Pic18f2455/2550/4455/4550

[jukeman]

Hello,

I'm new so go easy!

My question is on the PIC18F2455/2550/4455/4550 series of pics if the usb is handled as usb or if it is usb in and treated as serial for the firmware on the micoprocessor. What i want to do that's easy for me is write my code in Visual Basic for the computer and use serial code then use a usb serial port driver to send the info over the usb cable.

I already have a setup with a controller board now but the processor is serial with usb circuit to serial.

Thanks for any help and suggestions!
Kevin

[skimask]

Hello,

I'm new so go easy!

My question is on the PIC18F2455/2550/4455/4550 series of pics if the usb is handled as usb or if it is usb in and treated as serial for the firmware on the micoprocessor. What i want to do that's easy for me is write my code in Visual Basic for the computer and use serial code then use a usb serial port driver to send the info over the usb cable.

I already have a setup with a controller board now but the processor is serial with usb circuit to serial.

Thanks for any help and suggestions!
Kevin

Did you do any searching at all on this site for anything relating to USB?
Did you even try to find the slightest example of the simplest application using USB, a PIC, and Visual Basic?
Did you even think about trying to do any work yourself?
Anything at all?
The link below took me approximately .0000000000000000000001 seconds to find on this site using an appropriate search phrase.

http://www.picbasic.co.uk/forum/showthread.php?t=5418

Amazing isn't it?

[jukeman]

All i can say is WOW!

I can't see the message because i went blind about a year ago, i have an associate that helps me with my electronics projects. He looked over the material but being new to microprocessors and the forums he could not get a answer to my question. It wasn't evident to do the search.

Sorry if i have upset anyone!
JM

[vacpress]

Skimask - for shame, really.. that post you directed the chap to isnt even appropriate - please reserve your bad attitude, why are you here if you cannot tolerate questions?

i dont know all the correct terminology, but, in answer, the PIC18F2455/2550/4455/4550 chips handle usb 'natively'. they have built in hardware USB ram and other features to support usb. They are different from an FTDI type RS232 to USB chip. However, the PIC chips can be made to emulate the functionality of the FTDI chips using firmware from microchip.com.

checkout the datasheets.. the first few pages are easiest to understand for a beginner, and list the features.. as you learn more, it will begin to make more sense.

the microchip website (www.microchip.com) has preixisting firmware to make a 4550 or similar USB PIC into a serial device.

If you want an easy path to experiment with USB on a pic, perhaps the microchip pic usb demo board would be usefull. It is only $60, which isnt bad for a demo board, and it looks like 'fun', almost.

the link that you were directed to was also very usefull for me to get started with usb and visual basic. this uses the HID driver which is included in most operating systems. this saves you having to write a dedicated USB driver, which is apparently very difficult. Please search google for HID. Or, just goto wikipedia..

If you have any specific questions feel free to ask, i am not very well versed, but I did spend alot of time figuring out how to get basic usb stuff going, and would be happy to try and help.

goto google, search '18f4550 USB picbasic pro'

let your text to speach software lull you into a stupor while you try to digest all the info for usb.. i had to read quite alot of the usb spec to understand what the software was doing..

also, check www.mecanique.co.uk - the provide a program that makes it much easier to implement usb..

do some reading, and come back - people here are quite helpfull if you give them a specific question.. they really hate naive requests for 'general info' - they dont always consider how dense the subjects are for a beginner!

Robert

[jukeman]

Thanks for the response!

By the way i am not blind and just said that so he would feel bad for being so rude. It's nice to see there is still some half way decent people out there. And if your offer still stands i may ask for help sometime!

I noticed he knew about the post because he was running the post with questions like a little beginner!


Where can i find the pic18f4550 demo or protoboard i have looked on microchips site and melabs and can't find it anywhere?


Sorry for the feel bad post!
Kevin

[bbarney]

here you go junkman
http://www.microchip.com/stellent/id...wwPICmicroDemo

Skimask
You gotta get out of the cabin more your starting to get the fever

[vacpress]

please stop acting silly. if people cannot be civil on web boards about a shared interest, where can i go for intelligent discussion of technical things? this seems to be more and more common on these boards.. digression can be charming, but only if it is charming digression...

http://www.microchip.com/stellent/id...&part=DM163010

there. it was in the 'conectivity demo boards' section...

really. have you got a working carrier circuit? have you got a programmer? have you got a cut USB wire or a USB protoboard jack? How close are you to actually working with usb?

USB the first time reminds me of parallel port the first time like 5 years ago.. it seemed so difficult. just read some.. get interested in the technical details you 'dont even have to know to do the job' if you ever expect to be good at anything!

skimask has seemed helpfull in other threads.. it must just have been a bad day.. please stop fighting!

[jukeman]

What did i do to you that you think you can give me this much crap. First off for anybody posting read my post, it was asking Vacpress about the board not either one of you. Yes i saw that board, i'm not retarded. It's not the one that Vacpress was talking about(read the posts).

You know I think you just want someone to fight with, well go beat the hell out of your wife for a while and leave me alone!

I just figure it out, Your dad was a drunk and used to beat the hell out of you, someone sexually molested you or kids at school used to pick on you. So you think you can take it out on everyone else because they can't see you or get to you! Would you like to talk about what happened(who cares).

Dude you got some real issues!

Here is what i see going on with any of you on this forum that wants to act like a--h---s is you must feel threatened that someone is going to learn something fast and something you don't know.

I will be contacting the forum admin and letting him know the pure rudeness on this forum!

Shimass, I'm done with you, so if you don't have anything good to say then don't post.

By the way Bbarney it's Jukeman not Junkman!

You want to see my projects then you can check them out here:
www.freewebs.com/artdecojukebox

I will just find another forum i don't have time for this trying to make me feel stupid chit chat!
Thanks Vacpress! seems like your the only level headed one here!
Kevin