Add ADC DMA example

adc/dma_capture/CMakeLists.txt

@@ -0,0 +1,20 @@
+add_executable(adc_dma_capture
+        dma_capture.c
+        )
+
+pico_generate_pio_header(adc_dma_capture ${CMAKE_CURRENT_LIST_DIR}/resistor_dac.pio)
+
+target_link_libraries(adc_dma_capture
+		pico_stdlib
+		hardware_adc
+		hardware_dma
+		# For the dummy output:
+		hardware_pio
+		pico_multicore
+		)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(adc_dma_capture)
+
+# add url via pico_set_program_url
+example_auto_set_url(adc_dma_capture)