/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.1
 * Date               : 2026/05/13
 * Description        : Main program body.
 *********************************************************************************
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * Attention: This software (modified or not) and binary are used for 
 * microcontroller manufactured by Nanjing Qinheng Microelectronics.
 *******************************************************************************/

/*
 *@Note
 *Analog watchdog routine:
 *ADC channel 1 (PA1), detect that the ADC conversion data on the rule group channel
 *is outside 2000 - 3500 and trigger the simulation Watchdog interrupt.
 *
 */

#include "debug.h"

/*********************************************************************
 * @fn      ADC_Function_Init
 *
 * @brief   Initializes ADC collection.
 *
 * @return  none
 */
void ADC_Function_Init(void)
{
    ADC_InitTypeDef  ADC_InitStructure = {0};
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    NVIC_InitTypeDef NVIC_InitStructure = {0};

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    RCC_ADCCLKConfig(RCC_PCLK2_Div8);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_DeInit(ADC1);
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);

    /* Higher Threshold:3500, Lower Threshold:2000 */
    ADC_AnalogWatchdogThresholdsConfig(ADC1, 3500, 2000);
    ADC_AnalogWatchdogSingleChannelConfig(ADC1, ADC_Channel_1);
    ADC_AnalogWatchdogCmd(ADC1, ADC_AnalogWatchdog_SingleRegEnable);

    NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    ADC_ITConfig(ADC1, ADC_IT_AWD, ENABLE);
    ADC_Cmd(ADC1, ENABLE);

    ADC_BufferCmd(ADC1, DISABLE); //disable buffer
    ADC_ResetCalibration(ADC1);
    while(ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1));
}

/*********************************************************************
 * @fn      Get_ADC_Val
 *
 * @brief   Returns ADCx conversion result data.
 *
 * @param   ch - ADC channel.
 *            ADC_Channel_0 - ADC Channel0 selected.
 *            ADC_Channel_1 - ADC Channel1 selected.
 *            ADC_Channel_2 - ADC Channel2 selected.
 *            ADC_Channel_3 - ADC Channel3 selected.
 *            ADC_Channel_4 - ADC Channel4 selected.
 *            ADC_Channel_5 - ADC Channel5 selected.
 *            ADC_Channel_6 - ADC Channel6 selected.
 *            ADC_Channel_7 - ADC Channel7 selected.
 *            ADC_Channel_8 - ADC Channel8 selected.
 *            ADC_Channel_9 - ADC Channel9 selected.
 *            ADC_Channel_10 - ADC Channel10 selected.
 *            ADC_Channel_11 - ADC Channel11 selected.
 *            ADC_Channel_12 - ADC Channel12 selected.
 *            ADC_Channel_13 - ADC Channel13 selected.
 *            ADC_Channel_14 - ADC Channel14 selected.
 *            ADC_Channel_15 - ADC Channel15 selected.
 *            ADC_Channel_16 - ADC Channel16 selected.
 *            ADC_Channel_17 - ADC Channel17 selected.
 *
 * @return  none
 */
u16 Get_ADC_Val(u8 ch)
{
    u16 val;

    ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5);
    ADC_SoftwareStartConvCmd(ADC1, ENABLE);

    while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));

    val = ADC_GetConversionValue(ADC1);

    return val;
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
    u16 ADC_val;

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
    SystemCoreClockUpdate();
    Delay_Init();
    USART_Printf_Init(115200);
    printf("SystemClk:%d\r\n", SystemCoreClock);
    printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );

    ADC_Function_Init();

    while(1)
    {
        ADC_val = Get_ADC_Val(ADC_Channel_1);
        Delay_Ms(500);
        printf("%04d\r\n", ADC_val);
        Delay_Ms(2);
    }
}