K82: I2C HW timeout

EugeneHiihtaja — Tue, 18 Dec 2018 08:45:46 GMT

Hello !

I have checked SDK examples and do not find any place where those registers are set :

__IO uint8_t SLTH; /**< I2C SCL Low Timeout Register High, offset: 0xA */
__IO uint8_t SLTL; /**< I2C SCL Low Timeout Register Low, offset: 0xB */

It means by default timeout has infinite value ?

In what units those registers should be programmed ? Period of clock 400kHz or some other ones ?

Regards,

Eugene

Re: K82: I2C HW timeout

Robin_Shen — Thu, 20 Dec 2018 08:58:03 GMT

Hi Eugene Hiihtaja,

The default value of Low Timeout Register was 0x00, which means low timeout function is disabled.

I did not find any driver initialize the Low Timeout Register, you may need to write it by yourself.
For example:
I2C0->SLTH = I2C_SLTH_SSLT(0x01);
I2C0->SLTL = I2C_SLTL_SSLT(0x01);

The I2C module clock means Bus clock. I2Cx_SMB[TCKSEL] select the period of clock of timeout.

Best Regards,

Robin

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