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authorGareth McMullin2011-02-04 22:47:51 +1300
committerGareth McMullin2011-02-04 22:47:51 +1300
commit769a932f3ec147bddbf488a88214dfb12a4eed78 (patch)
tree52cb7feea948e40f2ee2ab4da3bbd26d730b3390 /lib/lm3s
parent729a48c6557ec4ef4b0ec87f2de47010f8066ee8 (diff)
Added initial support for the LuminaryMicro LM3S family.
Diffstat (limited to 'lib/lm3s')
-rw-r--r--lib/lm3s/Makefile57
-rw-r--r--lib/lm3s/gpio.c32
-rw-r--r--lib/lm3s/libopencm3_lm3s.ld63
-rw-r--r--lib/lm3s/vector.c96
4 files changed, 248 insertions, 0 deletions
diff --git a/lib/lm3s/Makefile b/lib/lm3s/Makefile
new file mode 100644
index 0000000..7197ec3
--- /dev/null
+++ b/lib/lm3s/Makefile
@@ -0,0 +1,57 @@
+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program 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 General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program. If not, see <http://www.gnu.org/licenses/>.
+##
+
+LIBNAME = libopencm3_lm3s
+
+# PREFIX ?= arm-none-eabi
+PREFIX ?= arm-elf
+CC = $(PREFIX)-gcc
+AR = $(PREFIX)-ar
+CFLAGS = -Os -g -Wall -Wextra -I../../include -fno-common \
+ -mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
+ -ffunction-sections -fdata-sections
+# ARFLAGS = rcsv
+ARFLAGS = rcs
+OBJS = gpio.o \
+ vector.o
+
+# VPATH += ../usb
+
+# Be silent per default, but 'make V=1' will show all compiler calls.
+ifneq ($(V),1)
+Q := @
+endif
+
+all: $(LIBNAME).a
+
+$(LIBNAME).a: $(OBJS)
+ @printf " AR $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(AR) $(ARFLAGS) $@ $^
+
+%.o: %.c
+ @printf " CC $(subst $(shell pwd)/,,$(@))\n"
+ $(Q)$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+ @printf " CLEAN lib/lpc13xx\n"
+ $(Q)rm -f *.o
+ $(Q)rm -f $(LIBNAME).a
+
+.PHONY: clean
+
diff --git a/lib/lm3s/gpio.c b/lib/lm3s/gpio.c
new file mode 100644
index 0000000..34df295
--- /dev/null
+++ b/lib/lm3s/gpio.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/lm3s/gpio.h>
+
+void gpio_set(u32 gpioport, u8 gpios)
+{
+ /* ipaddr[9:2] mask the bits to be set, hence the array index */
+ GPIO_DATA(gpioport)[gpios] = 0xff;
+}
+
+void gpio_clear(u32 gpioport, u8 gpios)
+{
+ GPIO_DATA(gpioport)[gpios] = 0;
+}
+
diff --git a/lib/lm3s/libopencm3_lm3s.ld b/lib/lm3s/libopencm3_lm3s.ld
new file mode 100644
index 0000000..5871138
--- /dev/null
+++ b/lib/lm3s/libopencm3_lm3s.ld
@@ -0,0 +1,63 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Generic linker script for LM3S targets using libopencm3. */
+
+/* Memory regions must be defined in the ld script which includes this one. */
+
+/* Enforce emmition of the vector table */
+EXTERN (vector_table)
+
+/* Define sections. */
+SECTIONS
+{
+ . = ORIGIN(rom);
+
+ .text : {
+ *(.vectors) /* Vector table */
+ *(.text*) /* Program code */
+ *(.rodata*) /* Read-only data */
+ _etext = .;
+ } >rom
+
+ . = ORIGIN(ram);
+
+ .data : {
+ _data = .;
+ *(.data*) /* Read-write initialized data */
+ _edata = .;
+ } >ram AT >rom
+
+ .bss : {
+ *(.bss*) /* Read-write zero initialized data */
+ *(COMMON)
+ _ebss = .;
+ } >ram AT >rom
+
+ /*
+ * The .eh_frame section appears to be used for C++ exception handling.
+ * You may need to fix this if you're using C++.
+ */
+ /DISCARD/ : { *(.eh_frame) }
+
+ end = .;
+}
+
+PROVIDE(_stack = 0x20000800);
+
diff --git a/lib/lm3s/vector.c b/lib/lm3s/vector.c
new file mode 100644
index 0000000..995ee78
--- /dev/null
+++ b/lib/lm3s/vector.c
@@ -0,0 +1,96 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define WEAK __attribute__ ((weak))
+
+/* Symbols exported by linker script */
+extern unsigned _etext, _data, _edata, _ebss, _stack;
+
+void main(void);
+void reset_handler(void);
+void blocking_handler(void);
+void null_handler(void);
+
+void WEAK nmi_handler(void);
+void WEAK hard_fault_handler(void);
+void WEAK mem_manage_handler(void);
+void WEAK bus_fault_handler(void);
+void WEAK usage_fault_handler(void);
+void WEAK sv_call_handler(void);
+void WEAK debug_monitor_handler(void);
+void WEAK pend_sv_handler(void);
+void WEAK sys_tick_handler(void);
+
+/* TODO: Interrupt handler prototypes */
+
+__attribute__ ((section(".vectors")))
+void (*const vector_table[]) (void) = {
+ (void*)&_stack,
+ reset_handler,
+ nmi_handler,
+ hard_fault_handler,
+ mem_manage_handler,
+ bus_fault_handler,
+ usage_fault_handler,
+ 0, 0, 0, 0, /* Reserved */
+ sv_call_handler,
+ debug_monitor_handler,
+ 0, /* Reserved */
+ pend_sv_handler,
+ sys_tick_handler,
+
+ /* TODO: Interrupt handlers */
+};
+
+void reset_handler(void)
+{
+ volatile unsigned *src, *dest;
+ asm("MSR msp, %0" : : "r"(&_stack));
+
+ for (src = &_etext, dest = &_data; dest < &_edata; src++, dest++)
+ *dest = *src;
+
+ while (dest < &_ebss)
+ *dest++ = 0;
+
+ /* Call the application's entry point. */
+ main();
+}
+
+void blocking_handler(void)
+{
+ while (1) ;
+}
+
+void null_handler(void)
+{
+ /* Do nothing. */
+}
+
+#pragma weak nmi_handler = null_handler
+#pragma weak hard_fault_handler = blocking_handler
+#pragma weak mem_manage_handler = blocking_handler
+#pragma weak bus_fault_handler = blocking_handler
+#pragma weak usage_fault_handler = blocking_handler
+#pragma weak sv_call_handler = null_handler
+#pragma weak debug_monitor_handler = null_handler
+#pragma weak pend_sv_handler = null_handler
+#pragma weak sys_tick_handler = null_handler
+/* TODO: Interrupt handler weak aliases */
+