Utilize Switch of the explorer 16 board to change the direction of the Knight Rider Pattern using the code. Any time, if Switch is pushed down and hold, the above pattern starts from LEFT to RIGHT and when Switch is released, the pattern walks from RIGHT to LEFT.
Code:
int main(void)
{
// initialize the device
SYSTEM_Initialize();
while (1){
LATA = 0x00;
int i;
int j;
// Right to Left sequence
for(i=0; i<8; i++) {
LATA |= (1 << i);
delayFunc();
}
LATA = 0x00;
for(j=7; j>=-1; j--) {
LATA |= (1<<j);
delayFunc();
}
}
return -1;
}
void delayFunc(void)
{
int j,k;
int a;
for(j = 0; j < count1; j++)
{
for(k=0; k < count2; k++)
{
a = 0;
}
}
}
To utilize the switch on the Explorer 16 board to change the direction of the Knight Rider pattern, you will need to modify the code as follows:
1. Add a variable to track the state of the switch:
```c
int switchState = 0;
```
2. Inside the while loop, check the state of the switch and update the switchState variable:
```c
if (SWITCH_Get() == 0) {
// Switch is pushed down
switchState = 1;
} else {
// Switch is released
switchState = 0;
}
```
3. Modify the for loops to use the switchState variable to determine the direction of the pattern:
```c
if (switchState == 0) {
// LEFT to RIGHT sequence
for(i=0; i<8; i++) {
LATA |= (1 << i);
delayFunc();
}
LATA = 0x00;
for(j=7; j>=-1; j--) {
LATA |= (1<<j);
delayFunc();
}
} else {
// RIGHT to LEFT sequence
for(j=7; j>=-1; j--) {
LATA |= (1<<j);
delayFunc();
}
LATA = 0x00;
for(i=0; i<8; i++) {
LATA |= (1 << i);
delayFunc();
}
}
```
The updated code will now change the direction of the Knight Rider pattern based on the state of the switch.
Can you make the code simpler?
Certainly! Here's a simplified version of the code:
```c
int main(void)
{
// Initialize the device
SYSTEM_Initialize();
int direction = 1; // 1 for left to right, -1 for right to left
while (1)
{
LATA = 0x00;
// Loop through the pattern based on direction
if (direction == 1) {
for (int i = 0; i < 8; i++) {
LATA |= (1 << i);
delayFunc();
}
direction = -1;
} else {
for (int i = 7; i >= 0; i--) {
LATA |= (1 << i);
delayFunc();
}
direction = 1;
}
}
return -1;
}
void delayFunc(void)
{
for (int j = 0; j < count1; j++) {
for (int k = 0; k < count2; k++) {
// No operation
}
}
}
```
In this simplified version, we use a single `direction` variable to track whether the pattern is moving from left to right or right to left. The code inside the while loop checks the current direction and updates it accordingly after each iteration. This eliminates the need for the switch and the conditional statements based on its state.
To utilize the switch on the Explorer 16 board to change the direction of the Knight Rider pattern, you will need to modify the existing code.
Here's an updated version of the code that incorporates the switch functionality:
```c
#include <xc.h>
// Function prototypes
void SYSTEM_Initialize(void);
void delayFunc(void);
int main(void)
{
// Initialize the device
SYSTEM_Initialize();
while (1) {
// Check the state of the switch
if (PORTBbits.RB0 == 0) {
// Switch is pressed, pattern starts from LEFT to RIGHT
LATA = 0x00;
int i;
// Left to Right sequence
for (i = 0; i < 8; i++) {
LATA |= (1 << i);
delayFunc();
}
} else {
// Switch is not pressed, pattern walks from RIGHT to LEFT
LATA = 0x00;
int j;
// Right to Left sequence
for (j = 7; j >= 0; j--) {
LATA |= (1 << j);
delayFunc();
}
}
}
return -1;
}
void delayFunc(void)
{
// This function should implement a delay mechanism
// Adjust the count1 and count2 values as needed for your desired delay duration
int count1 = 1000;
int count2 = 1000;
int j, k, a;
for (j = 0; j < count1; j++) {
for (k = 0; k < count2; k++) {
a = 0;
}
}
}
void SYSTEM_Initialize(void) {
// Set the switch as input (RB0)
TRISBbits.TRISB0 = 1;
// Set all pins of PORTA as output
TRISA = 0x00;
// Initialize PORTA to 0
LATA = 0x00;
}
```
In this code, we have added a check for the state of the switch (connected to RB0) using `PORTBbits.RB0`. If the switch is pressed (logic low), the pattern will start from left to right. Otherwise, if the switch is not pressed (logic high), the pattern will walk from right to left.
Make sure to adjust the `count1` and `count2` variables in the `delayFunc()` function according to your desired delay duration.
To utilize the switch on the Explorer 16 board to change the direction of the Knight Rider pattern in the code you provided, you can follow these steps:
1. First, you need to modify the code to read the state of the switch. The Explorer 16 board usually has a switch connected to a specific pin, so you should check the pin connection in the board documentation or schematic.
2. Once you have identified the pin connected to the switch, you can use a digital input function to read its state. In this case, let's assume the switch is connected to pin RB0. You can add the following code at the beginning of the main function to read the switch state:
```c
#include <stdbool.h>
bool switchState = false;
int main(void)
{
// initialize the device
SYSTEM_Initialize();
while (1) {
// Read the state of the switch
switchState = PORTBbits.RB0;
// Rest of the code ...
}
return -1;
}
```
3. After reading the switch state, you can use an if statement to determine the direction of your Knight Rider pattern.
```c
int main(void)
{
// ...
while (1) {
switchState = PORTBbits.RB0;
LATA = 0x00;
int i;
int j;
// Check the state of the switch
if (switchState) {
// Switch pushed down (LEFT to RIGHT direction)
// Left to Right sequence
for(i=0; i<8; i++) {
LATA |= (1 << i);
delayFunc();
}
} else {
// Switch released (RIGHT to LEFT direction)
// Right to Left sequence
for(j=7; j>=-1; j--) {
LATA |= (1<<j);
delayFunc();
}
}
}
return -1;
}
```
With this modification, the pattern will move from left to right when the switch is pushed down and held, and it will move from right to left when the switch is released.