Problem with L6228 Stepper Circuit Mbed Micro

Hello i am building a stepper driver which is controlled my an Mbed microcontroller.

The Stepper driver is an L6228 form ST.
L6228 Datasheet

I have constructed the circuit as described in the datasheet.
How ever the motor will not step but in fact locks in position and makes a sound of pulsing. I am defiantly getting a pulse signal to the clock pin but still nothing

Here is my Mbed code


#include "mbed.h"

DigitalOut StepLED(LED1);
DigitalOut ResetLED (LED2);

DigitalOut Control (p20);
DigitalOut HalfFull (p21);
DigitalOut Clock (p22);
DigitalOut CWCCW (p23);
DigitalOut Enable (p24);
DigitalOut Reset (p25);



int main() {

//Configure IC////////
Control = 1;
HalfFull = 0;
CWCCW = 0;
Enable = 0;
//////////////////////

//Reset Stepper IC State Machine

Reset = 1;
ResetLED = 1;
wait (1);
Reset = 0;
Enable = 1;
ResetLED = 0;

////////////////////////////////

wait (5);
// Main loop
while(1) {

Clock = 1;
StepLED = 1;
wait(1);

Clock = 0;
StepLED = 0;
wait(1);
}
}



Has anyone had any experiences with these Drivers, or any advice on how to get the thing running.


Thanks

I have had a play with altering the current and managed to get some movement but its jerky and not going in a constant direction but back and forth. I have also managed to get an oscilloscope on the clock pin and all looks good.

If you getting some problem with mbed micro-controller then you have to take it to the manufacturer may be there is some problem in your mbed circuit.