added DI unit

platform/plat_compat.h

@@ -45,13 +45,20 @@
 
 // -------- Platform specific includes and defines ---------
 
+/// Feature flags:
+// PLAT_FLASHBANKS - has the Banks field on the Flash config struct
+// PLAT_NO_FLOATING_INPUTS - can't have digital inputs with no pull resistor
+// PLAT_USB_PHYCLOCK - requires special config of phy clock for USB
+// PLAT_USB_OTGFS - uses the USB OTG IP, needs different config code
+
 #if defined(GEX_PLAT_F103_BLUEPILL)
 
     // platform name for the version string
     #define GEX_PLATFORM "STM32F103-Bluepill"
 
-    // This platform has the Banks field on the Flash config struct for settings save
+    // feature flags
     #define PLAT_FLASHBANKS 1
+    #define PLAT_NO_FLOATING_INPUTS 1
 
     #include <stm32f1xx.h>
     #include <stm32f1xx_hal.h>

platform/platform.c

@@ -10,6 +10,7 @@
 
 #include "units/pin/unit_pin.h"
 #include "units/digital_out/unit_dout.h"
+#include "units/digital_in/unit_din.h"
 #include "units/neopixel/unit_neopixel.h"
 #include "units/test/unit_test.h"
 
@@ -24,6 +25,7 @@ void plat_init_resources(void)
     // --- Common unit drivers ---
     ureg_add_type(&UNIT_PIN);
     ureg_add_type(&UNIT_DOUT);
+    ureg_add_type(&UNIT_DIN);
 
     #if HAVE_TEST_UNIT
         ureg_add_type(&UNIT_TEST);