#pragma config MCLRE = OFF // MCLR Pin Function Select bit->MCLR pin function is digital input, MCLR internally tied to VDD #pragma config PWRTE = ON // Power-up Timer #pragma config WDTE = OFF // Watchdog Timer

#pragma config BOREN = ON // Brown-out Reset #pragma config FOSC = INTOSC // Oscillator Selection The code has a 1 second delay before reading the ADC again and checking the value. Turn the potentiometer will increase or decrease the output voltage – please note that this voltage should be only used for measurement and not to drive the circuit. The output is changed by turning the shaft. Anything below that will keep it off.Ī 10K potentiometer is attached to PORT.A1 – which is configured as the analog input.įor a quick potentiometer refresher – see the image below. The setup has a LED attached to PORT.A0 – which will light when the input voltage value is greater than 128. So, lets put that to code and get something to light a LED when the input voltage goes over a certain value. Wait for ADC conversion to complete by Polling the GO/DONE bit: ADCONbits.GO_nDONE = 1 //Start the conversion.Start conversion by setting the GO/DONE bit. ADCONbits.CHS = 0b001 //Select the Analog channel – PORT.A1 or AN1.//Set Analog conversion clock FOSC/32, since we are running 16Mhz, we need to have a conversion time at or greater 1uS – FOSC/32 will give us 2uS – See Table 15-1 in the PIC10F322 Datasheet.ANSELAbits.ANSA1 =1 //Enable Analog PORT.A1.TRISAbits.TRISA1 = 1 //Make pin Input PORT.A1.Here is the process that enables the ADC on Port.A1 and reads a value.

This allows you to convert an analog signal (voltage) to an 8bit value (0 – 255) that you can use – to do whatever you dream up. The PIC10F322 Analog-to-Digital Converter has three selectable external analog channels.

Analog to digital converter project