TMS320F280025: I2C Speed

Hung Kai Woo1

Part Number: TMS320F280025

I would like to know how to configure a I2C speed. I am using 20M external crystal and CPU clock is 100M.

0 Manoj Santha Mohan over 3 years ago

Woo1,

Below function found in i2c.c driverlib can be used to

I2C_initMaster(uint32_t base, uint32_t sysclkHz, uint32_t bitRate,
I2C_DutyCycle dutyCycle);

Example:

I2C_initMaster(I2CA_BASE, DEVICE_SYSCLK_FREQ, 400000, I2C_DUTYCYCLE_33);

Here,

DEVICE_SYSCLK_FREQ is 100 MHz and

I2C speed is 400 KHz.

Regards,

Manoj

0 Hung Kai Woo1 over 3 years ago in reply to Manoj Santha Mohan

What is I2C_DUTYCYCLE_33

+1 Manoj Santha Mohan over 3 years ago in reply to Hung Kai Woo1

Hung Kai Woo1 said:
What is I2C_DUTYCYCLE_33

I2C_DUTYCYCLE_33 is defined I2C_DutyCycle enumerator. This is used to set the dutycycle for I2C SCL signal.

It can be either I2C_DUTYCYCLE_33 (or) I2C_DUTYCYCLE_50.

Regards,

Manoj

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