Commit Graph

5 Commits

Author SHA1 Message Date
Doug Brown
0a52df645a - Fixed stupid bug of -1 instead of +1 in external_mem.c.
- Began writing an electrical test so I remember WTF I'm doing later
2011-11-27 00:09:29 -08:00
Doug Brown
1595c69890 OK -- so I separated the actual port code from the external memory controller code. I think this makes more sense.
It does add some complexity to the code. I may be going through a chain of calls just to turn the CS pin on, for instance. Hopefully I'm not going too crazy with this.

Anyway, this means that I can control the ports from a SIMM electrical test routine using the same types of functions that the actual programming  controlling code would use, without having to duplicate a bunch of port definitions and bit manipulation. I made sure to add all the functions I can think of needing to the ports module. We'll see if I got them all!
2011-11-27 00:01:29 -08:00
Doug Brown
4c51019e30 Moved the common "read/write register A and B together as a 16-bit
value" functionality into a read function and a write function. Also
added ability to set pull-ups.
2011-11-26 22:17:17 -08:00
Doug Brown
34438a898e Oops -- I had assert and deassert backwards. 2011-11-25 23:12:58 -08:00
Doug Brown
407f6831a9 Initial import of my test code for the SIMM programmer board. Right now
it contains an (untested) MCP23S17 driver complete with AVR SPI support,
and an (untested) external memory interface driver that uses it.
2011-11-25 23:10:30 -08:00