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authorAlexandru Gagniuc2012-11-22 12:05:33 -0600
committerAlexandru Gagniuc2012-12-31 01:35:27 -0600
commitc02fba51a47a68aea3233608f8d127520a1eefec (patch)
tree2e4e629b676eee66ab61e7546afc59313f9f5165
parent326c945b55d6dd1cf153c6ca8715685a968b1384 (diff)
lm4f: Add exammple for Stellaris Launchpad board
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
-rw-r--r--examples/lm4f/Makefile.include134
-rw-r--r--examples/lm4f/stellaris-ek-lm4f120xl/ek-lm4f120xl.ld31
-rw-r--r--examples/lm4f/stellaris-ek-lm4f120xl/miniblink/Makefile25
-rw-r--r--examples/lm4f/stellaris-ek-lm4f120xl/miniblink/README9
-rw-r--r--examples/lm4f/stellaris-ek-lm4f120xl/miniblink/miniblink.c93
5 files changed, 292 insertions, 0 deletions
diff --git a/examples/lm4f/Makefile.include b/examples/lm4f/Makefile.include
new file mode 100644
index 0000000..332d24b
--- /dev/null
+++ b/examples/lm4f/Makefile.include
@@ -0,0 +1,134 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
+## Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+PREFIX ?= arm-none-eabi
+#PREFIX ?= arm-elf
+CC = $(PREFIX)-gcc
+LD = $(PREFIX)-gcc
+OBJCOPY = $(PREFIX)-objcopy
+OBJDUMP = $(PREFIX)-objdump
+
+TOOLCHAIN_DIR ?= ../../../..
+ifeq ($(wildcard ../../../../lib/libopencm3_lm4f.a),)
+ifneq ($(strip $(shell which $(CC))),)
+TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
+endif
+else
+ifeq ($(V),1)
+$(info We seem to be building the example in the source directory. Using local library!)
+endif
+endif
+
+CFLAGS += -O0 -g3 -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
+ -mcpu=cortex-m3 -mthumb -MD -DLM3S
+LDSCRIPT ?= $(BINARY).ld
+LDFLAGS += -L$(TOOLCHAIN_DIR)/lib \
+ -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections
+OBJS += $(BINARY).o
+
+OOCD ?= openocd
+OOCD_INTERFACE ?= flossjtag
+OOCD_BOARD ?= olimex_stm32_h103
+# FIXME
+
+# Be silent per default, but 'make V=1' will show all compiler calls.
+ifneq ($(V),1)
+Q := @
+NULL := 2>/dev/null
+else
+LDFLAGS += -Wl,--print-gc-sections
+endif
+
+.SUFFIXES: .elf .bin .hex .srec .list .images
+.SECONDEXPANSION:
+.SECONDARY:
+
+all: images
+
+images: $(BINARY).images
+flash: $(BINARY).flash
+
+%.images: %.bin %.hex %.srec %.list
+ @#echo "*** $* images generated ***"
+
+%.bin: %.elf
+ @#printf " OBJCOPY $(*).bin\n"
+ $(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin
+
+%.hex: %.elf
+ @#printf " OBJCOPY $(*).hex\n"
+ $(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex
+
+%.srec: %.elf
+ @#printf " OBJCOPY $(*).srec\n"
+ $(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec
+
+%.list: %.elf
+ @#printf " OBJDUMP $(*).list\n"
+ $(Q)$(OBJDUMP) -S $(*).elf > $(*).list
+
+%.elf: $(OBJS) $(LDSCRIPT) $(TOOLCHAIN_DIR)/lib/libopencm3_lm3s.a
+ @#printf " LD $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(LD) $(LDFLAGS) -o $(*).elf $(OBJS) -lopencm3_lm3s
+
+%.o: %.c Makefile
+ @#printf " CC $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+ $(Q)rm -f *.o
+ $(Q)rm -f *.d
+ $(Q)rm -f *.elf
+ $(Q)rm -f *.bin
+ $(Q)rm -f *.hex
+ $(Q)rm -f *.srec
+ $(Q)rm -f *.list
+
+# FIXME: Replace STM32 stuff with proper LPC13XX OpenOCD support later.
+ifeq ($(OOCD_SERIAL),)
+%.flash: %.hex
+ @printf " FLASH $<\n"
+ @# IMPORTANT: Don't use "resume", only "reset" will work correctly!
+ $(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
+ -f board/$(OOCD_BOARD).cfg \
+ -c "init" -c "reset init" \
+ -c "stm32x mass_erase 0" \
+ -c "flash write_image $(*).hex" \
+ -c "reset" \
+ -c "shutdown" $(NULL)
+else
+%.flash: %.hex
+ @printf " FLASH $<\n"
+ @# IMPORTANT: Don't use "resume", only "reset" will work correctly!
+ $(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
+ -f board/$(OOCD_BOARD).cfg \
+ -c "ft2232_serial $(OOCD_SERIAL)" \
+ -c "init" -c "reset init" \
+ -c "stm32x mass_erase 0" \
+ -c "flash write_image $(*).hex" \
+ -c "reset" \
+ -c "shutdown" $(NULL)
+endif
+
+.PHONY: images clean
+
+-include $(OBJS:.o=.d)
+
diff --git a/examples/lm4f/stellaris-ek-lm4f120xl/ek-lm4f120xl.ld b/examples/lm4f/stellaris-ek-lm4f120xl/ek-lm4f120xl.ld
new file mode 100644
index 0000000..8a096fa
--- /dev/null
+++ b/examples/lm4f/stellaris-ek-lm4f120xl/ek-lm4f120xl.ld
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Linker script for TI Stellaris EX-LM4F120XL evaluation board. */
+
+/* Define memory regions. */
+MEMORY
+{
+ rom (rx) : ORIGIN = 0x00000000, LENGTH = 256K
+ ram (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_lm4f.ld
+
diff --git a/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/Makefile b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/Makefile
new file mode 100644
index 0000000..9a014a7
--- /dev/null
+++ b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/Makefile
@@ -0,0 +1,25 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+##
+## This library is free software: you can redistribute it and/or modify
+## it under the terms of the GNU Lesser General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This library is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public License
+## along with this library. If not, see <http://www.gnu.org/licenses/>.
+##
+
+BINARY = miniblink
+
+LDSCRIPT = ../ek-lm4f120xl.ld
+
+include ../../Makefile.include
+
diff --git a/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/README b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/README
new file mode 100644
index 0000000..f6441be
--- /dev/null
+++ b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/README
@@ -0,0 +1,9 @@
+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+Flashes the Red, Green and Blue diodes on the board, in order.
+RED controlled by PF1
+Green controlled by PF3
+Blue controlled by PF2
+
diff --git a/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/miniblink.c b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/miniblink.c
new file mode 100644
index 0000000..e5ebb5c
--- /dev/null
+++ b/examples/lm4f/stellaris-ek-lm4f120xl/miniblink/miniblink.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
+ * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \addtogroup Examples
+ *
+ * Flashes the Red, Green and Blue diodes on the board, in order.
+ *
+ * RED controlled by PF1
+ * Green controlled by PF3
+ * Blue controlled by PF2
+ */
+
+#include <libopencm3/lm4f/systemcontrol.h>
+#include <libopencm3/lm4f/gpio.h>
+
+void gpio_setup(void)
+{
+ SYSTEMCONTROL_RCGC2 |= 0x20; /* Enable GPIOF in run mode. */
+ const u32 outpins = ((1<<3) | (1<<2) | (1<<1));
+
+ GPIO_DIR(GPIOF) |= outpins; /* Configure outputs. */
+ GPIO_DEN(GPIOF) |= outpins; /* Enable digital function on outputs. */
+}
+
+#define FLASH_DELAY 800000
+int main(void)
+{
+ int i;
+
+ gpio_setup();
+
+ /* Blink STATUS LED (PF0) on the board. */
+ while (1) {
+ /*
+ * Flash the Red diode
+ */
+ gpio_set(GPIOF, GPIO1);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ gpio_clear(GPIOF, GPIO1);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ /*
+ * Flash the Green diode
+ */
+ gpio_set(GPIOF, GPIO3);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ gpio_clear(GPIOF, GPIO3);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ /*
+ * Flash the Blue diode
+ */
+ gpio_set(GPIOF, GPIO2);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+
+ gpio_clear(GPIOF, GPIO2);
+
+ for (i = 0; i < FLASH_DELAY; i++) /* Wait a bit. */
+ __asm__("nop");
+ }
+
+ return 0;
+}