Windows Cygwin: Use MinTTY
Using the DOS “start” command with parameters passed to the started program
[...] :run_nios2_command_shell @ start "" "%_QUARTUS_ROOT%\bin\cygwin\bin\mintty.exe" -e /bin/bash -c '%_NIOS2EDS_ROOT%nios2_command_shell.sh %*'
[...] :run_nios2_command_shell @ REM "%_QUARTUS_BIN%\cygwin\bin\bash.exe" -c '%_NIOS2EDS_ROOT%nios2_command_shell.sh %*' @ start "" "%_QUARTUS_BIN%\cygwin\bin\mintty.exe" -e /bin/bash -c '%_NIOS2EDS_ROOT%nios2_command_shell.sh %*'
Windows Cygwin: Use Python
if [ -n "${COMSPEC}" ]; then
_IS_WINDOWS=1
PATH="/bin:/usr/bin:/cygdrive/c/Python27:${PATH}"
fi
Makefile changes (create-this-app-base.sh)
[...]
APP_ARGS=
NIOS2_APP_GEN_ARGS="$NIOS2_APP_GEN_ARGS_RELEASE"
while true; do
case "$1" in
-d|--debug)
NIOS2_APP_GEN_ARGS="$NIOS2_APP_GEN_ARGS_DEBUG"
shift
;;
-s|--silent)
APP_ARGS="$APP_ARGS --silent"
shift
;;
*)
break
;;
esac
done
. ../scripts/create-this-app-base.sh $APP_ARGS
# EOF
[...]
if [ -z "$SKIP_MAKE" ]; then
cmd="make"
if [ -n "$SILENT_MAKE" ]; then
sed 's/^$(CC)/@$(CC)/' Makefile > Makefile.new
mv Makefile.new Makefile
fi
sed 's/$(APP_CXXFLAGS) $(APP_CFLAGS)/$(APP_CXXFLAGS)/' Makefile > Makefile.new
mv Makefile.new Makefile
echo "create-this-app.sh: Running \"$cmd\""
$cmd || {
echo "make failed"
exit 1
}
[...]
fi
exit 0
# EOF
Software Build Tools (SBT) + create-this-app
$ nios2-swexample-create --list hello_world_small float2_gcc simple_socket_server float2_functionality memtest_small blank_project memtest simple_socket_server_rgmii float2_performance hello_ucosii count_binary board_diag hello_alt_main web_server hello_world web_server_rgmii $ nios2-swexample-create \ --sopc-file=../../hdl/quartus/qsys/nios.sopcinfo \ --type=hello_world
Make not found
Problems -> Errors -> Program "make" is not found in PATH
Project -> Properties -> C/C++-Build -> Tool Chain Editor -> Linux NIOS II GCC4
or
Eclipse Preferences -> C/C++ -> Build -> Environment -> Add.. -> "${PATH}:/Developer/usr/bin"
Program “make” not found in PATH
Small Driver, Reduced Device Drivers
#if defined(ALT_USE_SMALL_DRIVERS) || defined(ALTERA_AVALON_UART_SMALL)
|
Includes
/opt/altera12.1sp1/nios2eds/components/altera_nios2/HAL/inc /opt/altera12.1sp1/nios2eds/bin/gnu/H-i686-pc-linux-gnu/nios2-elf/include /opt/altera12.1sp1/nios2eds/bin/gnu/H-i686-pc-linux-gnu/lib/gcc/nios2-elf/4.1.2/include
Exception Handling
Nios II Exception Handling
alteraforum.com: Nios II exception handler
Stacktrace / Backtrace
ABachmann: Debug user space application with MMU
libc
Is malloc() and free() not thread-safe?
In addition, the MicroC/OS-II implementation provides appropriate task locking to ensure that heap accesses, i.e., calls to malloc() and free() are also thread safe.
GCC
$ nios2-elf-gcc -v gcc version 4.1.2 (Altera 12.1sp1 Build 243) $ nios2-elf-gcc -v gcc version 4.7.3 (Altera 13.1 Build 162) $ nios2-elf-gcc -v gcc version 4.8.3 20140320 (prerelease) (Altera 14.1 Build 186)
Embedded News and Events: Nios II Gen2 Processor Support
Nios II GNU toolchain upgrade from GCC 4.1.2 to GCC 4.7.3
Can the linker inline functions?
rand()
Generate a random number between 'x' and 'y': return [ x + random % (y - x + 1) } ex. x = 2, y = 7 random % (7 - 2 + 1) = random % 6 = 0 ... 5 2 + random % 6 = 2 ... 7
random number generator?
ucore-nios2/libs/rand.c
How to choose numbers random with C?
GDB
Place a .gdbinit in your app-directory
How to use GDB to find what function a memory address corresponds to
GDB: Getting a symbol name from a memory address
bt #0 alt_irq_entry () at HAL/src/alt_exception_entry.S:117 #1 0x00000024 in alt_irq_entry () at HAL/src/alt_exception_entry.S:107 Backtrace stopped: previous frame identical to this frame (corrupt stack?)
info symbol 0x1201c sys_check_timeouts + 164 in section .text
list *0x1201c
0x1201c is in sys_check_timeouts (src/lwip-1.4.1/core/timers.c:374).
369 /* this cares for wraparounds */
370 diff = now - timeouts_last_time;
371 do
372 {
373 #if PBUF_POOL_FREE_OOSEQ
374 PBUF_CHECK_FREE_OOSEQ();
375 #endif /* PBUF_POOL_FREE_OOSEQ */
376 had_one = 0;
377 tmptimeout = next_timeout;
378 if (tmptimeout && (tmptimeout->time <= diff)) {
readelf
Dive into ELF files using readelf command
what are the meanings of the columns displayed by readelf?
objdump
Understanding ELF using readelf and objdump
How to get gcc to interleave assembly output with original source code
$ nios2-elf-objdump -d -j <section> <filename> | grep -C <context> <address> $ nios2-elf-objdump -d -j .text hcpp.elf | grep -C 30 1201c
PRIxPTR and intptr_t
Info: Compiling src/test.c to obj/default/src/test.o
src/test.c: In function 'task_test':
src/test.c:642:9: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 2 has type 'unsigned int' [-Wformat=]
src/test.c:642:9: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=]
LOG_PRINTLN(LOG_TEST, LOG_VERBOSE, ("lut_entry = 0x%08" PRIxPTR " idx_table = 0x%08" PRIxPTR, (uintptr_t) lut_table, (uintptr_t) idx_tabl));
inttypes.h bug leads to inconsistent warnings cross platform
Remove build-in Include Path
|
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Eclipse CDT Invalid Project Path
Eclipse BSP-Project uses Nios II extensions
<nature>com.altera.sbtgui.project.SBTGUIBspNature</nature>
<?xml version="1.0" encoding="UTF-8"?> <projectDescription> <name>hcpp_bsp</name> <comment></comment> <projects> </projects> <buildSpec> <buildCommand> <name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name> <triggers>clean,full,incremental,</triggers> <arguments> </arguments> </buildCommand> <buildCommand> <name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name> <triggers>full,incremental,</triggers> <arguments> </arguments> </buildCommand> </buildSpec> <natures> <nature>org.eclipse.cdt.core.cnature</nature> <nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature> <nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature> <nature>org.eclipse.cdt.core.ccnature</nature> <nature>com.altera.sbtgui.project.SBTGUINature</nature> <nature>com.altera.sbtgui.project.SBTGUICustomAppNature</nature> <nature>com.altera.sbtgui.project.SBTGUIBspNature</nature> </natures> </projectDescription>
Use Folding / Expand / Collapse
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How to collapse blocks of code in Eclipse?
Is there a way to collapse all code blocks in Eclipse?
JTAG on Linux
$ jtagconfig 1) USB-Blaster variant [6-2] Unable to lock chain - Insufficient port permissions
Altera USB-Blaster with Ubuntu 14.04
# For Altera USB-Blaster permissions.
SUBSYSTEM=="usb",\
ENV{DEVTYPE}=="usb_device",\
ATTR{idVendor}=="09fb",\
ATTR{idProduct}=="6010",\
MODE="0666",\
NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}",\
RUN+="/bin/chmod 0666 %c"
$ sudo udevadm control --reload
$ jtagd --foreground --debug JTAG daemon started Using config file /etc/jtagd/jtagd.conf Remote JTAG permitted when password set No USB device change detection because libudev.so.0 not found USB-Blaster port (/dev/bus/usb/006/002) open failed (13) USB-Blaster added "USB-Blaster variant [6-2]"
Ubuntu 13.04 (64 bit) won’t launch Brackets, libudev.so.0
The solution of lacking libudev.so.0
$ sudo ln -s /lib/x86_64-linux-gnu/libudev.so.1 /lib/x86_64-linux-gnu/libudev.so.0
Un-plug and re-plug the USB Blaster!!!
$ jtagd --foreground --debug JTAG daemon started Using config file /etc/jtagd/jtagd.conf Remote JTAG permitted when password set USB-Blaster "USB-Blaster" firmware version 4.00 USB-Blaster endpoints out=02(64), in=81(64); urb size=1024 USB-Blaster added "USB-Blaster [6-2]"
$ sudo killall -9 jtagd $ jtagconfig 1) USB-Blaster [6-2] 020F70DD EP3C120/EP4CE115
Reset NIOS by software
Can I perform a software reset on a Nios II embedded processor?
NIOS2_WRITE_STATUS(0);
NIOS2_WRITE_IENABLE(0);
((void (*) (void)) NIOS2_RESET_ADDR) ();