MCC Generated Code

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

1. 1.Create a new MPLAB X IDE project for PIC18F47Q10.
2. 2.Open MCC from the toolbar (more information about how to install the MCC plug-in can be found here).
3. 3.Go to Project Resources → System → System Module and make the following configurations:
   • Oscillator Select: HFINTOSC
   • HF Internal Clock: 32 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. 4.From the Device Resources window, add TMR1 and make the following configurations:

   Timer1 Configuration:

   • Enable Timer: checked
   • Timer Clock tab
     • Clock Source: FOSC/4
     • Prescaler: 1:8
   • Enable Gate tab: checked
     • Enable Gate Toggle: checked
     • Enable Gate Single-Pulse mode: checked
   • Enable Timer Gate Interrupt: checked
5. 5.Open Pin Manager → Grid View window and select UQFN40 in the MCU package field and make the following pin configurations to enable the internal signal access to the I/O:
   Figure 1. Pin Mapping

   
6. 6.Click Generate in the Project Resources tab.
7. 7.For this example, some extra code is required aside from the one generated from MCC.
   • The Global and Peripheral interrupts need to be enabled in the main.c file. The macros were created by the MCC and the user needs to remove the “//” so they are no longer treated as comments:

     Copy    
     // Enable the Global Interrupts
     INTERRUPT_GlobalInterruptEnable();
     
     // Enable the Peripheral Interrupts
     INTERRUPT_PeripheralInterruptEnable(); 
     

   • In the tmr1.c file, the TMR1_GATE_ISR() function needs to be updated to clear the Interrupt flag, read the counted value, reset it afterward and re-enable the timer gate control for a new acquisition. The following configuration is used:

     Copyvoid TMR1_GATE_ISR(void)
     {    
         volatile uint16_t value = 0;
         
         PIR5 &= ~(_PIR5_TMR1GIF_MASK);        
         
         value = TMR1_ReadTimer();
         
         TMR1_WriteTimer(0);                                                 
         
         T1GCON |= _T1GCON_T1GGO_MASK;    
     }