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Need help with raspberry pi 2 usb to serial port communication

Thread starter #1
Hi. Currently, I am working on getting the raspberry pi 2 to communicate with my iboard avr via a usb-to-serial-port adapter cable for the main purpose of controlling the dc motors already connected to the iboard avr(atmega16). I have already installed the packages for avrdude and enabled the python serial port on rpi 2.

After installing the avrdude libraries, As instructed, I tried both siprog and ponyser and got the following results:

  1. avrdude -c ponyser -P /dev/ttyUSB0 -e -p m16 -U lfuse:w:0xff:m -U hfuse:w:0xc9:m -F
    avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.10s

avrdude: Device signature = 0x000000 (retrying)

Reading | ################################################## | 100% 0.09s

avrdude: Device signature = 0x000102
avrdude: Expected signature for ATmega16 is 1E 94 03
avrdude: erasing chip
avrdude: AVR device not responding
avrdude: reading input file "0xff"
avrdude: writing lfuse (1 bytes):

Writing | | 0% 0.00s ***failed;
Writing | ################################################## | 100% 0.23s

avrdude: 1 bytes of lfuse written
avrdude: verifying lfuse memory against 0xff:
avrdude: load data lfuse data from input file 0xff:
avrdude: input file 0xff contains 1 bytes
avrdude: reading on-chip lfuse data:

Reading | ################################################## | 100% 0.03s

avrdude: verifying …
avrdude: verification error, first mismatch at byte 0x0000
0x14 != 0xff
avrdude: verification error; content mismatch

avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: Sorry, reading back fuses was unreliable. I have given up and exited programming mode

avrdude done. Thank you.

  1. avrdude -c siprog -P /dev/ttyUSB0 -e -p m16 -U lfuse:w:0xff:m -U hfuse:w:0xc9:m -F
avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.08s

avrdude: Device signature = 0x1e9403
avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: To protect your AVR the programming will be aborted

avrdude done. Thank you.

In both options , I had to include -F to override the signature check otherwise, I was getting this:
avrdude -c ponyser -P /dev/ttyUSB0 -e -p m16 -U lfuse:w:0xff:m -U hfuse:w:0xc9:m

avrdude: AVR device not responding
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.
Overall, the problem now seems to be with reading the lfuse for some reason. Any thoughts?
 

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