Add missing doxygen ingroup tags (#1425)
So that the doxygen-descriptions end up in the right place
diff --git a/src/rp2_common/pico_flash/include/pico/flash.h b/src/rp2_common/pico_flash/include/pico/flash.h
index 07c0aa7..a08b72a 100644
--- a/src/rp2_common/pico_flash/include/pico/flash.h
+++ b/src/rp2_common/pico_flash/include/pico/flash.h
@@ -58,6 +58,7 @@
/**
* Initialize a core such that the other core can lock it out during \ref flash_safe_execute.
+ * \ingroup pico_flash
*
* \note This is not necessary for FreeRTOS SMP, but should be used when launching via \ref multicore_launch_core1
* \return true on success; there is no need to call \ref flash_safe_execute_core_deinit() on failure.
@@ -66,12 +67,14 @@
/**
* De-initialize work done by \ref flash_safe_execute_core_init
+ * \ingroup pico_flash
* \return true on success
*/
bool flash_safe_execute_core_deinit(void);
/**
* Execute a function with IRQs disabled and with the other core also not executing/reading flash
+ * \ingroup pico_flash
*
* \param func the function to call
* \param param the parameter to pass to the function
@@ -116,6 +119,7 @@
/**
* Internal method to return the flash safety helper implementation.
+ * \ingroup pico_flash
*
* Advanced users can provide their own implementation of this function to perform
* different inter-core coordination before disabling XIP mode.
