FR5739 I2C communication documentation and hints

JOHAN SANDGREN

I everyone,

I've read the manuals I find for the FR5739 about I2C communication.

I fail to find how to set the tertiary functions for the pins 1.6 and 1.7 (IC2). In the manuals I find only mentioning about that pins have secondary and tertiary functions.

Is this not needed when using I2C?

What I'm trying to do, is communicate with the MPU-6050 with I2C.
The 6050-documentation is clearly describing the protocol of sending and receiving bytes and stuff over I2C.
It's the CPU-docs that I don't find give me a clear uinderstanding about how to exactly do it in code for this cpu.
I wish there was talk about how to switch from sending to receiving bytes intermittently . That couldn't be so unusual could it?

Help?

Thanks,

Johan

over 11 years ago

0 Leo Hendrawan over 11 years ago

TI__Guru 56650 points

Hi,

JOHAN SANDGREN said:

I fail to find how to set the tertiary functions for the pins 1.6 and 1.7 (IC2). In the manuals I find only mentioning about that pins have secondary and tertiary functions.

I am guessing that you are referring to the Family Guide document in this case. For the pin configuration information, you need to look into the device specific datasheet:

http://www.ti.com/lit/ds/symlink/msp430fr5739.pdf section "Port P1, P1.6 to P1.7, Input/Output With Schmitt Trigger" page 73.

0 JOHAN SANDGREN over 11 years ago in reply to Leo Hendrawan

Prodigy 30 points

Yes that's it Leo! Thanks (I already got that advice, but thanks anyway, for your effort to help! :-)

0 user1207215 over 9 years ago in reply to JOHAN SANDGREN

Prodigy 60 points

Hi Johan!

Did you manage to communicate with the MPU6050? Could you please share the code?

Thanks!

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FR5739 I2C communication documentation and hints