I am using MSP430F5529 and the DRV8711 booster pack trying to drive a stepper motor.
At first, I was using a large 2A/phase stepper motor and I kept getting over current shutdown on channel A (checked the STATUS register).
So, I shifted to a smaller stepper motor for testing whats wrong, and even with a lower current motor I keep getting over current shut down.
It seems like motor moves one step and then immediately shuts down.
here are my register settings:
//CTRL Register defaults
unsigned char CTRLdataHi, CTRLdataLo;
CTRLdataHi = 0x0C;
CTRLdataLo = 0x07;
WriteSPI(CTRLdataHi, CTRLdataLo);
//TORQUE defaults
unsigned char TORQUEHi, TORQUELo;
TORQUEHi = 0x17;
TORQUELo = 0xFF;
WriteSPI(TORQUEHi, TORQUELo);
//OFF defaults
unsigned char OFFHi, OFFLo;
OFFHi = 0x21;
OFFLo = 0x30;
WriteSPI(OFFHi, OFFLo);
//BLANK defaults
unsigned char BLNKHi, BLNKLo;
BLNKHi = 0x31;
BLNKLo = 0xFF;
WriteSPI(BLNKHi, BLNKLo);
//DECAY defaults
unsigned char DECAYHi, DECAYLo;
DECAYHi = 0x41;
DECAYLo = 0x10;
WriteSPI(DECAYHi, DECAYLo);
//STALL defaults
unsigned char STALLHi, STALLLo;
STALLHi = 0x53;
STALLLo = 0x40;
WriteSPI(STALLHi, STALLLo);
//DRIVE defaults
unsigned char DRIVEHi, DRIVELo;
DRIVEHi = 0x60;
DRIVELo = 0x0F;
WriteSPI(DRIVEHi, DRIVELo);
//STATUS defaults
unsigned char STATUSHi, STATUSLo;
STATUSHi = 0x70;
STATUSLo = 0x00;
WriteSPI(STATUSHi, STATUSLo);
What am I doing wrong? I have tried changing a lot of register settings, trying combinations and stuff, but still no luck. HELP!!!
EDIT: I have kept the nSLEEP pin high and RESET pin low. I toggle the STP pin on the booster pack to step through the sequence.
