FreeCalypso > hg > fc-tourmaline

annotate src/cs/system/bootloader/inc/serial.h @ 72:7bf39f5e834d

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backlight control on Luna: switch PWL instead of LEDB This change is preliminary toward upcoming rework of backlight control logic in our UI firmware. LEDB does not exist on Tango-based platforms (it is not brought out on Tango modules), thus turning it on and off produces absolutely no effect beyond making L1 disable deep sleep when LEDB is turned on. However, both iWOW DSK and our upcoming FC Caramel2 boards have a PWL LED, so let's switch that LED on and off to indicate the state of the UI firmware's backlight control. Note that we are NOT switching the actual Luna LCD backlight here, even though it is trivially controlled with a GPIO. The reason for this seemingly strange choice is that we don't want to turn this development board LCD backlight off until we bring the higher-level backlight control logic up to par, including new logic to "swallow" the first keypress that turns on the darkened LCD.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 24 Oct 2020 07:39:54 +0000
parents 4e78acac3d88
children
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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1 /*******************************************************************************
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2 *
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3 * SERIAL.H
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4 *
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5 * This module contains functions to send or receive commands on the USART 8251.
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6 * Only polled mode is used.
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7 *
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8 * (C) Texas Instruments 1998
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9 *
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10 ******************************************************************************/
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11
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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12 #ifndef __SERIAL_H__
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13 #define __SERIAL_H__
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14
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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15 #include "main/sys_types.h"
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16
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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17 /*
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18 * ser_receive_command and ser_receive_char have 2 modes:
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19 * SER_INFINITE : Waits until a command is received.
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20 * SER_IMMEDIATE: Returns imediately even if no character is received.
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21 */
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22
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23 enum {
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24 SER_INFINITE,
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25 SER_IMMEDIATE
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26 };
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27
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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28 /*
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29 * Return values of ser_receive_data_for_flash.
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30 */
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31
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32 enum {
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33 SER_DATA_READY,
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34 SER_DATA_ERROR,
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35 SER_END_OF_FILE
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36 };
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37
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38 extern void ser_wait_no_activity (SYS_UWORD8 device_id);
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39 extern long ser_send_command (SYS_UWORD8 *command, SYS_UWORD8 device_id);
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40 extern SYS_UWORD8 ser_receive_command (SYS_UWORD8 *command, int mode);
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41 extern long ser_receive_data_for_flash (SYS_UWORD32 *address, SYS_UWORD16 *data, SYS_UWORD8 device_id);
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42 extern void ser_initialize_flash_data_detection (void);
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43 extern void ser_initialize_serial_link (void);
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44 extern void ser_wait_last_character_sent (SYS_UWORD8 device_id);
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45
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46 #endif /* __SERIAL_H__ */