Seeed / LED_Bar

Library for the LED Bar by Seeed Studio http://www.seeedstudio.com/depot/Grove-LED-Bar-p-1178.html

Dependents:   SensorExamples-mDS-Ethernet SensorNotifyLED SensorNotifyLED Seeed_Grove_Shield_LED_Bar ... more

LED_Bar.cpp@0:edcb13b58b4f, 2014-07-30 (annotated)

Committer:
screamer
Date:
Wed Jul 30 10:27:21 2014 +0000
Revision:
0:edcb13b58b4f
Initial revision

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:edcb13b58b4f 1 /*
screamer 0:edcb13b58b4f 2 LED bar library V1.0
screamer 0:edcb13b58b4f 3 2010 Copyright (c) Seeed Technology Inc. All right reserved.
screamer 0:edcb13b58b4f 4
screamer 0:edcb13b58b4f 5 Original Author: LG
screamer 0:edcb13b58b4f 6
screamer 0:edcb13b58b4f 7 Modify: Mihail Stoyanov (mihail.stoyanov@arm.com) for ARM mbed, 2014-07-30
screamer 0:edcb13b58b4f 8 User can choose which Io to be used.
screamer 0:edcb13b58b4f 9 This library is free software; you can redistribute it and/or
screamer 0:edcb13b58b4f 10 modify it under the terms of the GNU Lesser General Public
screamer 0:edcb13b58b4f 11 License as published by the Free Software Foundation; either
screamer 0:edcb13b58b4f 12 version 2.1 of the License, or (at your option) any later version.
screamer 0:edcb13b58b4f 13
screamer 0:edcb13b58b4f 14 This library is distributed in the hope that it will be useful,
screamer 0:edcb13b58b4f 15 but WITHOUT ANY WARRANTY; without even the implied warranty of
screamer 0:edcb13b58b4f 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
screamer 0:edcb13b58b4f 17 Lesser General Public License for more details.
screamer 0:edcb13b58b4f 18
screamer 0:edcb13b58b4f 19 You should have received a copy of the GNU Lesser General Public
screamer 0:edcb13b58b4f 20 License along with this library; if not, write to the Free Software
screamer 0:edcb13b58b4f 21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
screamer 0:edcb13b58b4f 22 */
screamer 0:edcb13b58b4f 23
screamer 0:edcb13b58b4f 24 #include "LED_Bar.h"
screamer 0:edcb13b58b4f 25
screamer 0:edcb13b58b4f 26 LED_Bar::LED_Bar(PinName pinClk, PinName pinDta) : __pinClk(pinClk), __pinDta(pinDta)
screamer 0:edcb13b58b4f 27 {
screamer 0:edcb13b58b4f 28 __led_state = 0x00;
screamer 0:edcb13b58b4f 29 }
screamer 0:edcb13b58b4f 30
screamer 0:edcb13b58b4f 31 void LED_Bar::latchData()
screamer 0:edcb13b58b4f 32 {
screamer 0:edcb13b58b4f 33 __pinDta = 0;
screamer 0:edcb13b58b4f 34 wait_us(10);
screamer 0:edcb13b58b4f 35
screamer 0:edcb13b58b4f 36 for(int i=0; i<4; i++) {
screamer 0:edcb13b58b4f 37 __pinDta = 1;
screamer 0:edcb13b58b4f 38 __pinDta = 0;
screamer 0:edcb13b58b4f 39 }
screamer 0:edcb13b58b4f 40
screamer 0:edcb13b58b4f 41 }
screamer 0:edcb13b58b4f 42
screamer 0:edcb13b58b4f 43 void LED_Bar::send16bitData(unsigned int data)
screamer 0:edcb13b58b4f 44 {
screamer 0:edcb13b58b4f 45 for(int i=0; i<16; i++) {
screamer 0:edcb13b58b4f 46 unsigned int state = data & 0x8000 ? 1 : 0;
screamer 0:edcb13b58b4f 47 __pinDta = state;
screamer 0:edcb13b58b4f 48
screamer 0:edcb13b58b4f 49 state = __pinClk ? 0 : 1;
screamer 0:edcb13b58b4f 50 __pinClk = state;
screamer 0:edcb13b58b4f 51
screamer 0:edcb13b58b4f 52 data <<= 1;
screamer 0:edcb13b58b4f 53 }
screamer 0:edcb13b58b4f 54 }
screamer 0:edcb13b58b4f 55
screamer 0:edcb13b58b4f 56 void LED_Bar::ledIndexBit(unsigned int index_bits)
screamer 0:edcb13b58b4f 57 {
screamer 0:edcb13b58b4f 58
screamer 0:edcb13b58b4f 59 send16bitData(CMDMODE);
screamer 0:edcb13b58b4f 60
screamer 0:edcb13b58b4f 61 for (int i=0; i<12; i++) {
screamer 0:edcb13b58b4f 62 unsigned int state = (index_bits&0x0001) ? ON : SHUT;
screamer 0:edcb13b58b4f 63 send16bitData(state);
screamer 0:edcb13b58b4f 64
screamer 0:edcb13b58b4f 65 index_bits = index_bits>>1;
screamer 0:edcb13b58b4f 66 }
screamer 0:edcb13b58b4f 67
screamer 0:edcb13b58b4f 68 latchData();
screamer 0:edcb13b58b4f 69 }
screamer 0:edcb13b58b4f 70
screamer 0:edcb13b58b4f 71 void LED_Bar::setLevel(int level)
screamer 0:edcb13b58b4f 72 {
screamer 0:edcb13b58b4f 73
screamer 0:edcb13b58b4f 74 if(level>10)return;
screamer 0:edcb13b58b4f 75
screamer 0:edcb13b58b4f 76 send16bitData(CMDMODE);
screamer 0:edcb13b58b4f 77
screamer 0:edcb13b58b4f 78 for(int i=0; i<12; i++) {
screamer 0:edcb13b58b4f 79 unsigned int state1 = (i<level) ? ON : SHUT;
screamer 0:edcb13b58b4f 80
screamer 0:edcb13b58b4f 81 send16bitData(state1);
screamer 0:edcb13b58b4f 82 }
screamer 0:edcb13b58b4f 83
screamer 0:edcb13b58b4f 84 latchData();
screamer 0:edcb13b58b4f 85 }
screamer 0:edcb13b58b4f 86
screamer 0:edcb13b58b4f 87 void LED_Bar::setSingleLed(int num, int st)
screamer 0:edcb13b58b4f 88 {
screamer 0:edcb13b58b4f 89 if(num>10)return;
screamer 0:edcb13b58b4f 90 __led_state = st ? (__led_state | (0x01<<num)) : (__led_state & ~(0x01<<num));
screamer 0:edcb13b58b4f 91 ledIndexBit(__led_state);
screamer 0:edcb13b58b4f 92
screamer 0:edcb13b58b4f 93 }