below 1s usedtomonitor the status of a switch, whichis connected toport Apn / The c-code The stepper motor uses the full 4-step sequence, 13, if switch SW = 0, the stepper motor moves ? A and if switch SW 10, the stepper motor moves? #include chce12.h> #define sw PORTA BIT7 oid MSDelay (unsigned int ms) void main() //PD7 as input pin //PORTB as output DDRA 0x7F DDRB-OxFF while (1) PORTB 0x66; MSDelay (100) PORTB0xCC MSDelay (100) PORTB 0x99; MSDelay (100) PORTB0x33 MSDelay (100): else PORTB 0x66 MSDelay (300) PORTB 0x33 MSDelay (100) PORTB0x99 MSDelay (100) PORTB OxCC: MSDelay (100) void MsDelay (unsigned int val ue) unsigned int x, yi for (x-0 xc1275;x++) for (y-0;y