//------------------------------------------------------------------------------------------------------------
//
// ODROID-C GPIO(LED) / ADC Test Application.
//
// Defined port number is wiringPi port number.
//
// Compile : gcc -o <create excute file name> <source file name> -lwiringPi -lwiringPiDev -lpthread
// Run : sudo ./<created excute file name>
//
//------------------------------------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
 
#include <unistd.h>
#include <string.h>
#include <time.h>
 
#include <wiringPi.h>
#include <wiringPiI2C.h>
#include <wiringSerial.h>
#include <lcd.h>
 
//------------------------------------------------------------------------------------------------------------
//
// Global handle Define
//
//------------------------------------------------------------------------------------------------------------
 
#define DATA_UPDATE_PERIOD  100 // 100ms
 
//------------------------------------------------------------------------------------------------------------
//
// ADC:
//
//------------------------------------------------------------------------------------------------------------
#define PORT_ADC   0   // ADC.AIN0
#define MAX_ADC_VALUE	4095
 
//------------------------------------------------------------------------------------------------------------
//
// LED:
//
//------------------------------------------------------------------------------------------------------------
const int ledPorts[] = {
	7,
	0,
	2,
	3,
	12,
	13,
	14,
	21,
	22,
	23,
};
 
#define MAX_LED_CNT (sizeof(ledPorts) / sizeof(ledPorts[0]))
#define ADC_UNIT	(MAX_ADC_VALUE / MAX_LED_CNT)
 
//------------------------------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------------------------------
//
// system init
//
//------------------------------------------------------------------------------------------------------------
int system_init(void)
{
    int i;
 
    // GPIO Init(LED Port ALL Output)
    for(i = 0; i < MAX_LED_CNT; i++)    pinMode (ledPorts[i], OUTPUT);
 
    return  0;
 }
 
//------------------------------------------------------------------------------------------------------------
//
// board data update
//
//------------------------------------------------------------------------------------------------------------
void boardDataUpdate(void)
{
    int i, adcValue, ledPos;
 
    // adc value read
    if((adcValue = analogRead (PORT_ADC)))    {
	ledPos = adcValue / ADC_UNIT;
    }
    else
        ledPos = 0;
 
    //  LED Control
    for(i = 0; i < MAX_LED_CNT; i++)    digitalWrite (ledPorts[i], 0); // LED All Clear
    for(i = 0; i < ledPos;      i++)    digitalWrite (ledPorts[i], 1); // LED On
}
 
//------------------------------------------------------------------------------------------------------------
//
// Start Program
//
//------------------------------------------------------------------------------------------------------------
int main (int argc, char *argv[])
{
    static int timer = 0 ;
 
    wiringPiSetup ();
 
    if (system_init() < 0)
    {
        fprintf (stderr, "%s: System Init failed\n", __func__);     return -1;
    }
 
    for(;;)    {
        usleep(100000);
        if (millis () < timer)  continue ;
 
        timer = millis () + DATA_UPDATE_PERIOD;
 
        // All Data update
        boardDataUpdate();
    }
 
    return 0 ;
}