ports/rp2: Add support for USB devices defined in Python.

Currently disabled by default, set MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE to
enable.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

ports/rp2/CMakeLists.txt

@@ -108,6 +108,7 @@ set(MICROPY_SOURCE_LIB
     ${MICROPY_DIR}/shared/tinyusb/mp_cdc_common.c
     ${MICROPY_DIR}/shared/tinyusb/mp_usbd.c
     ${MICROPY_DIR}/shared/tinyusb/mp_usbd_descriptor.c
+    ${MICROPY_DIR}/shared/tinyusb/mp_usbd_runtime.c
 )
 
 set(MICROPY_SOURCE_DRIVERS
@@ -146,6 +147,7 @@ set(MICROPY_SOURCE_QSTR
     ${MICROPY_DIR}/shared/readline/readline.c
     ${MICROPY_DIR}/shared/runtime/mpirq.c
     ${MICROPY_DIR}/shared/runtime/sys_stdio_mphal.c
+    ${MICROPY_DIR}/shared/tinyusb/mp_usbd_runtime.c
     ${MICROPY_PORT_DIR}/machine_adc.c
     ${MICROPY_PORT_DIR}/machine_i2c.c
     ${MICROPY_PORT_DIR}/machine_pin.c

ports/rp2/main.c

@@ -221,6 +221,10 @@ int main(int argc, char **argv) {
         mp_thread_deinit();
         #endif
         soft_timer_deinit();
+        #if MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
+        mp_usbd_deinit();
+        #endif
+
         gc_sweep_all();
         mp_deinit();
     }

ports/rp2/mpconfigport.h

@@ -52,6 +52,11 @@
 #ifndef MICROPY_HW_USB_MSC
 #define MICROPY_HW_USB_MSC (0)
 #endif
+
+#ifndef MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
+// Enable to support machine.USBDevice
+#define MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE    (0)
+#endif
 #endif
 
 #ifndef MICROPY_CONFIG_ROM_LEVEL