Question

In: Computer Science

14.6 A- Fill in the Blanks for the required C instructions, and also fill in the...

14.6 A- Fill in the Blanks for the required C instructions, and also fill in the missing comments

/*******************************************************************

This program outputs 30 kHz square wave on

port T, bit-0 using timer channel 0 interrupts and the

output compare bit operations.

*******************************************************************/

#include <mc9s12c32.h> /* derivative information */

#define HALF_P 133 /* Number clocks per 1/2 period */

/******************************************************************/ void interrupt 8 OC0_isr (void);

/******************************************************************/ void main(void) {

/******************************************************************/

/* Initialize I/O */

___________________ = 1; /* Enable the timer */

/*which Register, Which Flag bit */

TIOS_IOS0 = _________; /* Enable output compare channel 0 */

/* Set up TC0 */

_________________ = TCNT;

/* Now have ~ 8 ms to set up the system without an interrupt */

TFLG1 = TFLG1_C0F_MASK;/* Clear C0F flag */

__________________ = 1; /* Enable the interrupt */

/* Set up the output compare action to toggle

* port T, bit-0. (DDRT does not need to be set.)

*/

TCTL2_OM0 = 0;

TCTL2_OL0 = 1;

EnableInterrupts; /* Unmask interrupts */

/* DO */

for(;;) {

}

/* FOREVER */

}

/******************************************************************* * The interrupt service routine simply sets up the TC0

* for the next interrupt time.

*******************************************************************/ void interrupt 8 OC0_isr ( void ){

/******************************************************************/

/* Set up TC0, How? Need to add what Register? */

TC0 += _______________________;

TFLG1 = TFLG1_C0F_MASK; /* ______________________________________ */

}

Expert Solution

#include <mc9s12c32.h> /* derivative information */

#define HALF_P 133 /* Number clocks per 1/2 period */

/******************************************************************/ void interrupt 8 OC0_isr(void);

/******************************************************************/ void main(void) {

/******************************************************************/

/* Initialize I/O */

______TSCR1_____________ = 1; /* Enable the timer */

/*which Register, Which Flag bit */

TIOS_IOS0 = _____0x00____; /* Enable output compare channel 0 */

/* Set up TC0 */

______________TC5___ = TCNT;

/* Now have ~ 8 ms to set up the system without an interrupt */

TFLG1 = TFLG1_C0F_MASK;/* Clear C0F flag */

_______________TIE___ = 1; /* Enable the interrupt */

/* Set up the output compare action to toggle

* port T, bit-0. (DDRT does not need to be set.)

*/

TCTL2_OM0 = 0;

TCTL2_OL0 = 1;

EnableInterrupts; /* Unmask interrupts */

/* DO */

for(;;) {

}

/* FOREVER */

}

/******************************************************************* * The interrupt service routine simply sets up the TC0

* for the next interrupt time.

*******************************************************************/ void interrupt 8 OC0_isr( void ){

/******************************************************************/

/* Set up TC0, How? Need to add what Register? */

TC0 += _________________HiCnt______;

TFLG1 = TFLG1_C0F_MASK; /* ______Clear COF flag________________________________ */

}

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