Question
Hello, I am using three L9942XP1TR driver ic for controlling three stepper motor.
The spi communication is interfaced to driver ic from raspberry pi(.Interfaced with raspberry pi using I2C for my project.The 3 gpio pins MCP23017(pin8,21,22) drives the enable pin of 3 l9942xp1tr(U3,U4,U5).Please refer image.While programming, after some time the enable pins get short.Also the motors not working properly.Please clarify why this is happening? 
