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I2C_scanner
An ultimate I2C scanner. To be ultimate it should check speeds tbh. Arduino port really
Diff: main.cpp
- Revision:
- 0:eac9f05ba8e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Sat Jul 07 13:18:17 2018 +0000 @@ -0,0 +1,34 @@ +#include "mbed.h" + +Serial pc(USBTX, USBRX, 115200); + + +I2C i2c(PC_1, PC_0); // SDA, SCL L476 all on the left side +//I2C i2c(PB_9, PB_8); // SDA, SCL arduino pins +//I2C i2c(PB_14, PB_13); // SDA, SCL +DigitalOut led(D13); + +int main() +{ + i2c.frequency(100000); + while (1) { + pc.printf("Searching for I2C devices...\n\r"); + + int count = 0; + for (int address = 0; address < 255; address +=2) { // check only for device's read addres + if (!i2c.write(address, NULL, 0)) { // 0 returned is ok + pc.printf("I2C device found at address 0x%02X (0x%02X in 8-bit)\n\r", address >> 1, address); // the address is without LSB, which is R/W flag. shoft it right once + count++; + led = 1; + } + wait(0.02); + } + if (count) + pc.printf("%d", count); + else + pc.printf("No"); + pc.printf(" device%c found\n\r\n", count == 1?'\0':'s'); + led = 0; + wait (1.8); + } +} \ No newline at end of file