I am using ReadFile to read a null character '0x00', but it is not able to see it.
If I send "0x01 0x02 0x00 0x03" to my program. It will receive "0x01 0x02 0x03". I know for a fact that my sending side is sending the null character (I used a scope to see the data).
I have checked the DCB structure and have fNull set to false. (which is supposed to allow for null bytes to be received and not discarded)
This is the configuration of the DCB shown from GetCommState:
DCBlength 28
BaudRate 9600
fBinary 1
fParity 0
fOutxCtsFlow 0
fOutxDsrFlow 0
fDtrControl 0
fDsrSensitivity 0
fTXContinueOnXoff 0
fOutX 1
fInX 1
fErrorChar 0
fNull 0
fRtsControl 0
fAbortOnError 0
fDummy2 0
wReserved 0
XonLim 2048
XoffLim 512
ByteSize 7
Parity 0
StopBits 2
XonChar 0 '\0'
XoffChar 0 '\0'
ErrorChar 0 '\0'
EofChar 0 '\0'
EvtChar 0 '\0'
wReserved1 0
Am I missing something in the structure that might be blocking the null character as well? or is it possible it's a driver configuration or registry configuration that I need to change?
You have XON/XOFF flow control enabled and have specified null as the XON/XOFF characters. That is why you are not seeing null data bytes. You need to set the fOutX and fInX fields to 0 instead of 1.
Related
I'm running uClinux on a SmartFusion2 as part of a University team building a small cube satellite. However, I'm not super experienced in Linux kernel, and this issue has had me stumped for a few days. I'm trying to get the SmartFusion to run a program on bootup. Currently, the only .uImage that does this is the test 'hello' file. I'm trying to recreate the process for another program, but am running into some difficulties.
in my hello directory I have the following files: hello.busybox, hello.kernel.M2S, help.txt, hello.uImage, Makefile, hello.initramfs, hello (directory)
in the hello subdirectory (projects/hello/hello):
hello (executable), hello.c, hello.gdb, hello.h, hello.o, Makefile
to try and get the uImage to boot and run a different program, I made a copy of my projects/hello/hello directory and renamed it 'goodbye', with a few minor changes int the .h and .c files for testing purposes. Now I'm trying to get the executable 'hello' in projects/hello/goodbye to run on boot.
My initramfs file originally looked like this:
# This is a very simple, default initramfs
dir /dev 0755 0 0
nod /dev/console 0600 0 0 c 5 1
nod /dev/tty 0666 0 0 c 5 0
nod /dev/null 0600 0 0 c 1 3
nod /dev/mem 0600 0 0 c 1 1
nod /dev/kmem 0600 0 0 c 1 2
nod /dev/zero 0600 0 0 c 1 5
nod /dev/random 0600 0 0 c 1 8
nod /dev/urandom 0600 0 0 c 1 9
dir /dev/pts 0755 0 0
nod /dev/ptmx 0666 0 0 c 5 2
nod /dev/ttyS0 0666 0 0 c 4 64
nod /dev/ttyS1 0666 0 0 c 4 65
nod /dev/ttyS2 0666 0 0 c 4 66
nod /dev/ttyS3 0666 0 0 c 4 67
nod /dev/ttyS4 0666 0 0 c 4 68
nod /dev/ttyS5 0666 0 0 c 4 69
dir /bin 755 0 0
dir /proc 755 0 0
file /bin/hello ${INSTALL_ROOT}/projects/${SAMPLE}/hello/hello 755 0 0
slink /bin/init hello 777 0 0
I changed the last two lines of the initramfs to read as follows:
file /bin/hello ${INSTALL_ROOT}/projects/${SAMPLE}/hello/goodbye 755 0 0
slink /bin/init hello 777 0 0
But when I try and boot the SmartFusion2 after remaking the uImage, I get this, witht the error at the bottom:
Starting kernel ...
Linux version 2.6.33-arm1 (ecenstudent#EE10308) (gcc version 4.4.1 (Sourcery G++ Lite 2010q1-189) ) #38 Thu May 25 09:09:08 MDT 2017
CPU: ARMv7-M Processor [412fc231] revision 1 (ARMv7M)
CPU: NO data cache, 8K instruction cache
Machine: Microsemi M2S
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256
Kernel command line: m2s_platform=m2s-fg484-som console=ttyS0,115200 panic=10 ip=10.2.118.102:10.2.118.101:192.168.0.1::m2s-fg484-som:eth0:off ethaddr=3C:FB:96:05:00:53
PID hash table entries: 256 (order: -2, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 64408k/64408k available, 1128k reserved, 0K highmem
Virtual kernel memory layout:
vector : 0x00000000 - 0x00001000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
vmalloc : 0x00000000 - 0xffffffff (4095 MB)
lowmem : 0xa0000000 - 0xa4000000 ( 64 MB)
modules : 0xa0000000 - 0x01000000 (1552 MB)
.init : 0xa0008000 - 0xa0012000 ( 40 kB)
.text : 0xa0074bc0 - 0xa0083000 ( 58 kB)
.data : 0xa0084000 - 0xa008cce0 ( 36 kB)
Hierarchical RCU implementation.
NR_IRQS:83
Calibrating delay loop... 132.30 BogoMIPS (lpj=661504)
Mount-cache hash table entries: 512
Switching to clocksource mss_timer2
Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
serial8250.0: ttyS0 at MMIO 0x40000000 (irq = 10) is a 16550A
console [ttyS0] enabled
serial8250.1: ttyS1 at MMIO 0x40010000 (irq = 11) is a 16550A
Freeing init memory: 40K
Kernel panic - not syncing: No init found. Try passing init= option to kernel.
Backtrace: no frame pointer
Rebooting in 10 seconds..
Can somebody help explain why this is happening and what I need to do to my initramfs to make it run the proper program on boot? Thanks!!
As it turns out, I was confused about how those two lines worked. When I finally figured it out, they looked like this:
file /bin/hello ${INSTALL_ROOT}/projects/${SAMPLE}/goodbye/hello 755 0 0
slink /bin/init hello 777 0 0
then it worked as desired, and I was able to implement it into other uImages.
Basically, I am using qhull for some simple c++ implementations
dhcp-18-189-48-131:qhull-2012.1_2$ cat sample_input.txt
3 #
4
1 0 0
0 1 0
0 0 1
0 0 0
dhcp-18-189-48-131:qhull-2012.1_2$ qhull sample_input.txt
QH7036 qhull warning: missing space after flag s(73); reserved for menu. Skipped.
However, my programmes hangs with such error.... Could anyone help? Thank you.
I resolve it by doing
$ qhull < sample_input.txt
instead...
I have had problems with this programming board. It is set up correctly seems to be an AVRISP MKII.
I received the following error messages upon flashing with avrdude:
(trusty)chandran#localhost:~$ avrdude -c avrispmkii -p t85 -vv
avrdude: Version 6.0.1, compiled on Oct 21 2013 at 15:55:32
Copyright (c) 2000-2005 Brian Dean, h ttp://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch
System wide configuration file is "/etc/avrdude.conf"
User configuration file is "/home/chandran/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : usb
Using Programmer : avrispmkii
avrdude: usb_open(): cannot read serial number "error sending control
message: Connection timed out"
avrdude: usbdev_open(): Found AVRISP mkII, serno: [unknown]
avrdude: usbdev_recv_frame(): usb_bulk_read(): error submitting URB: No
such file or directory
avrdude: stk500v2_recv_mk2: error in USB receive
avrdude: usbdev_recv_frame(): usb_bulk_read(): error submitting URB: No such file or directory
avrdude: stk500v2_recv_mk2: error in USB receive
avrdude: stk500v2_getsync(): timeout communicating with programmer
AVR Part : ATtiny85
Chip Erase delay : 4500 us
PAGEL : P00
BS2 : P00
RESET disposition : possible i/o
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 6 4 0 no 512 4 0 4000 4500 0xff 0xff
flash 65 6 32 0 yes 8192 64 128 4500 4500 0xff 0xff
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 2 0 0 0 0 0x00 0x00
Programmer Type : STK500V2
Description : Atmel AVR ISP mkII
Programmer Model: AVRISP mkII
avrdude: usbdev_recv_frame(): usb_bulk_read(): error submitting URB: No such file or directory
It is hard to identify the issue since my version of the programming board doesn't have such great documentation.
Thanks in advance!
This bug was causing the problems. I simply reverted to the previous version of avrdude (5.11.1) and it worked. By now there is an even newer version of avrdude (6.3), this bug might no longer be a problem in latest version.
Here are some steps:
Revert to an older version of avrdude either by using sudo apt-get install <package-name>=<package-version-number> OR sudo apt-get install <package-name>=<package-version-number>
Check if it works: avrdude -p <your part name> -c <your programmer name (avrispmkII)>
You might have to specify a port. Use something like ''watch ls /dev/tty*'' to find your device if you get an error like this one:
(trusty)chandran#localhost:~$ avrdude -c avrispmkII -p t85
avrdude: ser_open(): can't open device "/dev/ttyS0": No such file or directory
avrdude done. Thank you.
Here is what it will look like when you get it right:
(trusty)chandran#localhost:~$ avrdude -c avrispmkII -p t85 -P usb -vv
avrdude: Version 5.11.1, compiled on Oct 30 2011 at 10:37:28
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch
System wide configuration file is "/etc/avrdude.conf"
User configuration file is "/home/chandran/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : usb
Using Programmer : avrispmkII
avrdude: usb_open(): cannot read serial number "No error"
avrdude: usbdev_open(): Found AVRISP mkII, serno: [unknown]
avrdude: usbdev_open(): using read endpoint 0x83
AVR Part : ATtiny85
Chip Erase delay : 4500 us
PAGEL : P00
BS2 : P00
RESET disposition : possible i/o
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 6 4 0 no 512 4 0 4000 4500 0xff 0xff
flash 65 6 32 0 yes 8192 64 128 4500 4500 0xff 0xff
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 2 0 0 0 0 0x00 0x00
Programmer Type : STK500V2
Description : Atmel AVR ISP mkII
Programmer Model: AVRISP mkII
Hardware Version: 0
Firmware Version Master : 1.255
Vtarget : 3.3 V
SCK period : 8.00 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e930b
avrdude: safemode: lfuse reads as 62
avrdude: safemode: hfuse reads as DF
avrdude: safemode: efuse reads as FF
avrdude: safemode: lfuse reads as 62
avrdude: safemode: hfuse reads as DF
avrdude: safemode: efuse reads as FF
avrdude: safemode: Fuses OK
avrdude done. Thank you.
If this doesn't fix your problem, you might want to look at some other solutions:
https://electronics.stackexchange.com/questions/78302/avrisp-mkii-not-reading-device-signature/189488
https://electronics.stackexchange.com/questions/67757/why-does-my-avrisp-mkii-programmer-not-work
AVRISP MKII doesn't work with AVRDUDE on Linux
https://electronics.stackexchange.com/questions/74298/how-does-avrdude-with-avr-isp-mkii-respond-when-no-target-board-is-connected
Good luck!
I have similar issue as here(AVRISPmkII connection status: Unknown status 0x00) but different setup and changing bitcklock didn't help.
The current setup is atmega328p with external oscillator 16MHz connected to ISP interface of avrisp mkII programmer but whatever I do It keeps on showing the same output all the time:
mike#asus:~/wireless-temp-sens/tests$ sudo avrdude -p atmega328p -P usb -c avrispv2 -U lfuse:w:0xff:m -U hfuse:w:0xd9:m -U efuse:w:0xfe:m -v
avrdude: Version 6.0.1, compiled on Oct 21 2013 at 17:07:18
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch
System wide configuration file is "/etc/avrdude.conf"
User configuration file is "/home/mike/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : usb
Using Programmer : avrispv2
avrdude: usbdev_open(): Found AVRISP mkII, serno: 000200209719
AVR Part : ATmega328P
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : STK500V2
Description : Atmel AVR ISP V2
Programmer Model: AVRISP mkII
Hardware Version: 1
Firmware Version Master : 1.23
Vtarget : 4.9 V
SCK period : 2053.39 us
avrdude: stk500v2_command(): command failed
avrdude: stk500v2_program_enable(): bad AVRISPmkII connection status: Unknown status 0x00
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.
avrdude done. Thank you.
Any help is appreciated!
Problem resolved! Don't remember what was the reason exactly. I guess clock crystal didn't have proper connections on a breadboard. So, I would say:
Check your wiring
Check your wiring
Check your wiring
I got a question about redirect the screen output into a single file. Here is my code to print the screen output:
for O,x,y,z,M,n in coordinate:
print(O,x,y,z,M,n)
And the screen output looks like:
O 0 0 0 ! 1
O 1 0 0 ! 2
O 2 0 0 ! 3
So how can I redirect all the data into a single file and in the same format, just like the screen output. Because it will be mush faster to get all the data rather than waiting for the screen output to finish.
I triedfor point in coordinate:
file.write(' '.join(str(s) for s in point)) but output file became:
O 0 0 0 ! 0O 1 0 0 ! 1O 2 0 0 ! 2O 3 0 0 ! 3O 4 0 0 ! 4O 5 0 0 ! 5O 6 0 0 ! 6O
You could simply redirect the console output to a file
$ python yourscript.py > output.txt
No code changes necessary.
The print function has a keyword-only parameter file which specifies the file object to be written to. That's the easiest way to go:
for O,x,y,z,M,n in coordinate:
print(O,x,y,z,M,n,file=output_file)
The reason your write code wasn't working is that you were not putting a newline character at the end of each entry. You could also try fixing that:
file.write(' '.join(str(s) for s in point) + '\n')