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Aceinna / docs_aceinna-dmu380

OpenIMU Documentation Repository
https://openimu.readthedocs.io/en/latest/
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Gauss factor, temp formula, and t_delay unit need confirmation in SPI part #26

Open erkuo521 opened 4 years ago

erkuo521 commented 4 years ago

  1. the factor value in "Note 3: Magnetometer sensors scale is 16354 LSB/Gauss" should be 16384, pls double check.

  2. the formula of temperature in "Note 4: Temperature sensors data conversion:" should be marked different formula for 330 or 300: Note 4: Temperature sensors data conversion: 300: Temp = sensor reading 330: Temp = sensor reading * 0.073111172849435 + 31  pls double check.

  3. one unit in table 12 of SPI should be uSec not nSec: tDELAY Time between successiveclock cycles 9 (min) 16 nSec

  4. in "Table 6. OpenIMU Digital filter choices", the value is 0x04 (4) if 20 Hz bartlett, but SPI actual read values from 300/330 are 0x40: maybe exist mistake in our FW 0x38: 0x4000 0x78: 0x4000

5.We should add : • Data transferred in 16-bit word-length and MSB-first • fCLK ≤ 2.0 MHz • CPOL = 1 (clock polarity) and CPHA = 1 (clock phase)

thanks a lot.

erkuo521 commented 4 years ago

scale factor and range are differences between different Apps, we should keep same for all apps: image