Small API additions and minor fixes (#406)

* Add missing DREQ_s

* store actual clock frequency in clock_configure (fixes #368)

* use dma DREQ values defined in dreqs/dma.h

* Fix hw_is_claimed, and add xxx_is_claimed APIs

* Add some PIO irq helper methods

* Add DMA channel IRQ status getter and clear methods

* Implement the correct PIO IRQ status/clear methods (good to have methods here as the h/w interrupt registers are super confusing)

* fix pico_multicore dependencies

* add missing wrapper func __aeabi_f2d

* Further DMA/PIO IRQ API cleanup (and review fixes)

* add PICO_INT64_OPS_IN_RAM flag

src/rp2_common/pico_multicore/CMakeLists.txt

@@ -6,7 +6,7 @@ if (NOT TARGET pico_multicore)
 
     target_include_directories(pico_multicore INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)
 
-    target_link_libraries(pico_multicore INTERFACE pico_sync)
+    target_link_libraries(pico_multicore INTERFACE pico_sync hardware_irq)
 endif()
 
 

src/rp2_common/pico_multicore/multicore.c

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include "pico/stdlib.h"
 #include "pico/multicore.h"
 #include "hardware/sync.h"
 #include "hardware/irq.h"