annotate targets/c11x.h @ 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 4a8dacbe9187
children 35e7f9d0379f
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36c3c910f709 targets/c11x.{conf,h} added, based on c139
Mychaela Falconia <falcon@freecalypso.org>
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1 #define CONFIG_TARGET_C11X 1
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ea22e20c3d70 targets/c1??.h: define CONFIG_TARGET_C1XX in addition to
Mychaela Falconia <falcon@freecalypso.org>
parents: 380
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2 #define CONFIG_TARGET_C1XX 1
89
6c3881378a31 targets: c139 and pirelli added
Mychaela Falconia <falcon@freecalypso.org>
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3 #define CONFIG_TARGET_COMPAL 1
380
36c3c910f709 targets/c11x.{conf,h} added, based on c139
Mychaela Falconia <falcon@freecalypso.org>
parents: 89
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4 #define USE_TSPACT2_FOR_TXLOW 0
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4a8dacbe9187 targets/*.h: #define GPIO1_SPEAKER_CTRL to 0 or 1 as appropriate
Mychaela Falconia <falcon@freecalypso.org>
parents: 590
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5 #define GPIO1_SPEAKER_CTRL 0
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6c3881378a31 targets: c139 and pirelli added
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 #define UARTFAX_CLASSIC_DTR_DCD 0