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I/O on 2nd C167?
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Topic: I/O on 2nd C167? (Read 5499 times)
Axis
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I/O on 2nd C167?
« on: April 15, 2013, 05:23:37 PM »
How are input/outputs on 2nd C167 cpu addressed? I need to find such code to identify a map.
And might also want to use it to control external device.
Anyone who can paste some example code from IDA showing how it's done?
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IamwhoIam
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Re: I/O on 2nd C167?
« Reply #1 on: April 18, 2013, 11:05:29 AM »
If memory serves, the 2nd C167 is a port expander, but I could be wrong.
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I have no logs because I have a boost gauge (makes things easier)
Axis
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Re: I/O on 2nd C167?
« Reply #2 on: April 18, 2013, 02:14:33 PM »
I would rather think that they are connected by the SSC (spi) in Master/Slave mode. Though I've not checked the circuitboard for this.
I need help finding how code/routine is used to address the I/O ports on slave device. I can' remember reading about if the slave C167 have the same internal boot rom or another prepared for SPI com.
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phila_dot
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Re: I/O on 2nd C167?
« Reply #3 on: April 18, 2013, 02:36:25 PM »
Doesn't really answer your question, but have you seen this:
http://nefariousmotorsports.com/forum/index.php?topic=198.0title=
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Axis
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Re: I/O on 2nd C167?
« Reply #4 on: April 18, 2013, 04:20:46 PM »
Yes, seen it long before I had the need to identify such code. I Recall Tonys statement that he guessed that it was a watchdog.
It was to some help now when I read it again. I guess that I might get further by finding a few known outputs for which I have known maps.
Thank you
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