MPU9150 no mag output when LPF is turned off

By emmanuelsantiago , 3 July 2014
Forums
SmartMotion® MEMS Motion Sensors

Hi,

Is anybody else experiencing the problem that if they set the digital low-pass filter to be either 256Hz or 2100Hz (i.e. no LPF) that the mag channel stops functioning? The "get_compas_reg" function fails at the "AKM_DATA_READY" check. I don't know how they're related. I'm using eMPL 5.1 with the MPU9150.

Thanks,
Mark

guy_mcilroy

11 years 8 months ago

In order to bypass DLPF, bit number 0 of register number 27 should be set to 1. Bypassing DLPF should not disturb the magnetometer values as magnetometer values are being read from special gyro registers.

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