FreeCalypso > hg > fc-magnetite
view doc/Freerunner-Howto @ 629:3231dd9b38c1
armio.c: make GPIOs 8 & 13 outputs driving 1 on all "classic" targets
Calypso GPIOs 8 & 13 are pinmuxed with MCUEN1 & MCUEN2, respectively,
and on powerup these pins are MCUEN, i.e., outputs driving 1. TI's code
for C-Sample and earlier turns them into GPIOs configured as outputs also
driving 1 - so far, so good - but TI's code for BOARD 41 (which covers
D-Sample, Leonardo and all real world Calypso devices derived from the
latter) switches them from MCUEN to GPIOs, but then leaves them as inputs.
Given that the hardware powerup state of these two pins is outputs driving 1,
every Calypso board design MUST be compatible with such driving; typically
these GPIO signals will be either unused and unconnected or connected as
outputs driving some peripheral. Turning these pins into GPIO inputs will
result in floating inputs on every reasonably-wired board, thus I am
convinced that this configuration is nothing but a bug on the part of
whoever wrote this code at TI.
This floating input bug had already been fixed earlier for GTA modem and
FCDEV3B targets; the present change makes the fix unconditional for all
"classic" targets. The newly affected targets are D-Sample, Leonardo,
Tango and GTM900.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 02 Jan 2020 05:38:26 +0000 |
| parents | c9a65db8be4a |
| children |
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The latest official firmware for Openmoko Neo1973 and Neo FreeRunner Calypso modems is moko13 as of this writing; moko13 is FreeCalypso Magnetite Hg changeset 286:840113655bbf built for the gtamodem target in the l1reconst configuration. There have been many changes in FC Magnetite since then, but few of them affect the l1reconst config on the gtamodem target in any noticeable way. The few noticeable post-moko13 changes which we do have in our current l1reconst code are not deemed important enough to justify making another formal release for a no-longer-made hardware platform that no longer has any real user community either. However, we also have the new TCS2/TCS3 hybrid config in which the old version of the G23M protocol stack from Openmoko (binary libs only, no source) has been replaced with a newer version from TI's TCS3/LoCosto program, and this new version is full source. This hybrid firmware has now reached the state where it is ready to be exercised by adventurous beta users in real-life usage. The new hybrid fw for the gtamodem target can be built as follows: ./configure.sh gtamodem hybrid cd build-gtamodem-hybrid; make Then after enduring the very slow build, you can flash it with fc-loadtool: loadtool> flash erase 0 0x250000 loadtool> flash program-bin 0 fwimage.bin If you are brave enough to do the above, please let us know how this new modem firmware fares when driven by QtMoko or SHR on the AP - it would definitely be an adventure! We would be most interested in working with developers or maintainers of specific AP software components that are directly responsible for talking AT commands to the modem, if there are any such developers or maintainers still around.