Find all Feetech URT1 servo serial busses. This function uses
/sys/bus/usb/devices to find the USB devices, and then derive the corresponding
/dev/ttyUSB* port.
Decode Feetech current register value to current in amperes.
Decode Feetech load register value to load fraction (0..1).
Decode Feetech offset register value to offset in radians.
Decode Feetech position register value to position in radians.
Decode Feetech speed register value to speed in radians per second.
Decode Feetech temperature register value to temperature in degrees Celsius.
Decode Feetech voltage register value to voltage in volts.
Encode acceleration to Feetech acceleration register value.
Encode load fraction (0..1) to Feetech load register value.
Encode offset to Feetech offset register value.
Encode position to Feetech position register value. Note that we always shift the position by 2048 to encode the range as -pi..pi, rather than 0..2pi.
Encode speed to Feetech speed register value.
Encode temperature to Feetech temperature register value.
Encode voltage to Feetech voltage register value.