(GPIOB, &GPIO_InitStructure);
}

/**
 * @brief  Configures the SysTick.
 */
void SysTick_Configuration(void)
{
    /* Setup SysTick Timer for 100 msec interrupts ,(SystemCoreClock) / 10) cannot be greater than 0xFFFFFF */
    if (SysTick_Config((SystemCoreClock) / 10))
    {
        /* Capture error */
        while (1)
            ;
    }

    NVIC_SetPriority(SysTick_IRQn, 0x0);
}

/**
 * @brief  Configures the nested vectored interrupt controller.
 */
void NVIC_Configuration(void)
{
    NVIC_InitType NVIC_InitStructure;

    /* Enable the TIM1 Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel                   = TIM1_TRG_COM_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

#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
 */
void assert_failed(const uint8_t* expr, const 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) */

    while (1)
    {
    }
}

#endif
/**
 * @}
 */

/**
 * @}
 */
