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230
bertos/drv/led_7seg.h
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230
bertos/drv/led_7seg.h
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/**
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* \file led_7seg.h
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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* -->
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*
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* \author Fabio Bizzi <fbizzi@bizzi.org>
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*
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* \defgroup SevenSegDisplay 7 Segments LED Displays Driver
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* \ingroup drivers
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* \{
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*
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* \brief 7 segments LED displays (headers)
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*
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* Here you find the prototypes and the data structures that
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* format and holds the text that has to be displayed by the
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* 7 segments display.
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*
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* The main function is the sevenseg_print()
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* that is called by your software to display the text, also
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* important is the sevenseg_init() that initialize the data
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* structures and set the refresh timer, you need to call
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* this procedure just one time in the init procedure of
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* your software before any use of the sevenseg_print().
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*
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* Usage:
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*
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* To use succesfully the display you have to follow these steps:
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*
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* \li Create the structure and init the display
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* \li Check if the display is ready to accept a new print with
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* the function sevenseg_isReady()
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* \li Unlock the display with the function sevenseg_unlock()
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* NOTE: when the display is unlocked the displaying of any
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* text is stopped but the data (text and attributes like text
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* position, blinking etc etc) are not erased.
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* \li Set the wanted text attributes with sevenseg_set* functions
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* \li Print the wanted text with sevenseg_print()
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* \li Lock the display with sevenseg_lock()
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*
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* When the display is locked the displaying of the text starts.
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*
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*
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* \code
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* static Seven_Seg display;
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* // ...
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* sevenseg_init(&display);
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* while (!sevenseg_isReady(&display))
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* ;
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* sevenseg_unlock(&display);
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* sevenseg_setBlink(&display,false,0);
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* sevenseg_setRunonce(&display,false);
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* sevenseg_setRunspeed(&display,10);
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* if ((sevenseg_print(&display, "made with bertos.")) != 0)
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* return -1;
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* sevenseg_lock(&display);
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* \endcode
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*
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* $WIZ$ module_name = "led_7seg"
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* $WIZ$ module_depends = "timer"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_led_7seg.h"
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* $WIZ$ module_hw = "bertos/hw/hw_led_7seg.h"
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*/
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#ifndef DRV_LED_7SEG_H
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#define DRV_LED_7SEG_H
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#include "cfg/cfg_led_7seg.h"
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#include <drv/timer.h>
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#include <mware/event.h>
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/**
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* \name Numbers and Letters Table.
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* \note These tables contain all the printable
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* characters on a 7 segment digit encoded
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* for common cathode and common anode
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* display type.
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*
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* 0, 1, 2, 3, 4, 5, 6, 7, 8,
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* 9, ., -, A, B, C, D, E, F,
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* G, H, I, J, K, L, M, N, O,
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* P, Q, R, S, T, U, V, W, X,
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* Y, Z, SPACE
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*
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* \{
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*/
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#if CONFIG_LED_7SEG_CCAT
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static const uint8_t segstable[] =
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{
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0x3f, 0x6, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x7, 0x7f,
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0x6f, 0x80, 0x40, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71,
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0x3d, 0x74, 0x30, 0x1e, 0x75, 0x38, 0x15, 0x37, 0x3f,
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0x73, 0x67, 0x50, 0x6d, 0x78, 0x3e, 0x2a, 0x6a, 0x76,
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0x6e, 0x5b, 0x0
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};
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#else
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static const uint8_t segstable[] =
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{
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0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80,
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0x90, 0x7f, 0xbf, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e,
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0xc2, 0x8b, 0xcf, 0xe1, 0x8a, 0xc7, 0xea, 0xc8, 0xc0,
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0x8c, 0x98, 0xaf, 0x92, 0x87, 0xc1, 0xd5, 0x95, 0x89,
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0x91, 0xa4, 0xff
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};
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#endif
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/**\} */
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/**
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* Context data for Display functions
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*
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*/
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typedef struct SevenSeg
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{
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/** The String to be displayed */
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uint8_t string[CONFIG_LED_7SEG_STRLEN];
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/** The length of the string to be displayed */
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unsigned int string_len;
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/** Has to blink? */
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bool blink;
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/** Has to blink only one digit? */
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uint8_t bdigit;
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/** Has to be displayed only one time? */
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bool runonce;
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/** Scrolling speed */
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unsigned int speed;
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/** Working scrolling speed */
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unsigned int curspeed;
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/** Is it printed at least one time? */
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bool firstrun;
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/** Working current position */
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unsigned int curpos;
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/** Working current digit */
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unsigned int curdigit;
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/** Is the structure in edit? */
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bool busyedit;
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} SevenSeg;
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/* Functions prototypes */
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/*
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* This is the procedure that fills the seven_seg structure with the translated
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* string to display. It swaps also the structures to display the new text when
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* all the data is ready to display.
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*/
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int sevenseg_print(SevenSeg *SS, const char *sstring);
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/*
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* This is the procedure that inits all the structures that rules the 7 segments
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* display and set the timer for the proper print/refresh of the text.
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*/
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void sevenseg_init(SevenSeg *SS);
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/*
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* This is the procedure that does a short print of all segments of all
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* digits of the display.
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*/
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void sevenseg_test(SevenSeg *SS);
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/*
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* This is the procedure that check if the print of the current text is run
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* almost one time and we're ready to print a new text.
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*/
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bool sevenseg_isReady(SevenSeg *SS);
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/*
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* This is the procedure that check if the print of the current text is run
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* almost one time and then set the status of the display to "unlocked".
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*/
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bool sevenseg_unlock(SevenSeg *SS);
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/*
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* This is the procedure that lock the display and permit
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* the print of the text.
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*/
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bool sevenseg_lock(SevenSeg *SS);
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/*
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* This is the procedure that set the blinking of the display.
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* You can choose to blink all the display or only a single
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* digit.
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*/
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bool sevenseg_setBlink(SevenSeg *SS, bool blink, uint8_t digit);
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/*
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* This is the procedure that set if the text has to be displayed
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* just one time
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*/
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bool sevenseg_setRunonce(SevenSeg *SS, bool runonce);
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/*
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* This is the procedure that set the scrolling speed of the text
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* if the text is longer than the display digits or the
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* duration of the display if the text is smaller or equal the
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* length of display digits.
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*/
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bool sevenseg_setRunspeed(SevenSeg *SS, unsigned int r_speed);
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/*
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* This is the procedure that blanks the text to be displayed
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* and so on clear the display.
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*/
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bool sevenseg_clear(SevenSeg *SS);
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#endif /* DRV_LED_7SEG_H */
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/** \} */ //defgroup drivers
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