Add seven segmend LED display driver (config files).

This driver allows to display text on a seven segment LED display.

Signed-off-by: Fabio Bizzi <fabio.bizzi@gmail.com>
git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4778 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cfg/cfg_led_7seg.h b/bertos/cfg/cfg_led_7seg.h
new file mode 100644 (file)
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+++ b/bertos/cfg/cfg_led_7seg.h
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+/**
+ * \file cfg_led_7seg.h
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ * -->
+ *
+ * \brief Configuration file for led 7 segment display.
+ *
+ * \author Fabio Bizzi <fbizzi@bizzi.org>
+ *
+ * \addtogroup SevenSegDisplay 7 Segments LED Displays Driver
+ * \{
+ *
+ */
+
+#ifndef CFG_LED_7SEG_H
+#define CFG_LED_7SEG_H
+
+/**
+ * Use a Common Cathode display.
+ * $WIZ$ type = "boolean"
+ */
+#define CONFIG_LED_7SEG_CCAT       0
+
+/**
+ * Number of digit present in the LED display.
+ * $WIZ$ type = "int"
+ * $WIZ$ min = 1
+ * $WIZ$ max = 8
+ */
+#define CONFIG_LED_7SEG_DIGIT      4
+
+/**
+ * Max lenght of the string to be displayed.
+ * $WIZ$ type = "int"
+ * $WIZ$ min = 16
+ * $WIZ$ max = 255
+ */
+#define CONFIG_LED_7SEG_STRLEN     255
+
+/**
+ * Default scrolling speed (ms * CONFIG_LED_7SEG_RTIME).
+ * $WIZ$ type = "int"
+ */
+#define CONFIG_LED_7SEG_SSPEED      10
+
+/**
+ * Default refresh time (ms).
+ * $WIZ$ type = "int"
+ */
+#define CONFIG_LED_7SEG_RTIME      5
+
+#endif /* CFG_LED_7SEG_H */
+ /** \} */ //defgroup drivers
\ No newline at end of file

diff --git a/bertos/hw/hw_led_7seg.h b/bertos/hw/hw_led_7seg.h
new file mode 100644 (file)
index 0000000..4149323
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+++ b/bertos/hw/hw_led_7seg.h
@@ -0,0 +1,231 @@
+/**
+ * \file hw_led_7seg.h
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ * -->
+ *
+ * \brief led 7 segment display low-level
+ *
+ * This file has the functions that must be
+ * implemented to drive the 7 segments display by your
+ * hardware
+ *
+ * \author Fabio Bizzi <fbizzi@bizzi.org>
+ *
+ * Example implementation for AtMEGA 1280
+ * (Arduino MEGA) with a 4 digit display.
+ * We use PORTA to connect the 8 pins of
+ * the 7 segments display and 4 bit of
+ * PORTC to select which digit of the
+ * display we have to write on.
+ *
+ * \code
+ *  7 Seg LED Pin
+ *  ----------------
+ *  LED SEGMENT
+ *  ----------------
+ *  DP G F E D C B A
+ *  7  6 5 4 3 2 1 0
+ *  ----------------
+ *  PORT A Pin
+ *  ----------------
+ *
+ *  7 Seg Display Selection
+ *  ----------------
+ *  Display Nr.
+ *  ----------------
+ *  N N N N 3 2 1 0
+ *  7 6 5 4 3 2 1 0
+ *  ----------------
+ *  PORT C Pin
+ *  ----------------
+ * \endcode
+ *
+ * The implementation of the sseg_on procedure that set the PROPER PIN of PORT C
+ * to enable the requested digit of the display, after write the encoded character
+ * to PORT A
+ *
+ * \code
+ *
+ * INLINE void sseg_on(uint8_t dgt, uint8_t n_dgt)
+ * {
+ *  switch (n_dgt)
+ *  {
+ * //Common Cathode
+ * #ifdef CONFIG_LED_7SEG_CCAT
+ *
+ *             case 0:
+ *                     PORTC &= ~(BV(PORTC1) | BV(PORTC2) | BV(PORTC3));
+ *                     PORTC |= BV(PORTC0);
+ *                     break;
+ *             case 1:
+ *                     PORTC &= ~(BV(PORTC0) | BV(PORTC2) | BV(PORTC3));
+ *                     PORTC |= BV(PORTC1);
+ *                     break;
+ *             case 2:
+ *                     PORTC &= ~(BV(PORTC0) | BV(PORTC1) | BV(PORTC3));
+ *                     PORTC |= BV(PORTC2);
+ *                     break;
+ *             case 3:
+ *                     PORTC &= ~(BV(PORTC0) | BV(PORTC1) | BV(PORTC2));
+ *                     PORTC |= BV(PORTC3);
+ *                     break;
+ *
+ * //Common Anode
+ * #else
+ *
+ *             case 0:
+ *                     PORTC |= (BV(PORTC1) | BV(PORTC2) | BV(PORTC3));
+ *                     PORTC &= ~(BV(PORTC0));
+ *                     break;
+ *             case 1:
+ *                     PORTC |= (BV(PORTC0) | BV(PORTC2) | BV(PORTC3));
+ *                     PORTC &= ~(BV(PORTC1));
+ *                     break;
+ *             case 2:
+ *                     PORTC |= (BV(PORTC0) | BV(PORTC1) | BV(PORTC3));
+ *                     PORTC &= ~(BV(PORTC2));
+ *                     break;
+ *             case 3:
+ *                     PORTC |= (BV(PORTC0) | BV(PORTC1) | BV(PORTC2));
+ *                     PORTC &= ~(BV(PORTC3));
+ *                     break;
+ *
+ * #endif
+ *
+ *     }
+ *     //Write the charater
+ *     PORTA = dgt;
+ * }
+ *
+ * \endcode
+ *
+ * The implementation of the sseg_init procedure that set the DIRECTION of PORT C
+ * and PORT A to output
+ *
+ * \code
+ *
+ * INLINE void sseg_init(void)
+ * {
+ * //Initialize PIN Direction to OUTPUT
+ *     DDRA = 0xFF;
+ *     DDRC |= (BV(DDC0) | BV(DDC1) | BV(DDC2) | BV(DDC3));
+ *     //Set the display OFF
+ *     SSEG_OFF();
+ * }
+ *
+ * \endcode
+ *
+ * The implementation of the sseg_off procedure that set the reset PORT A
+ * to clean the display and turn off all the pin of PORT C that drive the
+ * display's digits
+ *
+ * \code
+ *
+ * INLINE void sseg_off(void)
+ * {
+ * //Set the display OFF
+ * //Common Cathode
+ * #ifdef CONFIG_LED_7SEG_CCAT
+ *    PORTA = 0x00;
+ *    PORTC &= ~(BV(PORTC0) | BV(PORTC1) | BV(PORTC2) | BV(PORTC3));
+ * //Common Anode
+ * #else
+ *    PORTA = 0xFF;
+ *    PORTC |= (BV(PORTC0) | BV(PORTC1) | BV(PORTC2) | BV(PORTC3));
+ * #endif
+ *
+ * }
+ *
+ * \endcode
+ *
+ */
+
+#ifndef HW_LED_7SEG_H
+#define HW_LED_7SEG_H
+
+#include "cfg/cfg_led_7seg.h"
+
+/*
+ * INLINE HW Functions
+ */
+
+/**
+ * \brief Clean the display
+ *
+ * This is the procedure that clean the display in HW mode.
+ * you have to write it according with your hardware and micro.
+ */
+INLINE void sseg_off(void)
+{
+/* Set the display OFF */
+#ifdef CONFIG_LED_7SEG_CCAT
+/* You have to implment it */
+/* Common Cathode */
+#else
+/* You have to implment it */
+/* Common Anode */
+#endif
+}
+
+/**
+ * \brief writes the character to the single digit of the display
+ *
+ * This is the procedure that writes the character to the single digit
+ * of the display, you have to write it according with your hardware and micro.
+ *
+ *     \param dgt the character that has to be displayed
+ *     \param n_dgt the digit where to disply the character of the display's digits.
+ */
+INLINE void sseg_on(uint8_t dgt, uint8_t n_dgt)
+{
+#ifdef CONFIG_LED_7SEG_CCAT
+/* Common Cathode */
+/* You have to implment it */
+#else
+/* Common Anode */
+/* You have to implment it */
+#endif
+}
+
+/**
+ * \brief initalize the HW regsiters
+ *
+ * This is the procedure that initalize the HW regsiters.
+ * you have to write it according with your hardware and micro.
+ */
+INLINE void sseg_init(void)
+{
+       /* Initialize PIN Direction to OUTPUT*/
+       /* You have to implment it */
+       /* Set the display OFF */
+       sseg_off();
+}
+
+#endif /* HW_LED_7SEG_H */
+