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fc-buzplay: PWT refactoring, first step
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Apr 2022 08:00:50 +0000
parents e7502631a0f9
children
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# This phone has 3 memory chip selects:
#
# nCS0: flash chip select 1
# nCS1: RAM chip select
# nCS3: flash chip select 2
#
# All 3 chip select lines go to the same physical IC, a RAM/flash MCP.
# We set WS=4 for all 3 here, copying what OsmocomBB does.  The access
# time listed in the datasheet is 70 ns for both RAM and flash, and per
# my math setting WS=3 *might* work, but it could be marginal, so let's
# play it safe for now.

w16 fffffb00 00A4
w16 fffffb02 00A4
w16 fffffb06 00A4

# We also need to switch the CS4/ADD22 pin from its default function
# of CS4 to the needed ADD22.

w16 fffef006 0008

# With this phone all Calypso serial access always goes through the
# CP2102 usb2serial IC inside the phone itself, which is programmed
# to support the high non-standard baud rates.  So we can safely
# switch to 812500 baud unconditionally.

baud 812500