Problem with I2C2 on PIC24FJ32GA102

[alexpisarev]

Hi Everyone,

Witnessing a weird issue on PIC24FJ32GA102 when using I2C2.

TRISB.3 = 0
TRISB.2 = 0

I2C2_Init(100000)

I2C2_Start()
I2C2_Write (%01011010) 'General Call Address

[some other code]

It never returns from the Write call, so [some other code] never gets executed.

When re-writing the same piece of code with I2C1 (and after remapping the pins from SDA2/SCL2 (RB.2/RB.3) to SDA1/SCL1 (RB.8/RB.9) respectively), everything works just fine.

Is there anything else we should be looking at?

Thanks in advance.

[uros.cvetinovic]

Hi,

Do you have some slave on those I2C lines?

Please note that I2Cx_Write function is blocking function, and it will hang if you don't have any slave on used I2C lines.

Best regards,

Uros

[alexpisarev]

Yes, slave is there and responds well when I switch to I2C1.

It is only I2C2 which is causing problem.

[uros.cvetinovic]

Hi,

Would it be a problem for you to submit a ticket on this subject and zip and send project that can reproduce this behavior.
http://helpdesk.mikroe.com/

We will help you out on this.

Best regards,

Uros