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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While Bert’s statement might 18t4431 like just so much talk to some I vouch for his opinion especially if you are moving to 18F chips for the first few times, I had an amazingly difficult time just getting this chip to blink the LED, owing to programmer issues, config issues. Thanks for your code although its in assembly. This ‘is prevented by reading the high byte two times and compare the two datasheet.

Well,it drive me crazy to know about it.


But,i gotta some problem with the PWM Period value. That not only tells me that the program is running, but also that the frequency is correct – something that a blinking LED doesn’t do very well. 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.

I will definately incorporate. First is the same thing that should be first for every new pic, can you blink a led? Using Darrel’s interupt routines I managed to get motor controller for my robot working, with PID filter and all.

I can control the Freq just fine, but it makes a mess datawheet the duty. Isn’t that an awesome controller? I’m using the 18F too.


That concept started to peek through the fog eventually. I’m not understanding the interaction of the frequency to the Duty. I tried, and submitted a support ticket 18f4431 Microchip. Great tip on counter overflow. The switch controls if the output is pulsed DC or cycles both ways.

Thank you in advance. Now, if I 18f4341 just find more time to play with it. On the pin version, forget using RE3 as an input. When the counter starts at 0 the output is set, when it “hits” the value of the first comparator the outputs is cleared and when the counter “hits” the value of dtasheet second compartor the PWM cycle starts over.

Now you need to know the PWM resolution to know the range of duty cycle bits. If you load datashest the period register, it will generate a PWM frequency of around One Pot is for Frequency, the other is for Duty.

I can see that there is a dependency with the PWM resolution, but I’m not sure how to manage it. 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 datasheer is suppose to. What I ended up with was this: It has a CD that conatins source code in assembly.

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

Hi Bruce, Sorry if i pester you a lot. This should be more than enough for me to get started. Could you guide me how to do this. The rest seems yeeha as it’s taught in ” MTR” from Microchip.

CCS :: View topic – Can’t setup_spi2(mode) for Pic18f ?

Beat your head long enough against the wall, and sometimes you find a door.: Bruce, That’s a super start to a beginner like me. It’s a great uC! Copyright c Controlled Surroundings Inc. It should be at least enough to get datasheey started. Yeah this one is a nifty series PIC for sure. Hi, This works for me on 18F, should be the same.


PWM Glitch on the 18F, 18F, 18F, and 18F for very low duty cycles | Microchip

I mean it’s really worth to understand this special function micro which i will face the App soon or later. The more we pound on this and post the results, the better we can get a handle on it. Thanks for the explanation Henrik. I tried according to application note but to no avail. How to find this using equation i use this equ since it’s free running mode here.

See this post http: This is part of it and not complete yet. I was wondering if someone dataaheet done same thing in pic basic i. Equation ‘as shown in the data sheet’ doesn’t produce the same figures for PWM resolution shown in Table Resolution is the number of bits you have to control the duty cycle.

Any help with 184431 set up code would be appreciated. I never managed to get QEI module going in velocity mode. I am a bit confused. The Quadrature-Encoder isn’t very strange Here is my code.