// LCD module connections
sbit LCD_RS at LATB0_bit;
sbit LCD_EN at LATB1_bit;
sbit LCD_D4 at LATB2_bit;
sbit LCD_D5 at LATB3_bit;
sbit LCD_D6 at LATB4_bit;
sbit LCD_D7 at LATB5_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
// End LCD module connections

#include "USBdsc.c"
#define TAILLE_BUFFER  64
#define TAILLE_MOYENNE 10
#define PE             5.
#define N              1024.
#define ALPHA          0.0039
#define E              5.
#define VOIE_OFFSET    2
#define VOIE_PT500     1
#define VOIE_LM35      0
#define GAIN_INA126    5

char ReadBuffer[TAILLE_BUFFER], WriteBuffer[TAILLE_BUFFER];

void Vider_Buffer(char * Buffer)
{
     char i;
     for (i=0;i<TAILLE_BUFFER;i++) Buffer[i]=0;
}

void interrupt()
{
    if (PIR2.USBIF == 1)
    {
      USB_Interrupt_Proc();
    }
}

void InitPic() {
     ADCON1=0b1011;
     CMCON = 7;
     TRISB = 0;
     
//------------- USB -------------
    TRISC.f4=1;  //D-
    TRISC.f5=1;  //D+
    HID_Enable(&ReadBuffer,&WriteBuffer);
}

int GetSample (int channel) {
    int i;
    int mean;
    
    mean = 0;
    
    for (i=0; i<TAILLE_MOYENNE; i++)
    {
      mean += ADC_Read(channel);
      Delay_ms(1);
    }
    mean /= TAILLE_MOYENNE;
    return mean;
}

void main() {
     float value;
     float offset;
     float temp_pt500 = 0;
     
     char ligne1[17];
     char ligne2[17];
     
     InitPic();
     Lcd_Init();
     Lcd_Cmd(_LCD_CLEAR);
     Lcd_Cmd(_LCD_CURSOR_OFF);
     while(1) {
              value = GetSample(VOIE_LM35) * PE / N;
              sprintf(ligne2, "LM35: %2.1f °C  ",value/0.01);
              Lcd_Out(2,1,ligne2);
              
              offset =  (GetSample(VOIE_OFFSET) * PE / N);
              value = ((GetSample(VOIE_PT500) * PE / N) - offset)/GAIN_INA126;
              temp_pt500 = (4. * value) / (ALPHA * (2.*value + E));
              sprintf(ligne1, "Pt500: %2.1f °C  ",temp_pt500);
              Lcd_Out(1,1,ligne1);

              Delay_ms(100);
     }
}