2.6 Power Driver

• System>Clock Control:

  • Clock Source: FOSC (1MHz_HFINTOSC/16)

• System>Pins:

  • Pin Grid View: Select LED D0, D1, D2 and D3 pins as outputs (Check the schematic for your board)

  • Pin Grid View: Select RA5 and RB0 pin as switch inputs (check the schematic for your board)

  • Enable Weak Pullup if needed

• Drivers>Timer:

  • Timer PLIB Selector: TMR0 & TMR1

  • Timer Enable: True

  • Interrupt Driven: True

  • Requested Period: 1 s

• Drivers>Power:

  • Add power driver to project resources

#include "mcc_generated_files/system/system.h"
#include "mcc_generated_files/power/power.h"

/*
 * Development Board: Explorer 8 Development Board with PIC18F45K22 DIP package IC.
 * MCC Configuration:
 *     System module: FOSC (1MHz_HFINTOSC/16)
 *     TMR0, Timer Enable - True, Interrupt Driven - True, Requested Timer Period - 1 s
 *     TMR1, Timer Enable - True, Interrupt Driven - True, Requested Timer Period - 1 s
 *     Pins module: RD0 - GPIO Output LED for TMR0 toggle, 
 *                  RD1 - GPIO Output LED for TMR1 Toggle,
                    RD2 - GPIO Output LED not used, 
                    RD3 - GPIO Output LED for button press indication,
                    RB0 - GPIO Input for Switch 1,
                    RA5 - GPIO Input for Switch 2,
                    
 */

void LED_PIN_ISR_RD0(void){ 
    IO_RD0_Toggle(); //Turns the pin called 'RD0' on or off for 1s TMR0.
}

void LED_PIN_ISR_RD1(void){ 
    IO_RD1_Toggle(); //Turns the pin called 'RD1' on or off for 1s TMR1.
}

int main(void)
{
    SYSTEM_Initialize();
    bool error_lp,error_en,error_dis;

    TMR0_OverflowCallbackRegister(LED_PIN_ISR_RD0);
    TMR1_OverflowCallbackRegister(LED_PIN_ISR_RD1);
    // If using interrupts in PIC18 High/Low Priority Mode you need to enable the Global High and Low Interrupts 
    // If using interrupts in PIC Mid-Range Compatibility Mode you need to enable the Global Interrupts 
    // Use the following macros to: 
    // Enable the Global Interrupts 
    INTERRUPT_GlobalInterruptEnable(); 

    // Disable the Global Interrupts 
    //INTERRUPT_GlobalInterruptDisable(); 
    
        // Enable the Peripheral Interrupts 
    INTERRUPT_PeripheralInterruptEnable(); 

    // Disable the Peripheral Interrupts 
    //INTERRUPT_PeripheralInterruptDisable(); 

    while(1)
    {
        if(IO_RB0_PORT == 0)          //Press Switch 1
        {
            error_dis = POWER_PeripheralDisable(POWER_TMR1);
            if (!error_dis) {
                IO_RD3_SetHigh();       //SET LED D3 if peripheral is disabled and switch 1 is pressed
                IO_RD1_SetLow();        //CLEAR LED D1 if peripheral is disabled
            }    
            error_lp = POWER_LowPowerModeEnter(POWER_IDLE_MODE); // Enter low power mode POWER_IDLE_MODE
            if (error_lp) {           
                IO_RD0_SetHigh();   // Handle error if necessary if sleep mode is invalid.
            }
        }
        
        if(IO_RA5_PORT == 0)          //Press Switch 2
        {
            error_en = POWER_PeripheralEnable(POWER_TMR1);
            if (!error_en) {
                IO_RD3_SetLow();        //CLEAR LED D3 if peripheral is re-enabled and switch 2 is pressed
                TMR1_Initialize();                              //re-initialize sequence for TMR1
                TMR1_OverflowCallbackRegister(LED_PIN_ISR_RD1);
            }
        }
    }    
}