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Harald Pichler 2017-07-20 15:16:01 +02:00
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206
examples/osd/lgb-train/Grove_LED_Bar.cpp Normal file
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/*
LED bar library V2.0
Copyright (c) 2010 Seeed Technology Inc.
Original Author: LG
Modify: Loovee, 2014-2-26
User can choose which Io to be used.
The MIT License (MIT)
Copyright (c) 2013 Seeed Technology Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include "Grove_LED_Bar.h"
Grove_LED_Bar::Grove_LED_Bar(unsigned char pinClock, unsigned char pinData, bool greenToRed)
{
__pinClock = pinClock;
__pinData = pinData;
__greenToRed = greenToRed; // ascending or decending
for (byte i = 0; i < 10; i++)
__state[i] = 0x00; // persist state so individual leds can be toggled
pinMode(__pinClock, OUTPUT);
pinMode(__pinData, OUTPUT);
}
// Send the latch command
void Grove_LED_Bar::latchData()
{
digitalWrite(__pinData, LOW);
delayMicroseconds(10);
for (unsigned char i = 0; i < 4; i++)
{
digitalWrite(__pinData, HIGH);
digitalWrite(__pinData, LOW);
}
}
// Send 16 bits of data
void Grove_LED_Bar::sendData(unsigned int data)
{
unsigned int state = 0;
for (unsigned char i = 0; i < 16; i++)
{
unsigned int state1 = (data & 0x8000) ? HIGH : LOW;
digitalWrite(__pinData, state1);
//state = digitalRead(__pinClock) ? LOW : HIGH;
state = 1-state;
digitalWrite(__pinClock, state);
data <<= 1;
}
}
// Change the orientation
// Green to red, or red to green
void Grove_LED_Bar::setGreenToRed(bool greenToRed)
{
__greenToRed = greenToRed;
setData(__state);
}
// Set level (0-10)
// Level 0 means all leds off
// Level 10 means all leds on
// Level 4.5 means 4 LEDs on and the 5th LED's half on
void Grove_LED_Bar::setLevel(float level)
{
level = max(0, min(10, level));
level *= 8; // there are 8 (noticable) levels of brightness on each segment
// Place number of 'level' of 1-bits on __state
for (byte i = 0; i < 10; i++) {
__state[i] = (level > 8) ? ~0 :
(level > 0) ? ~(~0 << byte(level)) : 0;
level -= 8;
};
setData(__state);
}
// Set a single led
// led (1-10)
// brightness (0-1)
void Grove_LED_Bar::setLed(unsigned char led, float brightness)
{
led = max(1, min(10, led));
brightness = max(0, min(brightness, 1));
// Zero based index 0-9 for bitwise operations
led--;
// 8 (noticable) levels of brightness
// 00000000 darkest
// 00000011 brighter
// ........
// 11111111 brightest
__state[led] = ~(~0 << (unsigned char) (brightness*8));
setData(__state);
}
// Toggle a single led
// led (1-10)
void Grove_LED_Bar::toggleLed(unsigned char led)
{
led = max(1, min(10, led));
// Zero based index 0-9 for bitwise operations
led--;
__state[led] = __state[led] ? 0 : ~0;
setData(__state);
}
// each element in the state will hold the brightness level
// 00000000 darkest
// 00000011 brighter
// ........
// 11111111 brightest
void Grove_LED_Bar::setData(unsigned char __state[])
{
sendData(GLB_CMDMODE);
for (unsigned char i = 0; i < 10; i++)
{
if (__greenToRed)
{
// Go backward on __state
sendData(__state[10-i-1]);
}
else
{
// Go forward on __state
sendData(__state[i]);
}
}
// Two extra empty bits for padding the command to the correct length
sendData(0x00);
sendData(0x00);
latchData();
}
void Grove_LED_Bar::setBits(unsigned int bits)
{
for (unsigned char i = 0; i < 10; i++)
{
if ((bits % 2) == 1)
__state[i] = 0xFF;
else
__state[i] = 0x00;
bits /= 2;
}
setData(__state);
}
// Return the current bits
unsigned int const Grove_LED_Bar::getBits()
{
unsigned int __bits = 0x00;
for (unsigned char i = 0; i < 10; i++)
{
if (__state[i] != 0x0)
__bits |= (0x1 << i);
}
return __bits;
}

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examples/osd/lgb-train/Grove_LED_Bar.h Normal file
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/*
LED bar library V2.0
Copyright (c) 2010 Seeed Technology Inc.
Original Author: LG
Modify: Loovee, 2014-2-26
User can choose which Io to be used.
Modify: Long, 2015-01-07
User can change the brightness level for each LED segment
Rename constant to avoid name conflict
The MIT License (MIT)
Copyright (c) 2013 Seeed Technology Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef Grove_LED_Bar_H
#define Grove_LED_Bar_H
#include <Arduino.h>
// Avoid name conflict
#define GLB_CMDMODE 0x00 // Work on 8-bit mode
#define GLB_ON 0xff // 8-bit 1 data
#define GLB_OFF 0x00 // 8-bit 0 data
class Grove_LED_Bar
{
private:
unsigned int __pinClock; // Clock pin
unsigned int __pinData; // Data pin
bool __greenToRed; // Orientation (0 = red to green, 1 = green to red)
unsigned char __state[10];// Led state, brightness for each LED
void sendData(unsigned int data); // Send a word to led bar
void latchData(void); // Load data into the latch register
void setData(unsigned char bits[]);//Set data array
public:
Grove_LED_Bar(unsigned char pinClock, unsigned char pinData, bool greenToRed); // Initialize
void begin(){pinMode(__pinClock, OUTPUT); pinMode(__pinData, OUTPUT);}
void setGreenToRed(bool greenToRed); // (Re)set orientation
void setLevel(float level); // Set level, range from 0 to 10
void setLed(unsigned char led, float brightness);// Set brightness for a single led, range from 0 to 1
void toggleLed(unsigned char led); // Toggle a single led
void setBits(unsigned int bits); // Toggle leds to match given bits
unsigned int const getBits(); // Get the current state
};
#endif