[avr-gcc-list] UISP and ATtiny15

[Alexander Popov]

Hello!

I've had some problems programing ATtiny15 with UISP:

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  uisp -dprog=stk200 -dvoltage=5 --upload if=irrx.rom --verify -v

AVR Direct Parallel Access succeeded after 0 retries.
Atmel AVR ATtiny15 is found.
Uploading: flash
#Error: Data polling readback status: write=0x08 read=0xff
If device was erased disable polling with the -dno-poll option.
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So I used the -dno-poll option:
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   uisp -dprog=stk200 -dvoltage=5 --upload if=irrx.rom --verify -v \
        -dno-poll

AVR Direct Parallel Access succeeded after 0 retries.
Atmel AVR ATtiny15 is found.
Uploading: flash
#
(total 10 bytes transferred in 0.03 s (347 bytes/s)
Verifying: flash
#flash error at address 0x1: file=0x27, mem=0x00
flash error at address 0x3: file=0xef, mem=0x1f
flash error at address 0x5: file=0xbb, mem=0x17
flash error at address 0x7: file=0xbb, mem=0x08
flash error at address 0x9: file=0xcf, mem=0xff

(total 10 bytes transferred in 0.01 s (839 bytes/s)
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   After this the device was not programmed correctly (a LED on one
   pin had to light, but it wasn't).

   After some tries i found the -dvoltage=3 option fixed the problem
   (my power supply was stabilized 5V). The binary search showed the
   maximum value for which the chip programmed ok was
   dvoltage=4.25V

   I used the ATtiny15L-1PI chip.

   Maybe some increasing of the calculated delay should be done in
   UISP for ATtiny15L?
-- 
Best regards,
 Alexander Popov                         address@hidden
 Master of Engineering