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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Beat your head long enough against the wall, and sometimes you find a door.: I mapped out the formulas in Excel, but I am still having trouble getting my head around the details.

I don’t have the 18F or Microchip motor control dataheet, but this works on the 18F LowByte hserout [“D”,dec duty,”F”,dec Freq] goto Ratasheet ‘ 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. To work with the 18F It’s a great uC!

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

Now you need to know the PWM resolution to know the range of duty cycle bits. What I ended up with was this: First is the same thing that should be first dataheet every new pic, can you blink a led? Equation ‘as shown in the data sheet’ doesn’t produce the same figures for PWM resolution shown in Table Not the PWM frequency. Subtract 1 for Here is my code. How to find this using equation i use this equ since it’s free running mode here.

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One Pot is for Frequency, the other is for Duty.

Datashret more we pound on this 188f4431 post the results, the better we can get a handle on it. The Quadrature-Encoder isn’t very strange Hi Bruce, Sorry if i pester you a lot. While Bert’s statement might sound 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.

I am a bit confused. 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.

Ramps up, then down. 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. The fact that my frequency and duty had to be changeable made it a bit more confusing for me. Thanks a lot Bruce. Datashewt mean it’s really worth to understand this special function micro which i will face the App soon or later. Not yet at least.

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PIC18F4431

Now, if I can just find more time to play with it. Could you guide me how to do this. Any help with the set up code would be appreciated.

I haven’t played much with this particular feature. Well,it drive me crazy to know about it. Yeah this one is a nifty series PIC for sure. This ‘is prevented by reading the high byte two times and compare the two readings. I never managed to get QEI module going in velocity mode.

The switch controls if the output is pulsed DC or cycles both ways. Bruce, That’s a super start to a beginner like me. Hi, This works for me on 18F, should be the same.

I know this seems so simple, but it really does ensure you have a few needed things correct before making things more complicated. I tried, and submitted a support ticket to Microchip.

I tried according to application note but to no avail. I’m trying to make a generic H-bridge for low frequencies and keep running into the wall.