Using the JTHW as inputs on the ACC5E with Power PMAC

[pennells]

This seems pretty straight forward as described in the software user manual. It seems that, if I want to use DAT0-DAT7 and SEL0-SEL7 as outputs, all I have to do is:

 

Gate2[0].MuxMode = $FFFF;

Gate2[0].MuxDir = $FFFF;

Gate2[0].MuxPol = 0; //don't really care about polarity at this point

 

Then, toggling Gate2[0].MuxData bits to toggle the output but the output seems to be set high regardless and the read-back value only changes if I change the MuxPol. We did similar functions on LowIo and everything worked as expected but it doesn't appear to work for the JTHW lines. Is there something missing in what we are doing? Do I have to use MuxIo? (Right now, MuxIo.Enable = 0 so I figured that it shouldn't interfere.)

[Sina.Sattari]

We use transceivers on the SEL and DAT lines which are setup for receive (input) by default. In order to set the SEL lines as output, please set:

 

Gate2[0].PartData[1]=1

[pennells]

That does seem to work for the SEL lines (upper 8 bits) but the DAT lines seem to still only work as outputs. I set Gate2[0].PartData[0] to 8 and the DAT lines seem to work as outputs. Is this what I was supposed to and/or allow to do?

[Sina.Sattari]

I missed that you wanted to use all of them as outputs.

 

Yes. The bit 3 of Gate2.PartData[0] controls the direction of the transceiver for DAT0-DAT7 lines and bit 0 of Gate2.PartData[1] controls the direction of transceiver for SEL0 to SEL7 lines.