diff --git a/lib/lpc43xx/Makefile b/lib/lpc43xx/Makefile new file mode 100644 index 00000000..c29f690d --- /dev/null +++ b/lib/lpc43xx/Makefile @@ -0,0 +1,58 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## 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 . +## + +LIBNAME = libopencm3_lpc17xx + +PREFIX ?= arm-none-eabi +#PREFIX ?= arm-elf +CC = $(PREFIX)-gcc +AR = $(PREFIX)-ar +CFLAGS = -O0 -g -Wall -Wextra -I../../include -fno-common \ + -mcpu=cortex-m3 -mthumb -Wstrict-prototypes \ + -ffunction-sections -fdata-sections -MD +# ARFLAGS = rcsv +ARFLAGS = rcs +OBJS = gpio.o vector.o + +# VPATH += ../usb + +# Be silent per default, but 'make V=1' will show all compiler calls. +ifneq ($(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/lpc17xx\n" + $(Q)rm -f *.o *.d + $(Q)rm -f $(LIBNAME).a + +.PHONY: clean + +-include $(OBJS:.o=.d) + diff --git a/lib/lpc43xx/gpio.c b/lib/lpc43xx/gpio.c new file mode 100644 index 00000000..6c44081c --- /dev/null +++ b/lib/lpc43xx/gpio.c @@ -0,0 +1,30 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Uwe Hermann + * + * 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 . + */ + +#include + +void gpio_set(u32 gpioport, u32 gpios) +{ + GPIO_SET(gpioport) = gpios; +} + +void gpio_clear(u32 gpioport, u32 gpios) +{ + GPIO_CLR(gpioport) = gpios; +} diff --git a/lib/lpc43xx/libopencm3_lpc17xx.ld b/lib/lpc43xx/libopencm3_lpc17xx.ld new file mode 100644 index 00000000..30a2c0fb --- /dev/null +++ b/lib/lpc43xx/libopencm3_lpc17xx.ld @@ -0,0 +1,73 @@ + +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * 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 . + */ + +/* Generic linker script for LPC13XX 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 the entry point of the output file. */ +ENTRY(reset_handler) + +/* 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) } + + /* + * Another section used by C++ stuff, appears when using newlib with + * 64bit (long long) printf support - discard it for now. + */ + /DISCARD/ : { *(.ARM.exidx) } + + end = .; +} + +PROVIDE(_stack = ORIGIN(ram) + LENGTH(ram)); + diff --git a/lib/lpc43xx/vector.c b/lib/lpc43xx/vector.c new file mode 100644 index 00000000..016db7ab --- /dev/null +++ b/lib/lpc43xx/vector.c @@ -0,0 +1,94 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Piotr Esden-Tempski + * + * 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 . + */ + +#define WEAK __attribute__ ((weak)) + +/* Symbols exported by the linker script(s). */ +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, /* Addr: 0x0000_0000 */ + reset_handler, /* Addr: 0x0000_0004 */ + nmi_handler, /* Addr: 0x0000_0008 */ + hard_fault_handler, /* Addr: 0x0000_000C */ + mem_manage_handler, /* Addr: 0x0000_0010 */ + bus_fault_handler, /* Addr: 0x0000_0014 */ + usage_fault_handler, /* Addr: 0x0000_0018 */ + 0, 0, 0, 0, /* Reserved Addr: 0x0000_001C - 0x0000_002B */ + sv_call_handler, /* Addr: 0x0000_002C */ + debug_monitor_handler, /* Addr: 0x0000_0030 */ + 0, /* Reserved Addr: 0x0000_00034 */ + pend_sv_handler, /* Addr: 0x0000_0038 */ + sys_tick_handler, /* Addr: 0x0000_003C */ +}; + + +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 */