MSP430FR2522: i2c protocol eusci driver interrupt

Hi Samuelr,

Here are some code examples in Resource Explorer on using I2C in the MSP430FR2522. You can also find a zip of the code examples on the FR2522 product page under the "Design & Development" tab under "Software development".

Thanks,

Urica Wang

Thanks, but this is the example provided in the CCS. The problem is that the example is not encountering both writing and reading, simplifying too much the i2c driver. I also see that there are the eusci_b drivers from ccs, but they are not using the interrupts.

Thank you Urica, 

I have another question. Do you have any suggestions to build up a fail-safe layer on I2C? we are encountering difficulties because it seems that our I2C communication is very disturbed and we want to write a firmware layer on top of the I2C driver provided to prevent any block and send data. 

Thanks 

Samuele 

This is really a new question (deserving of a new thread), but some suggestions:

1) If at all possible, design-in a reset capability for the slave.

If the slave has a Reset pin, that's handy, but my experience is that few I2C devices provide this. 

When I can (which is actually most of the time) I power the slave from a GPIO pin, so I have heavy-hammer control from my program.

2) The EUSCI UCCLTO feature is more limited, but does provide something.

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/869750/msp430fr2433-i2c-clock-low-timeout-interrupt

3) TI publishes an MSP430 serial port troubleshooting guide, but I can never seem to find it when I look for it. [Urica?]

Hi Bruce, Samuele,

I found this guide, https://www.ti.com/lit/slaa734, for solutions to common serial communication issues on MSP devices that contains tips on implementing I2C.

Thanks,

Urica Wang

Dear Urica, 

can you send me that? 

Thanks. 

Samuele 

Hi Samuele,

See the edited reply above, I've added the hyperlink.

Thanks,

Urica Wang