FreeCalypso > hg > fc-magnetite
view src/cs/layer1/gtt_include/l1gtt_signa.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 * L1GTT_SIGNA.H * * Filename l1gtt_signa.h * Copyright 2003 (C) Texas Instruments * ************* Revision Controle System Header *************/ #if (L1_GTT == 1) #define P_GTT ( 0x19 ) // Messages Upper layer <-> L1A #define MMI_GTT_START_REQ ( ( P_GTT << 8 ) | 1 ) #define MMI_GTT_START_CON ( ( P_GTT << 8 ) | 2 ) #define MMI_GTT_STOP_REQ ( ( P_GTT << 8 ) | 3 ) #define MMI_GTT_STOP_CON ( ( P_GTT << 8 ) | 4 ) // Messages L1S <-> L1A #define L1_GTT_START_CON ( ( P_GTT << 8 ) | 5 ) #define L1_GTT_STOP_CON ( ( P_GTT << 8 ) | 6 ) // Test messages #define TST_CLOSE_GTT_LOOP_REQ ( ( P_GTT << 8 ) | 7 ) #define TST_CLOSE_GTT_LOOP_CON ( ( P_GTT << 8 ) | 8 ) #define TST_OPEN_GTT_LOOP_REQ ( ( P_GTT << 8 ) | 9 ) #define TST_OPEN_GTT_LOOP_CON ( ( P_GTT << 8 ) | 10 ) #define TST_START_GTT_TEST_REQ ( ( P_GTT << 8 ) | 11 ) #define TST_START_GTT_TEST_CON ( ( P_GTT << 8 ) | 12 ) #define TST_STOP_GTT_TEST_REQ ( ( P_GTT << 8 ) | 13 ) #define TST_STOP_GTT_TEST_CON ( ( P_GTT << 8 ) | 14 ) #endif // L1_GTT == 1