kbscan: Switch from GPIO mode to KBS (Normal) mode #362
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Increases XRAM use by 18 bytes. --- build/system76/oryp8/0/ec.mem 2023-07-17 13:57:23.967001078 -0600
+++ build/system76/oryp8/1/ec.mem 2023-07-17 13:57:34.875145986 -0600
@@ -25,5 +25,5 @@
Name Start End Size Max
---------------- -------- -------- -------- --------
PAGED EXT. RAM 0 256
- EXTERNAL RAM 0x0001 0x051e 1310 2048
- ROM/EPROM/FLASH 0x0000 0x8f8e 36218 65536
+ EXTERNAL RAM 0x0001 0x0530 1328 2048
+ ROM/EPROM/FLASH 0x0000 0x8ed4 36032 65536 |
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Use the default mode for reading the keyboard scan matrix when being used as a keyboard. There should be no perceived change in behavior, but should make the code easier to understand. Note: `KSO[17:16]` are configured by `GPCRC` on boards that use them. They are now set to alternate function to use in KBS mode rather than GPIO mode, with the pull-up enabled to prevent them from floating when configured as open-drain. As part of this change, we now only read the hardware matrix state once upfront, instead of on every iteration through the loop applying the logic. Tested by verifying that typing still works on darp9. Signed-off-by: Tim Crawford <tcrawford@system76.com>
Remove checking against the real keys declared in the keymap. It appears to have no effect on behavior. Signed-off-by: Tim Crawford <tcrawford@system76.com>
leviport
approved these changes
Jul 25, 2023
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May be better to use push-pull (ITE default) rather than open-drain? I can't tell what the ENE chip does. I tried and it was buggy. Open-drain is working so I'll just leave it for now. |
jackpot51
approved these changes
Jul 29, 2023
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Use the default mode for reading the keyboard scan matrix when being used as a keyboard. There should be no perceived change in behavior, but should make the code easier to understand.
Note:
KSO[17:16]are configured byGPRCRCon boards that use them. They are now set to alternate function to use in KBS mode rather than GPIO mode, with the pull-up enabled to prevent them from floating when configured as open-drain.As part of this change, we now only read the hardware matrix state once upfront, instead of on every iteration through the loop applying the logic.
Tested by cherry-picking to darp9 and verifying that typing still worked.
Need to test:
TODO:
kbscan_row_has_ghost())kbscan_get_real_keys()is even needed