Led not working on Explorer 16. why this not working?
unsigned int count1 = 200;
unsigned int count2 = 200;
bool toggleDirection = true;
bool pressed = false;
void main(void) {
while (1)
{
bool sw = PORTDbits.RD6;
if( toggleDirection ) {
LATA <<= 1;
}
else {
LATA >>= 1;
}
if( LATA == 0x80 ) toggleDirection = false;
if( LATA == 0x01 ) toggleDirection = true;
if( !sw ) {
if( !pressed ) {
if( toggleDirection ){
toggleDirection = false;
LATA = 0x80;
}
else {
toggleDirection = true;
LATA = 0x01;
}
pressed = true;
}
}
else {
pressed = false;
}
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;
}
}
}
Based on the code provided, it seems like the LED control is done using the LATA register and the state of RD6 pin. The LED should toggle its direction based on the value of the "toggleDirection" variable.
There could be several reasons why the LED is not working:
1. Wiring issue: Check if the LED is properly connected to the pin controlled by the LATA register. Make sure there are no loose connections.
2. Incorrect pin configuration: Verify that the pin assignments for the LED control are correct. Ensure that RD6 is connected to the switch and LATA is connected to the LED.
3. Compiler optimization: If the code is not compiled with optimization disabled, the compiler may optimize out the LED control code. Check the compiler settings and disable any optimization flags.
4. Timing issue: The delayFunc function is used to create a delay between LED state changes. Verify that the delay values in "count1" and "count2" are reasonable for producing a visible delay. Try increasing the values to see if the LED starts working.
5. Faulty components: It's possible that the LED or the microcontroller itself is damaged. Try using a different LED or test the microcontroller with a simple blinking LED program to confirm if it's functioning correctly.
6. Check the power supply: Ensure that the Explorer 16 board is properly powered and providing enough voltage for the LED to turn on.
By checking and troubleshooting the above possibilities, you should be able to identify the root cause of the LED not working issue.
There could be several reasons why the LED is not working on the Explorer 16 board. Here are a few things you can check:
1. Check the wiring: Make sure that the LED is properly connected to the correct pin on the board.
2. Check the code: Verify that the code is correct and that it is correctly configuring the necessary registers to control the LED. In this case, it seems that the code is using the variable "LATA" to control the LED. Make sure that this variable corresponds to the correct pin on the board.
3. Check the delays: The code includes a delay function called "delayFunc". Verify that the values of "count1" and "count2" are appropriate for the desired delay time. You may need to adjust these values to achieve the desired delay.
4. Check the switch: The code includes a switch check using "PORTDbits.RD6". Make sure that the switch is connected properly and that it is functioning correctly. You can also try manually toggling the switch to see if it affects the LED.
5. Check the power supply: Ensure that the board is properly powered and that there are no issues with the power supply.
By checking these aspects, you should be able to troubleshoot why the LED is not working on the Explorer 16 board.
The code you provided is for a program that controls an LED on the Explorer 16 development board. The LED is connected to Port A of the microcontroller.
To troubleshoot the issue and understand why the LED is not working, we need to analyze the code and check for potential problems.
1. Check if the LED is properly connected: Make sure that the LED is connected to the correct pin on the development board (Port A). Double-check the connections to ensure there are no loose or faulty connections.
2. Check the code logic: Review the code logic to understand how the LED control is implemented. In this code, the LED is being shifted left or right depending on the value of the `toggleDirection` variable. The LED direction is toggled when the `LATA` register reaches the values `0x80` or `0x01`. The `sw` variable is used to detect if a switch (RD6 pin) is pressed to change the LED direction.
3. Check the delay function: The provided code includes a delay function called `delayFunc()`. This function is called in the main loop and introduces a delay to control the LED blinking speed. Check if the delay values (`count1` and `count2`) are appropriate for the desired delay. You may need to adjust these values to achieve the desired blinking speed.
4. Test the code: Compile and run the code on the Explorer 16 board. Use an oscilloscope or a multimeter to check if there is any voltage change or activity on the Port A pin. You can also add debug statements or LED indicators to check if different parts of the code are being executed.
By following these steps, you should be able to identify any potential issues with the code or hardware connections that are causing the LED not to work.