Using 68HC12, The following code in C has a serious flaw in the interrupt service routine, what is it? void interrupt 56 port_p_handler() { if ((PIFP & 0x03) == 0x03) { PORTB = PORTB | 0x04; } ms_...
Using 68HC12, The following code in C has a serious flaw in the
interrupt service routine, what is it?
void interrupt 56 port_p_handler() {
if ((PIFP & 0x03) == 0x03) {
PORTB = PORTB | 0x04;
}
ms_delay(20);
PIFP = PIFB | 0xFF;
}
Homework Answers
Wrong If statement -->if ((PIFP & 0x03) == 0x03)
Corrected If statement --> if ((PIFP & 0x03) ),This will set PIFP to 0X03 ,
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Using 68HC12, The following code in C has a serious flaw in the interrupt service routine, what is it? void interrupt 56 port_p_handler() { if ((PIFP & 0x03) == 0x03) { PORTB = PORTB | 0x04; } ms_...
Problem 3: Interrupt and Interrupts Handlers a) Can the phrases Interrupt Service Routine and Interrupt Handler be...
Problem 3: Interrupt and Interrupts Handlers a) Can the phrases Interrupt Service Routine and Interrupt Handler be used interchangeably? b) Laboratory Assignment 2 has two Interrupt Handlers, one for a pin on PortF and one for the System Timer. Please state what each interrupt's function is and what event would cause the interrupt to occur. c) Review Lab 2 and provide pseudo code or a flow diagram for the program,
Problem 3: Interrupt and Interrupts Handlers a) Can the phrases...
Consider the AVR statements in r20, 0x03 ori r20, 20 out 0x02, r20 Complete the following C statement so that it is equivalent to the code above. 420; PINA PORTA DDRA PINB PORTB DDRB PINC PORTC DDRC...
Consider the AVR statements in r20, 0x03 ori r20, 20 out 0x02, r20 Complete the following C statement so that it is equivalent to the code above. 420; PINA PORTA DDRA PINB PORTB DDRB PINC PORTC DDRC 16 1B 20 24 2 3
Consider the AVR statements in r20, 0x03 ori r20, 20 out 0x02, r20 Complete the following C statement so that it is equivalent to the code above. 420;
PINA PORTA DDRA PINB PORTB DDRB PINC PORTC DDRC...
A) Why is this code not reentrant? On what line would an interrupt haveto occur to...
A) Why is this code not reentrant? On what line would an
interrupt haveto occur to cause the bug to manifest? Please explain
your answer
B) How could you fix it so that it is reentrant? Please explain
your answer
9. During a driver's interrupt handling routine, once the interrupt has been acknowledgedit is possible for another interrupt to occur that will invoke the same handler. Drivers that produce correct results in this scenario are called reentrant. Consider the following...
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the routine? a. bset 1 b. push rO c. rjmp loop Od. sbis $16, 4 e...
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the routine? a. bset 1 b. push rO c. rjmp loop Od. sbis $16, 4 e. None of the above
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the routine? a. bset 1 b. push rO c. rjmp loop Od. sbis $16, 4 e. None of...
Could you please explain the answer besides simply giving it? The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at th...
Could you please explain the answer besides simply giving
it?
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the beginning of the routine? a. reti b. in temp, PIND c. rcall routine d.sts $123, r6 e. None of the above
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the beginning of the routine? a....
In a C program for a microcontroller, portb has been setup as all outputs and is...
In a C program for a microcontroller, portb has been setup as all outputs and is assigned the hexadecimal value 0xC6. Determine the voltage levels on the pins of portb. In the context of explaining the difference between the logical NOT operator(!) and the bitwise NOT operator(~) say what value portb will end up with in each of the following cases:- portb = ~ (0x45); portb = !(0x45); Determine the value on the portb pins after the following C code...
Does the Set-Up lines 54-58 require an interrupt service routine? No What is the duty cycle after initialization?...
Does the Set-Up lines 54-58 require an interrupt service
routine?
No
What is the duty cycle after initialization?
100% duty cycle
What type of waveform does OUTMOD_7 produce?
Reset/set waveform
Which mode is used with the counter?
Count up
Which clock signal is used with the counter?
CCR0, CCR
Which Timer is used in lines 54-58?
TA0X
I tried my best to answer them but tbh i could use the help to
understand even if they are right.
INO NTERRUFT...
What security flaw(s) might exist in the following C software? void chopUserInput( char *mon, char *day,...
What security flaw(s) might exist in the following C software? void chopUserInput( char *mon, char *day, char *input ) { char *m, *d; m = strtok( input, “/”); d = strtok( NULL, “/” ); strcpy( mon, m ); strcpy( day, d ); }
(c) 5 marks The code below was written as an interupt service routine for an analog...
(c) 5 marks The code below was written as an interupt service routine for an analog to digital conversion for the ATmega328. Its purpose is to read the conversion result, copy it to an internal stack and to start a new conversion. It does not work corectly as there are five mistakes. Make changes to the code to correct its behaviour Note: Apartial instruction set summary for the AVR MCUS is available at the end of the exam script AtoDService...
Code using Java What is an interface? Complete the following code: interface IExample{ public void print();...
Code using Java What is an interface? Complete the following code: interface IExample{ public void print(); } class Example1 implements IExample{ . . . } // Driver class public class Questions { public static void main(String[] args) { . . . } } To have this message when you execute it: Implementation of an interface
Problem 3: Interrupt and Interrupts Handlers a) Can the phrases Interrupt Service Routine and Interrupt Handler be used interchangeably? b) Laboratory Assignment 2 has two Interrupt Handlers, one for a pin on PortF and one for the System Timer. Please state what each interrupt's function is and what event would cause the interrupt to occur. c) Review Lab 2 and provide pseudo code or a flow diagram for the program,
Problem 3: Interrupt and Interrupts Handlers a) Can the phrases...
Consider the AVR statements in r20, 0x03 ori r20, 20 out 0x02, r20 Complete the following C statement so that it is equivalent to the code above. 420; PINA PORTA DDRA PINB PORTB DDRB PINC PORTC DDRC 16 1B 20 24 2 3
Consider the AVR statements in r20, 0x03 ori r20, 20 out 0x02, r20 Complete the following C statement so that it is equivalent to the code above. 420;
PINA PORTA DDRA PINB PORTB DDRB PINC PORTC DDRC...
A) Why is this code not reentrant? On what line would an
interrupt haveto occur to cause the bug to manifest? Please explain
your answer
B) How could you fix it so that it is reentrant? Please explain
your answer
9. During a driver's interrupt handling routine, once the interrupt has been acknowledgedit is possible for another interrupt to occur that will invoke the same handler. Drivers that produce correct results in this scenario are called reentrant. Consider the following...
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the routine? a. bset 1 b. push rO c. rjmp loop Od. sbis $16, 4 e. None of the above
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the routine? a. bset 1 b. push rO c. rjmp loop Od. sbis $16, 4 e. None of...
Could you please explain the answer besides simply giving
it?
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the beginning of the routine? a. reti b. in temp, PIND c. rcall routine d.sts $123, r6 e. None of the above
The use of which of the following AVR instructions within an interrupt service routine would necessitate saving the status register at the beginning of the routine? a....
Does the Set-Up lines 54-58 require an interrupt service
routine?
No
What is the duty cycle after initialization?
100% duty cycle
What type of waveform does OUTMOD_7 produce?
Reset/set waveform
Which mode is used with the counter?
Count up
Which clock signal is used with the counter?
CCR0, CCR
Which Timer is used in lines 54-58?
TA0X
I tried my best to answer them but tbh i could use the help to
understand even if they are right.
INO NTERRUFT...
(c) 5 marks The code below was written as an interupt service routine for an analog to digital conversion for the ATmega328. Its purpose is to read the conversion result, copy it to an internal stack and to start a new conversion. It does not work corectly as there are five mistakes. Make changes to the code to correct its behaviour Note: Apartial instruction set summary for the AVR MCUS is available at the end of the exam script AtoDService...
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