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Discussion Groups | BasicX | Com3 Memory map

Discussion forum for the BasicX family of microcontroller chips.

Com3 Memory map - Dan Bielecki - Jul 18 18:01:00 2002

I am working on interfacing a device to a BX24 that uses a 9-bit data
stream.
The device is attached to com3...any pin.
Logic is using Queues/DefineCom3/OpenCom.....not ShitIn/ShifOut.
The bit stream is as follows:

S0 D0 D1 D2 D3 D4 D5 D6 D7 D8 S1

S0 = Start bit (always 0)
S1 = Stop bit (always 1)
Dn = Data bits

I want Com3 to emulate Com1's UART UCR-CHR9 (Atmel manual, pg 56).
The bit-word I need is in D0-D7. I want to ignore D8 but want the Queue
functions to read the stream correctly.

Does anyone have the memory maps for Com3....I want to peek and poke the D8
bit as needed...and reconfigure Com3 for the 9-bit word. If I have I have
maps I can figure the thing out......

.db. [Non-text portions of this message have been removed]




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