Mac Lobdell
Library to drive a pair of Adafruit 16x8 led matrices (powered by Adafruit LED Backpack) rotated end to end and stuck together to make a larger matrix.
Dependencies: Adafruit_LEDBackpack
Dependents: Adafruit_LEDBackpack_32x8_App RubeGoldberg
Revision 0:acc3c726ffe3, committed 2017-06-28
- Comitter:
- maclobdell
- Date:
- Wed Jun 28 19:32:40 2017 +0000
- Child:
- 1:ed6764fbda54
- Commit message:
- initial version of library for class that combines two 16x8 led matrices
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_32x8matrix.cpp Wed Jun 28 19:32:40 2017 +0000
@@ -0,0 +1,66 @@
+#include "mbed.h"
+
+#include "Adafruit_32x8matrix.h"
+
+Adafruit_32x8matrix::Adafruit_32x8matrix(I2C *i2c, uint8_t i2c_addr, uint8_t i2c_addr2, uint8_t rotation, uint8_t rotation2, uint8_t brightness)
+
+ : _i2c(*i2c), _matrix(&_i2c), _matrix2(&_i2c), _i2c_addr(i2c_addr), _i2c_addr2(i2c_addr2), _rotation(rotation), _rotation2(rotation2), _brightness(brightness)
+
+{
+
+ _matrix2.begin(_i2c_addr2);
+ _matrix2.setBrightness(_brightness);
+ _matrix2.setRotation(_rotation2);
+ _matrix2.clear();
+ _matrix2.writeDisplay();
+
+ _matrix.begin(_i2c_addr);
+ _matrix.setBrightness(_brightness);
+ _matrix.setRotation(_rotation);
+ _matrix.clear();
+ _matrix.writeDisplay();
+
+
+}
+
+void Adafruit_32x8matrix::scrollText(char * buffer, uint8_t buf_len, uint8_t speed)
+{
+
+
+ // code inspired by LOLShield library
+ int xoff=31;// set offset to the right end of the screen - must be signed
+ for(int i=0; i< (31 + buf_len*6 +10); i++){ //scrolling loop
+ for(int j=0; j<buf_len; j++){ //loop over all of the chars in the text
+ if(xoff > 15){
+ _matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1);
+ }else
+ {
+ _matrix.drawChar(xoff + j*6, 0, buffer[j], 1, 0, 1);
+ _matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1);
+ }
+ }
+ xoff--; // decrement x offset
+
+ _matrix.writeDisplay();
+ _matrix2.writeDisplay();
+ Thread::wait(1000/speed);
+ _matrix.clear();
+ _matrix2.clear();
+ }
+}
+
+
+void Adafruit_32x8matrix::showText(char * buffer, uint8_t buf_len, uint8_t speed)
+{
+ for(int j=0; j<buf_len; j++){ //loop over all of the chars in the text
+ _matrix.drawChar(j*6, 0, buffer[j], 1, 0, 1);
+ _matrix2.drawChar(j*6 - 16, 0, buffer[j], 1, 0, 1);
+ }
+ _matrix.writeDisplay();
+ _matrix2.writeDisplay();
+ Thread::wait(1000/speed);
+ _matrix.clear();
+ _matrix2.clear();
+
+}
+
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_32x8matrix.h Wed Jun 28 19:32:40 2017 +0000
@@ -0,0 +1,32 @@
+#ifndef _ADAFRUIT_32X8MATRIX_H_
+#define _ADAFRUIT_32X8MATRIX_H_
+
+#include "Adafruit_LEDBackpack.h"
+#include "Adafruit_GFX.h"
+
+//notes
+//220uA no leds on
+//default brightness - rises to 20mA at short peak then back down when scrolling hello
+//brightness = 1, rises to ~4mA at short peak then back down when scrolling hello
+
+
+class Adafruit_32x8matrix {
+public:
+ Adafruit_32x8matrix(I2C *i2c, uint8_t i2c_addr, uint8_t i2c_addr2, uint8_t rotation, uint8_t rotation2, uint8_t brightness);
+
+ void scrollText(char * , uint8_t , uint8_t );
+ void showText(char * , uint8_t , uint8_t );
+
+private:
+ I2C _i2c;
+ Adafruit_16x8matrix _matrix;
+ Adafruit_16x8matrix _matrix2;
+ uint8_t _i2c_addr;
+ uint8_t _i2c_addr2;
+ uint8_t _rotation;
+ uint8_t _rotation2;
+ uint8_t _brightness;
+
+};
+
+#endif
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adafruit_LEDBackpack.lib Wed Jun 28 19:32:40 2017 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/maclobdell/code/Adafruit_LEDBackpack/#b4ce71619694