bperrybap / usbasp Goto Github PK
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My repo for experimenting with the usbasp firmware from www.fischl.de
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iugamarian sleemanj dienbk7x denilsongomes harshojha1999 andreljr kevinl8890 ed-ma khjkuo faymaz michalmada biakssusbasp's Issues
which version to use?
Hello,
I used your 1.06 alpha on a usbasp clone some years ago, now i bought a new one like this: https://it.aliexpress.com/item/1pcs-FREE-SHIPPING-ST-Link-V2-stlink-mini-STM8STM32-STLINK-simulator-download-programming-With-Cover/32442061903.html
i see from https://github.com/bperrybap/usbasp/network that a few user gone forward with your code, do you suggest to still using the alpha 1.06?
TPI Fails
Short story, I have not investigated far, ATTiny5
Writing flash with TPI on 1.06a firmware (prebuilt binary) doesn't actually appear to modify the flash,
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e8f09 (probably t5)
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "/tmp/arduino_build_514273/Blink.ino.hex"
avrdude: writing flash (242 bytes):
Writing | ################################################## | 100% 0.32s
avrdude: 242 bytes of flash written
avrdude: verifying flash memory against /tmp/arduino_build_514273/Blink.ino.hex:
avrdude: load data flash data from input file /tmp/arduino_build_514273/Blink.ino.hex:
avrdude: input file /tmp/arduino_build_514273/Blink.ino.hex contains 242 bytes
avrdude: reading on-chip flash data:
An error occurred while uploading the sketch
Reading | ################################################## | 100% 0.10s
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x00ba
0x43 != 0x47
avrdude: verification error; content mismatch
avrdude done. Thank you.
The existing firmware on the target is unmodified (evidenced by the behaviour of the target being that specified by the previous flash contents) indicating that even though it said it wrote flash, it didn't, and hence the verification error.
Usnig the current fischl firmware it works fine.
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e8f09 (probably t5)
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "/tmp/arduino_build_514273/Blink.ino.hex"
avrdude: writing flash (242 bytes):
Writing | ################################################## | 100% 0.91s
avrdude: 242 bytes of flash written
avrdude: verifying flash memory against /tmp/arduino_build_514273/Blink.ino.hex:
avrdude: load data flash data from input file /tmp/arduino_build_514273/Blink.ino.hex:
avrdude: input file /tmp/arduino_build_514273/Blink.ino.hex contains 242 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 0.10s
avrdude: verifying ...
avrdude: 242 bytes of flash verified
Now, beware when testing, the verification in 1.06a firmware DOES work, so if you successfully write the flash with the fischl firmware, then try to write the same flash contents using the 1.06a firmware, it will look like it all worked fine, but it didn't, it still didn't write the flash it just passes verification because it was already written previously. So in other words, every time you do a test, make sure your flash content you are testing with is unique.
add external clock source
hi @bperrybap and @PeterVH
based on the above schematics of the cheap usbasp
looks like that there are some extra pin connected to the 10-pin connector. It would be useful to have one of these pins output a clock source (1mhz, 8mhz or 16mhz). Adafruit and Nick Gammon did the same in Arduino as ISP, please have a look: https://forum.arduino.cc/index.php?topic=112442.0
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