Doug Brown
e38269f879
Optimized the SIMM electrical test, fixed a few small bugs I had introduced in the previous commit. Added comments where necessary. Seems to work great now.
2011-12-18 14:55:08 -08:00
Doug Brown
a1ca591d60
The same short is never repeated twice with the same 2 pins now. However -- if there's a short between 1, 2, and 3 -- it will still show a short between 1 and 2, 1 and 3, and 2 and 3, even though that info is somewhat redundant. But the host software can iron all that out.
2011-12-18 14:18:49 -08:00
Doug Brown
9333b65cde
Fixed a tiny mistake -- forgot to say the name of one of my enums after the typedef.
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Finished making the electrical test work -- I had failed to realize that I have to ignore the ground shorts once they have been found -- otherwise they reappear against EVERY tested pin (because they are always low and I'm testing for low pins -- duh!). Anyway, it was showing way too many shorts, and that's why. Now I independently can find shorts between separate pins without getting flooded with the ground shorts too. Only thing that's missing is the VCC shorts, but I can't do that without pullups (to my knowledge)
2011-12-18 12:00:22 -08:00
Doug Brown
beae025d1a
Oops, I was counting too many errors
2011-12-18 10:19:57 -08:00
Doug Brown
9054aaff0f
Started implementing electrical test that tells what pins are shorted to what
2011-12-18 10:18:30 -08:00
Doug Brown
52d33e077f
Broke out the SPI read/write into a single routine. Less code repetition -- easier to read and smaller.
2011-12-17 13:43:12 -08:00
Doug Brown
540e04331a
Fixed the ordering of the chips -- I had the bytes reversed. Now, when I write/read a continuous stream of data, the bytes will correspond with the correct chips.
2011-12-17 11:18:56 -08:00
Doug Brown
b052bb62f8
Fixed a bug with how many bytes I was allowing to be written. It mostly works but it writes the chips in reverse...oops
2011-12-17 10:32:40 -08:00
Doug Brown
ca84a1d562
Kept working on the USB protocol
2011-12-16 20:13:34 -08:00
Doug Brown
4f0d1a894c
Optimized some of my routines and fixed a nasty, nasty bug that was causing the board to crash because of multiple things being outputs simultaneously.
2011-12-13 21:56:20 -08:00
Doug Brown
4adb0c4980
Started working on more optimizations, but something weird is happening and it's crashing...not sure why yet.
2011-12-11 21:48:26 -08:00
Doug Brown
1c07518ab0
Added electrical test option to my temporary command line.
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Also experimented with skipping the SPI -- I left my test code in there, commented out, in case I want to do some more speed testing.
2011-12-11 15:52:04 -08:00
Doug Brown
7099218bf1
Added some optimization to remove the 1us delay on the write pulse, but I'm not sure that it matters much.
2011-12-11 13:45:17 -08:00
Doug Brown
b4eb6c3ddc
Started getting writing working, as well as the ability to restrict to a specific set of chips to write to
2011-12-11 13:28:32 -08:00
Doug Brown
e0977a9339
Created read and write cycle functions, along with a block read function. I think this will look better...
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I also changed the port module so it doesn't needlessly update the data direction register over SPI if it's being told to set the same value it had before.
2011-12-11 10:12:22 -08:00
Doug Brown
f45cc2c4d6
Started writing more command handling
2011-12-11 08:35:53 -08:00
Doug Brown
651c3a4be7
Finished testing the new functions I made for chip identification. It works well
2011-12-10 18:57:17 -08:00
Doug Brown
8865d0c00f
I got the device identification working, and I'm in the middle of breaking it into its own set of functions for write cycles, read cycles, unlock sequence, etc.
2011-12-10 18:40:30 -08:00
Doug Brown
1540bcadd1
Tested reading the entire SIMM contents back to the computer (it works)
2011-12-10 13:53:43 -08:00
Doug Brown
7db22e08af
Fixed a few stupid bugs -- it's now reading data correctly.
2011-12-10 13:02:21 -08:00
Doug Brown
2bc61f41aa
Continued playing with USB serial stuff. I think it's working well now, but I'm running into problems reading from the SIMM, so I need to figure out why I'm not getting the data I expect.
2011-12-10 10:35:41 -08:00
Doug Brown
1db6834da4
Added LUFA into the project, right now just for some demo stuff.
2011-12-09 22:11:31 -08:00
Doug Brown
f5bf5fed36
Commented the change I made to the DDR bit convention
2011-12-07 21:41:50 -08:00
Doug Brown
918b615654
Oops! the MCP23S17's DDR is backwards from the AVR. 1 = input, 0 = output. After swapping them, my electrical test is working!
2011-12-07 21:30:42 -08:00
Doug Brown
b475c28040
Fixed a bug in the address line tests, updated fusebits for now [with no bootloader yet], started working on getting all the tests working
2011-12-07 21:17:47 -08:00
Doug Brown
bfeadc7e3a
I had forgotten to check the control lines for ground shorts.
2011-12-04 17:09:57 -08:00
Doug Brown
65c6654660
Added delay "adapter" class to keep simm_electrical_test.c completely platform-independent.
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Updated the electrical class to wait after setting up pins before reading them.
2011-12-04 16:30:26 -08:00
Doug Brown
fc44d70c4f
Finished writing the electrical test routine, and fixed a mistake in how I named a few functions in ports.c.
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I'm not completely done with the electrical test because it only counts errors right now. So I need to implement a framework to determine which pins are shorted rather than just counting them.
2011-12-04 16:13:30 -08:00
Doug Brown
06a667d66d
Fixed an inaccurate comment.
2011-11-27 23:06:02 -08:00
Doug Brown
0a52df645a
- Fixed stupid bug of -1 instead of +1 in external_mem.c.
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- 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.
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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
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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
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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
