CCS/TM4C1294NCPDT: Other microcontrollers forum

Jonathan Lee89

Part Number: TM4C1294NCPDT

Tool/software: Code Composer Studio

Hi E2E team.

This is Jonathan from Avnet Korea.

One of our customer has been developing industrial controller with TI's TM4C1294NCPDT, and they have a hard time testing I2C Slave mode.

According to customer's feedback, there is no any problem with I2C master mode but it doesn't work with I2C(I2C0) Slave mode.

What is unique about this issue is that the voltage level of Pin PB2(I2C0SCL) is changing from 3.3V to 0V after the I2C initialization function execution.

- I2C initialization Function : I2CSlaveInit(I2C0_BASE, SLAVE_ADDRESS >> 1);

I would appreciate it if you could review this issue.

Thanks.

over 6 years ago

0 Ralph Jacobi over 6 years ago

TI__Guru*** 135355 points

Hello Jonathan,

Can the customer share scope captures of this happening for our review?

And are they observing the TM4C pulling SCL down permanently, or for a period of time? If a period of time, for how long?

0 Ralph Jacobi over 6 years ago

TI__Guru*** 135355 points

Hello,

I haven't heard back from you, so I’m assuming your customer was able to resolve the issue.

I will close this thread now, but if you have not solved this issue then post a reply below (or open a new thread if the thread has locked due to time-out).

0 Jonathan Lee89 over 6 years ago in reply to Ralph Jacobi

Intellectual 380 points

Hello E2E Team.

The problem were solved by customer's own solution.

To solve this problem, RT-OS has to be disabled.

Thanks you for your time and reviewing.

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