This is a summary of the operations that are done to use the LIS3DH.

8-bit I2C address is 0x30.

To configure the device, put values in these two registers.
    Write to the CTRL_REG1 control register (0x20) a byte of 0x27:
	bits 7:4 (ODR3-ODR0) set to 0010 (Normal, 10Hz)
	bit 3 (LPen) = 0 (Normal power mode)
	bits 2:1 (Zen, Yen, Xen) set to 111 (enable all three axises)
    Write to the CTRL_REG4 control register (0x23) a byte of 0x88;
	bit 7 (BDU) set to 1 (block data update enabled)
	bit 6 (BLE) clear to 0 (LSB at lower address)
	bits 5:4 (FS1, FS0) clear to 0 (+/- 2G range)
	bit 3 (HR) set to 1 (high resolution enable)
	bits 2:1 (ST1, ST0) clear to 0 (self test disabled)
	bit 0 (SIM) clear to 0 (SPI mode = 4 wire)
	
To read results, first read one byte from the STATUS_REG (0x27).  If bit 3
(ZYXDA) is a zero there is no data to be read.  If it's a one then read six
bytes starting at register OUT_X_L (0x28).  This will read two bytes of data
for X, Y, and Z.
	0x28 = low 8-bits of X
	0x29 = high 8 bits of X
	0x2a = low 8-bits of Y
	0x2b = high 8 bits of Y
	0x2c = low 8-bits of Z
	0x2d = high 8 bits of Z