Shield MaTrix V0.9b Introduction Shield MaTrix is a stackable Shield for Arduino, which makes it possible to learn programming using the most simple sensors on board.

Feature           

Arduino Mega compatible (recommended Freaduino Mega V1.4 (ATMega 2560 ) ) Support for Arduino Shield Support for wireless devices based on the nRF24L01, xBee Support Matrix LED 60mm 8X8 ( bright red , bright green , yellow) IR control ( remote control ) RGB LED ( to indicate the various parameters) Clock button ( on / off various settings ) Buzzer ( Alarm or pressing the remote control buttons ) Light sensor (automatic illumination matrices ) RTC ( real time clock ) I2C- interface (optional I / O)

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Voltage 9-24 V or USB controller (recommended 12V 2A)

Application Ideas    

Digital clock (synchronization NTP) with alarm Weather station (temperature-house street-cellar, pressure, humidity) Marquee (reading e-mail, social networks, etc.) Data transfer (on a similar device)

The principle of data display To display different information on the LED matrix display uses dynamic . At the same time information is displayed only one line ( corresponding LED lights (red and (or ) green ) ) , all other lines - repaid. The next step - the previous line is extinguished and ignited the next line ( for her current LEDs). Switching rows is very fast and eyes perceive this switch as a single image . To minimize the number of pins involved are two different types of chips: the shift registers (used for control columns) and a demultiplexer ( control lines). Shift registers included chain and connected via SPI ( pins involved are described below). Demultiplexer has three address inputs (DA0, DA1, DA2) - a combination of "0" and "1" at the entrances clearly points to one of the 8 outputs, which will be active level . Additionally the demultiplexer has control inputs (E1, E2, E3) - with the first two (E1 and E2, they are connected in our scheme ) organized a complete quenching of the matrix , and with the input E3 - organized brightness adjustment (using PWM) .

Interfaces 

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Interface for 4 bicolor LED matrix : o Set shift registers (74HC595 - 8 pcs.) To control the columns of LEDs o Demultiplexer 74HC138 to control the rows of LEDs and their brightness (via PWM) Built-in clock (RTC) - based on the DS1307 with battery backup battery (CR1220 or CR1226) Interface for RF- module nRF24L01 + Clock button (for example, to turn off the alarm sound ) IR receiver at 38kHz ( for remote control ) Wiring for connecting RGB- LED with common cathode or anode (selected by jumper ) Light sensor ( for example, to automatically adjust the brightness) Piezo transducer " beeper " I2C- interface xBee- interface Interface for Arduino- Shield

Pins on the board, involved on Arduino Mega: 

D5 - IR receiver

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D24 - clock button

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xBee: o

D16 - DIN

o

D17 - DOUT

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I2C (DS1307) o D20 - SDA o D21 - SCL

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RGB-LED (check): o D34 - red o D35 - Green o D36 - Blue

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nRF24L01 +: o D19 - RF_IRQ o D37 - RF_SCK o D38 - RF_MISO o D39 - RF_MOSI o D40 - RF_NSS o D41 - RF_CE

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D45 - squeaker

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A7 - light sensor

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Shift Registers: o D42 - SS o D51 - MOSI o D52 - SCK

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Demultiplex o D49 - DA0 o D48 - DA1 o D47 - DA2 o D44 - E3 (brightness) o D43 - E1, E2 (quenching)

Cautions Schematic The right side of the board (when viewed from the matrix) are:      

Clock button Interface for nRF24l01 + Place mounting RGB-LED Select jumper type LEDs (common anode or common cathode) IR receiver I2C - Interface

On the left side of the board are:  

Light sensor Piezo buzzer (beeper)

Specification Pin definition and Rating Mechanic Dimensions Necessary libraries To use the various components Shield MaTrix requires the following libraries: Displays information on the matrix - MaTrix - MaTrix (description of the library)   

Real-time clock (RTC) - RTClib - RTClib IR-receiver - IRremote IRremote nRF24L01 + - iBoardRF24 - iBoardRF24

Additionally required libraries that are used during operation of libraries: 

Wire

 

SPI digitalWriteFast

Features using libraries Only two libraries require little comment on their use: IR receiver

Since the IR receiver connected to digital pin of 5 must file / IRremote / IRremoteInt.h correct code as follows: ... // Arduino Mega #if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) //#define IR_USE_TIMER1 // tx = pin 11 //#define IR_USE_TIMER2 // tx = pin 9 #define IR_USE_TIMER3 // tx = pin 5 //#define IR_USE_TIMER4 // tx = pin 6 //#define IR_USE_TIMER5 // tx = pin 46 ...

nRF24L01+

Initialize the module as follows: ... //iBoardRF24 radio(CE,CSN,MOSI,MISO,SCK,IRQ); iBoardRF24 radio(41,40,39,38,37,19); ...

Library functions MaTrix To use the library in your sketch MaTrix need to declare a function void setup () to enter the following line of code: #include #include MaTrix mymatrix;

//connection library MaTrix //object creation mymatrix

Variables byte array[8][8] - main array. The data from this array is determined that the currently displayed on the LED matrix byte array[8][8] = { // An array of 64 bytes {B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 7 {B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 6

{B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 5 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 4 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 3 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 2 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 1 {B00000000, B00000000, B00000000, B00000000, B00000000} // строка 0 // red3 green3 red2 green0 };

B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, green2

red1

green1

red0

Each bit corresponds to the corresponding LED in the matrix. 0 - LED "extinguished", 1 - LED "lit"

byte shadow[8][8] - additional ("shadow") array. Library functions used for organizing various effects and scrolling text (data from the shadow of the array for a particular effect rewritten the rule of the "shadow" of the array in the main). byte shadow[8][8] = { //An array of {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 7 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 6 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 5 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 4 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 3 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 2 {B00000000, B00000000, B00000000, B00000000, B00000000}, // строка 1 {B00000000, B00000000, B00000000, B00000000, B00000000} // строка 0 // red3 green3 red2 green0 };

64 bytes B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, green2

Definitions // Color #define RED 0 #define GREEN 1 #define YELLOW 2 // delay iteration in "drawing" effects (ms) #define VSLOW 500 #define SLOW 150 #define MID 100 #define FAST 50 #define VFAST 25 // effects #define FADE 4 #define LEFT 3 #define UP 1 #define DOWN 2

red1

green1

red0

#define NONE 0 // hardware data #define BRIGHT 44 // brightness (pin 44 - PWM) #define LightSENS A7 // light sensor

Main function mymatrix.init(); Description: nitialization module.

mymatrix.clearLed(); Description:cleaning the display.

mymatrix.brightness(byte brightLevel); Description: sets the display brightness. brightLevel:brightness level (byte), a value of 255 - set to maximum brightness.

Example of use: mymatrix.brightness(177);

mymatrix.get Brightness(); Description: returns the current display brightness.

Example of use: Serial.println(mymatrix.getBrightness());

printString(String s, byte pos, byte color, unsigned char *Font, char effect, int speed); Description: displays the specified string. pos: starting position of the first character (byte). Counting from the right edge of the matrix, starting with 0. color: color (byte). Three predefined values - RED, GREEN, YELLOW *Font: a pointer to the font (unsigned char). Fonts available at the library: character - font5x8 (Latin), font6x8 (Latin and Cyrillic); digital - digit6x8bold, digit6x8future. Details about fonts, see the file fonts.c of the library archive MaTrix.

effect: the effect of the inscription (char). Available predefined values: LEFT, UP, DOWN (shift in the corresponding direction), FADE (manifestation), NONE (No effect - instantly). Default value NONE. speed: playback speed effect (int). Available predefined values: VSLOW, SLOW, MID, FAST, VFAST (from "very slow" to "very quickly"), default value - MID.

Example of use: mymatrix.printString("123", 3, GREEN, font6x8, UP, SLOW);

printRunningString(String s, byte color, unsigned char *Font, int speed); Description: displays the defined "running" line. color: color (byte). Three predefined values - RED, GREEN, YELLOW *Font: a pointer to the font (unsigned char). Fonts available at the library: character - font5x8 (Latin), font6x8 (Latin and Cyrillic); digital - digit6x8bold, digit6x8future. Details about fonts, see the file fonts.c of the library archive MaTrix. speed: playback speed effect (int). Available predefined values: VSLOW, SLOW, MID, FAST, VFAST (from "very slow" to "very quickly"), default value - MID.

Example of use: mymatrix.printRunningString("MaTrix test!", RED, font6x8, FAST);

Auxiliary functions printArray(); Description: displays the serial port the current state of the main array (array).

printShadow(); Description: displays the serial port the current state of the "shadow" of the array (shadow).

printChar(unsigned char sym, byte pos, byte color); Description: function changes the bulk (array)so that when displayed in the matrix in a predetermined position of the desired output color desired symbol. pos:starting character position (byte). Counting from the right edge of the matrix, starting with 0. color: color (byte). Three predefined values - RED, GREEN, YELLOW

Attention! Font that is used when calling the function must be defined using the setFont.

printCharShadow(unsigned char sym, byte pos, byte color); Description: function similar printChar, but is subject to modification "shadow" array (shadow).

printStr(unsigned char *s, byte pos, byte color); Description: function changes the bulk (array) so that when displayed on a matrix with a predetermined desired position of the array of characters displayed the color desired. *s: a pointer to an array of characters (unsigned char). pos: starting position of the first character (byte). Counting from the right edge of the matrix, starting with 0. color: color (byte). Three predefined values - RED, GREEN, YELLOW

Attention! Font that is used when calling the function must be defined using the setFont.

printStrShadow(unsigned char *s, byte pos, byte color); Description: function similar printChar, but is subject to modification "shadow" array (shadow).

References Current version of the library MaTrix