invalid conversion from 'int*' to 'uint8_t - arduino

Question

im having a problem, i just bought an arduino and i was wondering if anyone could help, here is my code. (i am just trying to get two leds to fade in and out).
int ledCount = 2;
int ledPins [ ] = {11,12 };
int brightness = 0;
int delayTime = 10;
void setup() {
pinMode(ledPins, OUTPUT);
}
void loop() {
while(brightness < 255)
{
analogWrite(ledPins, brightness);
delay(delayTime);
brightness = brightness + 1;
}
while(brightness > 0)
{
analogWrite(ledPins, brightness);
delay(delayTime);
brightness = brightness - 1;
}
}

Answer 1

You are passing an array to analogWrite or pinMode, where it is expecting a uint8_t.
Arduino pin manipulation functions will only handle a single pin at a time. There are ways around that, by directly manipulating the AVR/ARM GPIO registers, but those can be finicky (not recommended for use unless you really need speed).
The reason it says int * is because under the hood, arrays in C/C++ are represented as pointers.
If you want to analogWrite or pinMode to both LEDs, you will have to call the function once for each LED. Example:
analogWrite(ledPins[0], brightness);
analogWrite(ledPins[1], brightness);
Or
for(int currentLED = 0;currentLED < ledCount;i++){
analogWrite(ledPins[currentLED], brightness);
}
In the context of your program:
int ledCount = 2;
int ledPins [] = {11, 12};
int brightness = 0;
int delayTime = 10;
#define INCREASE 1
#define DECREASE 2
int brightness_change = INCREASE;
void setup(){
for(int i = 0;i < ledCount;i++){
pinMode(i, OUTPUT);
}
}
void loop(){
while(brightness < 255 && brightness_change == INCREASE){
brightness = brightness + 1;
}
while(brightness > 0 && brightness_change == DECREASE){
brightness = brightness - 1;
}
if(brightness == 255){
brightness_change = DECREASE;
}
if(brightness == 0){
brightness_change = INCREASE;
}
for(int current_led = 0;current_led < ledCount;current_led++){
analogWrite(current_led, brightness;
}
delay(delayTime;
}
Not tested, but it should work.