From be287b9df1c170e318ea3ef08ed387944e09022b Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 30 Jun 2019 18:48:58 +0200
Subject: [PATCH] Added libopencm3 test

---
 test-opencm3/Makefile | 78 +++++++++++++++++++++++++++++++++++++++++++
 test-opencm3/test.c   | 59 ++++++++++++++++++++++++++++++++
 2 files changed, 137 insertions(+)
 create mode 100644 test-opencm3/Makefile
 create mode 100644 test-opencm3/test.c

diff --git a/test-opencm3/Makefile b/test-opencm3/Makefile
new file mode 100644
index 0000000..11acf15
--- /dev/null
+++ b/test-opencm3/Makefile
@@ -0,0 +1,78 @@
+BINARY=test
+OBJS=test.o
+
+OPENCM3_DIR=/home/mj/stm/libopencm3
+DEVICE=stm32f103x8
+
+all: $(BINARY).elf $(BINARY).bin
+
+flash: all
+	../bin/st-flash write $(BINARY).bin 0x8000000
+
+ifneq ($(V),1)
+Q		:= @
+NULL		:= 2>/dev/null
+endif
+
+include $(OPENCM3_DIR)/mk/genlink-config.mk
+
+PREFIX		?= arm-none-eabi
+
+CC		:= $(PREFIX)-gcc
+CXX		:= $(PREFIX)-g++
+LD		:= $(PREFIX)-gcc
+AR		:= $(PREFIX)-ar
+AS		:= $(PREFIX)-as
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB		:= $(PREFIX)-gdb
+OPT		:= -Os
+DEBUG		:= -ggdb3
+CSTD		?= -std=c99
+
+TGT_CFLAGS	+= $(OPT) $(CSTD) $(DEBUG)
+TGT_CFLAGS	+= $(ARCH_FLAGS)
+TGT_CFLAGS	+= -Wall -Wextra -Wshadow -Wimplicit-function-declaration
+TGT_CFLAGS	+= -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
+TGT_CFLAGS	+= -fno-common -ffunction-sections -fdata-sections
+
+TGT_CPPFLAGS	+= -MD
+
+TGT_LDFLAGS	+= --static -nostartfiles
+TGT_LDFLAGS	+= -T$(LDSCRIPT)
+TGT_LDFLAGS	+= $(ARCH_FLAGS) $(DEBUG)
+TGT_LDFLAGS	+= -Wl,-Map=$(*).map -Wl,--cref
+TGT_LDFLAGS	+= -Wl,--gc-sections
+ifeq ($(V),99)
+TGT_LDFLAGS	+= -Wl,--print-gc-sections
+endif
+
+LDLIBS		+= -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
+
+include $(OPENCM3_DIR)/mk/genlink-rules.mk
+
+%.bin: %.elf
+	@printf "  OBJCOPY $(*).bin\n"
+	$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin
+
+%.elf: $(OBJS) $(LDSCRIPT)
+	@printf "  LD      $(*).elf\n"
+	$(Q)$(LD) $(TGT_LDFLAGS) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $*.elf
+
+%.o: %.c
+	@printf "  CC      $(*).c\n"
+	$(Q)$(CC) $(TGT_CFLAGS) $(CFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $*.o -c $*.c
+
+.PHONY: clean
+clean:
+	@printf "  CLEAN\n"
+	$(Q)rm -f *.elf *.bin *.o *.d *.map $(LDSCRIPT)
+
+%.stlink-flash: %.bin
+	@printf "  FLASH  $<\n"
+	$(STFLASH) write $(*).bin 0x8000000
+
+.SECONDEXPANSION:
+.SECONDARY:
+
+-include $(OBJS:.o=.d)
diff --git a/test-opencm3/test.c b/test-opencm3/test.c
new file mode 100644
index 0000000..a38394c
--- /dev/null
+++ b/test-opencm3/test.c
@@ -0,0 +1,59 @@
+#include <stdint.h>
+
+#include <libopencm3/cm3/nvic.h>
+#include <libopencm3/cm3/systick.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+typedef uint8_t byte;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef unsigned int uint;
+
+static void clock_setup(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	rcc_periph_clock_enable(RCC_GPIOC);
+}
+
+static void gpio_setup(void)
+{
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+}
+
+static volatile u32 ms_ticks;
+
+void sys_tick_handler(void)
+{
+	ms_ticks++;
+}
+
+static void tick_setup(void)
+{
+	systick_set_frequency(1000, 72000000);
+	systick_counter_enable();
+	systick_interrupt_enable();
+}
+
+static void delay_ms(uint ms)
+{
+	u32 start_ticks = ms_ticks;
+	while (ms_ticks - start_ticks < ms)
+		;
+}
+
+int main(void)
+{
+	clock_setup();
+	gpio_setup();
+	tick_setup();
+
+	/* Blink the LED (PC13) on the board. */
+	for (;;) {
+		gpio_toggle(GPIOC, GPIO13);	/* LED on/off */
+		delay_ms(1000);
+	}
+
+	return 0;
+}
-- 
2.39.2