LED_Bar.h

00001 /*
00002 LED bar library V1.0
00003 2010 Copyright (c) Seeed Technology Inc. All right reserved.
00004 
00005 Original Author: LG
00006 Modify: Loovee, 2014-2-26
00007 User can choose which Io to be used.
00008 
00009 This library is free software; you can redistribute it and/or
00010 modify it under the terms of the GNU Lesser General Public
00011 License as published by the Free Software Foundation; either
00012 version 2.1 of the License, or (at your option) any later version.
00013 
00014 This library is distributed in the hope that it will be useful,
00015 but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00017 Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public
00020 License along with this library; if not, write to the Free Software
00021 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
00022 */
00023 
00024 #include "mbed.h"
00025 
00026 #ifndef LED_Bar_H
00027 #define LED_Bar_H
00028 
00029 #define CMDMODE 0x0000 // Work on 8-bit mode
00030 #define ON 0x00ff // 8-bit 1 data
00031 #define SHUT 0x0000 // 8-bit 0 data
00032 
00033 /**
00034  * The LED_Bar interface
00035  */
00036 class LED_Bar
00037 {
00038 
00039 public:
00040     LED_Bar(PinName pinClk, PinName pinDta);
00041 
00042     /**
00043      * Set led single bit, a bit contrl a led
00044      * @param index_bits which bit. if 0x05, then led 0 and led 3 will on, the others will off
00045      */
00046     void ledIndexBit(unsigned int index_bits);
00047 
00048     /**
00049      * Set level, frm 0 to 10.
00050      * @param level Level 0 means all leds off while level 5 means 5led on and the other will off
00051      */
00052     void setLevel(int level);
00053     
00054     /**
00055      * Control a single led
00056      * @param num which led
00057      * @param st  1: on 0: off
00058      */
00059     void setSingleLed(int num, int st);
00060 
00061 private:
00062     /**
00063      * Pin for clock
00064      */
00065     DigitalOut __pinClk;
00066     
00067     /**
00068      * Pin for data
00069      */
00070     DigitalOut __pinDta;
00071 
00072     /**
00073      * LED State
00074      */
00075     unsigned int __led_state;
00076 
00077     void send16bitData(unsigned int data);
00078     void latchData(void);
00079 
00080 };
00081 
00082 #endif