CC1352R: I2C_open() and I2C_close() toggles both SDA and SCL lines

Spandan Dey1

Part Number: CC1352R

With simplelink_cc13xx_cc26xx_sdk_5_40_00_40 we noticed that I2C_open() and I2C_close() toggles both SDA and SCL lines

This toggling causes one of our I2C devices to become unresponsive after the first transaction.

Here is a capture of the first transaction and you can see the toggling on either side.

Is it possible to avoid this?

Thanks in advance

/Spandan

over 2 years ago

+1 Arthur R☑️ over 2 years ago

TI__Mastermind 21129 points

Hi Spandan,

This is a known issue in this SDK, as seen here: https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/1102080/cc1312r-glitch-on-i2c-lines-after-upgrading-to-sdk-6-10-removal-of-pin-driver

Thus, could you please update to the 6.30 version of the SDK?

Regards,

Arthur

0 Spandan Dey1 over 2 years ago in reply to Arthur R☑️

Prodigy 40 points

Thanks for the response.

Just one followup question.

Bumping the SDK would be quite big task for now as we also want to move to CLANG while we are at it.
Is it possible to bring in the just fix from SDK 6.30 into 5.40?

Thanks in advance
/Spandan

Sub-1 GHz

Sub-1 GHz forum

CC1352R: I2C_open() and I2C_close() toggles both SDA and SCL lines