I wrote a short shell script to repeatedly take the raw output from one of the accelerometers (/sys/devices/platform/spi_s3c24xx_gpio.1/spi0.1/dump) and massage the data to output X,Y,and Z-axis readings in decimal, -128 to 128.
With my Freerunner sitting flat, face up, on the concrete slab of my house, the 'Z' reading (positive Z is toward the back of the handset, BTW) fluctuates between 51 and 56. (X and Y range from -1 to 2) That's a variance of +/- 5%, and I'm fairly confident gravity isn't fluctuating significantly... ;) Is that to be expected, is my Freerunner defective, or am I doing something wrong? I'm trying to develop a simple tool that will determine 'down' based on output from the accelerometer, and indicate deviations from various 90-degree orientations - will I need to massage the data further to ignore variations, should I be averaging several readings, or what? j _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
