RTOS/CC1310: Not able to Read who_am_i register in sensor controller Studio for LIS2DH12TR

Have you compared the output on the I2C bus and checked the difference between the CCS and SCS code?

you mean through the Logic Analyzer ?
If so we don't have analyzer.

Meaning that you are developing code without access to a scope or a logic analyzer?

See if this one is relevant: e2e.ti.com/.../2574322

- Yes.

- We have looked into that example and tried but doesn't seem to be reading who_am_i reg. value.

Hi TER,
Any updates on this?

The example I linked to highlight that the slave address is not given in the same was in SCE as in CCS. Did you check this?

I would highly advice to get hold of a logic analyzer since that will save you a lot of time.

Hi TER,

- Yeah it has to be left shifted once right ?

- I tried connecting another sensor(MPU6050) to custom Board using GPIO(0&1) It's able to read the data.

- But on the LIS2DH12TR am not even able to read the who_am_i reg value in SCS(It is working in CCS).

This is what am doing : Any ways debug without analyzer.

i2cStart();
i2cTx(I2C_OP_WRITE | (Accel_I2C_ADDR << 1)); //0x19h Slave Address
i2cTx(who_reg);
i2cRepeatedStart();
i2cStop();

i2cStart();
i2cTx(I2C_OP_READ | (Accel_I2C_ADDR << 1)); // 0x0F who_am_i register address 
i2cRxAck(output.who);
i2cStop();

When you test with MPU6050 and LIS2DH12TR , do you run code from SCS and using the same DIOs in both cases?

Yes I run both from SCS but not same DIO.
For LIS2DH12TR I'm using DIO 2&3 which integrated.
For MPU6050 : I'm using DIO 0&1 (External)

What do you mean by internal/ external? If you are talking about the pull-up resistors used for I2C I would advice to always use external since the variation in the internal is fairly large. Have you tried to connect LIS2DH12TR to DIO0/1?

- I said LIS2DH12TR is integrated with CC1310 in my custom Board.I have 4.7K pull-up resistor on my custom board for i2c.
- I use external break-out board for MPU6050(which is GY521) which has 4.7K pull-up resistor.
- No i'll not be able to connect LIS2DH12TR to DIO0/1 since it's a integrated with CC1310 in my custom board.

Could you please update on this?