PIC12F675 Timer0 Code tutorial
PIC12F675 Timer 0 Code tutorial
This post provides the timer0 code for PIC12F675 microcontroller. This code is written in C language using MPLAB X IDE with XC8 compiler. You can download this code from the 'Downloads' section at the bottom of this page.
Simulation:
In this circuit, PIC12F675 is running on internal oscillator of 4MHz value.GP0 pin is toggled every time timer0 expires and executes it's ISR code.
Calculations:
In this function, OPTION_REG is initialized to make timer0 prescalar to be 1:2. Timer0 is an 8bit timer, so it expires after reaching a value of 255. When timer0 prescalar is made 1:2 then it means that timer0 value will increment after every two clock cycles. Since PIC12F675 is running at 1MIPS speed, this means that timer0 will expire after every 256*2 = 512 usec.T0IE bit enables timer0 interrupts and GIE bit enables global interrupts.
Whenever timer0 expires, then an interrupt is generated which executes
the function shown above in the Figure 4. In this function, GP0 pin is
toggled every time and timer0 interrupt flag is cleared. This means that
in Figure 1 when ever GP0 pin toggles than timer0 interrupt has
occurred.
This is just an example code for timer0 of PIC12F675 microcontroller. You can modify it to fulfill your circuit requirements. You can leave your comments in the comment section below.
Timer0 code for PIC12F675 was compiled in MPLAB X IDE with XC8 compiler and simulation was made in Proteus v7.10. To download code and Proteus simulation click here.
This post provides the timer0 code for PIC12F675 microcontroller. This code is written in C language using MPLAB X IDE with XC8 compiler. You can download this code from the 'Downloads' section at the bottom of this page.
Simulation:
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| Figure1 : PIC12F675 Timer 0 Simulation |
Code:
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| Figure2: Circuit for PIC16F877A ADC |
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| Figure2: PIC12F675 Timer 0 Code |
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| Figure3: Timer 0 Initializing code |
Calculations:
In this function, OPTION_REG is initialized to make timer0 prescalar to be 1:2. Timer0 is an 8bit timer, so it expires after reaching a value of 255. When timer0 prescalar is made 1:2 then it means that timer0 value will increment after every two clock cycles. Since PIC12F675 is running at 1MIPS speed, this means that timer0 will expire after every 256*2 = 512 usec.T0IE bit enables timer0 interrupts and GIE bit enables global interrupts.
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| Figure4 : Interrupt service routine code |
This is just an example code for timer0 of PIC12F675 microcontroller. You can modify it to fulfill your circuit requirements. You can leave your comments in the comment section below.
