What is the difference between software delay and hardware delay?

What is the difference between software delay and hardware delay?

Hardware timers are very precise, but there is usually a limited number of them available. Software timers just consume CPU cycles and memory space, which are the only limits on the number that you can have.

What is delay in PIC microcontroller?

Pic Microcontroller Delay Calculation formula. Tick/Counter frequency. Tick/Counter frequency is the final frequency on which the timer is working. Timer Count. Timer Count is the number of counts required to generate a particular delay/frequency at output of microcontroller pin.

What is a software delay?

Using a “Software delay” you force the controller to put all its resources into processing some kind of loop (incrementing a variable until a given value) and thus blocking the rest of the code execution path.

What is hardware delay 8051?

That means the the timer advances once in every 1uS and the maximum time delay possible using a single 8051 timer is ( 2^16) x (1µS) = 65536µS. Delays longer than this can be implemented by writing up a basic delay program using timer and then looping it for a required number of time.

How do I make a picture delay?

Below are the steps for configuring and using the Timer2 for delay generation:

1. Calculate the Timer Count for the required delay.
2. Set the Prescaler bits in T2CON as per the delay calculations.
3. Load the timer value into TMR2 register.
4. Enable the Timer2 Interrupt by setting TMR2IE bit.

What is the need of timers in PIC microcontroller?

The Timer is used to measure the time or generate an accurate time delay. It is an important application in an embedded system. It maintains the timing of operation in sync with a system clock or an external clock.

What is the difference between timer and delay?

As for Timer ON Delay, Timer starts by turning ON the timer trigger bit, and the timer output bit turns ON when the setup time has passed. As for Timer OFF Delay, the timer output bit turns OFF when the setup time has passed after the timer input bit had turned OFF.

What’s the maximum delay for a PIC microcontroller?

The maximum delay that can be used is based on Crystal oscillator used. Physically, timer is a register whose value is continually increasing to 255, and then it starts all over again: 0, 1, 2, 3, 4…255….0, 1, 2, 3……etc. The PIC16F877A PIC MCU has three Timer Modules. They are names as Timer0, Timer1 and Timer2.

What are the timers in the pic16f877a MCU?

Physically, timer is a register whose value is continually increasing to 255, and then it starts all over again: 0, 1, 2, 3, 4…255….0, 1, 2, 3……etc. The PIC16F877A PIC MCU has three Timer Modules. They are names as Timer0, Timer1 and Timer2. The Timer 0 and Timer 2 are 8-bit Timers and Timer 1 is a 16-bit Timer.

How does the timer in a PIC microcontroller work?

Both registers are separately accessible thus Timer0 can work in both 8-bit and 16-bit modes. In these registers, pre-calculated value for delay is filled. Timer0 can operate as a timer or as a counter. When the clock source is the instruction cycle clock, it operates as a timer and when the clock source is the T0CKI pin, it operates as a counter.

How to calculate hscnd on a PIC microcontroller?

So when count gets 250 (250*2ms = 0.5 second), means that its been half a second so we increment hscnd by 1 and initialize count to zero. So we use this value and compare it to our hscnd and shift our LED based on the user defined time.