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Ioerror Errno 5 Input/output Error I2c

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| Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Gumstix I2C-Problem: "ioctl failed: Remote I/O error http://gumstix.8.x6.nabble.com/Gumstix-I2C-Problem-quot-ioctl-failed-Remote-I-O-error-121-quot-td637469.html (121)" Hello, I got a verdex, a netwifimicrosd and a robostix, all http://www.lejos.org/forum/viewtopic.php?t=8216 boards are properly connected. I use the FFUART to attach the console and gumstix boots property. But when I try to read or write through i2c, get the following error: ------------------------------------------------------------------------- root@gumstix-custom-verdex:~$ i2c 82 WriteByte 0 128 i2c: error: exhausted retries i2c: msg_num: 0 msg_idx: -2000 msg_ptr: errno 5 0 i2c: ICR: 000007e0 ISR: 00000002 i2c: log: [00000446:000007e0] ERROR: I2cTransfer: ioctl failed: Remote I/O error (121) ERROR: I2cWriteBytes failed: -1 root@gumstix-custom-verdex:~$ ------------------------------------------------------------------------- And Here's the complete Bootlog (copied from console): ------------------------------------------------------------------------- daniel@daniel-laptop:~$ minicom -o Willkommen zu minicom 2.3-rc1 Optionen: I18n Übersetzt am Dec 10 2007, 10:36:19. Port /dev/ttyUSB0 Drücken Sie CTRL-A Z für Hilfe zu speziellen Tasten U-Boot 1.2.0 errno 5 input (Dec 21 2007 - 13:37:16) - PXA270@600 MHz - 1578M *** Welcome to Gumstix *** DRAM: 128 MB Flash: 32 MB Using default environment Hit any key to stop autoboot: 0 Instruction Cache is ON Copying kernel to 0xa2000000 from 0x01f00000 (length 0x00100000)...done ## Booting image at a2000000 ... Image Name: Angstrom/2.6.21/gumstix-custom-v Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 933772 Bytes = 911.9 kB Load Address: a0008000 Entry Point: a0008000 OK Starting kernel ... Linux version 2.6.21 (siddian@holylap) (gcc version 4.1.2) #1 Mon Jun 16 18:51:8 CPU: XScale-PXA270 [69054117] revision 7 (ARMv5TE), cr=0000397f Machine: The Gumstix Platform Memory policy: ECC disabled, Data cache writeback Run Mode clock: 208.00MHz (*16) Turbo Mode clock: 624.00MHz (*3.0, active) Memory clock: 104.00MHz (/2) System bus clock: 104.00MHz CPU0: D VIVT undefined 5 cache CPU0: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets CPU0: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets Built 1 zonelists. Total pages: 32512 Kernel command line: console=ttyS0,115200n8 root=1f01 rootfstype=jffs2 r

about the EV3 hardware related topics such as the brick, sensors, LEGO pieces, etc. Moderators: roger, gloomyandy, skoehler Post Reply Print view Search Advanced search 5 posts • Page 1 of 1 ruperty Advanced Member Posts: 172 Joined: Sun Oct 14, 2007 11:21 am I2C I/O error Quote Postby ruperty » Sun Feb 07, 2016 11:41 pm I get this occasionally when a program has been running for a while. The NXTUltrasonicSensor is running in a separate thread. It doesn't coincide with the hanging issue I posted earlier so it may be a separate issue. In this case the program continues and the EV3 responds but the sensor value doesn't change. lejos.hardware.port.I2CException: I2C I/O error at lejos.internal.ev3.EV3I2CPort.i2cTransaction(EV3I2CPort.java:129) at lejos.hardware.sensor.I2CSensor.getData(I2CSensor.java:133) at lejos.hardware.sensor.NXTUltrasonicSensor.getData(NXTUltrasonicSensor.java:95) at lejos.hardware.sensor.I2CSensor.getData(I2CSensor.java:115) at lejos.hardware.sensor.NXTUltrasonicSensor$DistanceMode.fetchSample(NXTUltrasonicSensor.java:197)Any suggestions for what causes this? Regards,Rupertwww.perceptualrobots.com Top Aswin leJOS Team Member Posts: 274 Joined: Tue Apr 26, 2011 9:18 pm Location: Netherlands Contact: Contact Aswin Website Re: I2C I/O error Quote Postby Aswin » Sun Feb 07, 2016 11:49 pm Hi Rupert,At what rate do you sample the sensor? It should be sampled at rates below 15 Hertz.Aswin My NXT blog: http://nxttime.wordpress.com/ Top gloomyandy leJOS Team Member Posts: 5435 Joined: Fri Sep 28, 2007 2:06 pm Location: UK Re: I2C I/O error Quote Postby gloomyandy » Mon Feb 08, 2016 4:39 am You will not be getting updates because the thread that samples the sensor will have been terminated by the exception. You have a few things to try:* Add a delay into your sample loop (try 10mS or delay). The sensor driver already contains code to limit the rate at which it samples but it may be that from time to time the sensor is still not ready.* Increase the retry count by calling the setRetryCount method http://www.lejos.org/ev3/docs/lejos/har ... Count-int- try increasing the count to 10 or perhaps even more.* Catch the exception delay a little and then try again. leJOS news https://lejosnews.wordpress.com/ Top gloomyandy leJOS Team Member Posts: 5435 Joined: Fri Sep 28, 2007 2:06 pm Location: UK Re: I2C I/O error Quote Postby gloomyandy » Mon Feb 08, 2016 4:39 am Oh and I assume you are using 0.9.1 if not why not? leJOS news https://lejosnews.wordpress.com/ Top rup

 

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