add rp2040 to library.properties; minor comment

library.properties

@@ -6,5 +6,5 @@ sentence=BPM clock generator for Arduino platform.
 paragraph=A Library to implement BPM clock tick calls using hardware interruption. Supported and tested on AVR boards(ATmega168/328, ATmega16u4/32u4 and ATmega2560) and ARM boards(Teensy, Seedstudio XIAO M0. ESP32 and STM32)
 category=Timing
 url=https://github.com/midilab/uClock
-architectures=avr,arm,samd,stm32,esp32
+architectures=avr,arm,samd,stm32,esp32,rp2040
 includes=uClock.h

src/platforms/rp2040.h

@@ -1,6 +1,7 @@
 #include <Arduino.h>
 #include "pico/sync.h"
 
+// todo: make this a build flag, so user can choose which method to use?
 #define MULTICORE
 
 #ifdef MULTICORE
@@ -22,8 +23,7 @@
         return true;
     }
 
-    void initTimer(uint32_t init_clock)
-    {
+    void initTimer(uint32_t init_clock) {
         // set up RPi interrupt timer
         // todo: actually should be -init_clock so that timer is set to start init_clock us after last tick, instead of init_clock us after finished processing last tick!
         add_repeating_timer_us(init_clock, &handlerISR, NULL, &timer);