RTOS/OPT3001: How to get I2C sensors like OPT300X, TMP112, HDC1080 to work in High Speed Mode (>2MHz) using the I2C drivers in TI-RTOS

Shantam Raj23

Part Number: OPT3001
Other Parts Discussed in Thread: CC2650, CC2650MODA, HDC1080, , TMP112

Tool/software: TI-RTOS

I am working with CC2650 Launchpad for development and CC2650MODA for custom design. I have all the 3 sensors i.e OPT3001, TMP112, HDC1080. In the datasheet its mentioned that they support High Speed Mode i.e frequency > 2MHz. However in the I2C Drivers available in TI-RTOS for CC2650 i can only see options to run the sensors either at 100kHz or 400kHz with the following declaration in I2C.h file -

typedef enum I2C_BitRate {
    I2C_100kHz = 0,
    I2C_400kHz = 1
} I2C_BitRate;

Why is there no option for High Speed Mode?

How can i implement it myself using the given TI-RTOS I2C driver itself ?

over 5 years ago

0 Alex Bhandari-Young over 5 years ago

TI__Mastermind 25815 points

Hi Shantam,

I am in the group that handles the OPT parts. However, since your question concerns getting the MCU set in high speed mode I have forwarded to the MCU group to help out.

Best,

Alex

0 Shantam Raj23 over 5 years ago in reply to Alex Bhandari-Young

Intellectual 795 points

Thanks Alex, hoping to get some valuable inputs from them.

0 Siri over 5 years ago in reply to Shantam Raj23

TI__Guru* 79421 points

From the CC2650 data sheet: "The I2C interface is capable of 100-kHz and 400-kHz operation, and can serve as both I2C master and I2C slave."

BR

Siri

0 Shantam Raj23 over 5 years ago in reply to Siri

Intellectual 795 points

Hi Siri,

I am asking about the High Speed Mode i.e Frequency greater than 2MHz as you can see in the section 7 of the datasheet -

The drivers in TI-RTOS seem to have native support for 100 and 400 kHz only. How do i make the interface run at 2.6 MHz ?

0 Alex Bhandari-Young over 5 years ago in reply to Shantam Raj23

TI__Mastermind 25815 points

Hi Shantam and Siri,

I wanted to chime in since the OPT3001 was mentioned again. The OPT3001 supports high speed mode, but will also require an MCU that supports high speed mode.

Best,

Alex

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RTOS/OPT3001: How to get I2C sensors like OPT300X, TMP112, HDC1080 to work in High Speed Mode (>2MHz) using the I2C drivers in TI-RTOS