stm32: Apply review feedback.

dpgeorge · dpgeorge · commit 750eaddc296c · 2024-02-28T00:13:15.000+11:00
Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/ports/stm32/boards/make-pins.py b/ports/stm32/boards/make-pins.py
@@ -59,7 +59,8 @@ class Stm32Pin(boardgen.Pin):
     def __init__(self, cpu_pin_name):
         super().__init__(cpu_pin_name)
 
-        # Pins ending in "_C" are special analog-only pins.
+        # Pins ending in "_C" correspond to the analog-only pad of a pair
+        # of dual (analog) pads found on H7 MCUs (eg PA0 and PA0_C pair).
         self._analog_only = cpu_pin_name.endswith("_C")
         if self._analog_only:
             cpu_pin_name = cpu_pin_name[:-2]
diff --git a/ports/stm32/boards/stm32f4xx_prefix.c b/ports/stm32/boards/stm32f4xx_prefix.c
@@ -45,4 +45,6 @@
         .adc_num = p_adc_num, \
         .adc_channel = p_adc_channel, \
     }
+#else
+#define PIN_ANALOG DUAL_PAD_SUPPORT_NOT_ENABLED__CONFIGURE__MICROPY_HW_ANALOG_SWITCH_Pxy
 #endif

Original file line number	Diff line number	Diff line change
`@@ -45,4 +45,6 @@`
`45`	`45`	`.adc_num = p_adc_num, \`
`46`	`46`	`.adc_channel = p_adc_channel, \`
`47`	`47`	`}`
	`48`	`+#else`
	`49`	`+#define PIN_ANALOG DUAL_PAD_SUPPORT_NOT_ENABLED__CONFIGURE__MICROPY_HW_ANALOG_SWITCH_Pxy`
`48`	`50`	`#endif`