From 908807639d374a6f95de7c14b3ffba335165870e Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Mon, 10 Dec 2012 18:30:09 +0100 Subject: Port Chariplexing library to plain avr-libc --- .gitignore | 2 + CMakeLists.txt | 36 ++++ Charliplexing.c | 503 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Charliplexing.h | 33 ++++ lolshield.c | 182 ++++++++++++++++++++ 5 files changed, 756 insertions(+) create mode 100644 .gitignore create mode 100644 CMakeLists.txt create mode 100644 Charliplexing.c create mode 100644 Charliplexing.h create mode 100644 lolshield.c diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..dee53c5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +build +*~ diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..c713b85 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,36 @@ +cmake_minimum_required(VERSION 2.8.3) + + +SET(BOARD "atmega328p" CACHE STRING "AVR CPU to build for") +SET(CLOCK "16000000" CACHE STRING "CPU clock") + +SET(FLASH_FLAGS "-patmega328p" "-carduino" "-P/dev/ttyUSB0" "-b57600" CACHE STRING "avrdude flags") + + +find_program(AVR_GCC avr-gcc) +find_program(AVRDUDE avrdude) + +SET(CMAKE_SYSTEM_NAME Generic) + + +SET(CMAKE_C_COMPILER ${AVR_GCC}) + +project(ARDKBD C) + +set(CMAKE_MODULE_PATH ${ARDKDB_SOURCE_DIR}) + + +add_executable(lolshield.elf + lolshield.c + Charliplexing.c +) +set_target_properties(lolshield.elf PROPERTIES + COMPILE_FLAGS "-Wall -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Os -mmcu=${BOARD}" + LINK_FLAGS "-Wall -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Os -mmcu=${BOARD}" + COMPILE_DEFINITIONS "F_CPU=${CLOCK}" +) + +add_custom_command(OUTPUT lolshield.hex COMMAND ${CMAKE_OBJCOPY} -O ihex -R .eeprom lolshield.elf lolshield.hex DEPENDS lolshield.elf) +add_custom_target(lolshield ALL DEPENDS lolshield.hex) + +add_custom_target(flash COMMAND ${AVRDUDE} ${FLASH_FLAGS} -D -Uflash:w:lolshield.hex:i DEPENDS lolshield) diff --git a/Charliplexing.c b/Charliplexing.c new file mode 100644 index 0000000..fcd3bd0 --- /dev/null +++ b/Charliplexing.c @@ -0,0 +1,503 @@ +/* + Charliplexing.cpp - Using timer2 with 1ms resolution + + Alex Wenger http://arduinobuch.wordpress.com/ + Matt Mets http://cibomahto.com/ + + Timer init code from MsTimer2 - Javier Valencia + Misc functions from Benjamin Sonnatg + + History: + 2009-12-30 - V0.0 wrote the first version at 26C3/Berlin + 2010-01-01 - V0.1 adding misc utility functions + (Clear, Vertical, Horizontal) comment are Doxygen complaints now + 2010-05-27 - V0.2 add double-buffer mode + 2010-08-18 - V0.9 Merge brightness and grayscale + + 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 +#include +#include +#include "Charliplexing.h" + +volatile unsigned int LedSign_tcnt2; + + +typedef struct _videoPage { + uint8_t pixels[SHADES][48]; // TODO: is 48 right? +} videoPage; + +/* ----------------------------------------------------------------- */ +/** Table for the LED multiplexing cycles + * Each frame is made of 24 bytes (for the 24 display cycles) + * There are SHADES frames per buffer in grayscale mode (one for each brigtness) + * and twice that many to support double-buffered grayscale. + */ +videoPage leds[2]; + +/// Determines whether the display is in single or double buffer mode +uint8_t displayMode = SINGLE_BUFFER; + +/// Flag indicating that the display page should be flipped as soon as the +/// current frame is displayed +volatile bool videoFlipPage = false; + +/// Pointer to the buffer that is currently being displayed +videoPage* displayBuffer; + +/// Pointer to the buffer that should currently be drawn to +videoPage* workBuffer; + +/// Flag indicating that the timer buffer should be flipped as soon as the +/// current frame is displayed +volatile bool videoFlipTimer = false; + + +// Timer counts to display each page for, plus off time +typedef struct timerInfo { + uint8_t counts[SHADES]; + uint8_t prescaler[SHADES]; +} timerInfo; + +// Double buffer the timing information, of course. +timerInfo* frontTimer; +timerInfo* backTimer; + +timerInfo* tempTimer; + +timerInfo timer[2]; + +// Record a slow and fast prescaler for later use +typedef struct prescalerInfo { + uint8_t relativeSpeed; + uint8_t TCCR2; +} prescalerInfo; + +// TODO: Generate these based on processor type and clock speed +prescalerInfo slowPrescaler = {1, 0x03}; +//prescalerInfo fastPrescaler = {32, 0x01}; +prescalerInfo fastPrescaler = {4, 0x02}; + +static bool initialized = false; + +/// Uncomment to set analog pin 5 high during interrupts, so that an +/// oscilloscope can be used to measure the processor time taken by it +//#define MEASURE_ISR_TIME +//#ifdef MEASURE_ISR_TIME +//uint8_t statusPIN = 19; +//#endif + +typedef struct LEDPosition { + uint8_t high; + uint8_t low; +} LEDPosition; + + +/* ----------------------------------------------------------------- */ +/** Table for LED Position in leds[] ram table + */ + +const LEDPosition ledMap[126] = { + {13, 5}, {13, 6}, {13, 7}, {13, 8}, {13, 9}, {13,10}, {13,11}, {13,12}, + {13, 4}, { 4,13}, {13, 3}, { 3,13}, {13, 2}, { 2,13}, + {12, 5}, {12, 6}, {12, 7}, {12, 8}, {12, 9}, {12,10}, {12,11}, {12,13}, + {12, 4}, { 4,12}, {12, 3}, { 3,12}, {12, 2}, { 2,12}, + {11, 5}, {11, 6}, {11, 7}, {11, 8}, {11, 9}, {11,10}, {11,12}, {11,13}, + {11, 4}, { 4,11}, {11, 3}, { 3,11}, {11, 2}, { 2,11}, + {10, 5}, {10, 6}, {10, 7}, {10, 8}, {10, 9}, {10,11}, {10,12}, {10,13}, + {10, 4}, { 4,10}, {10, 3}, { 3,10}, {10, 2}, { 2,10}, + { 9, 5}, { 9, 6}, { 9, 7}, { 9, 8}, { 9,10}, { 9,11}, { 9,12}, { 9,13}, + { 9, 4}, { 4, 9}, { 9, 3}, { 3, 9}, { 9, 2}, { 2, 9}, + { 8, 5}, { 8, 6}, { 8, 7}, { 8, 9}, { 8,10}, { 8,11}, { 8,12}, { 8,13}, + { 8, 4}, { 4, 8}, { 8, 3}, { 3, 8}, { 8, 2}, { 2, 8}, + { 7, 5}, { 7, 6}, { 7, 8}, { 7, 9}, { 7,10}, { 7,11}, { 7,12}, { 7,13}, + { 7, 4}, { 4, 7}, { 7, 3}, { 3, 7}, { 7, 2}, { 2, 7}, + { 6, 5}, { 6, 7}, { 6, 8}, { 6, 9}, { 6,10}, { 6,11}, { 6,12}, { 6,13}, + { 6, 4}, { 4, 6}, { 6, 3}, { 3, 6}, { 6, 2}, { 2, 6}, + { 5, 6}, { 5, 7}, { 5, 8}, { 5, 9}, { 5,10}, { 5,11}, { 5,12}, { 5,13}, + { 5, 4}, { 4, 5}, { 5, 3}, { 3, 5}, { 5, 2}, { 2, 5}, +}; + + +/* ----------------------------------------------------------------- */ +/** Constructor : Initialize the interrupt code. + * should be called in setup(); + */ +void LedSignInit(uint8_t mode) +{ +//#ifdef MEASURE_ISR_TIME +// pinMode(statusPIN, OUTPUT); +// digitalWrite(statusPIN, LOW); +//#endif + + float prescaler = 0.0; + +#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega48__) || defined (__AVR_ATmega88__) || defined (__AVR_ATmega328P__) || (__AVR_ATmega1280__) + TIMSK2 &= ~(1<= 1000000UL) && (F_CPU <= 16000000UL)) { // prescaler set to 64 + TCCR2B |= ((1< 16Mhz, prescaler set to 128 + TCCR2B |= (1<= 1000000UL) && (F_CPU <= 16000000UL)) { // prescaler set to 64 + TCCR2 |= (1< 16Mhz, prescaler set to 128 + TCCR2 |= ((1<= 1000000UL) && (F_CPU <= 16000000UL)) { // prescaler set to 64 + TCCR2 |= ((1< 16Mhz, prescaler set to 256 + TCCR2 |= (1< 7)?24:0); + uint8_t work = _BV(pin_high & 0x07); + + // If we aren't in grayscale mode, just map any pin brightness to max + if (c > 0 && !(displayMode & GRAYSCALE)) { + c = SHADES-1; + } + + int i; + for (i = 0; i < SHADES-1; i++) { + if( c > i ) { + workBuffer->pixels[i][bufferNum] |= work; // ON + } + else { + workBuffer->pixels[i][bufferNum] &= ~work; // OFF + } + } +} + + +/* Set the overall brightness of the screen + * @param brightness LED brightness, from 0 (off) to 127 (full on) + */ + +void LedSignSetBrightness(uint8_t brightness) +{ + // An exponential fit seems to approximate a (perceived) linear scale + float brightnessPercent = ((float)brightness / 127)*((float)brightness / 127); + uint8_t difference = 0; + + /* ---- This needs review! Please review. -- thilo */ + // set up page counts + // TODO: make SHADES a function parameter. This would require some refactoring. + int start = 15; + int max = 255; + float scale = 1.5; + float delta = pow( max - start , 1.0 / scale) / (SHADES - 1); + uint8_t pageCounts[SHADES]; + + pageCounts[0] = max - start; + uint8_t i; + for (i=1; icounts[i] = pageCounts[i]; + // TODO: Generate this dynamically + frontTimer->prescaler[i] = slowPrescaler.TCCR2; + } + } + + // Wait until the previous brightness request goes through + while( videoFlipTimer ) { + _delay_ms(1); + } + + // Compute on time for each of the pages + // Use the fast timer; slow timer is only useful for < 3 shades. + for (i = 0; i < SHADES - 1; i++) { + uint8_t interval = 255 - pageCounts[i]; + + backTimer->counts[i] = 255 - brightnessPercent + * interval + * fastPrescaler.relativeSpeed; + backTimer->prescaler[i] = fastPrescaler.TCCR2; + difference += backTimer->counts[i] - pageCounts[i]; + } + + // Compute off time + backTimer->counts[SHADES - 1] = 255 - difference; + backTimer->prescaler[SHADES - 1] = slowPrescaler.TCCR2; + + /* ---- End of "This needs review! Please review." -- thilo */ + + // Have the ISR update the timer registers next run + videoFlipTimer = true; +} + + +/* ----------------------------------------------------------------- */ +/** The Interrupt code goes here ! + */ +ISR(TIMER2_OVF_vect) { + DDRD = 0x0; + DDRB = 0x0; + //#ifdef MEASURE_ISR_TIME + // digitalWrite(statusPIN, HIGH); + //#endif + + // For each cycle, we have potential SHADES pages to display. + // Once every page has been displayed, then we move on to the next + // cycle. + + // 24 Cycles of Matrix + static uint8_t cycle = 0; + + // SHADES pages to display + static uint8_t page = 0; + + TCCR2B = frontTimer->prescaler[page]; + TCNT2 = frontTimer->counts[page]; + + if ( page < SHADES - 1) { + + if (cycle < 6) { + DDRD = _BV(cycle+2) | displayBuffer->pixels[page][cycle*2]; + PORTD = displayBuffer->pixels[page][cycle*2]; + + DDRB = displayBuffer->pixels[page][cycle*2+1]; + PORTB = displayBuffer->pixels[page][cycle*2+1]; + } else if (cycle < 12) { + DDRD = displayBuffer->pixels[page][cycle*2]; + PORTD = displayBuffer->pixels[page][cycle*2]; + + DDRB = _BV(cycle-6) | displayBuffer->pixels[page][cycle*2+1]; + PORTB = displayBuffer->pixels[page][cycle*2+1]; + } else if (cycle < 18) { + DDRD = _BV(cycle+2-12) | displayBuffer->pixels[page][cycle*2]; + PORTD = displayBuffer->pixels[page][cycle*2]; + + DDRB = displayBuffer->pixels[page][cycle*2+1]; + PORTB = displayBuffer->pixels[page][cycle*2+1]; + } else { + DDRD = displayBuffer->pixels[page][cycle*2]; + PORTD = displayBuffer->pixels[page][cycle*2]; + + DDRB = _BV(cycle-6-12) | displayBuffer->pixels[page][cycle*2+1]; + PORTB = displayBuffer->pixels[page][cycle*2+1]; + } + } + else { + // Turn everything off + DDRD = 0x0; + DDRB = 0x0; + } + + page++; + + if (page >= SHADES) { + page = 0; + cycle++; + } + + if (cycle > 24) { + cycle = 0; + + // If the page should be flipped, do it here. + if (videoFlipPage && (displayMode & DOUBLE_BUFFER)) + { + // TODO: is this an atomic operation? + videoFlipPage = false; + + videoPage* temp = displayBuffer; + displayBuffer = workBuffer; + workBuffer = temp; + } + + if (videoFlipTimer) { + videoFlipTimer = false; + + tempTimer = frontTimer; + frontTimer = backTimer; + backTimer = tempTimer; + } + } + + //#ifdef MEASURE_ISR_TIME + // digitalWrite(statusPIN, LOW); + //#endif +} diff --git a/Charliplexing.h b/Charliplexing.h new file mode 100644 index 0000000..3a912d6 --- /dev/null +++ b/Charliplexing.h @@ -0,0 +1,33 @@ +/* + Charliplexing.h - Library for controlling the charliplexed led board + from JimmiePRodgers.com + Created by Alex Wenger, December 30, 2009. + Modified by Matt Mets, May 28, 2010. + Released into the public domain. +*/ + +#ifndef Charliplexing_h +#define Charliplexing_h + +#include +#include + +#define SINGLE_BUFFER 0 +#define DOUBLE_BUFFER 1 +#define GRAYSCALE 2 + +#define DISPLAY_COLS 14 // Number of columns in the display +#define DISPLAY_ROWS 9 // Number of rows in the display +#define SHADES 8 // Number of distinct shades to display, including black, i.e. OFF + +extern volatile unsigned int LedSign_tcnt2; + +void LedSignInit(uint8_t mode); +void LedSignSet(uint8_t x, uint8_t y, uint8_t c); +void LedSignSetBrightness(uint8_t brightness); +void LedSignFlip(bool blocking); +void LedSignClear(int set); +void LedSignHorizontal(int y, int set); +void LedSignVertical(int x, int set); + +#endif diff --git a/lolshield.c b/lolshield.c new file mode 100644 index 0000000..fe9559f --- /dev/null +++ b/lolshield.c @@ -0,0 +1,182 @@ +/* + Basic LoL Shield Test + + Writen for the LoL Shield, designed by Jimmie Rodgers: + http://jimmieprodgers.com/kits/lolshield/ + + This needs the Charliplexing library, which you can get at the + LoL Shield project page: http://code.google.com/p/lolshield/ + + Created by Jimmie Rodgers on 12/30/2009. + Adapted from: http://www.arduino.cc/playground/Code/BitMath + + History: + December 30, 2009 - V1.0 first version written at 26C3/Berlin + + This is free software; you can redistribute it and/or + modify it under the terms of the GNU Version 3 General Public + License as published by the Free Software Foundation; + 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 +#include +#include //AVR library for writing to ROM +#include +#include "Charliplexing.h" //Imports the library, which needs to be + //Initialized in setup. + +const int blinkdelay = 100; //Sets the time each frame is shown + +/* +The BitMap array is what contains the frame data. Each line is one full frame. +Since each number is 16 bits, we can easily fit all 14 LEDs per row into it. +The number is calculated by adding up all the bits, starting with lowest on +the left of each row. 18000 was chosen as the kill number, so make sure that +is at the end of the matrix, or the program will continue to read into memory. + +Here PROGMEM is called, which stores the array into ROM, which leaves us +with our RAM. You cannot change the array during run-time, only when you +upload to the Arduino. You will need to pull it out of ROM, which is covered +below. If you want it to stay in RAM, just delete PROGMEM +*/ +const uint16_t BitMap[][9] PROGMEM = { +//Diaganal swipe across the screen +{1, 0, 0, 0, 0, 0, 0, 0, 0}, +{3, 1, 0, 0, 0, 0, 0, 0, 0}, +{7, 3, 1, 0, 0, 0, 0, 0, 0}, +{15, 7, 3, 1, 0, 0, 0, 0, 0}, +{31, 15, 7, 3, 1, 0, 0, 0, 0}, +{63, 31, 15, 7, 3, 1, 0, 0, 0}, +{127, 63, 31, 15, 7, 3, 1, 0, 0}, +{255, 127, 63, 31, 15, 7, 3, 1, 0}, +{511, 255, 127, 63, 31, 15, 7, 3, 1}, +{1023, 511, 255, 127, 63, 31, 15, 7, 3}, +{2047, 1023, 511, 255, 127, 63, 31, 15, 7}, +{4095, 2047, 1023, 511, 255, 127, 63, 31, 15}, +{8191, 4095, 2047, 1023, 511, 255, 127, 63, 31}, +{16383, 8191, 4095, 2047, 1023, 511, 255, 127, 63}, +{16383, 16383, 8191, 4095, 2047, 1023, 511, 255, 127}, +{16383, 16383, 16383, 8191, 4095, 2047, 1023, 511, 255}, +{16383, 16383, 16383, 16383, 8191, 4095, 2047, 1023, 511}, +{16383, 16383, 16383, 16383, 16383, 8191, 4095, 2047, 1023}, +{16383, 16383, 16383, 16383, 16383, 16383, 8191, 4095, 2047}, +{16383, 16383, 16383, 16383, 16383, 16383, 16383, 8191, 4095}, +{16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383, 8191}, +{16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383}, +{16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383}, +{16382, 16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383}, +{16380, 16382, 16383, 16383, 16383, 16383, 16383, 16383, 16383}, +{16376, 16380, 16382, 16383, 16383, 16383, 16383, 16383, 16383}, +{16368, 16376, 16380, 16382, 16383, 16383, 16383, 16383, 16383}, +{16352, 16368, 16376, 16380, 16382, 16383, 16383, 16383, 16383}, +{16320, 16352, 16368, 16376, 16380, 16382, 16383, 16383, 16383}, +{16256, 16320, 16352, 16368, 16376, 16380, 16382, 16383, 16383}, +{16128, 16256, 16320, 16352, 16368, 16376, 16380, 16382, 16383}, +{15872, 16128, 16256, 16320, 16352, 16368, 16376, 16380, 16382}, +{15360, 15872, 16128, 16256, 16320, 16352, 16368, 16376, 16380}, +{14336, 15360, 15872, 16128, 16256, 16320, 16352, 16368, 16376}, +{12288, 14336, 15360, 15872, 16128, 16256, 16320, 16352, 16368}, +{8192, 12288, 14336, 15360, 15872, 16128, 16256, 16320, 16352}, +{0, 8192, 12288, 14336, 15360, 15872, 16128, 16256, 16320}, +{0, 0, 8192, 12288, 14336, 15360, 15872, 16128, 16256}, +{0, 0, 0, 8192, 12288, 14336, 15360, 15872, 16128}, +{0, 0, 0, 0, 8192, 12288, 14336, 15360, 15872}, +{0, 0, 0, 0, 0, 8192, 12288, 14336, 15360}, +{0, 0, 0, 0, 0, 0, 8192, 12288, 14336}, +{0, 0, 0, 0, 0, 0, 0, 8192, 12288}, +{0, 0, 0, 0, 0, 0, 0, 0, 8192}, +{0, 0, 0, 0, 0, 0, 0, 0, 0}, + +//Horizontal swipe +{1, 1, 1, 1, 1, 1, 1, 1, 1} , +{3, 3, 3, 3, 3, 3, 3, 3, 3}, +{7, 7, 7, 7, 7, 7, 7, 7, 7}, +{15, 15, 15, 15, 15, 15, 15, 15, 15}, +{31, 31, 31, 31, 31, 31, 31, 31, 31}, +{63, 63, 63, 63, 63, 63, 63, 63, 63}, +{127, 127, 127, 127, 127, 127, 127, 127, 127}, +{255, 255, 255, 255, 255, 255, 255, 255, 255}, +{511, 511, 511, 511, 511, 511, 511, 511, 511}, +{1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023, 1023}, +{2047, 2047, 2047, 2047, 2047, 2047, 2047, 2047, 2047}, +{4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095, 4095}, +{8191, 8191, 8191, 8191, 8191, 8191, 8191, 8191, 8191}, +{16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383, 16383}, +{16382, 16382, 16382, 16382, 16382, 16382, 16382, 16382, 16382}, +{16380, 16380, 16380, 16380, 16380, 16380, 16380, 16380, 16380}, +{16376, 16376, 16376, 16376, 16376, 16376, 16376, 16376, 16376}, +{16368, 16368, 16368, 16368, 16368, 16368, 16368, 16368, 16368}, +{16352, 16352, 16352, 16352, 16352, 16352, 16352, 16352, 16352}, +{16320, 16320, 16320, 16320, 16320, 16320, 16320, 16320, 16320}, +{16256, 16256, 16256, 16256, 16256, 16256, 16256, 16256, 16256}, +{16128, 16128, 16128, 16128, 16128, 16128, 16128, 16128, 16128}, +{15872, 15872, 15872, 15872, 15872, 15872, 15872, 15872, 15872}, +{15360, 15360, 15360, 15360, 15360, 15360, 15360, 15360, 15360}, +{14336, 14336, 14336, 14336, 14336, 14336, 14336, 14336, 14336}, +{12288, 12288, 12288, 12288, 12288, 12288, 12288, 12288, 12288}, +{8192, 8192, 8192, 8192, 8192, 8192, 8192, 8192, 8192}, +{0, 0, 0, 0, 0, 0, 0, 0, 0}, +{18000} +}; + +void DisplayBitMap() +{ + bool run=true; //While this is true, the screen updates + uint8_t frame = 0; //Frame counter + uint8_t line = 0; //Row counter + uint8_t led; + unsigned long data; //Temporary storage of the row data + + while(run == true) { + for(line = 0; line < 9; line++) { + + //Here we fetch data from program memory with a pointer. + data = pgm_read_word_near (&BitMap[frame][line]); + + //Kills the loop if the kill number is found + if (data==18000){ + run=false; + } + + //This is where the bit-shifting happens to pull out + //each LED from a row. If the bit is 1, then the LED + //is turned on, otherwise it is turned off. + else for (led=0; led<14; ++led) { + if (data & (1<