I2C clock cannot be set to 10kHz

RE: I2C clock cannot be set to 10kHz

Vidar Berg — Fri, 06 Dec 2024 09:45:26 GMT

The driver only supports the frequencies listed in the FREQUENCY register. To use other values, you need to patch the driver.

RE: I2C clock cannot be set to 10kHz

DX_HK — Fri, 06 Dec 2024 09:40:54 GMT

Is there a setting in Zephyr that allows this?
Or is there an API that does this?

RE: I2C clock cannot be set to 10kHz

Vidar Berg — Fri, 06 Dec 2024 07:37:37 GMT

Hello,

The lowest frequency we list as supported in HW is 100 Hz (TWIM). You may experiment with lower values in the FREQUENCY register, but it is not guaranteed that the peripheral will be able to meet the timing requirements set by the i2c specification. Have you calculated how strong pull-up you need to determine whether you can use the internal ones or not?

Best regards,

Vidar