Flashhack - New LT1 flash tool

[steveo]

The timing is real tight here I did some calculations and with 8192 baud a byte is send for 0.9765ms.

yep i've pretty much called it 1ms for most purposes. so with an 8ms gap, you need to transmit in the first 4ms or it wont survive.

eehack does use a mode 8 request for bus keepalive or to check if the ecm is alive

this new tool is more procedural, it runs through an entire procedure without pausing, but before each packet it checks for up to 10ms to see if there's any crap in the buffer, and if there is, it tries to look for that bus master heartbeat packet thing again. so it's constantly checking to make sure it's still bus master

with an fbody, three requests 30ms apart always seem to land properly no matter when you start. garydoug that wrote scan9495 taught me that trick.

[steveo]

alright i have three methods i'm testing.

i'd love it if my two current test cases (nomakewan and sherlock) would test all three, i'll have them ready tonight in form of three buttons you can click, it'll tell us how long to connect, and how many attempts, then reset the bus master after, so you can try multiple attempts.

[Grizz1118]

My cable will be here today if you need me to try it I can as well

[NomakeWan]

Sounds good, can't wait!

I know you mentioned not wanting to do it, but I'd also be willing to test method four--the custom driver. I understand it's not practical for general use, but if that ends up being what it takes, I don't think it's unreasonable to note that Corvette guys would just need to go for a specific cable and use a specific driver. That is, if one of the three doesn't do the job.

[steveo]

nah i don't want you vette guys to run nonstandard drivers. i have written for libftdi before and it's great but you literally have to make your cable only work with libftdi. there's some hacky driver switching tool out there too.

if you haven't noticed, a lot of people tuning old gm stuff aren't too computer savvy, so i don't want to make my user base do things that'll just result in me having to teach them individually.

i think we'll find a method that'll work for everyone, although i'm thinking there's a chance you'll average around 10 seconds for initial connection time even with an ideal method.

just out of curiosity, what tools have you used that do connect reliably to your vehicles?...

[NomakeWan]

just out of curiosity, what tools have you used that do connect reliably to your vehicles?...

TunerCats works...up to a point. The program itself (GUI?) puts such a load on my netbook that after a little while the screen can't refresh fast enough and it falls out of sync and pegs the processor to 100%. If I set it to only record a log and not display anything it's fine, but that's not particularly useful. WinFlash works perfectly, though as I've pointed out in logs before, it's using an incredibly aggressive method to get through noise on the bus (just keep ramming data through until you get a response that matches). EEHack works perfectly on my '95, but doesn't work properly on my '94. Still haven't been able to figure out why.

Haven't tried TunerPro RT yet.

[94MI9C1]

Steveo,

Send me a message on here on what you need tested on a bbody platform, I haven't had the chance to read the whole thread. Just let me know

Thanks

Mike

[steveo]

My cable will be here today if you need me to try it I can as well

yes please! more data the better