We are trying to set up a L6472 for step mode control using the STCK pin with limited success.
Here is our setup of the registers.
CONFIG: 0xFE80
Status: 0xFE02
STEP_MODE: 0x1C
We are trying to drive the STCK pin with 3.3V LVTTL from a PIC32 at 1250 Hz.
The motor does not turn but does wiggle a little bit. There is also a loss of torque when pulsing the STCK pin. If we try to control the motor with SPI movement commands, the motor moves as expected.
The ABS_POS register is updating when we drive the STCK pin. Also, after we have pulsed the STCK pin we can send an SPI command and cause the motor to move back to the expected position. So if we send 10,000 pulses to the STCK pin the motor doesn’t move but when command to go to position 0 it moves 10,000 steps.
