| Note: The
switches and the LEDs are numbered 7 6 5 4 3 2 1 0 |
| void main (void) { unsigned char x; InitPorts(); //---------------------------------- while (1==1) { //|||||||||||||||||||||||||||| MAIN LOOP ||||||||||||||||||||||| x = SWITCHES & 0b00111100; LEDS = x; //||||||||||||||||||||||| END OF MAIN LOOP ||||||||||||||||||| } } 1. If all the switches are on, which LEDs are on? Circle the ones that are on: 7 6 5 4 3 2 1 0 2. If the switches contain 11001001, which LEDs are on? Circle the ones that are on: 7 6 5 4 3 2 1 0 |
| void main (void) { unsigned char x; x = 0; InitPorts(); //---------------------------------- while (1==1) { //|||||||||||||||||||||||||||| MAIN LOOP ||||||||||||||||||||||| LEDS = 0; //Turn off all LEDs x = SWITCHES & 0b00000111; if (SW3==1) LED0 = 1; if (x > 0) LED1 = 1; if (x == 0) LED2 = 1; //||||||||||||||||||||||||| END OF MAIN LOOP ||||||||||||||||| } } 3. If all the switches are off, which LEDs are on? ___________ 4. If only switch 3 is on, which LEDs are on? __________ 5. If only switch 0 is on, which LEDs are on? __________ |
| void main (void) { unsigned char x; x = 0; InitPorts(); //---------------------------------- while (1==1) { //|||||||||||||||||||||||||||| MAIN LOOP |||||||||||||||||||||| if (PBdl()==1) //PBdl returns a 1 if a leading edge has been detected. x = x + 1; DispFP(x, 0); //||||||||||||||||||||||||| END OF MAIN LOOP |||||||||||||||| } } 6. If the pushbutton is pressed 5 times, what number will be displayed? _________ 7. From a fresh start, if the pushbutton is pressed and remains held down for several seconds, what will be displayed? a. The display will rapidly count up, starting at zero. b. 0 will be displayed. c. 1 will be displayed. d. 2 will be displayed. |
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| #include
"s215-header13.h" unsigned char Mult(unsigned char x, unsigned char y); #pragma code //||||||||||||||||||||| BEGINNING OF MAIN PROGRAM ||||||||||||| void main (void) { unsigned char a, b, c, x, y; x = 0; InitPorts(); //---------------------------------- while (1==1) { //|||||||||||||||||||||||||||| MAIN LOOP ||||||||||||||||||||| x = SWITCHES; y = 2; a = 3; b = 4; c = Mult(a, b); DispFP(c, 0); //||||||||||||||||||||||||| END OF MAIN LOOP ||||||||||||||| } } //||||||||||||||||||||||| END OF MAIN PROGRAM |||||||||||||| unsigned char Mult(unsigned char x, unsigned char y) { unsigned char z; z = x * y; return z; } Note: There is a trick or two in the following questions. 8. If 00000101 is put into the switches, what number will be displayed? _________ 9. If 00000011 is put into the switches, what number will be displayed? _________ |