Merge #19767 #19768

19767: boards: Fix I2C Arduino mapping r=chrysn a=maribu

### Contribution description

The correct macro name is `ARDUINO_I2C_UNO` for Arduino UNO compatible I2C bus location, or `ARDUINO_I2C_NANO` for Arduino Nano compatible I2C bus location.


19768: sys/arduino: move pseudo modules to makefiles r=chrysn a=maribu

### Contribution description

This allows using the arduino_pwm feature (which is translated into a module) without the arduino module; e.g. for only using the Arduino I/O mapping but not the Arduino API.


Co-authored-by: Marian Buschsieweke <marian.buschsieweke@posteo.net>

boards/common/arduino-atmega/include/arduino_iomap.h

@@ -63,7 +63,11 @@ extern "C" {
 /**
  * @brief   The only hardware I2C on ATmegas
  */
-#define ARDUINO_I2C0            I2C_DEV(0)
+#ifndef BOARD_ARDUINO_NANO
+#define ARDUINO_I2C_UNO         I2C_DEV(0)
+#else
+#define ARDUINO_I2C_NANO        I2C_DEV(0)
+#endif
 /** @} */
 
 /**

boards/common/arduino-due/include/arduino_iomap.h

@@ -56,7 +56,7 @@ extern "C" {
 /**
  * @brief   The only configured I2C
  */
-#define ARDUINO_I2C0            I2C_DEV(0)
+#define ARDUINO_I2C_UNO         I2C_DEV(0)
 /** @} */
 
 /**

makefiles/pseudomodules.inc.mk

@@ -33,6 +33,8 @@ PSEUDOMODULES += base64url
 ## be advertised in any other capacity, e.g. through @ref sys_auto_init_saul).
 PSEUDOMODULES += board_software_reset
 
+PSEUDOMODULES += arduino_pwm
+PSEUDOMODULES += arduino_serial_stdio
 PSEUDOMODULES += can_mbox
 PSEUDOMODULES += can_pm
 PSEUDOMODULES += can_raw

sys/arduino/Makefile.include

@@ -19,6 +19,3 @@ endif
 
 # include the Arduino headers
 INCLUDES += -I$(RIOTBASE)/sys/arduino/include
-
-PSEUDOMODULES += arduino_pwm
-PSEUDOMODULES += arduino_serial_stdio