![](/media/cache/profiles/nikki.png.50x50_q85.jpg)
I2C_2 bus scanner for STM32L476RG.
main.cpp
- Committer:
- joeata2wh
- Date:
- 2016-03-20
- Revision:
- 1:2363995f603f
- Parent:
- 0:befb557584fb
- Child:
- 2:e90c47d4f358
File content as of revision 1:2363995f603f:
/* Scan I2C bus on specified pins and prints out * the address of all pins where a active responder * is found. * * By Joe Elsworth CTO of A2WH * Free use for al but no warranty, no promises. * Don't forget 3K pullup sda,scl */ #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); void scanI2C() { int address; int ack; 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"); ack = i2c.write(71, "11", 1); while(1) { wait(5.0); myled = !myled; } }