Compiler/MSP430G2553: I2c Problem using Energia

sagar shah54

Expert 2125 points

Part Number: MSP430G2553
Other Parts Discussed in Thread: ENERGIA,

Tool/software: TI C/C++ Compiler

Hello,

I have a question regarding using Arduino ode on Energia.

I am trying to use the sample code from Single tact which is in Arduino in MSP430 using Energia.

I am using P1_7 as SDA abd P1_6 as SCL. I am not able to use I2C communication?

Is there any modification required for using it in Energia?

over 7 years ago

0 Caleb Overbay over 7 years ago

TI__Genius 15370 points

Hi Sagar,

Do you have the appropriate pull-up resistors on the I2C lines? Also, P1.6 is connected to LED2 on the MSP430G2553 LaunchPad via a jumper. You'll need to remove this jumper for I2C communication to work properly.

Best regards,
Caleb Overbay

0 sagar shah54 over 7 years ago in reply to Caleb Overbay

Expert 2125 points

I have 4.7kohm resistors. Is it too high?
and I do have Jumpers removed at P1.6.

The code was Arduino but I added Wire.setModule(0); to work in MSP430.
Do you think if I am missing out on anything?

Thanks

0 Caleb Overbay over 7 years ago in reply to sagar shah54

TI__Genius 15370 points

Sagar,

I'm not an Arduino expert so I can't be sure that the code you wrote for the Arduino will port well to the MSP430G2553 using Energia. The pull-up resistor values you've chosen should be ok.

I would recommend checking out this similar E2E post and see if it helps you:
e2e.ti.com/.../529036

Best regards,
Caleb Overbay

0 Caleb Overbay over 7 years ago in reply to sagar shah54

TI__Genius 15370 points

Hi Sagar,

Were you able to solve the issue you were experiencing. If so, can you please update this post with the solution for others who may experience a similar issue.

Best regards,
Caleb Overbay

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Compiler/MSP430G2553: I2c Problem using Energia