- >>>>Questions<<<<:::::
5-29-07
- NOTE I answered the questions that were asked below.
- I tried uploading the firmware with and without the "t" option but it yielded the same result ever time (note 'no AVR' picture below)
- I should also note that I tried uploading firmware to it a long time ago using the AVR program.
5-28-07
Alright, thank you very much, the serial loopback got me back where i was. I removed the t from the -wtE on the upload-firmware12x12.bat file. Now I'm left with this.
Last time I pulled my VEMS out and played with it I managed to get it stuck in bootloader: in the 19200 baud I got "AVREFI1" output.
I didn't play with it too much after that and put it back in its case and back into storage. Now just as of recent I've pulled it back out and really started to get back to work on it and I can't reproduce anything.
I've checked over my serial connections. Describe, how.
- What cable do you use?
I made my own ecu cable out of cat 5 (or it may be older telecommunications wires as each wire is multi stranded) and check for any resistance or shorts from one end to the other.
- What "com-port" is it ?
- Did you the do a successful pin2-pin3 loopback test ? (loopbacking the cable connected to the PC, not to the ECU)
Yes, successful, i get everything i type in back.
- I've tried both the S and the Man commands in both 9600 and 19200 baud and don't get anything, just the little <0> sometimes, so not surprisingly:
- when I try uploading firmware, all I get is "No hello from AVR"
Advice?
Measure a few more things:
Supply voltage and supply current draw of the board
- Supply to the board is 11.05V DC solid from an old computer power supply
Onboard supply voltages, including the 4..5 supply (+5V) of the processor
- I'll have to look through to figure out where to measure that from.
Try ECU serial loopback
- power down
- connect ECU rs232 DSUB9pin2 to DSUB9pin3
- powerup
- TerminalProgram 19200,8n1 say "S" => expect AVREFI1
- now you can upload program with the upload_firmware.bat IF YOU REMOVE THE 't' from the megaloader vems.hex .... Etw command (so Etw becomes Ew, or if it's like "-w -t", than drop the "-t" ) since you are already in bootloader. You'll need the "t" later when you want to reflash normally (firmware running, not in bootloader mode)
- or you can try the experimental v3gui (download from MegaTune page).
This is where my car sits right now, I'm down to some of the last few details for getting it running and one of those hangups is my VEMS V3.2. I've had the controller for a while but have just recently been needing to use it.
My coil pack setup, my only fear with this setup is finding a way to get rotary trailing split to work.
