I'm trying to program ATMega8515's using STK500 and have not had any luck. I've programmed ATMega16's and AT90S8515 OK with 3 Stk500 boards, but get device ID errors with ATMega8515's. I've also looked on the Atmel site, but haven't found the right FM to read. thanks
The "usual" problem with programming AVRs is that they typically (all?) come from the factory set to use the internal RC oscillator as the clock source and that oscillator is typically (always?) set, or divided down, to 1 MHz.
If the STK500's programming clock is higher than 1/4 of that then programming will fail. Check the "settings" button under the Main tab from the STK500 window in AVR Studio.
A good test is to *always* do a signature check before trying to program. If the signature is wrong or cannot be read then something's amiss.
Once you're talking to it reliably, set the fuses as needed if you're using an external clock source or crystal.
Thanks for the reply Perhaps not. I updated AVR studio4, then updated firmware with the version on my harddrive. Where do I find for sure the latest firmware?
Thanks. On all ATMega8515 the signatures read 0x1E 0x93 0x01 with a warning that the signature doesn't match the selected device. On ATMega8515L nothing is readable, neither signature or fuses. The clock is set for 28k Firmware version is 0x020a
An Atmega8515's signature should be 0x1E 0x93 0x06, where 0x1E is the manufacturer (Atmel), 0x93 is memory size (8K), and 0x06 is a sequential code for that memory size.
The signature you're getting is for the older AT90S8515.
When you install a newer version of Studio it will read the firmware in the STK500 and tell you if it needs to be updated, and will do it from within the program.
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