Mbed-os: Nordic RF52 Separate TWI blocks (I2C/SPI) cannot be used in parallel from different threads

Created on 12 Jan 2018  路  5Comments  路  Source: ARMmbed/mbed-os

Using RF52833, Any Mbed > 4.5

I'm not sure if this is a known or deliberate (but undocumented) restriction?

It seems not to be possible to use multiple TWI blocks from different threads. In practice I have seen this on a platform with both SPI (for file system) and I2C (for sensors/comms)

If the I2C bus is used on a background thread (to poll a sensor for example) and the file system is read (over SPI) at the same time, the file system will fail to return to the caller (I suspect that the low level SPI code is returning a fault condition but haven't traced it this far).

nordic bug
Source
picture NeilMacMullen

All 5 comments

Adding @MarceloSalazar and @dlfryar as watchers

NeilMacMullen picture NeilMacMullen on 12 Jan 2018
👍1

cc: @marcuschangarm @ARMmbed/team-nordic

dlfryar-zz picture dlfryar-zz on 12 Jan 2018

cc @nvlsianpu

screamerbg picture screamerbg on 30 Jan 2018

This should be fixed in this PR to our new feature branch: https://github.com/ARMmbed/mbed-os/pull/6296

Progress on the new feature branch can be followed here: https://os.mbed.com/forum/upcoming-features/topic/29477/

marcuschangarm picture marcuschangarm on 8 Mar 2018

The feature branch was integrated, this issue should be resolved

0xc0170 picture 0xc0170 on 18 May 2018
👍1
Was this page helpful?
0 / 5 - 0 ratings

Related issues

bcostm picture bcostm  路  4Comments
sarahmarshy picture sarahmarshy  路  4Comments
neilt6 picture neilt6  路  4Comments
0xc0170 picture 0xc0170  路  3Comments
MarceloSalazar picture MarceloSalazar  路  3Comments