MINI58的ADC比较模式

/**************************************************************************//**

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V1.00

 * $Revision: 4 $

 * $Date: 15/06/02 9:19p $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Demonstrate ADC conversion and comparison function by

 *           monitoring the conversion result of channel 0.

 *

 * @note

 * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.

*****************************************************************************/

#include <stdio.h>

#include "Mini58Series.h"



void ADC_IRQHandler(void)

{

    uint32_t u32Flag;



    // Get ADC comparator interrupt flag

    u32Flag = ADC_GET_INT_FLAG(ADC, ADC_CMP0_INT | ADC_CMP1_INT);



    if(u32Flag & ADC_CMP0_INT)

        printf("Channel 0 input < 0x200\n");

    if(u32Flag & ADC_CMP1_INT)

        printf("Channel 0 input >= 0x200\n");



    ADC_CLR_INT_FLAG(ADC, u32Flag);

}





void SYS_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Set P5 multi-function pins for XTAL1 and XTAL2 */

    SYS->P5_MFP &= ~(SYS_MFP_P50_Msk | SYS_MFP_P51_Msk);

    SYS->P5_MFP |= (SYS_MFP_P50_XT1_IN | SYS_MFP_P51_XT1_OUT);



    /* Enable external 12MHz XTAL, HIRC */

    CLK->PWRCTL = CLK_PWRCTL_XTL12M | CLK_PWRCTL_HIRCEN_Msk;



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_STATUS_XTLSTB_Msk | CLK_STATUS_HIRCSTB_Msk);



    /* Switch HCLK clock source to XTL */

    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_XTAL,CLK_CLKDIV_HCLK(1));



    /* STCLK to XTL STCLK to XTL */

    CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_XTAL);



    /* Enable IP clock */

    CLK_EnableModuleClock(UART0_MODULE);

    CLK_EnableModuleClock(ADC_MODULE);



    /* Select IP clock source */

    CLK_SetModuleClock(UART0_MODULE,CLK_CLKSEL1_UARTSEL_XTAL,CLK_CLKDIV_UART(1));

    CLK_SetModuleClock(ADC_MODULE,CLK_CLKSEL1_ADCSEL_XTAL,CLK_CLKDIV_ADC(6));



    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set P1 multi-function pins for UART RXD, TXD */

    SYS->P1_MFP = SYS_MFP_P12_UART0_RXD | SYS_MFP_P13_UART0_TXD;



    /* Set P5.3 to ADC channel 0 input pin */

    SYS->P5_MFP |= SYS_MFP_P53_ADC_CH0;

    /* Analog pin OFFD to prevent leakage */

    P5->DINOFF |= (1 << 3) << GP_DINOFF_DINOFF0_Pos;



    /* To update the variable SystemCoreClock */

    SystemCoreClockUpdate();



    /* Lock protected registers */

    SYS_LockReg();

}



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 UART to 115200-8n1 for print message */

    UART_Open(UART0, 115200);



    printf("\nThis sample code demonstrate ADC conversion and comparison function\n");

    printf("by monitoring the conversion result of channel 0 (P5.3)\n");



    // Enable channel 0

    ADC_Open(ADC, 0, 0, 0x01);



    // Power on ADC

    ADC_POWER_ON(ADC);



    // Configure and enable Comparator 0 to monitor channel 0 input less than 0x200

    ADC_ENABLE_CMP0(ADC, 0, ADC_CMP0_LESS_THAN, 0x200, 16);

    // Configure and enable Comparator 1 to monitor channel 0 input greater or equal to 0x200

    ADC_ENABLE_CMP1(ADC, 0, ADC_CMP1_GREATER_OR_EQUAL_TO, 0x200, 16);



    // Enable ADC comparator 0 and 1 interrupt

    ADC_EnableInt(ADC, ADC_CMP0_INT);

    ADC_EnableInt(ADC, ADC_CMP1_INT);

    NVIC_EnableIRQ(ADC_IRQn);



    while(1)

    {

        // Trigger ADC conversion if it is idle

        if(!ADC_IS_BUSY(ADC))

        {

            ADC_START_CONV(ADC);

        }

    }



}



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