Electroinc n0b question. programming a avr board...

x in the city

Hi Guys,

I got this can bus dev kit with an atmel mpu.

I need some jtag programmer or ISP to actually send hex files to the mpu..

I thought this could be sent across from the serial cable itself and done on avr studio?

Just need to double check...!

DublinDilbert

x in the city wrote: »

Hi Guys,

I got this can bus dev kit with an atmel mpu.

I need some jtag programmer or ISP to actually send hex files to the mpu..

I thought this could be sent across from the serial cable itself and done on avr studio?

Just need to double check...!

I'd be surprised if the Dev kit didn't come with some way of getting the code onto it. A lot of dev kits will have a serial boot loader on the chip that will allow code to be downloaded over serial/can/usb interface.

But if you have a blank CPU there's generally 2 ways to get code onto it:-
JTAG ICE USB programmer / debuuger
AVR ISP Serial Programmer

gotBass

What kit is it?

I got the STK 526 a while back
The programming is via USB as the AVR has bootloader in place.

x in the city

Its this

http://uk.farnell.com/atmel/atdvk90can1/development-kit-avr-at90can128/dp/1455089

can anyone confirm that I need an external programmer>? or can I do it via the serial (well actually a usb as I got an adapter)


thanks lads.

delux

You can only do it over serial if the chip already has a bootloader programmed into it, does it? I doubt it would.
Otherwise you do need an external programmer. Why? because there is a special procedure required to enter programming mode and clock in the data. It avoids accidental writes to the device when it's released. There should be a document called a programming specification for the device which explains this.

x in the city

The manual just mentions the AVRIsP programmer, or the JTAG or STK kit, none of which I got....!

I dont know about a bootloader..?

DublinDilbert

x in the city wrote: »

The manual just mentions the AVRIsP programmer, or the JTAG or STK kit, none of which I got....!

I dont know about a bootloader..?

Sounds like you need a programmer... The AVRisp one is quite cheap about 30 euro or so, but you need a hardware serial port (not a usb converter). The STK500 is a very old demo board from them that can program devices. The Jtag ICE is about one hundred euro...

x in the city

I got a serial > usb...

this wont work? It was quite expensive and I thought it would work, is there a way to see that this recognises the can board ?

or do you mean that it wont work with a AVRIsp? (which is on its way)

DublinDilbert

x in the city wrote: »

I got a serial > usb...

this wont work? It was quite expensive and I thought it would work, is there a way to see that this recognises the can board ?

or do you mean that it wont work with a AVRIsp? (which is on its way)

the Serial > USB might work, but might not. The best thing is to try it.

Why not just get one of these:-
http://cgi.ebay.ie/NEW-Mini-ATMEL-AVR-ATMEGA-STK500-USB-Programmer-ISP_W0QQitemZ220571211596QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Supplies_ET?hash=item335b11974c

x in the city

Thats on its way.....!