is there any circuit to directly program pic18 from computer? (without using a PIC burner). I need one that are connected to the PIC18 directly.

 

Any circuit used to connect between PC and MCU to program it,is called a programmer or if the mcu is of Microchip's PIC then you may call it PIC burner.

Link : http://www.oshonsoft.com/picprog.html
Also download the application software and use it to program your mcu.

And if you have any plan to buy any programmer then I will prefer Microchip's ICD3.

Good Luck

 

Another thing

is there any circuit to directly program pic18 from computer?

If you are asking about any circuit that do not use any active device then yes their is ,but for that you need Low Voltage Programming (LVP) option in your mcu.You can program a mcu using 4 wires ,two resistor and a 5 volt supply.But this way is not good enough,first of all the LVP bit should be already on to do this if its not turned on then nothing can be done.Using LVP you loose one pin of your mcu.And at last I found its very problematic many times it works and many times it doesn't.

 

is there any circuit to directly program pic18 from computer?

No. There will always be some hardware involved.

Some devices have "bootloaders" installed, code that can load other code. A PIC18 could get the program over a USB which has the least hardware but still a few items.

 

jackrabbit can be connected directly to pc right? i need the example circuit to make the pic to work just like the jack rabbit >.< . A circuit that can be connected to the pic directly. Coz it will be hard to program if i need to take out the pic regularly, afraid the leg will be broken >.< . Early thanks for your help

 

what kind of compiler does the http://www.oshonsoft.com/picprog.html use? does it support c programming?

 

Just buy a PICkit 2 or 3 -- you connect them to the PIC and program them without removing them from your circuit. Easy and foolproof. You just have to make sure you have the requisite pinouts or places to connect clips. About $50 and it works after a simple installation. I can't imagine dorking around with anything else.

 

does it support c programming?

 

They don't care what you use as long as it can compile a hex that programmer loads into the PIC chip.

C, basic, Jal, asm and pascal there programming languages that get complied into a hex that you programmer then loads into the chip.

The hex is bytes of 0 and 1 that the chip can read and run.

 

does it support c programming?

Not only does a PicKit support C (actually it is completely unaware of what wrote the code files it transfers) it can program your device while it is wired into the board where it gets used, it can power small boards, and can also act as an active debugger, allowing you to step thru the code and see what is happening.

Geeze, what else do you want from it?

 

thnks ErnieM...

 

Programmer don't support any programming languages They just load HEX files or bin files

The pickit2 or 3 is a good programmer and debugger. But you can't write C with it

You use hi-tech , boostC or mikroC and there more. They make a HEX that you can then load with a programmer

 

Programmer don't support any programming languages They just load HEX files or bin files

The pickit2 or 3 is a good programmer and debugger. But you can't write C with it

You use hi-tech , boostC or mikroC and there more. They make a HEX that you can then load with a programmer

so, i need to use mplab c compiler right?

 

Yes if you want to use C

C18 is for 18F chips
Hi-tech is for 16f and 18f and 12F chips
BoostC is real Good and is for the same chips as Hi-tech
Mikro C is what i like using

Grab one and find what programmer you want to use and start pic'ing
Start here http://www.microchip.com/stellent/i...E&nodeId=1406&dDocName=en019469&part=SW007002

 

lastly.. what is the best compiler @ programmer and the most popular one out there for pic18...

 

what kind of compiler does the http://www.oshonsoft.com/picprog.html use? does it support c programming?

Yes it does,you just compile your program in any C compiler (I use HI TECH C) and then load the hex file into the application software of the programmer and burn it into the chip.

lastly.. what is the best compiler @ programmer and the most popular one out there for pic18...

For me its HI TECH C under MPLAB.
Good Luck

 

lastly.. what is the best compiler @ programmer and the most popular one out there for pic18...

I prefer the compiler from Microchip: MPLAB C Compiler for Academic Use It is a "lite" version meaning some of the advanced code optimizations are not available, otherwise it is unencumbered and you also get rights to it's output for business use.

However: "NOTE: There is an IDE interaction problem with v3.39a, we will be posting 3.39.01 shortly. We apologize for any inconvenience. "

So you'll have to wait a day or several till it is once again available. There is also an awesome Microchip Application Library (MAL) available that gives you plenty of sample application code. I've taken them several times as a staring place to use as the backbone of programs that use the UBS bus and also an SD storage card.

And they are all free.

 

thanks all
i realy appriciate it...

 

The compiler from Microchip: MPLAB C Compiler for Academic Use is now avalilable. Looks like they skipped over v3.39.01 and went right to 3.40.

I would grab the standard version.