add some remnants of rp2040 debugging hell (see message)

This commit has a few commented lines in CMakeLists.txt for compiling
Arduino sketches for the RP2040 using
<https://github.com/earlephilhower/arduino-pico>. I used this to sanity
check if the same use of the Wire library that I used for the Arduino
would work on the RP2040, and to my surprise, it didn't.

Turns out the ATmega328P's TWI interface supports a thing where I2C
masters can be addressed as slaves in a multi-master configuration (see
section 21.9.5 of the datasheet). This is used in the puzzle box, and
not (natively) supported by the RP2040 processor.

1 files changed, 0 insertions, 1 deletions

diff --git a/puzzle/dummy/main.cpp b/puzzle/dummy/main.cpp
index df5b6f5..3d84679 100644
--- a/puzzle/dummy/main.cpp
+++ b/puzzle/dummy/main.cpp
@@ -25,7 +25,6 @@ const i2c_addr_t PBDRV_MOD_ADDR = ADDR_RX;
 
 void setup() {
 	pbdrv_setup();
-	Serial.begin(115200);
 }
 
 void loop() {