/*****************************************************************************
 * 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,
 * 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.
 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version v1.0.1
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include "n32g4fr.h"

/** @addtogroup DAC_DualModeDMA_SineWave
 * @{
 */

#define DAC_DHR12RD_Address 0x40007420

/* Init Structure definition */
DAC_InitType DAC_InitStructure;
uint32_t Idx = 0;

const uint16_t Sine12bit[32] = {2047, 2447, 2831, 3185, 3498, 3750, 3939, 4056, 4095, 4056, 3939,
                                3750, 3495, 3185, 2831, 2447, 2047, 1647, 1263, 909,  599,  344,
                                155,  38,   0,    38,   155,  344,  599,  909,  1263, 1647};

uint32_t DualSine12bit[32];

void RCC_Configuration(void);
void GPIO_Configuration(void);
void TIM4_TrgoInit(void);
void DAC_SineWaveInit(void);
void DMA_Config(void);

/**
 * @brief   Main program.
 */
int main(void)
{
    /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
       connected to the DAC converter. In order to avoid parasitic consumption,
       the GPIO pin should be configured in analog */
    GPIO_Configuration();
    /* TIM4Init */
    TIM4_TrgoInit();
    /* DAC SineWave Config */
    DAC_SineWaveInit();

    /* Fill Sine32bit table */
    for (Idx = 0; Idx < 32; Idx++)
    {
        DualSine12bit[Idx] = (Sine12bit[Idx] << 16) + (Sine12bit[Idx]);
    }
    /* DMA Config */
    DMA_Config();

    /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is
       automatically connected to the DAC converter. */
    DAC_Enable(DAC_CHANNEL_1, ENABLE);
    /* Enable DAC Channel2: Once the DAC channel2 is enabled, PA.05 is
       automatically connected to the DAC converter. */
    DAC_Enable(DAC_CHANNEL_2, ENABLE);

    /* Enable DMA for DAC Channel2 */
    DAC_DmaEnable(DAC_CHANNEL_2, ENABLE);

    /* TIM2 enable counter */
    TIM_Enable(TIM4, ENABLE);

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
    /* DAC Periph clock enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_DAC, ENABLE);
}

/**
 * @brief  Configures the different GPIO ports.
 */
void GPIO_Configuration(void)
{
    GPIO_InitType GPIO_InitStructure;

    /* GPIOA Periph clock enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA, ENABLE);
    /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
       connected to the DAC converter. In order to avoid parasitic consumption,
       the GPIO pin should be configured in analog */
	GPIO_InitStruct(&GPIO_InitStructure);
    GPIO_InitStructure.Pin       = GPIO_PIN_4 | GPIO_PIN_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
}
/**
 * @brief  TIM4 Init.
 */
void TIM4_TrgoInit(void)
{
    TIM_TimeBaseInitType TIM_TimeBaseStructure;

    /* TIM4 Periph clock enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_TIM4, ENABLE); // RCC_APB2_PERIPH_TIM8
    /* TIM4 Configuration */
    /* Time base configuration */
    TIM_InitTimBaseStruct(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.Period    = 13; 
    TIM_TimeBaseStructure.Prescaler = 0x0;
    TIM_TimeBaseStructure.ClkDiv    = 0x0;
    TIM_TimeBaseStructure.CntMode   = TIM_CNT_MODE_UP;
    TIM_InitTimeBase(TIM4, &TIM_TimeBaseStructure);

    /* TIM4 TRGO selection */
    TIM_SelectOutputTrig(TIM4, TIM_TRGO_SRC_UPDATE);
}
/**
 * @brief  DAC SineWave Config.
 */
void DAC_SineWaveInit(void)
{
    /* DAC Periph clock enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_DAC, ENABLE);

    /* DAC channel1 Configuration */
	DAC_ClearStruct(&DAC_InitStructure);
    DAC_InitStructure.Trigger      = DAC_TRG_T4_TRGO;
    DAC_InitStructure.WaveGen      = DAC_WAVEGEN_NONE;
    DAC_InitStructure.BufferOutput = DAC_BUFFOUTPUT_DISABLE;
    DAC_Init(DAC_CHANNEL_1, &DAC_InitStructure);

    /* DAC channel2 Configuration */
    DAC_Init(DAC_CHANNEL_2, &DAC_InitStructure);
}
/**
 * @brief  DMA Config.
 */
void DMA_Config(void)
{
    DMA_InitType DMA_InitStructure;

    /* DMA2 clock enable */
    RCC_EnableAHBPeriphClk(RCC_AHB_PERIPH_DMA2, ENABLE);
    DMA_DeInit(DMA2_CH4);
	DMA_StructInit(&DMA_InitStructure);
    DMA_InitStructure.PeriphAddr     = DAC_DHR12RD_Address;
    DMA_InitStructure.MemAddr        = (uint32_t)&DualSine12bit;
    DMA_InitStructure.Direction      = DMA_DIR_PERIPH_DST;
    DMA_InitStructure.BufSize        = 32;
    DMA_InitStructure.PeriphInc      = DMA_PERIPH_INC_DISABLE;
    DMA_InitStructure.DMA_MemoryInc  = DMA_MEM_INC_ENABLE;
    DMA_InitStructure.PeriphDataSize = DMA_PERIPH_DATA_SIZE_WORD;
    DMA_InitStructure.MemDataSize    = DMA_MemoryDataSize_Word;
    DMA_InitStructure.CircularMode   = DMA_MODE_CIRCULAR;
    DMA_InitStructure.Priority       = DMA_PRIORITY_HIGH;
    DMA_InitStructure.Mem2Mem        = DMA_M2M_DISABLE;
    DMA_Init(DMA2_CH4, &DMA_InitStructure);
    /* Enable DMA2 Channel4 */
    DMA_EnableChannel(DMA2_CH4, ENABLE);
}
