Software :: Communication With Some Small SPI Driver
Mar 15, 2010
I am moving some code for to work with SPI interface from windows to Linux SUSE platform and for to make it working I have to communicate with some small SPI driver.
I have few libraries generated by that driver:
libi2cbrdg.a
libi2cbrdg.la
libi2cbrdg.so
libi2cbrdg.so.1
libi2cbrdg.so.1.1.0
I am compiling my project with following makefile:
comp: ErrorCodes.h Errors.h FrameDll.h FrameDllHeader.h Framework.h Functions.h TargetProcessor.h Layout1.h ModCommon.h ModScalerDB.h ProxyIDs.h SPIProxy.h SPITuning.cpp ModBiquad.h ModCommon.h ModDeinterleave.h ModFloatToFract32.h
g++ -g -L./lib -li2cbrdg ErrorCodes.h Errors.h FrameDll.h FrameDllHeader.h Framework.h Functions.h TargetProcessor.h Layout1.h ModCommon.h ModScalerDB.h ProxyIDs.h SPIProxy.h SPITuning.cpp -o comp.o
Output:
SPIProxy.h: In member function "virtual int CSPIProxy::_Read(void*, int)":
SPIProxy.h:55: error: "U2C_IoWrite" was not declared in this scope
SPIProxy.h:56: error: "U2C_SpiRead" was not declared in this scope
SPIProxy.h: In member function "virtual int CSPIProxy::_Write(const void*, int)":
SPIProxy.h:65: error: "U2C_IoWrite" was not declared in this scope
SPIProxy.h:66: error: "U2C_SpiWrite" was not declared in this scope .....
But still as u see I have some functions missed I know that they are in these libraries.
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Apr 3, 2010
i woul like to know if i could get help in writing a charater device driver for communication between two pc's in linux using RS-232 serial port.
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Apr 28, 2010
I am in verse to understand the serial communication between guest and host.I have just added a serial port through VI Client selecting "Use serial port on host"(host being ESX host).If I am on VM and run :
ll > /dev/ttyS0
I understand that it should get displayed through ESX Host. So On ESX Host, I typed:
cat /dev/ttyS0
But nothing worked !
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May 11, 2011
How do you interface with the Linux I2C driver from kernel space? For example, if I had LEDs connected to a GPIO expander on the I2C bus, how would I blink them twice before going down for reset from machine_reset()?
Essentially, I believe I need to call the functions i2c_smbus_write_byte(), i2c_smbus_read_byte(), etc. But these functions require I2C client data that I do not understand how to supply.
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Sep 20, 2010
I am writing a code which communicates between 2 processes created by fork() statement. Parent reads a file and write the data into a shared memory and sends a signal to the child. The child then receives a signal from the parent to start reading. After finishing the read operation the child sends a signal to the parent asking it to resume its action. Some things are going wrong in my code.
1. segmentation error in memcpy() statement.
2. terminal hangs after running the code.
3. Synchronization problem between processes..
Code: #include <stdio.h>
#include <sys/types.h>
#include <wait.h>
#include <unistd.h>
[code].....
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Aug 24, 2010
I have been able to use bash to initiate a google seache via firefox. I would like to either copy the source page to a file via wget or send firefox short cuts to the other terminal's firefox search page to put the html file in a directory. I seem to remember but maybe incorrectly that there exist hexadecimal codes for each keyboard shortcut in firefox. Maybe these could be echo-ed from bash to the firefox search page.
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Aug 3, 2010
I'm running Fedora11 OS on my desktop.my HSPA USB modem(Prolink PHS101 HSPA modem)is not detected as communication device. it detected as a CD ROM. could you please tell me the way to make functioning of it in Fedora 11 how to switch to communication mode.
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Jan 13, 2010
I have two ethernet card on my computer, I want to make a TCP or UDP communication between these two cards, so I disable loopback: #ifconfig lo down. but with out loopback I can't even ping an eth from another one. how should I do? I want traffic to really pass eth cards.
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Jan 21, 2010
Has anybody tried to get the USB server 'LANSER-E1' from 'MRT Communication' working in Linux ? It works OK in Windows but I have failed to get it working in Debian Sid.
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Oct 28, 2010
Code:
DMZ
Server--Router0--Modem0 ISP2--Modem3--Router3--Client3
/
Client1--Router1--Modem1--ISP1--WAN
/
Client2--Router2--Modem2 ISP3--Modem4--Router4--Client4
The Server in the above diagram can be accessed by Client3 and Client4 but not at all by Client1 or Client2. Router0 specifies the Server as a DMZ Host. I would be more specific but this is not my server. I don't use a DMZ, I forward ports when they are needed. In this case I represent ISP1 and the server belongs to a befuddled client. Client1 & Client2 can send packets to each other, no problem. Could the DMZ be breaking communication between the Server and Clients 1 & 2?
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May 16, 2010
I was going to upgrade apache from version 1.3 to version 2.2.15 on a test server (and later on prod servers).. i prepared really good for it by reading upgrading information, changes from 1.x - 2.x, read module documentation to check if any of the used modules had any different syntax and if it was supported for this new version of apache. Later i finally installed apache, upgraded all the used modules to be apache 2 compatible and everything seemed to go smooth. I started apache and resin and everything looked fine, the syntax was OK and everything so i reported back that it was ready.. but i got a feedback that the people that were going to use the server only got a proxy error or service unavailable error when apache was trying to send requests back to the backend resin server.. and this is the problem. I could just have told you that this was the problem, but i find it to be much easier if you have a little background information first to explain how the problem aried.
A couple of other people and myself has done quite extensive troubleshooting on this, we troubleshooted apache, mod_caucho and resin by themselves to check if it was any problems with them.. we could only find that mod_caucho didnt seem to behave correly, the caucho-status page was displaying an empty list of requests and what would be proxied back.. we are running the same version of mod_caucho and resin to be sure it would be compatible with eachother and all the software is running in 64-bit, only a 64-bit CentOS 4.4 OS (yes, the OS is really old but because of complications we are not ready to upgrade it yet).
When we try to telnet to the port where resin is listening its open and resin returns an X when you hit enter (like it should and says in Caucho' official troubleshooting tips). We have tried installing apache 2.2.11 instead of 2.2.15 and other versions of both resin and mod_caucho. Other modules has also been tried like mod_proxy to send the requests back and also the rewrite module with the P flag.. although this was not the preferred way to do it we only wanted to see if it had any difference which it didnt.
So after several hours of troubleshooting we are still not able to find the cause of why we are getting a proxy error (http 502) when apache is trying to send a request back. We have checked all the logs for apache and resin, we have also compiled the mod_caucho module with the "--enable-debug" option to get more verbose information but we didnt get any additional information this way eventhough we should according to Caucho' official site.
We have looked into both the resin and apache config and tried both ways of configuring mod_caucho.. and nothing seems to change the result.. we only get a 502 proxy error. So since it didnt work i downgraded to apache 1.3 one day and that was fine.. then it was upgraded again to apache 2.x to try to find out what the problems were but again we didnt find this.. so i was going to downgrade it again, but this time on a different test server, but after downgrading i for some very weird reason got the same proxy error i had when using apache 2 which is beyond my comprehension.. i just cannot understand this.
- has anyone had any similar experiences with or without the same setup ?
- does anyone know about any solution to this of can provide any additional advice on what to do further? Yes, we want the functionality in apache 2 so we will not settle with apache 1.3.. one of the features being the new filters to be able to capture requests for pre and post processing before they hit other modules.
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Nov 22, 2010
I would like to send struct data from process A to process B but I dont known what is the best way. I have read about IPC, but there are a lot of ways to do it.
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Mar 27, 2011
I have an application which is separated to several parts (processes) communicating over TCP/IP, using a pre-defined port on localhost.Is this always safe? Can some kind of a firewall (corporate, locally installed, Windows firewall, etc) block this traffic? Or can some user settings in the OS that can block this traffic?The OSes I'm interested in are Windows (XP through 7) and Linux (Ubuntu, RHEL, SUSE)
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Jan 13, 2010
Just installed Ubuntu 9.10 after vista I never want to go near windows again, I want to make it clear I am a complete novice at this, wouldn't know what a command line was if it jumped up and bit me on the bum, let alone how to edit one.
Installed an HP PSC 1300 all in one printer, system sees it, installs it without any trouble, as soon as I try to print it just hangs there in pending till it defaults and I get communication error 5012, also the message /usr/lib/cups/backend/ hp failed.
I have removed and re-installed the printer and the latest version of hplip more than once but am getting nowhere, the printer and cable work fine when attached to my laptop which is running xp until i learn more about Linux.
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Feb 15, 2010
Today I installed Ubuntu server 9.10 on my old sony laptop with 512MB of RAM and 2.4GH celeron CPU. I hooked up my server to the router(D-Link) using cable. Now I try to upload or download data(mostly my music) to the server the speed is no higher than 500-700 KB/s. Although at first it used to be around 1.2 MB which is still considered to be low, but is there anyone who knows what I should do? By the way, I use SSH on Ubuntu 9.10 to connect to my server.
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May 1, 2010
I upgraded to 10.04 yesterday and Firefox, or rather something I don't know that's replaced it called "Namoroku", worked fine. Today Firefox won't work and Thunderbird and Evolution won't work, either with wifi or with a direct Ethernet link. When I did the System Test, it claimed that the internet connection was fine, but I can't get anything in or out. This is on an Acer Aspire One that I have configured as dual boot with Windows 7. Under Windows Firefox works fine on the wifi. I haven't checked on the Ethernet connection, but assume it works if the wifi does.
Ubuntu also tells me that my battery is "broken", although that's a lesser problem. I can ignore that. Windows has no problem with the battery, either.
Here's the sudo lshw -c net output...
*-network
description: Ethernet interface
product: Atheros AR8132 / L1c Gigabit Ethernet Adapter
vendor: Atheros Communications
physical id: 0
[Code]....
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Feb 27, 2010
i am using NCTUns simulator and having problem while receiving message from an OBU. sending a message works properly but recving creates problem and fails. i am using exactly the same function as used by the developers in the demos but still no luck. i copy the code attch the screen shots to have a look
sendto() and recvfrom() are used for message transfer. they both return >-1 if they are executed successfully. please have a look in the screenshots. agentClientReportStatus is the built in packet format which im using here whose fields i filled manually are in the code below.
agentClientReportStatus *message,*mssg;
int remainTime,n,n2,n3,i,sendingaddress,value;
sockaddr_in cli_addr;
timeval now;
[Code].....
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Apr 6, 2011
My setup is as follows,
Machine-1
- Two network interface cards on same network with different MAC say MAC-1 and MAC-2
- IP 10.209.193.130 and 10.209.193.131
- Firewall IP tables empty iptables -F
Machine-2
- One NIC with IP 10.209.193.135
switch
- both machines are connected to common switch and can ping happily.
Problem:
when I send ping request from Machine-2 to Machine-1 arp tables are initialized for IP MAC pair. Surprisingly both IP are get resolved to one MAC i.e MAC-1. general observation is, MAC of first interface which has route in kernel route table. I cross checked this on Suse11 and RHEL5 same result. but In suse10 I am getting expected behavior [i.e IP1-MAC1 and IP2-MAC2 pair in arp cache]. Do any one know why kernel is using same NIC for two different interfaces?
Output for Suse11 and RHEL 5
Code: ? (10.209.193.131) at 00:0c:29:34:e7:6f [ether] on eth3
? (10.209.193.130) at 00:0c:29:34:e7:6f [ether] on eth3 Output for Suse10
Code: ? (10.209.193.128) at 00:0c:29:02:9a:7c [ether] on eth3 <-------- Suse 10 machine-1
? (10.209.193.131) at 00:0c:29:34:e7:6f [ether] on eth3
? (10.209.193.127) at 00:0c:29:02:9a:72 [ether] on eth3 <-------- Suse 10 machine-2
? (10.209.192.1) at 00:00:0c:07:ac:07 [ether] on eth3
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Sep 21, 2010
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/dev/ttyE0
/dev/ttyE1
When I connect a null modem cable from port 0 of the card in the new computer to serial 0 of another computer, I can receive text from the other computer. When I do this... code...
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Feb 28, 2011
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Feb 24, 2010
I am very new to linux and I have been given a school project that involves getting my windows pc talking to a linux single board computer that I have. It can be found here. [URL]. I have two bluetooth usb dongles, one to plug into my pc and one to plug into my linux board, I know that both work as I have tried talking to them both using my mobile/cell phone. Also when I plug the dongle into my linux board it recognizes something has been plugged in. However I am unsure where to go from here. I have tried "searching" for the device using my windows pc, but it will only find my cell phone and not my linux board. I also tried mounting it similar to how i would mount a usb drive e.g. mount dev/sda etc. How to setup the linux board for bluetooth communications?
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Apr 25, 2011
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As a test, I used a serial mouse in the serial port and It didn't work. I verified the Bios Setup and COM 1 and COM 2 are enabled.
I also checked my system serial support with the following commands:
And messages were OK when compared with typical outputs. My machine is a Pentium 4 CPU 1.6 GHz, in a U8668 motherboard (Award Software International). I have Ubuntu 10.04 LTS with Gnome.
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[code]...
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May 29, 2011
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Jun 30, 2011
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Mar 15, 2010
Not really sure where to post this, so here goes... I installed apache2, php and MySQL via LAMP and everything seems to work fine but when I try to open the COM1 port to do serial communication via PHP, I get a permission denied error.
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$fp=fopen("COM1:","w+");
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Sep 28, 2010
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Dec 13, 2010
I was trying out the parallel port communication on RHEL 6 but found it not working:
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