Getting Data at the same time using i2c.

Hassan Haroon

Hello,

I am using Rm46x mcu with an i2c based IMU. The idea is to develop a safe system in which we get the data from e.g 2 IMUs at the same time and compare them. I know in one i2c line we have a delay between communication of two IMUs. Is there any way of getting data at the same time? What if we have two i2cs in a microcontroller? or there is any way of doing it?

Thanks.

over 9 years ago

0 Charles Tsai over 9 years ago

TI__Guru**** 191906 points

Hi,
If you need two I2C then RM57Lx may be an option for you to consider. For RM46 you might also consider using NHET by writing HET code to emulate I2C which is a more complicated task. Even if you have two I2C, you can't really send commands to both IMU and receive the data at exactly the same cycle, right? The CPU can only work with one at the time.

0 Hassan Haroon over 9 years ago in reply to Charles Tsai

Intellectual 830 points

Hi Charles,

Thank you for your answer so thats mean we cannot get data in parallel from both the IMUs.

0 Charles Tsai over 9 years ago in reply to Hassan Haroon

TI__Guru**** 191906 points

Hi Hassan,
That is my understanding unless you have a different idea. The CPU will need to setup one I2C first and communicate with the first IMU before it can setup the second I2C to communicate with the second IMU. Sending commands and receiving data from two IMU in exactly the same cycle is not possible.

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Getting Data at the same time using i2c.