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Kernel source tree for Raspberry Pi-provided kernel builds. Issues unrelated to the linux kernel should be posted on the community forum at https://forums.raspberrypi.com/
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May 16 firmware: AIRPI i2c BMP085 and BMP180 temp and pressure sensors misread #599

Closed g7ruh closed 10 years ago

g7ruh commented 10 years ago

May 16th firmware causes temp and pressure sensors to misread ![Uploading pressure reading issue.PNG . . .]() ![Uploading temp reading issue.PNG . . .]()

reverting to May 13th firmware fixes the problem. This is on 2 PIs here : https://xively.com/develop/a73wzKTeenrmwkbKnrZq and here https://xively.com/develop/5sS4LOiW-HpUN0kuPKG0 Note that the graphs show average so take time to "change". Viewing raw data shows fix works.

reposted here as requested by popcornmix

popcornmix commented 10 years ago

Looks to be caused by: https://github.com/raspberrypi/linux/pull/318

@cbeytas can you help with this?

cinhil commented 10 years ago

Hello, I also have i2c issues since 16 May firmware. Reverting to 13th May fixes the problem. I have sometimes read and write problem on RTC clock ds1307. It fails in 10% of read/write test.

cinhil commented 10 years ago

Hello, With a revert of "Perform I2C combined transactions when possible" commit, I do not have any problem with the RTC DS1307 anymore. Regards,

Swap-File commented 10 years ago

I also have i2c issues with my Minimu9 http://www.pololu.com/product/1268 running Minimu9-ahrs https://github.com/DavidEGrayson/minimu9-ahrs since the May 16th firmware. I reverted to May 13th firmware and it fixed it.

popcornmix commented 10 years ago

The combined I2C transactions commit is now disabled by default. Please run rpi-update and test.

g7ruh commented 10 years ago

Hi popcornmix,

updated and tested, all back to normal, many thanks for all your hard work making the pi GREAT (and others too)

Roger aka G7RUH

popcornmix commented 10 years ago

Exellent. Okay to close?

Swap-File commented 10 years ago

It's tested and working for me too. Thanks!

g7ruh commented 10 years ago

Thanks Swap-File too. Popcornmix, fine to close.