powerstep01

An arm cortex-M0 MCU is adopted to drive the powetstep01.

The initialization of SPI is done including CS, SDO, SDI, CK,BUSY, STBY.

Here is the problem, I want the step motor run, so I write this:

CS=low;//chip select

SPI1_TX0 = param;//param=0xFF50, since the address of the run command is 0101000DIR, and FF represents speed

SPI1_CNTRL |= GO_BUSY;//start the transmit

delay;

CS=high;

The powerstep01 did not work. Is this the right way?

Or what else should be done  before sending commands(SPI has been initialized already)?

Thank you very much!