A few silabs improvements

* Fix watchdog code crash.
* Define status LEDs for all boards.
* Add flash target to Makefile.
* Reduce build verbosity.

Author: tannewt

ports/silabs/Makefile

@@ -24,7 +24,7 @@
 #
 
 .SUFFIXES:				# ignore builtin rules
-.PHONY: all clean slc-clean slc-generate dependents
+.PHONY: all clean slc-clean slc-generate dependents flash
 # Values set by the initial generation
 PROJECTNAME = circuitpython_efr32
 # If the build directory is not given, make it reflect the board name.
@@ -142,10 +142,13 @@ $(SILABS_BUILD)/$(PROJECTNAME).Makefile: | $(HEADER_BUILD)/mpversion.h
 	+@$(MAKE) --no-print-directory slc-generate
 
 $(OUTPUT_DIR)/firmware.out: $(SILABS_BUILD)/pin_functions.h $(SILABS_BUILD)/pins.c $(OBJ) $(OBJS) $(LIB_FILES)
-	@echo 'Linking $(OUTPUT_DIR)/firmware.out'
-	@echo "$(OBJS) $(OBJ)" > $(OUTPUT_DIR)/linker_objs
-	$(CC) $(LD_FLAGS) @$(OUTPUT_DIR)/linker_objs $(LIBS) -o $(OUTPUT_DIR)/firmware.out
-	$(OBJCOPY) $(OUTPUT_DIR)/firmware.out -O binary $(OUTPUT_DIR)/firmware.bin
+	$(STEPECHO) 'Linking $(OUTPUT_DIR)/firmware.out'
+	$(Q)echo "$(OBJS) $(OBJ)" > $(OUTPUT_DIR)/linker_objs
+	$(Q)$(CC) $(LD_FLAGS) @$(OUTPUT_DIR)/linker_objs $(LIBS) -o $(OUTPUT_DIR)/firmware.out
+	$(Q)$(OBJCOPY) $(OUTPUT_DIR)/firmware.out -O binary $(OUTPUT_DIR)/firmware.bin
+
+flash: $(OUTPUT_DIR)/firmware.bin
+	$(Q)commander flash -d EFR32MG24 --address 08000000 $(OUTPUT_DIR)/firmware.bin
 
 $(OUTPUT_DIR)/firmware.hex:
 
@@ -174,37 +177,11 @@ endif
 	@sed -i 's/ autogen\// $(SILABS_BUILD)\/autogen\//g' $(SILABS_BUILD)/circuitpython_efr32.project.mak
 	@sed -i 's/-T"autogen\//-T"$(SILABS_BUILD)\/autogen\//g' $(SILABS_BUILD)/circuitpython_efr32.project.mak
 
-# tools/slc_cli_linux/bin/slc-cli/developer/exporter_templates/arm_gcc/arm_gcc.Makefile defines
-# ECHO = @
-# which is not compatible with py/mkenv.mk:
+# tools/slc_cli_linux/bin/slc-cli/developer/exporter_templates/arm_gcc/arm_gcc.Makefile includes
+# build rules and defines ECHO = @ when VERBOSE = 1 which is not compatible with py/mkenv.mk:
 # ECHO = @echo
 # so override ECHO
-$(OBJS): ECHO =
+$(OBJS): ECHO = $(Q)
 #$(OBJS):
 
-$(OUTPUT_DIR)/%.o: %.c
-	#@echo 'Building $<'
-	@$(MKDIR_P) $(@D)
-	@$(CC) $(CFLAGS) -c -o $@ $<
-
-$(OUTPUT_DIR)/%.o: %.cpp
-	#@echo 'Building $<'
-	@$(MKDIR_P) $(@D)
-	@$(CXX) $(CXXFLAGS) -c -o $@ $<
-
-$(OUTPUT_DIR)/%.o: %.cc
-	#@echo 'Building $<'
-	@$(MKDIR_P) $(@D)
-	@$(CXX) $(CXXFLAGS) -c -o $@ $<
-
-$(OUTPUT_DIR)/%.o: %.s
-	#@echo 'Building $<'
-	@$(MKDIR_P) $(@D)
-	@$(CC) $(ASMFLAGS) -c -o $@ $<
-
-$(OUTPUT_DIR)/%.o: %.S
-	#@echo 'Building $<'
-	@$(MKDIR_P) $(@D)
-	@$(CC) $(ASMFLAGS) -c -o $@ $<
-
 include $(TOP)/py/mkrules.mk

ports/silabs/README.md

@@ -34,6 +34,8 @@ Install necessary packages
     sudo apt install default-jre gcc-arm-none-eabi wget python3 python3-pip git git-lfs gettext uncrustify
     sudo python -m pip install --upgrade pip
 
+**Note** that this uses git lfs and will not link without it. The error is something like "Unknown file format" because git lfs has a text placeholder file.
+
 ## Supported boards ##
 
 | Board                       | Code         | Build CMD                                  |
@@ -71,6 +73,13 @@ Clean the project by using:
 
     make BOARD=explorerkit_xg24_brd2703a clean
 
+## Flashing CircuitPython
+
+Flash the project by using [Simplicity Commander](https://community.silabs.com/s/article/simplicity-commander?language=en_US):
+
+    make BOARD=explorerkit_xg24_brd2703a flash
+
+
 ## Running CircuitPython ##
 
 ### Connecting to the Serial Console ###

ports/silabs/boards/devkit_xg24_brd2601b/mpconfigboard.h

@@ -34,6 +34,10 @@
 #define BOARD_HSE_SOURCE (RCC_HSE_BYPASS)
 #define BOARD_HAS_LOW_SPEED_CRYSTAL (0)
 
+#define CIRCUITPY_RGB_STATUS_R (&pin_PD2)
+#define CIRCUITPY_RGB_STATUS_G (&pin_PA4)
+#define CIRCUITPY_RGB_STATUS_B (&pin_PB0)
+
 // On-board flash
 #define SPI_FLASH_MOSI_PIN          (&pin_PC3)
 #define SPI_FLASH_MISO_PIN          (&pin_PC2)

ports/silabs/boards/explorerkit_xg24_brd2703a/mpconfigboard.h

@@ -37,6 +37,8 @@
 #define BOARD_HSE_SOURCE (RCC_HSE_BYPASS)
 #define BOARD_HAS_LOW_SPEED_CRYSTAL (0)
 
+#define MICROPY_HW_LED_STATUS (&pin_PA4)
+
 #define DEFAULT_I2C_BUS_SDA   (&pin_PC5)
 #define DEFAULT_I2C_BUS_SCL   (&pin_PC4)
 #define DEFAULT_I2C_PERIPHERAL I2C0

ports/silabs/boards/sparkfun_thingplus_matter_mgm240p_brd2704a/mpconfigboard.h

@@ -34,6 +34,8 @@
 #define BOARD_HSE_SOURCE (RCC_HSE_BYPASS)
 #define BOARD_HAS_LOW_SPEED_CRYSTAL (0)
 
+#define MICROPY_HW_LED_STATUS (&pin_PA8)
+
 #define DEFAULT_I2C_BUS_SDA   (&pin_PB4)
 #define DEFAULT_I2C_BUS_SCL   (&pin_PB3)
 #define DEFAULT_I2C_PERIPHERAL I2C0

ports/silabs/common-hal/watchdog/WatchDogTimer.c

@@ -33,11 +33,16 @@
 #include "em_wdog.h"
 #include "em_cmu.h"
 
+static bool _wdt_init = false;
+
 void common_hal_watchdog_feed(watchdog_watchdogtimer_obj_t *self) {
     WDOGn_Feed(DEFAULT_WDOG);
 }
 
 void common_hal_watchdog_deinit(watchdog_watchdogtimer_obj_t *self) {
+    if (!_wdt_init) {
+        return;
+    }
     WDOG_Enable(false);
 }
 
@@ -105,6 +110,8 @@ void common_hal_watchdog_set_timeout(watchdog_watchdogtimer_obj_t *self,
 
         // Initializing watchdog with chosen settings
         WDOGn_Init(DEFAULT_WDOG, &wdogInit);
+
+        _wdt_init = true;
     }
 }