Hello Matthias,
Thank you. >rx-buf is wonderful. I have high hopes of making the
keypad appear as a subset of the keyboard so they can use exactly the
same code.
The PCF8574A + keypad + interrupt also seems to work well. I
explicitly protected each of the other i2c devices on the bus from
being interrupted (by the keypress interrupt) at inopportune moments
using critical[ <code> ]critical. Without this I would (eventually)
crash the system with a -4000 error. I thought about protecting all
the i2c devices en masse at a lower level e.g.
: i2c.c!
critical[
i2c.begin
<code>
i2c.end
]critical
;
or is this just a bad idea?
Tristan
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