LDR programming with C

[hashoom89]

hi
please i need help to programming microcontroller PIC18f4550
the program must sense LDR sensor
and in this project i used dc motor to control blinds open or closed
please i need your help

 

[MikeMl]

https://www.electro-tech-online.com/threads/links-character-lcds-tutorials-and-info.112077/

Huh? All though that is a great collection of stuff on LCDs, what does it have to do with sensing a Light Sensitive Resistor?

To the OP, have you chosen an LDR? What is the supply voltage to your PIC?

 

[be80be]

Here a little sample for your chip to use ADC It should work

unsigned int temp_res;

void main() {
  ADCON1 = 0b00001110;              // Configure AN0 pin as analog
  ADCON0 = 0d00000001;                 // Configure other AN pins as digital I/O
   
  TRISA  = 0xFF;              // PORTA is input
  TRISC  = 0;                 // PORTC is output
  TRISD  = 0;                 // PORTD is output

  do {
    temp_res = ADC_Read(0);   // Get 10-bit results of AD conversion
    PORTD = temp_res;         // Send lower 8 bits to PORTD
    PORTC = temp_res >> 8;    // Send 2 most significant bits to RC1, RC0
  } while(1);
}
// this code should light up 10 leds 8 of them on portd and the last 2 portc 0,1

 

[3v0]

Good point. Need to go back to grade school and learn to read. I'll remove it.