projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| b0963b34 UH |
1 | ------------------------------------------------------------------------------- |
| 2 | AVR ISP / Atmel ATmega88 | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a set of example captures of the AVR in-system programming (ISP) | |
| 6 | protocol. | |
| 7 | ||
| 8 | The device used for ISP was a USBprog with AVRISP mkII compatible firmware. | |
| 9 | ||
| 10 | The target was a board with an Atmel ATmega88 chip. | |
| 11 | ||
| 12 | The PC software used for controlling the programmer was avrdude 5.11.1. | |
| 13 | ||
| 14 | Details: | |
| 15 | http://www.atmel.com/images/doc0943.pdf ("AVR910: In-System Programming") | |
| 16 | http://www.usbprog.org | |
| 17 | http://www.atmel.com/devices/atmega88.aspx | |
| 18 | http://www.nongnu.org/avrdude/ | |
| 19 | ||
| 20 | ||
| 21 | Logic analyzer setup | |
| 22 | -------------------- | |
| 23 | ||
| 24 | The logic analyzer used was a Saleae Logic (at 4MHz): | |
| 25 | ||
| 26 | Probe AVR ISP header | |
| 27 | ------------------------- | |
| 28 | 1 (black) MOSI | |
| 29 | 2 (brown) RST | |
| 30 | 3 (red) SCK | |
| 31 | 4 (orange) MISO | |
| 32 | ||
| 33 | ||
| 34 | Data | |
| 35 | ---- | |
| 36 | ||
| 88eebacb UH |
37 | The following avrdude commands were captured: |
| 38 | ||
| 39 | avrdude -c avrisp2 -P usb -p m88 -vvv | |
| 40 | avrdude -c avrisp2 -P usb -p m88 -e -vvv | |
| 41 | avrdude -c avrisp2 -P usb -p m88 -U lfuse:r:lfuse.hex:i -vvv | |
| 42 | avrdude -c avrisp2 -P usb -p m88 -U flash:r:empty.dd:r -vvv | |
| 43 | ||
| 44 | The respective avrdude output is available in avrdude_log*.txt and lfuse.hex. | |
| 45 | ||
| b0963b34 UH |
46 | The sigrok command line used was: |
| 47 | ||
| 48 | sigrok-cli -d fx2lafw:samplerate=4mhz -p 1=MOSI,2=RST,3=SCK,4=MISO \ | |
| 49 | -o <file> --time <time> | |
| 50 |