FreeCalypso > hg > fc-magnetite
annotate src/cs/services/tty/tty_api.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> |
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date | Thu, 02 Jan 2020 05:38:26 +0000 |
parents | 945cf7f506b2 |
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rev | line source |
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1 /** |
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2 * @file tty_api.h |
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3 * |
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4 * API Definition for TTY SWE. |
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5 * |
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6 * @author Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com) |
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7 * @version 0.1 |
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8 */ |
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9 |
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10 /* |
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11 * History: |
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12 * |
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13 * Date Modification |
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14 * ------------------------------------ |
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15 * 01/27/2003 Create |
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16 * |
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17 * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved |
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18 */ |
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19 |
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20 #ifndef __TTY_API_H_ |
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21 #define __TTY_API_H_ |
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22 |
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23 #include "rvm/rvm_gen.h" /* Generic RVM types and functions. */ |
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24 |
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25 /* TTY entity (Background Task) is highly linked to the Audio entity. */ |
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26 #include "audio/audio_api.h" |
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27 |
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28 #ifdef __cplusplus |
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29 extern "C" |
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30 { |
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31 #endif |
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32 |
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33 typedef struct |
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34 { |
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35 UINT8 Mode; |
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36 UINT16 ThresholdRead; |
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37 UINT16 ThreshHoldWrite; |
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38 } |
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39 T_AUDIO_TTY_CONFIG_PARAMETER; |
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40 |
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41 #define TTY_STOP (0) |
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42 #define TTY_EXT_START (1) |
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43 |
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44 T_AUDIO_RET audio_tty_set_config (T_AUDIO_TTY_CONFIG_PARAMETER *parameter, |
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45 T_RV_RETURN *return_path); |
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47 #define AUDIO_TTY_STATUS_MSG (0x00F2 | AUDIO_EVENT_EXTERN | AUDIO_EVENTS_MASK) |
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48 |
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49 typedef struct |
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50 { |
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51 T_RV_HDR os_hdr; |
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52 INT8 status; |
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53 } |
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54 T_AUDIO_TTY_STATUS; |
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55 |
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56 #ifdef __cplusplus |
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57 } |
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58 #endif |
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59 |
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61 #endif /*__TTY_API_H_*/ |
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