/***************************************************************************
	daout1.c
	
   Z-World, 2001
   This sample program is used with the BL2100 series controllers.

   This program outputs a voltage that can be read with a voltmeter. The 
   output voltage is computed with using the calibration constants that
   are read from EEPROM (simulated in Flash).
   	
	!!!This program must be compiled to Flash.
   
	Instructions:
	Connect a voltage meter to an output channel DAC0 - DAC3.
	Compile and run this program.
	Follow the prompted directions of this program during execution.
	
***************************************************************************/

#define ESC		 27

// set the STDIO cursor location and display a string
void DispStr(int x, int y, char *s)
{
   x += 0x20;
   y += 0x20;
   printf ("\x1B=%c%c%s", x, y, s);
}

// clear the STDIO display for the range specified (start/end rows)
void clrscreen(int startrow, int endrow)
{
	auto char s[81];
	auto int i;
	
	for(i = 0; i < 80; i++)
	{
		s[i] = 0x20;
	}
	s[i] = '\0';
	while(startrow <= endrow)
	{
		 DispStr(0, startrow++, s);
	}
}

///////////////////////////////////////////////////////////////////////////
main()
{
	auto int channel;
	auto float voltout, volt1, volt2;
	auto char tmpbuf[24];
	auto int key, done, cal_error;
	
	brdInit();		// Required for BL2100 series boards
	DispStr(1, 1, "DAC0 - DAC3 Voltage Out Program");
	DispStr(1, 2, "-------------------------------");

	for(;;)
	{
		DispStr(1, 3, "Please enter an output channel (0 - 3) = ");
		do
		{
			channel = getchar();
		} while (!((channel >= '0') && (channel <= '3')));
		printf("%d", channel-=0x30);
		
		done = FALSE;
		while (!done)
		{
			// display DAC voltage message
			DispStr(1, 6, "Type a desired voltage (in Volts) =  ");

			// get user voltage value for the DAC thats being monitored
			voltout = atof(gets(tmpbuf));

			// send voltage value to DAC for it to output the voltage   
			anaOutVolts(channel, voltout);
			DispStr(1, 7, "Observe voltage on meter.....");

			// display user options
			DispStr(1, 10, "User Options:");
			DispStr(1, 11, "-------------");
			DispStr(1, 12, "- Press the SPACEBAR to change the voltage");
			DispStr(1, 13, "- Press 'C' to change the DAC channel");
			DispStr(1, 14, "- Press the 'Q' key to quit");

			while(1)
			{
				// wait for a key to be pressed
				while(!kbhit());
				key = getchar();
				if(key == 'C' || key == 'c')
				{
					// exit while loop and clear previous calibration infor
					done = TRUE;
					clrscreen(3, 14);				
					// empty keyboard buffer
					while(kbhit()) getchar();
					break;      
				}
				if (key == 'Q' || key == 'q')		// check if it's the q or Q key        
				{
					// exit sample program     
     				exit(0);               
   			}
				if(key == 0x20)
				{
   				// empty the keyboard buffer and clear user options
   				while(kbhit()) getchar();
   				clrscreen(6, 14);
   				break;
   			}
			}
		}
	}
}
///////////////////////////////////////////////////////////////////////////
