LSM6DSL msp430 driver and debugging process

littleshrimp

LSM6DSL msp430 driver and debugging process [Copy link]

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sans-serif]Using an oscilloscope to view the waveform, I found that the register address written after sending the device address was not pulled up. I began to suspect that the pull-up resistor had poor contact. Configuring an internal pull-up in the microcontroller did not solve the problem.

Failed to write address

Later, I thought that it was probably because the LSM6DSL always output 0 and the external pull-up resistor of the MCU failed to pull it up.

I checked the device address sent, and the last bit was 1, which is the read address. The LSM6DSL will become the output mode, and of course the 0x0F of the who am i address cannot be written in.

I looked at the address in the driver and found that 0xD5 corresponds to the read address, but the code in the MSP430 only changes the write code to read (the last position is 1) but does not change the read address to write (the last position is 0)

The problem was later solved by changing the address to 0xD4

Write address successfully

Read data successfully

2.msp430fr5969 soft i2c lsm6dsl.rar (1.4 MB, downloads: 104)

2018-7-26 23:19 上传

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lising

Really useful information, I’ve learned a lot.

bilere

good

a217zxg

The zero drift of the angular velocity reading is quite small, which is not easy.

@羁绊nnn

Thanks for sharing!!!