FreeCalypso > hg > fc-magnetite
view src/cs/layer1/p_include/l1p_vare.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 | 945cf7f506b2 |
children |
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/************* Revision Controle System Header ************* * GSM Layer 1 software * L1P_VAREX.H * * Filename l1p_vare.h * Copyright 2003 (C) Texas Instruments * ************* Revision Controle System Header *************/ #ifdef L1P_ASYN_C #if (LONG_JUMP == 3) #pragma DATA_SECTION(l1ps,".l1s_global") #pragma DATA_SECTION(l1pa_l1ps_com,".l1s_global") #pragma DATA_SECTION(l1ps_macs_com,".l1s_global") #pragma DATA_SECTION(l1ps_dsp_com,".l1s_global") #endif // Global Packet L1A structure T_L1PA_GLOBAL l1pa; // Global Packet L1S structure T_L1PS_GLOBAL l1ps; // Common structure between L1A and L1S in packet mode T_L1PA_L1PS_COM l1pa_l1ps_com; // Communication between L1S and MAC-S in packet mode T_L1PS_MACS_COM l1ps_macs_com; // MCU / DSP interface T_L1PS_DSP_COM l1ps_dsp_com; #else extern T_L1PA_GLOBAL l1pa; extern T_L1PS_GLOBAL l1ps; extern T_L1PA_L1PS_COM l1pa_l1ps_com; extern T_L1PS_DSP_COM l1ps_dsp_com; extern T_L1PS_MACS_COM l1ps_macs_com; #endif