Build with libopencm3 as a submodule.

Fix incompatibilities with latest libopencm3.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libopencm3"]
+	path = libopencm3
+	url = git@github.com:libopencm3/libopencm3.git

libopencm3

@@ -0,0 +1 @@
+Subproject commit 4e4496f70d00fe24b2c5d594d6500f537eeb6478

src/platforms/native/Makefile.inc

@@ -2,10 +2,12 @@ CROSS_COMPILE ?= arm-none-eabi-
 CC = $(CROSS_COMPILE)gcc
 OBJCOPY = $(CROSS_COMPILE)objcopy
 
-CFLAGS += -Istm32/include -mcpu=cortex-m3 -mthumb -DSTM32F1
+CFLAGS += -Istm32/include -mcpu=cortex-m3 -mthumb \
+	-DSTM32F1 -I../libopencm3/include
 LDFLAGS_BOOT = -lopencm3_stm32f1 -Wl,--defsym,_stack=0x20005000 \
 	-Wl,-T,platforms/stm32/blackmagic.ld -nostartfiles -lc -lnosys \
-	-Wl,-Map=mapfile -mthumb -mcpu=cortex-m3 -Wl,-gc-sections
+	-Wl,-Map=mapfile -mthumb -mcpu=cortex-m3 -Wl,-gc-sections \
+	-L../libopencm3/lib
 LDFLAGS = $(LDFLAGS_BOOT) -Wl,-Ttext=0x8002000
 
 VPATH += platforms/stm32

src/platforms/native/platform.c

@@ -228,12 +228,11 @@ static void adc_init(void)
 	adc_off(ADC1);
 	adc_disable_scan_mode(ADC1);
 	adc_set_single_conversion_mode(ADC1);
-	adc_enable_discontinous_mode_regular(ADC1);
 	adc_disable_external_trigger_regular(ADC1);
 	adc_set_right_aligned(ADC1);
 	adc_set_conversion_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
 
-	adc_on(ADC1);
+	adc_power_on(ADC1);
 
 	/* Wait for ADC starting up. */
 	for (int i = 0; i < 800000; i++)    /* Wait a bit. */

src/platforms/stlink/Makefile.inc

@@ -2,10 +2,12 @@ CROSS_COMPILE ?= arm-none-eabi-
 CC = $(CROSS_COMPILE)gcc
 OBJCOPY = $(CROSS_COMPILE)objcopy
 
-CFLAGS += -mcpu=cortex-m3 -mthumb -DSTM32F1
+CFLAGS += -mcpu=cortex-m3 -mthumb \
+	-DSTM32F1 -I../libopencm3/include
 LDFLAGS = -lopencm3_stm32f1 -Wl,--defsym,_stack=0x20005000 \
 	-Wl,-T,platforms/stm32/blackmagic.ld -nostartfiles -lc -lnosys \
-	-Wl,-Map=mapfile -mthumb -mcpu=cortex-m3 -Wl,-gc-sections
+	-Wl,-Map=mapfile -mthumb -mcpu=cortex-m3 -Wl,-gc-sections \
+	-L../libopencm3/lib
 
 VPATH += platforms/stm32