/*******************************************************************************
  Main Source File

  Company:
    Microchip Technology Inc.

  File Name:
    main.c

  Summary:
    This file contains the "main" function for a project.

  Description:
    This file contains the "main" function for a project.  The
    "main" function calls the "SYS_Initialize" function to initialize the state
    machines of all modules in the system
 *******************************************************************************/

// *****************************************************************************
// *****************************************************************************
// Section: Included Files
// *****************************************************************************
// *****************************************************************************

#include <stddef.h>                     // Defines NULL
#include <stdbool.h>                    // Defines true
#include <stdlib.h>                     // Defines EXIT_FAILURE
#include "definitions.h"                // SYS function prototypes


#include <stdio.h>

#include "lcd_ACM1602_lib_i2c.h"




int delay_Clock = 200000000;   //200MHz
char Buf[32];

void delay_us(volatile unsigned int usec)        //1μsec遅延
{
        volatile  int count;

        count = (int)(delay_Clock/20000000)*usec;


        do      //実測　at　200MH (Clock=200000000)
        {       //delay_us(1000)：1000.4μsec  delay_us(100)：100.6μsec  delay_us(10):10.5μsec　　delay_us(1)：1.5μsec
                asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP");asm("NOP");
                asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP"); asm("NOP");

                count--;
        }while(count != 0);
}



void delay_ms(volatile unsigned int msec)        //1msec遅延
{
        volatile unsigned int i;         //実測：at200MH (Clock=200000000)//delay_ms(1)： 1.0006msec   delay_ms(100)：100.04msec

        for(i=0; i<msec; i++)
        delay_us(1000);
}




void AdcFunc(void)          //AD変換、表示
{
    unsigned int AdcValue;
    float Volt;
    
    
    //AD変換開始 Trigger a conversion 
    ADCCON3bits.GSWTRG = 1; //AD変換ソフトウェアトリガ //Global Level Software Trigger bit
    
    //変換完了を待つ Wait the conversions to complete
    while (ADCDSTAT1bits.ARDY7 == 0);
           
    //結果の取り出し fetch the result
    AdcValue = ADCDATA7;
    
    Volt =(float)AdcValue/4095*3.3; //ボルト表示化
    
    
    lcd_ACM1602_cmd_i2c(0x80);  //1行目の先頭へ
    sprintf(Buf,"AdV=%u           ",AdcValue); //バッファーに文字列をセット
    lcd_ACM1602_str_i2c(Buf);
    
    lcd_ACM1602_cmd_i2c(0xC0);  //2行目の先頭へ
    sprintf(Buf,"Volt=%.2f[V]       ",Volt);       //文字列としてバッファーに収納
    lcd_ACM1602_str_i2c(Buf);
 
    
     delay_ms(250);
}




void APP_Initialize ( void )
{
    
    
    
    // Configure ADCCON1 
    ADCCON1 = 0;    //
    ADCCON1bits.FRACT = 0; // use Integer output format
    ADCCON1bits.SELRES = 3; // ADC7 resolution is 12 bits   //default
    ADCCON1bits.STRGSRC = 0; // No scan trigger.      
 
 
    // Configure ADCCON2
    ADCCON2 = 0;
    ADCCON2bits.SAMC = 5; // ADC7 sampling time = 5 * TAD7
    ADCCON2bits.ADCDIV = 1; // ADC7 clock freq is half of control clock = TAD7


    // Configure ADCCON3
    ADCCON3 = 0;
    ADCCON3bits.ADCSEL = 0;     //クロックソース:PBCLK3     // Select input clock source   
    ADCCON3bits.CONCLKDIV = 1;  // Control clock frequency is half of input clock
    ADCCON3bits.VREFSEL = 0;    // Select AVdd and AVss as reference source
    ADCCON3bits.DIGEN7 = 1;     //ADC7：有効               //Shared ADC (ADC7) Digital Enable bit
    ADCCON3bits.RQCNVRT = 1;    //個別ポート入力モード      //Individual ADC Input Conversion Request bit
    ADCCON3bits.ADINSEL = 8;   //入力ポートに AN8 設定    //Analog Input Select bits
    ADCCON3bits.SAMP = 1;       //クラス2モード設定         //Class 2 and Class 3 Analog Input Sampling Enable bit


    // No selection for dedicated ADC modules, no pre sync trigger, not sync sampling 
    ADCTRGMODE = 0;

    // Select ADC input mode //ADC INPUT MODE CONTROL REGISTER 1
    ADCIMCON1bits.SIGN8 = 0; // unsigned data format
    ADCIMCON1bits.DIFF8 = 0; // Single ended mode

    ADCTRG2bits.TRGSRC7 = 1; //AN7(ADC7)をソフトウェアトリガに設定    //Trigger Source for Conversion of Analog Input AN7 Select bits //必須


    // Turn the ADC on 
    ADCCON1bits.ON = 1;


    // Enable clock to analog circuit 
    ADCANCONbits.ANEN7 = 1; // Enable the clock to analog bias

    // Wait for ADC to be ready
    while(!ADCANCONbits.WKRDY7); // Wait until ADC7 is ready

    // Enable the ADC module 
    ADCCON3bits.DIGEN7 = 1; // ADC7 ADCデジタル回路ON

    
       
    
    lcd_ACM1602_init_i2c();     //I2Cインターフェース式液晶初期化
    lcd_ACM1602_cmd_i2c(0x0C);    //カーソル：0FF、ブリンク：0FF
    
    
    lcd_ACM1602_cmd_i2c(0x80);  //1行目の先頭へ
    lcd_ACM1602_str_i2c("CN2:  AN8_ADC7       ");
    
    lcd_ACM1602_cmd_i2c(0xC0);  //2行目の先頭へ
    lcd_ACM1602_str_i2c("   I2C5_LCD     ");


    
    delay_ms(2000);
    
}






// *****************************************************************************
// *****************************************************************************
// Section: Main Entry Point
// *****************************************************************************
// *****************************************************************************

int main ( void )
{
    /* Initialize all modules */
    SYS_Initialize ( NULL );
    
    APP_Initialize ( );


    while ( true )
    {
        /* Maintain state machines of all polled MPLAB Harmony modules. */
        SYS_Tasks ( );
        
        AdcFunc(); 
    }

    /* Execution should not come here during normal operation */

    return ( EXIT_FAILURE );
}


/*******************************************************************************
 End of File
*/