/*!
    \file    main.c
    \brief   TIMER1 trigger inserted channel of ADC0

    \version 2024-01-05, V1.2.0, firmware for GD32H7xx
*/

/*
    Copyright (c) 2024, GigaDevice Semiconductor Inc.

    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 the copyright holder 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.
*/

#include "gd32h7xx.h"
#include "gd32h759i_eval.h"
#include "systick.h"
#include <stdio.h>

uint32_t inserted_data[4];

/* configure the different system clocks */
void rcu_config(void);
/* configure the nested vectored interrupt controller */
void nvic_config(void);
/* configure the GPIO peripheral */
void gpio_config(void);
/* configure the TIMER peripheral */
void timer_config(void);
/* configure the TRIGSEL peripheral */
void trigsel_config(void);
/* configure the ADC peripheral */
void adc_config(void);
/* enable the CPU Cache */
void cache_enable(void);

/*!
    \brief      main function
    \param[in]  none
    \param[out] none
    \retval     none
*/
int main(void)
{
    /* enable the CPU Cache */
    cache_enable();
    /* system clocks configuration */
    rcu_config();
    /* systick configuration */
    systick_config();
    /* GPIO configuration */
    gpio_config();
    /* NVIC configuration */
    nvic_config();
    /* TIMER configuration */
    timer_config();
    /* ADC configuration */
    adc_config();
    /* TRIGSEL configuration */
    trigsel_config();
    /* enable TIMER1 */
    timer_enable(TIMER1);
    /* configure COM port */
    gd_eval_com_init(EVAL_COM);

    while(1) {
        delay_1ms(1000);
        printf("\r\n ADC0 inserted channel 0 data = %d \r\n", inserted_data[0]);
        printf("\r\n ADC0 inserted channel 1 data = %d \r\n", inserted_data[1]);
        printf("\r\n ADC0 inserted channel 2 data = %d \r\n", inserted_data[2]);
        printf("\r\n ADC0 inserted channel 3 data = %d \r\n", inserted_data[3]);
        printf("\r\n ***********************************\r\n");
    }
}

/*!
    \brief      configure the different system clocks
    \param[in]  none
    \param[out] none
    \retval     none
*/
void rcu_config(void)
{
    /* enable GPIOC clock */
    rcu_periph_clock_enable(RCU_GPIOA);
    /* enable ADC clock */
    rcu_periph_clock_enable(RCU_ADC0);
    /* enable trigsel clock */
    rcu_periph_clock_enable(RCU_TRIGSEL);
    /* enable timer1 clock */
    rcu_periph_clock_enable(RCU_TIMER1);
    rcu_timer_clock_prescaler_config(RCU_TIMER_PSC_MUL4);
}

/*!
    \brief      configure the GPIO peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void gpio_config(void)
{
    /* config the GPIO as analog mode */
    gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE,
                  GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);
}

/*!
    \brief      configure the TIMER peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void timer_config(void)
{
    timer_oc_parameter_struct timer_ocintpara;
    timer_parameter_struct timer_initpara;

    /* TIMER1 configuration */
    timer_initpara.prescaler         = 59999;
    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;
    timer_initpara.counterdirection  = TIMER_COUNTER_UP;
    timer_initpara.period            = 9999;
    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;
    timer_initpara.repetitioncounter = 0;
    timer_init(TIMER1, &timer_initpara);

    /* CH0 configuration in PWM mode1 */
    timer_ocintpara.ocpolarity  = TIMER_OC_POLARITY_HIGH;
    timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
    timer_channel_output_config(TIMER1, TIMER_CH_1, &timer_ocintpara);

    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 3999);
    timer_channel_output_mode_config(TIMER1, TIMER_CH_1, TIMER_OC_MODE_PWM1);
    timer_channel_output_shadow_config(TIMER1, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);
}

/*!
    \brief      configure the ADC peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void adc_config(void)
{
    /* reset ADC */
    adc_deinit(ADC0);
    /* ADC clock config */
    adc_clock_config(ADC0, ADC_CLK_SYNC_HCLK_DIV6);
    /* ADC contineous function enable */
    adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, DISABLE);
    /* ADC scan mode enable */
    adc_special_function_config(ADC0, ADC_SCAN_MODE, ENABLE);
    /* ADC resolution config */
    adc_resolution_config(ADC0, ADC_RESOLUTION_12B);
    /* ADC data alignment config */
    adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);

    /* ADC channel length config */
    adc_channel_length_config(ADC0, ADC_INSERTED_CHANNEL, 4);

    /* ADC 1/4 voltate of external battery config */
    adc_inserted_channel_config(ADC0, 0, ADC_CHANNEL_16, 240);
    /* ADC temperature sensor channel config */
    adc_inserted_channel_config(ADC0, 1, ADC_CHANNEL_17, 240);
    /* ADC internal reference voltage channel config */
    adc_inserted_channel_config(ADC0, 2, ADC_CHANNEL_14, 240);
    /* ADC high precision temperature sensor channel config */
    adc_inserted_channel_config(ADC0, 3, ADC_CHANNEL_15, 240);

    /* ADC trigger config */
    adc_external_trigger_config(ADC0, ADC_INSERTED_CHANNEL, EXTERNAL_TRIGGER_RISING);
    /* clear the ADC flag */
    adc_interrupt_flag_clear(ADC0, ADC_INT_FLAG_EOC);
    adc_interrupt_flag_clear(ADC0, ADC_INT_FLAG_EOIC);
    /* enable ADC interrupt */
    adc_interrupt_enable(ADC0, ADC_INT_EOIC);

    /* enable ADC interface */
    adc_enable(ADC0);
    /* wait for ADC stability */
    delay_1ms(1);
    /* ADC calibration mode config */
    adc_calibration_mode_config(ADC0, ADC_CALIBRATION_OFFSET);
    /* ADC calibration number config */
    adc_calibration_number(ADC0, ADC_CALIBRATION_NUM1);
    /* ADC calibration and reset calibration */
    adc_calibration_enable(ADC0);

}

/*!
    \brief      configure the TRIGSEL peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void trigsel_config(void)
{
    trigsel_init(TRIGSEL_OUTPUT_ADC0_INSTRG, TRIGSEL_INPUT_TIMER1_CH1);
}

/**
    \brief      configure the nested vectored interrupt controller
    \param[in]  none
    \param[out] none
    \retval     none
  */
void nvic_config(void)
{
    nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
    nvic_irq_enable(ADC0_1_IRQn, 1, 1);
}

/*!
    \brief      enable the CPU cache
    \param[in]  none
    \param[out] none
    \retval     none
*/
void cache_enable(void)
{
    /* enable I-Cache */
    SCB_EnableICache();

    /* enable D-Cache */
    SCB_EnableDCache();
}

/* retarget the C library printf function to the USART */
int fputc(int ch, FILE *f)
{
    usart_data_transmit(EVAL_COM, (uint8_t)ch);
    while(RESET == usart_flag_get(EVAL_COM, USART_FLAG_TBE));
    return ch;
}
