Datasheet 18F – Ebook download as PDF File .pdf), Text File .txt) or read book online. PDA. View Full Version: 18F Quaduature Encoder This change will be notified in a datasheet’s () future update. PIC18FI/P Microchip Technology 8-bit Microcontrollers – MCU 16KB RAM 34 I/O datasheet, inventory, & pricing.

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I use the “Hello World” out the serial port test. An 18F with two pots, a switch, and the FETs with drivers. Beat your head long enough against the wall, and sometimes you find a door.: The switch controls if the output is pulsed DC or cycles both ways. But anyhow,it’s clear enough for me to understand. Yeah this one is a nifty series PIC for sure. That said, there still seems to be a bit of mystery surrounding it’s use, at least to me.

MOVFF is move file to file. I made a few attempts to begin with but could never quite figure datashwet out so I went for my own velocity calcs newPos-oldPos.

18F Quaduature Encoder [Archive] – MEL PICBASIC Forum

This is part of it and not complete yet. Bruce, That’s a super start to a dataseet like me. I don’t have the 18F or Microchip motor control board, but this works on the 18F LowByte hserout [“D”,dec duty,”F”,dec Freq] goto Main ‘ Loop end Like I said, I’m going to have to study my own work just to understand it better, but at least it works like it is suppose to.


What I ended up with was this: Subtract 1 for But,i gotta some problem with the Adtasheet Period value.

Well,it drive me crazy to know about it. How to find this using equation i use this equ since it’s free running mode here.


If you load into the period register, it will generate a PWM frequency of around To work with the 18F I will definately incorporate. Great tip on counter overflow. Basically the module is counter and two comparators.

Any help with the set up code would be appreciated. Now you need to know the PWM resolution to know the range of duty cycle bits. Not the PWM frequency. Copyright c Controlled Surroundings Inc. I don’t fully understand how to plan for it, but I did figure out a relationship in my application and kind of applied a brute force solution.

PWM Glitch on the 18F2331, 18F2431, 18F4331, and 18F4431 for very low duty cycles

Hi Bruce, Sorry if i pester you a lot. Using Darrel’s interupt routines I managed to get motor controller for my robot working, with PID filter and all. The rest seems yeeha as it’s taught in ” MTR” from Microchip.


Thank you in advance. Daatasheet tried, and submitted a support ticket to Microchip. The fact that my frequency and duty had to be changeable made it a bit more confusing for me.

Thanks for the explanation Henrik. I’m not understanding the interaction of the frequency to the Duty.

That concept started to peek through the fog eventually. I haven’t played much with this particular feature. Ramps up, then down.

PIC18F – Microcontrollers and Processors – Microcontrollers and Processors

It should be at least enough to get you started. This ‘is prevented by reading the high byte two times and compare the two readings. It has a CD that conatins source code in assembly.