Example sevenseg_test.ino

Firmware/Example/sevenseg_test/sevenseg_test.ino

@@ -0,0 +1,64 @@
+/*************************************************** 
+  This is a test sketch for Adafruit I2C LED Backpacks
+
+  Designed specifically to work with the Adafruit LED 7-Segment backpacks 
+  ----> http://www.adafruit.com/products/881
+  ----> http://www.adafruit.com/products/880
+  ----> http://www.adafruit.com/products/879
+  ----> http://www.adafruit.com/products/878
+
+  These displays use I2C to communicate, 2 pins are required to 
+  interface. There are multiple selectable I2C addresses. For backpacks
+  with 2 Address Select pins: 0x70, 0x71, 0x72 or 0x73. For backpacks
+  with 3 Address Select pins: 0x70 thru 0x77
+
+  Adafruit invests time and resources providing this open source code, 
+  please support Adafruit and open-source hardware by purchasing 
+  products from Adafruit!
+
+  Written by Tom Price after Limor Fried.
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include <Wire.h>
+#include "Adafruit_LEDBackpack.h"
+#include "Adafruit_GFX.h"
+
+Adafruit_7segment matrix1 = Adafruit_7segment();
+Adafruit_7segment matrix2 = Adafruit_7segment();
+Adafruit_7segment matrix3 = Adafruit_7segment();
+Adafruit_7segment matrix4 = Adafruit_7segment();
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println("7 Segment Backpack Test");
+
+  matrix1.begin(0x70);
+  matrix2.begin(0x71);
+  matrix3.begin(0x72);
+  matrix4.begin(0x73);
+}
+
+void loop() {
+  matrix1.writeDigitNum( 0, 0xa, false );
+  matrix1.writeDigitNum( 1, 0xd, true );
+  matrix1.writeDigitNum( 3, 0x7, false );
+  matrix1.writeDigitNum( 4, 0x0, false );
+  matrix1.writeDisplay();
+  matrix2.writeDigitNum( 0, 0xa, false );
+  matrix2.writeDigitNum( 1, 0xd, true );
+  matrix2.writeDigitNum( 3, 0x7, false );
+  matrix2.writeDigitNum( 4, 0x1, false );
+  matrix2.writeDisplay();
+  matrix3.writeDigitNum( 0, 0xa, false );
+  matrix3.writeDigitNum( 1, 0xd, true );
+  matrix3.writeDigitNum( 3, 0x7, false );
+  matrix3.writeDigitNum( 4, 0x2, false );
+  matrix3.writeDisplay();
+  matrix4.writeDigitNum( 0, 0xa, false );
+  matrix4.writeDigitNum( 1, 0xd, true );
+  matrix4.writeDigitNum( 3, 0x7, false );
+  matrix4.writeDigitNum( 4, 0x3, false );
+  matrix4.writeDisplay();
+  delay(500);
+}

Firmware/Source/main.c

@@ -3,7 +3,7 @@
 #include "adafruit_i2c_led_emu.h"
 #include "led.h"
 
-#define i2c_slave_address 0x72
+#define i2c_slave_address 0x70
 
 /**
   * @brief  Configure system clock