/**************************************************************************//**
 * @file     main.c
 * @version  V1.00
 * $Revision: 8 $
 * $Date: 16/02/19 9:36a $
 * @brief    Convert ADC channel 0, 1, 2 in Continuous Scan mode and print conversion results.
 *
 * @note
 * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include <stdio.h>
#include "Nano103.h"

void ADC_IRQHandler(void);  //ADC interrupt service routine

void ADC_IRQHandler(void)  //ADC interrupt service routine
{
    uint32_t u32Flag; //ADC interrupt status flag

    // Get ADC conversion finish interrupt flag
    u32Flag = ADC_GET_INT_FLAG(ADC, ADC_ADF_INT);
    // Check ADF flag
    if(u32Flag & ADC_ADF_INT)
    {
        uint32_t u32Result;
        // Show channel 0,1,2 conversion result
        u32Result = ADC_GET_CONVERSION_DATA(ADC, 0);
        printf("Channel 0 conversion result is 0x%x\n",u32Result);
        u32Result = ADC_GET_CONVERSION_DATA(ADC, 1);
        printf("Channel 1 conversion result is 0x%x\n",u32Result);
        u32Result = ADC_GET_CONVERSION_DATA(ADC, 2);
        printf("Channel 2 conversion result is 0x%x\n",u32Result);
    }
    // Clear ADC conversion finish interrupt flag
    ADC_CLR_INT_FLAG(ADC, u32Flag);
}

/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock                                                                                       */
/*---------------------------------------------------------------------------------------------------------*/
void SYS_Init(void)
{
    /* Unlock protected registers */
    SYS_UnlockReg();

    /* Set HCLK source form HXT and HCLK source divide 1  */
    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HXT,CLK_HCLK_CLK_DIVIDER(1));

    /* Enable external 12MHz HXT, 32KHz LXT and HIRC */
    CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk | CLK_PWRCTL_LXTEN_Msk | CLK_PWRCTL_HIRC0EN_Msk | CLK_PWRCTL_HIRC1EN_Msk | CLK_PWRCTL_MIRCEN_Msk);

    /* Waiting for clock ready */
    CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk | CLK_STATUS_LXTSTB_Msk | CLK_STATUS_HIRC0STB_Msk | CLK_STATUS_HIRC1STB_Msk | CLK_STATUS_MIRCSTB_Msk);

    /*  Set HCLK frequency 32MHz */
    CLK_SetCoreClock(32000000);

    /* Enable IP clock */
    CLK_EnableModuleClock(UART0_MODULE);
    CLK_EnableModuleClock(ADC_MODULE);

    /* Select IP clock source */
    CLK_SetModuleClock(UART0_MODULE,CLK_CLKSEL1_UART0SEL_HXT,CLK_UART0_CLK_DIVIDER(1));
    CLK_SetModuleClock(ADC_MODULE,CLK_CLKSEL1_ADCSEL_HIRC,CLK_ADC_CLK_DIVIDER(5));

    /*---------------------------------------------------------------------------------------------------------*/
    /* Init I/O Multi-function                                                                                 */
    /*---------------------------------------------------------------------------------------------------------*/
    /* Set PB multi-function pins for UART0 RXD and TXD */
    SYS->GPB_MFPL &= ~( SYS_GPB_MFPL_PB0MFP_Msk | SYS_GPB_MFPL_PB1MFP_Msk);
    SYS->GPB_MFPL |= (SYS_GPB_MFPL_PB0MFP_UART0_RXD | SYS_GPB_MFPL_PB1MFP_UART0_TXD );

    /* Set PA multi-function pins for ADC */
    /* PA.0 : ADC channel 0 */
    /* PA.1 : ADC channel 1 */
    /* PA.2 : ADC channel 2 */
    SYS->GPA_MFPL &= ~(SYS_GPA_MFPL_PA0MFP_Msk | SYS_GPA_MFPL_PA1MFP_Msk | SYS_GPA_MFPL_PA2MFP_Msk);
    SYS->GPA_MFPL |= SYS_GPA_MFPL_PA0MFP_ADC_CH0 | SYS_GPA_MFPL_PA1MFP_ADC_CH1 | SYS_GPA_MFPL_PA2MFP_ADC_CH2;

    /* Disable PA.0 PA.1 PA.2 digital input path */
    PA->DINOFF = PA->DINOFF | (((1<<0) | (1<<1) | (1<<2)) << GPIO_DINOFF_DINOFF0_Pos);

    /* Lock protected registers */
    SYS_LockReg();
}

void UART0_Init(void)
{
    /*---------------------------------------------------------------------------------------------------------*/
    /* Init UART                                                                                               */
    /*---------------------------------------------------------------------------------------------------------*/
    SYS_ResetModule(UART0_RST);  /* Reset UART0 */
    UART_Open(UART0, 115200);  /* Configure UART0 and set UART0 Baudrate */
}

int32_t main (void)
{
    /* Init System, IP clock and multi-function I/O
       In the end of SYS_Init() will issue SYS_LockReg()
       to lock protected register. If user want to write
       protected register, please issue SYS_UnlockReg()
       to unlock protected register if necessary */
    SYS_Init();

    /* Init UART0 for printf */
    UART0_Init();

    printf("+------------------------------------------------------------------------+\n");
    printf("|                 ADC Continuous mode Sample Code                        |\n");
    printf("+------------------------------------------------------------------------+\n");

    /*
      This sample code demonstrate ADC continuous scan conversion.
      Configure to single-ended, continuous mode, and enable channel 0,1,2.
      Set reference voltage to AVDD and enable ADF interrupt.
      It convert channel 0,1,2 continuously and print conversion result
     */

    // Enable channel 0,1,2
    ADC_Open(ADC, ADC_INPUT_MODE_SINGLE_END, ADC_OPERATION_MODE_CONTINUOUS, (ADC_CH_0_MASK | ADC_CH_1_MASK | ADC_CH_2_MASK));

    // Set reference voltage to AVDD
    ADC_SET_REF_VOLTAGE(ADC, ADC_REFSEL_POWER);

    // Power on ADC
    ADC_POWER_ON(ADC);

    // Enable ADC ADC_IF interrupt
    ADC_EnableInt(ADC, ADC_ADF_INT);
    // Enable NVIC ADC interrupt
    NVIC_EnableIRQ(ADC_IRQn);

    // Start
    ADC_START_CONV(ADC);

    while(1);
}

/*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/


