10.1 MCC Generated Code

To generate this project using MPLAB Code Configurator (MCC), follow the next steps:

1. Create a new MPLAB X IDE project for PIC18F47Q10.
2. Open MCC from the toolbar (more information about how to install the MCC plug-in can be found here).
3. Go to Project Resources → System → System Module and make the following configurations:
   • Oscillator Select: HFINTOSC
   • HF Internal Clock: 1 MHz
   • Clock Divider: 1
   • In the Watchdog Timer Enable field in the WWDT tab, WDT Disabled has to be selected
   • In the Programming tab, Low-Voltage Programming Enable has to be checked
4. From the Device Resources window, add TMR2, TMR4, ADCC and do the following configurations:

   Timer2 Configuration:

   • Enable Timer: checked
   • Control Mode: Roll over pulse
   • Ext. Reset Source: TMR4_postscaled
   • Start/Reset Option: Starts at T2ON = 1 and TMR2_ers = 0
   • Timer Clock tab
     • Clock Source: LFINTOSC
     • Clock Prescaler: 1:64
     • Postscaler: 1:1
   • Set 100 ms period in the Timer Period tab

   Timer4 Configuration:

   • Enable Timer: checked
   • Control Mode: Roll over pulse
   • Ext. Reset Source: T4INPPS
   • Start/Reset Option: Resets at TMR4_ers = 1
   • Timer Clock tab
     • Clock Source: LFINTOSC
     • Clock Prescaler: 1:64
     • Postscaler: 1:1
   • Set 500 ms period in the Timer Period tab
   • Enable Timer Interrupt: checked

   ADCC Configuration:

   • Enable ADC: Checked
   • Operating: Basic mode
   • • In the ADC tab, check the following options:
       • ADC Clock → Clock Source: Select FRC
       • Auto-conversion Trigger: Select TMR2
     • CVD Features tab:
       • Enable ADC Interrupt: checked
5. Open Pin Manager → Grid View window, select UQFN40 in the MCU package field, and select the I/O pins outputs to enable the internal signal access to the I/O.

   

6. Go to Project Resources → Pin Module → RA0(ANA0) and select only the Analog box. For the RC7 pin, select WPU, rename IO_RE0 to LED0 and select Output box .
7. Click Generate in the Project Resources tab.
8. Add these lines into the main.c file:

   #define DesiredThreshold    300         /* Desired threshold value */
   #define MaxThreshold        500         /* Maximum threshold value */
   volatile uint16_t adcVal;
   
   void TMR4_interrupt(void)
   {
       /* HLT trigger: if adcVal > MaxThreshold and pin RC7 pulled-down */
       if (adcVal > MaxThreshold)
       {
           /* Toggle LED0 at the Timer2Period frequency */
           LED0_Toggle();
           /* HLT will stop TMR2 that also stops ADCC */
           TMR2_Stop();
       }
   }    
   void ADCC_interrupt(void)
   {
       /* This will toggle at a rate of 10Hz if adcVal < DesiredThreshold */
       if (adcVal < DesiredThreshold)
       {
           LED0_Toggle();
       }
       adcVal = ADCC_GetConversionResult();
   }
   
   void main(void)
   {
       // Initialize the device
       SYSTEM_Initialize();
       TMR4_SetInterruptHandler(TMR4_interrupt);
       ADCC_SetADIInterruptHandler(ADCC_interrupt);
       // Enable the Global Interrupts
       INTERRUPT_GlobalInterruptEnable();
       // Enable the Peripheral Interrupts
       INTERRUPT_PeripheralInterruptEnable();
   
       while (1)
       {
           if ((adcVal > DesiredThreshold)&&(adcVal < MaxThreshold))
           {
               LED0_SetLow();
           }
       }
   }