Fix magic number

rp2040/src/main.rs

@@ -22,6 +22,12 @@ use bsp::hal::{
     watchdog::Watchdog,
 };
 
+/// I2C address of this slave
+/// WARNING: Do not set this to 52 as there seems
+/// to be a device on the bus with that address. In
+/// that range, it might be an EEPROM!!!
+const I2C_ADDR: u8 = 25;
+
 /// Size of the i2c receive FIFO in bytes
 const I2C_RECV_FIFO_SIZE: usize = 16;
 
@@ -71,7 +77,7 @@ fn main() -> ! {
         pins.gpio18.into_mode(),
         pins.gpio19.into_mode(),
         &mut pac.RESETS,
-        25,
+        I2C_ADDR.into(),
     );
 
     let pwm_slices = Slices::new(pac.PWM, &mut pac.RESETS);