MSgpio.com read only forums (Jan.15,2018)

Am having issues making the Spare2 output work. I can not get it to turn on. When I measure the voltage at the personality header, it measures zero volts ( at the output of the CPU). Want the output to turn on when VSS < 5mph. See attached msq and let me know if anything looks wrong. Thanks.

mill3833,

I will have a look. However, 4.145 code is now obsolete. The current release code is 5.101, and any fixes would be applied to that code, not the 4.14x series of codes. So I suggest you upgrade to 5.101 (here: http://www.msgpio.com/manuals/mshift/V5code.html ); it might solve your issue (it had some fixes to the spare port logic). You would have to upgrade to get any particular new fixes for your issue anyhow.

Lance.

Lance,

I loaded up the 5101 sw, same issue.

I removed the personality header, and placed a scope on the CPU side of the Spare2 pin. In the active state, the port is producing a low duty cycle square wave. 10 ms period, the on-time is 250 us. When I clear the condition it goes to zero volts. I also checked the down stream circuitry, the power transistor, and that all is working as expected.

So it is acting like that port is acting like a PWM port, but I'm pretty sure I have it set up as on/off.

If you could look over my msq, I'd appreciate it!

Again, I want Spare 2 to simply turn on when VSS < 5mph and off when greater than 5 mph.

Thanks,
Dave

Dave,

The spare port 2 *always* uses the PWM 1x12 table for the ON values. If you want the spare port to be "ON/OFF", you need to set the entire table to be equal to 100% under 'Spare Ports -> Spare Port 2 PWM Percent'.

The spare ports were done this way to make them more flexible without changing the previous on/off settings (i.e. you can have PWM, but you can also use the table as an additional control element, say 100% PWM for speeds <5mph AND speeds >100mph for example).

Lance.

That did it.
Thanks.

Dave

Well, let me clarify. That worked for the 5101 SW, but not for the 4145 SW.

I rebuilt the 4L60E this winter and was wanting to try it out with the 4145 SW (what I ran last year) to make sure it shifts ok, etc, before switching to new SW. I can live without Spare2 not working (use this as a trans-brake interlock) for the test drives.

Just curious what's up with 4145.

Dave

Dave,

I looked in the logs, and it looks like there was an a couple of errors in the spare port 2 (in the conditions and the indexing) and these were fixed sometime between 4.145 and 5.014.

Of course there were a *lot* of other changes between the 4.1xx and 5.0xx codes; these were probably the biggest architectural changes since the code was started.

Lance.