PIC and USB - HELP !

[Lebeng]

Hello everybody...

This is my first post, I've newly registered to this forum.
I have been using PIC 16F877, until i wanted to do a simple application with USB interface. After searching, i found that the PIC18F4550 can do USB interfacing, but i have no idea about using this feature.

The application i'd like to do is simple. for example, just to send data from the PIC to the computer and vice versa.

Can i get any help?

 

[blueroomelectronics]

The 18F4550 is well suited as a USB client. Search other posts here for it.

 

[Pommie]

Have a look **broken link removed**.

Mike.

 

[Lebeng]

Thank you Mike,

Im sorry for bothering. the pic code supplied is written on C compiler. iam not familiar with writing such codes i have used on PIC BASIC. do u have any idea about configuring USB on PIC BASIC?

 

[blueroomelectronics]

The retail version of Swordfish BASIC has a USB module, I'm not sure if PIC BASIC does.

 

[Lebeng]

This is a confusing subject ! It seems it is difficult but ill not give up

 

[Nigel Goodwin]

This is a confusing subject ! It seems it is difficult but ill not give up

First thing, dump BASIC - much as I dislike it, C is the way to go on the 18F series, particularly for USB.

 

[blueroomelectronics]

Have you tried Swordfish? It's a modern structured modular language not some ancient BASIC like the old Commodore PET.

 

[Nigel Goodwin]

Have you tried Swordfish? It's a modern structured modular language not some ancient BASIC like the old Commodore PET.

I've no problem with BASIC of any kind, and modern BASIC's are more like Pascal (my language of choice) than BASIC anyway.

But while assembler is the preferred language for 16F series, C is the preferred language for the 18F series - even though I don't like C. This is simply based on what MicroChip provide for free, and what their application notes are written using.

 

[blueroomelectronics]

It's funny. I can program in Pascal but C I'm just a beginner.

 

[Nigel Goodwin]

It's funny. I can program in Pascal but C I'm just a beginner.

Same here, I've never got on with C, I even bought the very expensive lattice C compiler for the Amiga, and never managed to do anything with it - luckily a friend bought it of me, so I didn't lose too much.

 

[Lebeng]

Ok people , who will help me to start learning C for PIC?
I'm a good C programmer, but have never tried to write a PIC program on C and i dont even know the program structure, do any have info about how to start?

 

[blueroomelectronics]

Start by downloading C18 SE and reading the example code for USB from Microchips site.

 

[Pommie]

Microchips sample USB code is so vast and spread over so many files that it is almost impossible to figure out what it is doing. Look at the link I posted earlier, that contains 2 files rather than the 57 that Microchip supply.

Mike.

 

[atferrari]

Hi everybody in the thread!

I hope this is not hijacking it. I've read a lot on the matter and two expression are puzzling me a lot: "framework" and "stack".

Could anyone explain them when used in the current context?

Does it apply to, for example, TCP/IP stack, .NET framework?

Confused to say the least.

 

[ESchemainda]

Don't worry ..

Don't worry about this expressions. They don't attach much importance. Replace them in mind with a "set of programs or routines" belonging together for a particular purpose. Only advertising slogans.

 

[Lebeng]

Have any body heard about PROTON + ?????

This is a simple PIC programming language, How is it with USB ?

 

[philba]

I hope this is not hijacking it. I've read a lot on the matter and two expression are puzzling me a lot: "framework" and "stack

Framework is a general term for a set of code and data structures you would use to build an application. Think of it as the bones of an application, You add code to "personalize" it to your needs. Like microsoft .NET framework. The idea is that all the common code is already done and you just have to add the parts that are specific to your application.

A stack generally refers to an implementation of a layered communication protocol but can reply to other layered things as well. You will hear people talk about a TCP/IP, USB or Bluetooth Stack. That simply means the code you will use to talk over TCP/IP, USB or BT.

 

[Lebeng]

Hello Again, I found a different PIC that can perform USB connection PIC16C745 I think dealing with this PIC is simpler, and the Help of PROTON IDE includes information about.
I have read the term "Descriptor" can anybody figure out the meaning of this expression?

 

[blueroomelectronics]

Don't bother with OTP PICs like the 16C745 unless you're doing a production run.