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

Looks like the use of LED outputs for anything other than the display requires coding. Since that's not something I can do there's that option gone. So, what's left? I will look at the possibility of running without some of the shifter solenoids. Maybe it is possible to operate in 2 or 3 gears. If I...

OK, I've switched the jumpers now so that the LED2 output goes to the EGT2 circuit which is wired to an off-board transistor and out to the Shift Trigger solenoid SR. LED3 output goes to VB1 which is configured to drive the Clutch 2 solenoid SL2. PT6 is jumpered to VR2 for Paddle upshift per normal ...

I think I've taken this as far as I can go. I want to thank everyone for tolerating me while I've been working through it. But as matters stand I do not feel the Mshift can be configured as a full featured controller for the Toyota 8 speed as the code now exists. I have no confidence that I am remot...

I have taken up the study of "C" programming language, as that seems to be my most reliable option at this time, if perhaps also the slowest one. I'm a poor student of programming. I've proven that over and over again in the past. So I know it will be slow going. But, so far I have found n...

Nope, got that wrong too. PT5 and PT0 need to be inputs. all others outputs. So, if I have this right?

Pins:
7 6 5 4 3 2 1 0
binary
1 1 0 1 1 1 1 0
hex
0xDE

So DDRT= 0xDE?

Improper syntax I'm guessing.

Jim

Or would it be 0x5F?

0101 1111
pins
7654 3210

Jim

I have found this by Manjeera Jeedigunta: bset DDRA,$81 ; configure Port A pin 7 and 1 for output From Freescale Mosaic: PORTT is an 8-bit digital I/O port configurable as input or output on a bit-by-bit basis. The PT0-7 signals are available on the Digital Field Header on the PDQ Board. Any or all ...

Thanks, that helps. In this case it would be DDRT. Port "T" has pins PT0-7. From the MC9S12P128 reference manual, DDRT is memory mapped to the 0x0242 location, with the bit numbers corresponding to the pin numbers (Bit 7 = PT7, to Bit 0 = PT0) Does this mean that pin PT5 would be 0x02425? ...

OK, what I'm wondering about this is, does it require revision of the code to output multiplexed signals? I presume you intend to use the existing shift tables and shift logic and output the commanded gear as a numerical output on the digital lines the same as the LED outputs for the gear position i...

John, this is pretty interesting and I will look it over more closely over the weekend. On first look the one thing I would mention is, do not overlook the shift trigger solenoid. I think it is SLT. The transmission will not come out of Limp mode without it. As I understand it, SLT is a PWM solenoid...