FreeCalypso > hg > fc-magnetite
view src/cs/riviera/rvt/rvt_env.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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/******************************************************************************* * * rvt_env.c * * This module interfaces the environment and contains all start/init/stop... * functions of the trace module. * * (C) Texas Instruments, all rights reserved * * Version number : 0.1 * * History : 0.1 (7/4/2000) - Created * * Date : 7/4/2000 * * Author : Cristian Livadiotti, c-livadiotti@ti.com * ******************************************************************************/ #ifndef __RVT_ENV_H__ #define __RVT_ENV_H__ #include "rvm/rvm_gen.h" typedef enum { RVT_NOT_STARTED, RVT_STARTED } T_RVT_STATE; extern T_RVF_MB_ID rvt_mb_id; extern T_RVT_STATE rvt_module_state; T_RVM_RETURN rvt_get_info (T_RVM_INFO_SWE *p_info_swe); T_RVM_RETURN rvt_set_info (T_RVF_ADDR_ID addr_id, T_RV_RETURN_PATH return_path[], T_RVF_MB_ID bk_id[], T_RVM_CB_FUNC rvm_error_ft); T_RVM_RETURN rvt_init (void); T_RVM_RETURN rvt_task_core (void); T_RVM_RETURN rvt_stop (void); T_RVM_RETURN rvt_kill (void); #endif /* __RVT_ENV_H__ */