'OPEN SOURCE FOREVER/PUBLIC DOMAIN
'====================================================
' PSIM-1 (Programmable Synthesizer Interface Module)
'
' Module: PSIM-1 REV1A
' Processor Type: Basic Micro - Basic Atom Pro24M
'
'
'Basic Program originated by dr.mabuse 30 Jan 2004 
'for The Modern Implement Company 
'
'Deranger-C :
' description ( a dance about architecture)
' 
''output: 
'CH 1 a 16 event chromatic sequence that changes order when ever the start-button is pressed
'CH 2 the retrograde row of the above (backwards)
' - the author takes no responsibility for commenting errors because he was sick as a dog when he wrote this
'-------------------------------------------------
' Basic Micro Atom Pro-24M Configuration
'
' (Note: P0 is I/O 0 and NOT pin 0 on the microprocessor.)
'
' P0 -  Analog IN-1 (0-5 VDC)
' P1 -  Analog IN-2 (0-5 VDC)
' P2 -  Analog IN-3 (0-5 VDC)
' P3 -  Analog IN-4 (0-5 VDC)
' P4 -  START Button (Momentary Normally Open Switch)
' P5 -  STOP  Button (Momentary Normally Open Switch)
' P6 -  I2C/SDA (Reserved) - J3 Pin 1
' P7 -  I2C/SDL (Reserved) -  J3 Pin 2
' P8 -  AUX (Digital I/O - NO BUFFERING)
' P9 -  STOP LED
' P10 - RUN LED
' P11 - DAC - LOADDACS
' P12 - DAC - SERDATA
' P13 - DAC - CLOCK
' P14 - RXD (Reserved) - J5 Pin 1 (Midi)
' P15 - TXD (Reserved) - J5 Pin 2 (Midi)
'-------------------------------------------------------
	'Define Variables
	
	LOADDACS	CON 11  ' Pin OUT to DAC LOADDACS
	SERDATA		CON 12  ' Pin OUT Serial Data to DAC (16-bit)
	CLOCK		CON 13  ' Pin OUT to Clock DAC
	STOPLED		CON 9   ' Red LED
	RUNLED		CON 10  ' Green LED
	BSTART		CON 5   ' Start Button
	BSTOP		CON 4   ' Stop  Button
	AUX			CON 8	' AUX Jack (unbuffered)

	RAWDAC1  	VAR WORD  ' RAW DAC DATA 1 
	RAWDAC2  	VAR WORD  ' RAW DAC DATA 2 
	RAWDAC3  	VAR WORD  ' RAW DAC DATA 3 
	RAWDAC4  	VAR WORD  ' RAW DAC DATA 4 

	DAC1V  		VAR WORD  ' DAC Value to be Sent to DAC Channel
	DAC2V  		VAR WORD  ' DAC Value to be Sent to DAC Channel
	DAC3V  		VAR WORD  ' DAC Value to be Sent to DAC Channel
	DAC4V  		VAR WORD  ' DAC Value to be Sent to DAC Channel
	
	ADC1		CON 0
	ADC2		CON	1
	ADC3		CON 2
	ADC4		CON 3

	ADC1V		VAR WORD	'INPUT A/D BUFFER CH. 1
	ADC2V		VAR WORD	'INPUT A/D BUFFER CH. 2
	ADC3V		VAR WORD	'INPUT A/D BUFFER CH. 3
	ADC4V		VAR WORD	'INPUT A/D BUFFER CH. 4
	
	RSEED        VAR WORD
	RDEX         VAR WORD
	DUR          VAR WORD
	RVAL         VAR WORD(32)
	VAL          VAR WORD(32)
	VAL1         VAR WORD
	VAL2         VAR WORD
	J            VAR WORD
	JJ           VAR WORD
	TEMPO        VAR WORD
	UDFLAG       VAR BIT
	DIAL1        VAR WORD
	
	

    '*****************************************************
	'Initialize Module

 DIRS = %1111110000000000 ' Configure Pins    1=input  0=output
 OUTS = %1111111111111111 ' Configure State   1=low    0=high
	'*****************************************************
RSEED = 17	
FOR J = 0 TO 15
    VAL(J)=(J*32)+640; g# + 16 HALF STEPS
    RVAL(J) = 0
NEXT    
LOW RUNLED
LOW STOPLED

TEMPO = 200


MAINLOOP:
     IF IN4 = 1 THEN 
     FOR J = 0 TO 15
         RVAL(J) = 0
     NEXT    
     GOSUB SHAKE; rearrange the steps!
     ENDIF 
     HIGH RUNLED      
      FOR J = 0 TO 15
        JJ = 15 - J 
        DAC1V = RVAL(J)
        DAC2V = RVAL(JJ)
	    DAC3V = VAL(J)
	   
	   ' Debug [DEC J,13]
	   ' Debug [DEC VAL(J),13]
	   ' Debug [DEC RVAL(J),13]
	    GOSUB LOADALLDACS
	    PAUSE TEMPO
	  NEXT
	  LOW RUNLED

GOTO MAINLOOP   

'*******************************************************************
'************************** SUBROUTINES ****************************
' by Grant Richter of Wiard Synthesizer Company as of 17 Jan 2004
'                 ALL FOUR channels are touched 
'*******************************************************************

LOADALLDACS:
	'Add addresses to values no speed improve with OR over +
	RAWDAC1=DAC1V+49152
	RAWDAC2=DAC2V+32768
	RAWDAC3=DAC3V+16384
	RAWDAC4=DAC4V
	'shift out 16 bits mode 4 gotta bang loaddacs pin for each channel
	'skew from ch. 1 to 4 = 400 usecs. Aprox 1 msec execution time for sub.
	SHIFTOUT SERDATA,CLOCK,4,[RAWDAC1\16]
 	PULSOUT LOADDACS,1 
 	SHIFTOUT SERDATA,CLOCK,4,[RAWDAC2\16]
 	PULSOUT LOADDACS,1 
 	SHIFTOUT SERDATA,CLOCK,4,[RAWDAC3\16]
 	PULSOUT LOADDACS,1
 	SHIFTOUT SERDATA,CLOCK,4,[RAWDAC4\16]
 	PULSOUT LOADDACS,1
 	RETURN
 	
SCANADC:
	'load buffers with actual a/d values
	ADIN ADC1, ADC1V
	ADIN ADC2, ADC2V
	ADIN ADC3, ADC3V
	ADIN ADC4, ADC4V
	RETURN
	
SHAKE:
HIGH STOPLED
'rearrange for random array
	FOR J = 0 TO 15
	    
        RSEED = RANDOM RSEED
	    RDEX = RSEED/4096; YIELDS RANGE OF 0 THRU 16
	    TRYAGAIN:
	    IF RVAL(RDEX) <> 0 THEN
	      IF RDEX < 15 THEN
	       RDEX = RDEX + 1
	       GOTO TRYAGAIN
	      ENDIF
	    ENDIF  
	    RVAL(RDEX) = VAL(J)
	  NEXT
	
	LOW STOPLED
	FOR J = 0 TO 15
	    VAL(J) = RVAL(J)
	NEXT     
RETURN