Revision 0:edcb13b58b4f, committed 2014-07-30

Comitter:

screamer

Date:

Wed Jul 30 10:27:21 2014 +0000

Commit message:

Initial revision

Changed in this revision

diff -r 000000000000 -r edcb13b58b4f LED_Bar.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LED_Bar.cpp	Wed Jul 30 10:27:21 2014 +0000
@@ -0,0 +1,93 @@
+/*
+LED bar library V1.0
+2010 Copyright (c) Seeed Technology Inc. All right reserved.
+
+Original Author: LG
+
+Modify: Mihail Stoyanov (mihail.stoyanov@arm.com) for ARM mbed, 2014-07-30
+User can choose which Io to be used.
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include "LED_Bar.h"
+
+LED_Bar::LED_Bar(PinName pinClk, PinName pinDta) : __pinClk(pinClk), __pinDta(pinDta)
+{
+    __led_state = 0x00;
+}
+
+void LED_Bar::latchData()
+{
+    __pinDta = 0;
+    wait_us(10);
+
+    for(int i=0; i<4; i++) {
+        __pinDta = 1;
+        __pinDta = 0;
+    }
+
+}
+
+void LED_Bar::send16bitData(unsigned int data)
+{
+    for(int i=0; i<16; i++) {
+        unsigned int state = data & 0x8000 ? 1 : 0;
+        __pinDta = state;
+
+        state = __pinClk ? 0 : 1;
+        __pinClk = state;
+
+        data <<= 1;
+    }
+}
+
+void LED_Bar::ledIndexBit(unsigned int index_bits)
+{
+
+    send16bitData(CMDMODE);
+
+    for (int i=0; i<12; i++) {
+        unsigned int state = (index_bits&0x0001) ? ON : SHUT;
+        send16bitData(state);
+
+        index_bits = index_bits>>1;
+    }
+
+    latchData();
+}
+
+void LED_Bar::setLevel(int level)
+{
+
+    if(level>10)return;
+
+    send16bitData(CMDMODE);
+
+    for(int i=0; i<12; i++) {
+        unsigned int state1 = (i<level) ? ON : SHUT;
+
+        send16bitData(state1);
+    }
+
+    latchData();
+}
+
+void LED_Bar::setSingleLed(int num, int st)
+{
+    if(num>10)return;
+    __led_state = st ? (__led_state | (0x01<<num)) : (__led_state & ~(0x01<<num));
+    ledIndexBit(__led_state);
+
+}

diff -r 000000000000 -r edcb13b58b4f LED_Bar.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LED_Bar.h	Wed Jul 30 10:27:21 2014 +0000
@@ -0,0 +1,82 @@
+/*
+LED bar library V1.0
+2010 Copyright (c) Seeed Technology Inc. All right reserved.
+
+Original Author: LG
+Modify: Loovee, 2014-2-26
+User can choose which Io to be used.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include "mbed.h"
+
+#ifndef LED_Bar_H
+#define LED_Bar_H
+
+#define CMDMODE 0x0000 // Work on 8-bit mode
+#define ON 0x00ff // 8-bit 1 data
+#define SHUT 0x0000 // 8-bit 0 data
+
+/**
+ * The LED_Bar interface
+ */
+class LED_Bar
+{
+
+public:
+    LED_Bar(PinName pinClk, PinName pinDta);
+
+    /**
+     * Set led single bit, a bit contrl a led
+     * @param index_bits which bit. if 0x05, then led 0 and led 3 will on, the others will off
+     */
+    void ledIndexBit(unsigned int index_bits);
+
+    /**
+     * Set level, frm 0 to 10.
+     * @param level Level 0 means all leds off while level 5 means 5led on and the other will off
+     */
+    void setLevel(int level);
+    
+    /**
+     * Control a single led
+     * @param num which led
+     * @param st  1: on 0: off
+     */
+    void setSingleLed(int num, int st);
+
+private:
+    /**
+     * Pin for clock
+     */
+    DigitalOut __pinClk;
+    
+    /**
+     * Pin for data
+     */
+    DigitalOut __pinDta;
+
+    /**
+     * LED State
+     */
+    unsigned int __led_state;
+
+    void send16bitData(unsigned int data);
+    void latchData(void);
+
+};
+
+#endif
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