Example application for two 16x8 Adafruit LED Backpacks to make a 32 x 8 matrix.
Dependencies: Adafruit_32x8matrix
Fork of Adafruit_LEDBackpack_16x8_App by
This project uses two 16x8 1.2" LED Matrix + Backpacks stuck together to make a 32x8 double-length matrix.
main.cpp
- Committer:
- maclobdell
- Date:
- 2017-04-08
- Revision:
- 4:8641e4da6744
- Parent:
- 2:ffe5cf2557e3
- Child:
- 5:f2820d1efc08
- Child:
- 6:8d2eb79a4baf
File content as of revision 4:8641e4da6744:
#include "mbed.h" #include "Adafruit_LEDBackpack.h" #include "Adafruit_GFX.h" I2C i2c(D14, D15); //notes and todos- //need to make the quad display with text scroll into its own class //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 //mpl - something with stdio screwing things up. need to define serial port to use for debug Serial pc (USBTX,USBRX); Adafruit_16x8matrix matrix = Adafruit_16x8matrix(&i2c); Adafruit_16x8matrix matrix2 = Adafruit_16x8matrix(&i2c); void scrollText(char * buffer, uint8_t buf_len, uint8_t speed); void myidlethread(void); int main() { matrix2.begin(0x71); matrix2.setBrightness(1); matrix2.setRotation(2); matrix2.clear(); matrix2.writeDisplay(); matrix.begin(0x70); matrix.setBrightness(1); matrix.clear(); matrix.writeDisplay(); char buffer [50]; sprintf (buffer, "IoT Lab\0"); while(1) { scrollText(buffer,strlen(buffer), 1000); Thread::attach_idle_hook (myidlethread); Thread::wait(10000); } } void myidlethread(void) { sleep(); //go to sleep, wait for an interrupt } void scrollText(char * buffer, uint8_t buf_len, uint8_t speed) { //pc.printf("buffer = %s, len = %d\r\n", buffer, buf_len); /* 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); matrix2.writeDisplay(); }else { matrix.drawChar(xoff + j*6, 0, buffer[j], 1, 0, 1); matrix.writeDisplay(); matrix2.drawChar(xoff + j*6 - 16, 0, buffer[j], 1, 0, 1); matrix2.writeDisplay(); } } xoff--; /* decrement x offset*/ Thread::wait(1000/speed); matrix.clear(); matrix2.clear(); } }