I realize this is an unsupported platform.Hello
Background Info:I'm currently playing with ChibiOS/RT 3.1.2 on the LPCXpresso 1347 board.
I added support for the LPC1347 MCU according to the project standards. The relevant files added to the OS can be found here
Problem:Upon executing the last instruction in the assembly routine
_port_switch, the core ends up in a
HardFault_Handler as the SP gets loaded with zeros.
Code: Select all
_port_switch:
00000190: stmdb sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
00000194: str.w sp, [r1, #12]
00000198: ldr r3, [r0, #12] ;<<< *(R0+12) contains 0x00000000
0000019a: mov sp, r3 ;<<< SP is set to 0, beginning of the end
0000019c: ldmia.w sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc} ;<<< Hard Fault
Here's the stack trace that leads to this
_port_switch call:
(There are
_port_switch calls before this one that don't fail - e.g. from
chThdCreateStatic)
Code: Select all
_port_switch() at 0x19a
chSchGoSleepS() at chschd.c:269 0xa90
chSchGoSleepTimeoutS() at chschd.c:338 0xb52
chThdSleepS() at chthreads.h:268 0xdfa
chThdSleep() at chthreads.c:314 0xfb0
Thread1() at main.c:9 0x13a4
_port_thread_start() at 0x1b2
Here's main:
► Show Spoiler
Code: Select all
#include "ch.h"
static THD_WORKING_AREA(waThread1, 128);
static THD_FUNCTION(Thread1, arg) {
(void)arg;
chRegSetThreadName("blinker");
while (true) {
chThdSleepMilliseconds(500);
}
}
int main(void) {
chSysInit();
chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
while (true) {
chThdSleepMilliseconds(500);
}
}
Here's the Makefile:
► Show Spoiler
Code: Select all
##############################################################################
# Build global options
# NOTE: Can be overridden externally.
#
# Compiler options here.
ifeq ($(USE_OPT),)
USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
endif
# C specific options here (added to USE_OPT).
ifeq ($(USE_COPT),)
USE_COPT = #-std=c11
endif
# C++ specific options here (added to USE_OPT).
ifeq ($(USE_CPPOPT),)
USE_CPPOPT = -fno-rtti -fno-exceptions
endif
# Enable this if you want the linker to remove unused code and data
ifeq ($(USE_LINK_GC),)
USE_LINK_GC = yes
endif
# Linker extra options here.
ifeq ($(USE_LDOPT),)
USE_LDOPT = "-l:liblpc_chip_13xx.a"
endif
# Enable this if you want link time optimizations (LTO)
ifeq ($(USE_LTO),)
USE_LTO = no
endif
# If enabled, this option allows to compile the application in THUMB mode.
ifeq ($(USE_THUMB),)
USE_THUMB = yes
endif
# Enable this if you want to see the full log while compiling.
ifeq ($(USE_VERBOSE_COMPILE),)
USE_VERBOSE_COMPILE = yes
endif
# If enabled, this option makes the build process faster by not compiling
# modules not used in the current configuration.
ifeq ($(USE_SMART_BUILD),)
USE_SMART_BUILD = yes
endif
#
# Build global options
##############################################################################
##############################################################################
# Architecture or project specific options
#
# Stack size to be allocated to the Cortex-M process stack. This stack is
# the stack used by the main() thread.
ifeq ($(USE_PROCESS_STACKSIZE),)
USE_PROCESS_STACKSIZE = 0x400
endif
# Stack size to the allocated to the Cortex-M main/exceptions stack. This
# stack is used for processing interrupts and exceptions.
ifeq ($(USE_EXCEPTIONS_STACKSIZE),)
USE_EXCEPTIONS_STACKSIZE = 0x400
endif
# Enables the use of FPU on Cortex-M4 (no, softfp, hard).
ifeq ($(USE_FPU),)
USE_FPU = no
endif
#
# Architecture or project specific options
##############################################################################
##############################################################################
# Project, sources and paths
#
# Define project name here
PROJECT = Lateral
# Imported source files and paths
CHIBIOS = /home/dzarda/Sync/chibios
# Startup files.
include $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC/mk/startup_lpc1347.mk
# HAL-OSAL files (optional).
include $(CHIBIOS)/os/hal/hal.mk
include $(CHIBIOS)/os/hal/ports/LPC/LPC134x/platform.mk
include $(CHIBIOS)/os/hal/osal/rt/osal.mk
include $(shell pwd)/board/board.mk
# RTOS files (optional).
include $(CHIBIOS)/os/rt/rt.mk
include $(CHIBIOS)/os/rt/ports/ARMCMx/compilers/GCC/mk/port_v7m.mk
# Other files (optional).
include $(CHIBIOS)/test/rt/test.mk
# Define linker script file here
LDSCRIPT= $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC/ld/LPC1347.ld
# C sources that can be compiled in ARM or THUMB mode depending on the global
# setting.
CSRC = sys/handlers.c \
$(STARTUPSRC) \
$(KERNSRC) \
$(PORTSRC) \
$(OSALSRC) \
$(HALSRC) \
$(PLATFORMSRC) \
$(BOARDSRC) \
$(TESTSRC) \
main.c
# C++ sources that can be compiled in ARM or THUMB mode depending on the global
# setting.
CPPSRC =
# C sources to be compiled in ARM mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
# option that results in lower performance and larger code size.
ACSRC =
# C++ sources to be compiled in ARM mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
# option that results in lower performance and larger code size.
ACPPSRC =
# C sources to be compiled in THUMB mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
# option that results in lower performance and larger code size.
TCSRC =
# C sources to be compiled in THUMB mode regardless of the global setting.
# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler
# option that results in lower performance and larger code size.
TCPPSRC =
# List ASM source files here
ASMSRC = $(STARTUPASM) $(PORTASM) $(OSALASM)
INCDIR = $(STARTUPINC) $(KERNINC) $(PORTINC) $(OSALINC) \
$(HALINC) $(PLATFORMINC) $(BOARDINC) $(TESTINC) \
$(CHIBIOS)/os/various \
sys
#
# Project, sources and paths
##############################################################################
##############################################################################
# Compiler settings
#
MCU = cortex-m3
#TRGT = arm-elf-
TRGT = arm-none-eabi-
CC = $(TRGT)gcc
CPPC = $(TRGT)g++
# Enable loading with g++ only if you need C++ runtime support.
# NOTE: You can use C++ even without C++ support if you are careful. C++
# runtime support makes code size explode.
LD = $(TRGT)gcc
#LD = $(TRGT)g++
CP = $(TRGT)objcopy
AS = $(TRGT)gcc -x assembler-with-cpp
AR = $(TRGT)ar
OD = $(TRGT)objdump
SZ = $(TRGT)size
HEX = $(CP) -O ihex
BIN = $(CP) -O binary
# ARM-specific options here
AOPT =
# THUMB-specific options here
TOPT = -mthumb -DTHUMB
# Define C warning options here
CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
# Define C++ warning options here
CPPWARN = -Wall -Wextra -Wundef
#
# Compiler settings
##############################################################################
##############################################################################
# Start of user section
#
# List all user C define here, like -D_DEBUG=1
UDEFS = -DLPC1347
# Define ASM defines here
UADEFS =
# List all user directories here
UINCDIR =
# List the user directory to look for the libraries here
ULIBDIR =
# List all user libraries here
ULIBS =
#
# End of user defines
##############################################################################
RULESPATH = $(CHIBIOS)/os/common/ports/ARMCMx/compilers/GCC
include $(RULESPATH)/rules.mk
##############################################################################
# MISRA check rule, requires PCLint and the setup files, not provided.
#
misra:
@lint-nt -v -w3 $(DEFS) pclint/co-gcc.lnt pclint/au-misra3.lnt pclint/waivers.lnt $(IINCDIR) $(CSRC) &> misra.txt
I'd be happy for any pointers to what am I doing wrong.