IWR6843: I2C communication error with SDKv3.6 I2C driver

Takatoshi Tsuji

Expert 1550 points

Part Number: IWR6843
Other Parts Discussed in Thread: MMWAVEICBOOST, ,

Dear support team,

I2C communication error is observed with SDKv3.6 I2C driver.

- HW : MMWAVEICBOOST + IWR6843ISK-ODS

I2C master = external MCU, I2C slave = IWR6843

- Symptom : No ACK is returned to master. Also, there is no reaction on I2CSlave_read() and I2CSlave_write() by monitoring with JTAG debugger.

Slave address is set up with 0x65(7bit), by referring slave.c in SDKv3.6 I2C driver ;

　 I2CSlave_Params_init(&i2cParams);

i2cParams.transferMode = I2CSLAVE_MODE_BLOCKING;

i2cParams.slaveAddress = 0x65;

i2cHandle = I2CSlave_open(0, &i2cParams);

We are afraid slave address may not be correctly set up. Please kindly let us know how to resolve this issue.

Best regards,

Taka

over 3 years ago

0 Pedrhom Nafisi over 3 years ago

TI__Mastermind 22987 points

Hello,

Attached is some sample code that includes changes done to add I2C to the main.c of our main demo: Out of Box demo. Feel free to compare and contrast your changes with the one's we have in order to ascertain your issue.

mss_main-orig.c

4760.mss_main.c

Best Regards,

Pedrhom Nafisi

0 Takatoshi Tsuji over 3 years ago in reply to Pedrhom Nafisi

Expert 1550 points

Hello Pedrhom,

Thank you for your message. It seems that the sample codes you provided are used for communicating with PMIC as 6843 = master.

But we need sample code as 6843 = slave. We are fine if you can provide such sample code.

Best regards,

Taka

0 Pedrhom Nafisi over 3 years ago in reply to Takatoshi Tsuji

TI__Mastermind 22987 points

Hello Taka,

Below you can find an example of a I2C slave driver implementation.

6843-i2c-slave.zip

Best Regards,

Pedrhom Nafisi

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IWR6843: I2C communication error with SDKv3.6 I2C driver