//simple led fader (STM32F103C8T6)
#define LED1 PC14
#define LED2 PC15
#define LED3 PA0
#define LED4 PA1
#define LED5 PA2
#define LED6 PA3
#define LED7 PA4
#define LED8 PA5


int duty[12];

long allfcount  = micros();
long maintime  = micros();

void setup() {
  pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(LED5, OUTPUT);
pinMode(LED6, OUTPUT);
pinMode(LED7, OUTPUT);
pinMode(LED8, OUTPUT);

}

void loop() {
  zeitreise();
  machlicht();
  knightrider();
  shufftle();
  }

int aktuell=0;
int lauf,laufm,zeit1;
int newspeed =10;
int zufalltime =1500;
void knightrider(void) {

 if (zeit1 >newspeed) {
  if (lauf <=0) {laufm =0;}
  if(duty[lauf] <400) {duty[lauf]++;}
  if (laufm==0) {
  if (duty[lauf] >=400  && duty[lauf-1] <=1)  {lauf++;}
  if(duty[lauf-1] >0) {duty[lauf-1]--;}}

  if (lauf >=10) {laufm =1;}
  if (laufm==1) {
  if (duty[lauf] >=400 && duty[lauf+1] <=1)  {lauf--;}
   if(duty[lauf+1] >0) {duty[lauf+1]--;}
  }
   zeit1=0;
}}
void zeitreise(void){
  while ((micros()- maintime) >=  100) {
   zeit1++; zufalltime++;
  maintime = micros();
  }
}
void shufftle(void) {
  zufalltime++;
  if (zufalltime > 4500) {newspeed= random(10,70); zufalltime= random(500,2500);}
}
int fcount1=0;
void machlicht(void) {
  while ((micros()-allfcount) >=  2) {
  fcount1++;
  if (fcount1 ==  (401-duty[1])) { digitalWrite(LED1, HIGH );}
  if (fcount1 ==  (401-duty[2])) { digitalWrite(LED2, HIGH );}
  if (fcount1 ==  (401-duty[3])) { digitalWrite(LED3, HIGH );}
  if (fcount1 ==  (401-duty[4])) { digitalWrite(LED4, HIGH );}
  if (fcount1 ==  (401-duty[5])) { digitalWrite(LED5, HIGH );}
  if (fcount1 ==  (401-duty[6])) { digitalWrite(LED6, HIGH );}
  if (fcount1 ==  (401-duty[7])) { digitalWrite(LED7, HIGH );}
  if (fcount1 ==  (401-duty[8])) { digitalWrite(LED8, HIGH );}
  if (fcount1 >=  402 ) {
   digitalWrite(LED1, LOW ); digitalWrite(LED2, LOW ); digitalWrite(LED3, LOW ); digitalWrite(LED4, LOW ); digitalWrite(LED5, LOW ); digitalWrite(LED6, LOW ); digitalWrite(LED7, LOW );
digitalWrite(LED8, LOW );  fcount1 = 1;  }
  allfcount = micros();
  }
}
//justhort code for fading 7led direct on one i/o connected, the led fading up, is, fading down behind running left<->right like knightrider carlight have fun use it or parts if there is something usefull..