![](/media/cache/profiles/nikki.png.50x50_q85.jpg)
Program allows for a rectangle displayed on SSD1306-based OLED display to be moved by x- and y-axis uisng two user potentiometers.
Dependencies: mbed Adafruit_GFX
main.cpp
- Committer:
- joeata2wh
- Date:
- 2016-03-21
- Revision:
- 6:02a058f2ec6f
- Parent:
- 5:a4fddd74263c
- Child:
- 7:5962e77516ac
File content as of revision 6:02a058f2ec6f:
/* Scan I2C bus on specified pins and prints out * the all address where an active device responds. * * By Joe Elsworth CTO of A2WH * Free use for all but no warranty, no promises. * Don't forget 3K pull-up resistors on sda,scl * * I tested this by soldering in a I2C chip known to respond at * address dec=120 hex=70 and the utility got the ack as expected. * when the chip was de-soldered it was no longer detected. */ #include "mbed.h" Serial pc(USBTX, USBRX); #define D_SDA PB_7 #define D_SCL PB_6 // sda=PB7, scl=PB_6 Pins specific to Nucleo-F303K8 // must change pins to match your board. I2C i2c(D_SDA, D_SCL); DigitalOut myled(LED1); int ack; int address; void scanI2C() { for(address=1;address<127;address++) { ack = i2c.write(address, "11", 1); if (ack == 0) { pc.printf("\tFound at %3d -- %3x\r\n", address,address); } wait(0.05); } } int main() { pc.baud(9600); pc.printf("I2C scanner \r\n"); scanI2C(); pc.printf("Finished Scan\r\n"); // just blink to let us know the CPU is alive while(1) { wait(5.0); myled = !myled; } }