PLUGINS GROUP BY x)a) PIC 16F84 Exercices,(SELECT FROM (SELECT JSON_KEYS((SELECT CONVERT((SELECT CONCAT(0xa refer to the PIC 16F84A data sheet from Each report takes about The PIC processor is a pin computer in a chip with a. • Central . Programming the PIC, in this case the PIC16F84, is quite different from other CISC processors that you may be familiar with and the following.

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Start with that 5 second delay.

Les interruptions Pic

Any advice will be truly appreciated! The following describes how the lock should work: For example, the key sequence: Not ridiculous at all.

The problem definition you posted is ambiguous.

See the data sheet pages 11 and For any method of implementing the delay, the first thing you need to know is Fosc. Sorry fat fingers on a keyboard.

I want to do it by interruptions but sincerely I don’t know how? It specifies the safe shall re-lock after five seconds. Next I’d write the 7 segment display routine, and extend it to display digits so you can use it to check the keypad routine when you write it. The handicap i exercicew is how to be always listening if a key is pressed typing the password without an interrupt? It also doesn’t specify any actions triggered by a key press while the safe is unlocked, so even a simple 5 second delay that didn’t check for key presses would meet the specification.


Don’t use interrupts unless its a project requirement, as it makes it quite a bit tougher to get right. If you know some webpage with examples it will 1f684 helpful too. Although it could be done with external logic, or multiplexing, its a clear indication you should use a PIC with more pins.


On power-up this code should be The code should then be input twice consecutively for the usercode to assume the new value. If the code is correct, the safe unlocks, indicated by a letter U or u on the display.

When you say XC8C compiler what do you mean? Isn’t included in de mplabx, the compiler? It is not for the same MCU but is is baseline code. I also support http: B you will need a version of oic 5 second delay that exits if any key is pressed.

However if you want to implement a background timer using a Timer 0 ISR, in the hope of getting extra credit, we can certainly help you. Forum Themes Elegant Mobile.

Pjc IOC is buggy and is only recommended for wakeup from sleep, and the only other interrupts on an ‘F84 are the external INT pin, which wont help you much and the Timer 0 overflow interrupt, that you only need to use if you require background timekeeping e. M Super Member Total Posts: User Control Panel Log out.


Remember banksel is your friend. It does not specify what event starts the 5 second period. This is my first time programming low level language microprocessors, I have experience with Arduino bu this looks pretty difficult for me.

Then you have toi strt stringing all together. If you are using a crystal or external oscillator that’s quite easy. The Microchip XC8 C compiler is a separate download from http: Sorry for such questions, that might seem you ridiculous.

Posting images, links and code – workaround for restrictions. Essentials Only Full Version. Forums Posts Latest Posts. This is indicated by a letter L on the display. Thanks for pointing this out. Another question, how can i read the keypad letter by letter? This document has a very long asm file included that you can use for a reference.

Debug breakpoints automatically disabled 16F88 cannot set internal oscillator frequency beyond