// Author: Andrew Wilson
// Date: 6/28/2006
// Description: This program will control a stepper motor driver circuit.
//   it will monitor two inputs: analog potentiometer, and digital rpm sensor
//   the program will ramp the speed output of the motor depending on the 
//   position of the potentiomenter.  the rpm sensor will be used to ensure the
//   correct speed is maintained.

#include <18F2520.h>
#include "stepper_driver.h"
#fuses INTRC, NOWDT, NOLVP
#use delay(clock=8000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, stream=PC)

int main()
{
	int16 v_reading; //the pic18f2550 has a 10-bit A-to-D converter
					 //this gives 1024 possible steps

	printf("Stepper Motor Interface v1, brought to you by:\n\r");
	printf("Andrew Wilson\n\r");
	printf("reconnsworld.com\n\r");

	//this sets up PIN A0 as an analog-in pin.
	//it is OR'd with VSS_VDD which forces the pic to use
	//  ground and VDD as reference voltages
	setup_adc_ports(AN0_TO_AN1 || VSS_VDD);

	//this (i think) sets the ADC to clock via the internal
	//instruction clock
	setup_adc(ADC_CLOCK_INTERNAL);

	set_adc_channel(1);  //we will only be using this channel
						 //no need to set it again.

	while(1)
	{

		v_reading = read_adc();
		
		printf("Reading is: %4lu; for an approximate voltage of: %5f\n\r", v_reading, (5.0*(((float)v_reading)/((float)MAX_READING))));

		delay_ms(100);
		output_toggle(PIN_A0);

	}

	return 1;
}