Question

d) The following C program is used to send a byte of data serially through pin 3 of Port C. [1, 3 pts] i. How is the data sent out? LSB or MSB first? ii. Rewrite the program such that it sends out the data from the opposite end. #include <avr/io.h> #define serPin 3 int main(void) { unsigned char conbyte = 0x44; unsigned char regA; unsigned char x; regA = conbyte; DDRC |= (1<<serPin); for (x=0;x<8;x++) { if (regA & 0x01) PORTC |= (1<<serPin); else PORTC &= ~(1<<serPin); regA = regA >> 1; } return 0; }

          d) The following C program is used to send a byte of data serially through pin 3 of Port
C.
[1, 3 pts]
i. How is the data sent out? LSB or MSB
first?
ii. Rewrite the program such that it
sends out the data from the opposite
end.
#include <avr/io.h>
#define serPin 3
int main(void)
{
unsigned char conbyte = 0x44;
unsigned char regA;
unsigned char x;
regA = conbyte;
DDRC |= (1<<serPin);
for (x=0;x<8;x++)
{
if (regA & 0x01)
PORTC |= (1<<serPin);
else
PORTC &= ~(1<<serPin);
regA = regA >> 1;
}
return 0;
}

d) The following C program is used to send a byte of data serially through pin 3 of Port
C.
[1, 3 pts]
i. How is the data sent out? LSB or MSB
first?
ii. Rewrite the program such that it
sends out the data from the opposite
end.
#include <avr/io.h>
#define serPin 3
int main(void)

unsigned char conbyte = 0x44;
unsigned char regA;
unsigned char x;
regA = conbyte;
DDRC |= (1<<serPin);
for (x=0;x<8;x++)

if (regA 0x01)
PORTC |= (1<<serPin);
else
PORTC = (1<<serPin);
regA = regA >> 1;

return 0;

Added by James F.

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