' =========================================================================
'   File....... SW21-EX07-Light_Show.SXB
'   Purpose.... Mini Light Show Controller with Speed Adjust
'   Author..... (C) 2000 - 2005, Parallax, Inc.
'   E-mail..... support@parallax.com
'   Started.... 01 SEP 2005
'   Updated.... 23 MAR 2007 by TSaavik for SX28
' =========================================================================

' -----[ Program Description ]---------------------------------------------
'
' Runs a small, multi-mode light show controller using six outputs (runs
' on LEDs, but with proper interfacing could run incandescent lamps).
' This program will require modifications (to the constants LoSpeed and
' Scale) when running on the BS2Sx, BS2p, or BS2px.

'------{ Device Settings ]-------------------------------------------------

DEVICE 		SX28,TURBO,BANKS8,OSCHS3,SYNC,OPTIONX
FREQ            50_000_000
ID		"EX07"

' -----[ I/O Definitions ]-------------------------------------------------

Lights            VAR     RB			' LEDs on RB.0 - RB.7
Speed             VAR     RA.0                  ' Pot circuit IO (speed control)
LtMode            VAR     RA.1                  ' mode select input


' -----[ Constants ]-------------------------------------------------------

LoSpeed         CON     12                      ' lo end of POT reading
'Scale           CON     $0163                   ' 1.3868 with */
Scale           CON     $05F3                   ' 1.3868 with */

' -----[ Variables ]-------------------------------------------------------

rawSpd          VAR     Word                    ' speed input from POT
delay           VAR     Word                    ' time between patterns
btnVar          VAR     Byte                    ' workspace for BUTTON
modeSelect      VAR     Byte                    ' selected mode
maxSteps        VAR     Byte                    ' offset into patterns
rndVal          VAR     Byte                    ' workspace for RANDOM
testPot		VAR	Byte                    ' 1 for POT testing
idx		VAR	Byte			' Index for subs

' -----[ Initialization ]-------------------------------------------------
PROGRAM Start
watch Lights, 6, UBIN
watch rawSpd, 16, UDEC
watch Speed, 8, UDEC
watch LtMode, 1, UBIN
watch ModeSelect, 8, UDEC
watch maxSteps, 8, UDEC
watch rndVal, 8, UDEC 
watch delay, 16, UDEC
watch idx, 8, UDEC

' -----[Subs ]------------------------------------------------------------
Read_Speed        SUB     0
ModeA             SUB     0
ModeB             SUB     0
ModeC             SUB     0
ModeD             SUB     0
ModeE             SUB     0

' -----[ Program Code ]----------------------------------------------------

Start:
  Lights = %00111111                            ' start with LEDs on
  Tris_A = %0011				' Make ra.0 and ra.1 inputs
  Tris_B = %00000000                            ' make LEDs outputs
  idx = 1
  TestPot = 1 		                        ' 1 for POT testing
  IF TestPot = 1 THEN                           ' for reading raw pot value
     DO
      GOSUB Read_Speed
      PAUSE 50
    LOOP
  ENDIF
 
Main:
 BREAK
 GOSUB Read_Speed                              ' read speed pot
  'delay = (rawSpd - LoSpeed) */ Scale + 50     ' calc delay (50-1000 ms)
  delay = rawSpd - LoSpeed                      ' calc delay (50-1000 ms)
  delay = delay */ Scale                        ' calc delay (50-1000 ms)
  delay = delay + 50                            ' calc delay (50-1000 ms)
  'delay = 1000
  PAUSE delay                                   ' wait between patterns

Switch_Check:
  ''BUTTON LtMode,        0,   255,    0,    btnVar,           0, Show
  ''BUTTON    Pin,DownState, Delay, Rate, Workspace, TargetState, Address 
  IF LtMode = 0 THEN
     Pause 10
     IF ltMode = 0 THEN
        'modeSelect = modeSelect + 1 // 5               ' yes, update mode var
        modeSelect = modeSelect + 1 	                ' yes, update mode var
        modeSelect = modeSelect // 5                    ' yes, update mode var
     ENDIF
  ENDIF
  'modeSelect = 0
Show:

  Branch modeSelect, ModeA, ModeB, ModeC, ModeD, ModeE
  GOTO Main

  END


' -----[ Gosubs ]-----------------------------------------------------

Read_Speed:
  HIGH Speed                                    ' charge cap
  PAUSE 1                                       ' for 1 millisecond
  RCTIME Speed, 1, rawSpd                       ' read the Pot
  RETURN

ModeA:
  READ Pattern0, maxSteps                       ' get steps in sequence
  IF idx <= maxSteps THEN                       ' check idx range
    READ Pattern0 + idx, Lights                 ' get step pattern
    INC idx                                     ' point to next step
  ELSE
    idx = 1                                     ' reset idx if needed
  ENDIF
  GOTO Main

ModeB:
  READ Pattern1, maxSteps                       ' get steps in sequence
  IF idx <= maxSteps THEN                       ' check idx range
    READ Pattern1 + idx, Lights                 ' get step pattern
    
    INC idx                                     ' point to next step
  ELSE
    idx = 1                                     ' reset idx if needed
  ENDIF
  GOTO Main

ModeC:
  READ Pattern2, maxSteps                       ' get steps in sequence
  IF idx <= maxSteps THEN                       ' check idx range
    READ Pattern2 + idx, Lights                 ' get step pattern
    
    INC idx                                     ' point to next step
  ELSE
    idx = 1                                     ' reset idx if needed
  ENDIF
  GOTO Main

ModeD:
  READ Pattern3, maxSteps                       ' get steps in sequence
  IF idx <= maxSteps THEN                       ' check idx range
    READ Pattern3 + idx, Lights                 ' get step pattern
    
    INC idx                                     ' point to next step
  ELSE
    idx = 1                                     ' reset idx if needed
  ENDIF
  GOTO Main

ModeE:
  READ Pattern4, maxSteps                       ' get steps in sequence
  IF idx <= maxSteps THEN                       ' check idx range
    READ Pattern4 + idx, Lights                 ' get step pattern
    INC idx                                     ' point to next step
  ELSE
    idx = 1                                     ' reset idx if needed
  ENDIF
  GOTO Main



' -----[ EEPROM Data ]-----------------------------------------------------

Pattern0:
   DATA    6
   DATA    %000001
   DATA    %000010
   DATA    %000100
   DATA    %001000
   DATA    %010000
   DATA    %100000
Pattern1:
   DATA    10
   DATA    %100000
   DATA    %010000
   DATA    %001000
   DATA    %000100
   DATA    %000010
   DATA    %000001
   DATA    %000010
   DATA    %000100
   DATA    %001000
   DATA    %010000
Pattern2:
   DATA    4
   DATA    %000000
   DATA    %001100
   DATA    %010010
   DATA    %100001
Pattern3:
   DATA    3
   DATA    %100100
   DATA    %010010
   DATA    %001001
Pattern4:
   DATA    1
   DATA    %000000