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--- public:calculator:dm41_progs [24/09/22 08:52 BST] – [TI : calculate 65c22 Timer values for tone generation] john
+++ public:calculator:dm41_progs [24/04/23 17:07 BST] (current) – removed john
@@ Line 1: / Line 1: @@
-<-[[.:start]]
-====== DM41X Progs ======
-===== TI : calculate 65c22 Timer values for tone generation =====
-Run as <key>XEQ</key><key>ALPHA</key>''TI''<key>ALPHA</key>
-Prompt ''F'' for required audio tone frequency.
-Enter freq
-<key>R/S</key>
-Result is the 2-byte value for T1CL & T1CH
-e.g.
-<key>XEQ</key><key>ALPHA</key>''TI''<key>ALPHA</key>
-
-<key>R/S</key>
-Result:
-  $001F2
-The Counter should be set to T1CH = $01, T1CL = $F2
-Entered as follows (make sure you're in DECS mode in Ladybug while entering the program - otherwise the ''1000000'' won't be interpreted correctly). When viewing/editing the program later it will look different!
-<code>
-LBL ¬TI
-DECS
-WSIZE 20
-¬ F
-PROMPT
-STI 01
-1000000
-ENTERI
-LDI 01
-x
-/
--
-HEXS
-RTN
-</code>
-===== BFil =====
-++++ Butterworth HPF/LPF Filter designer |
-<code>
-LBL ¬BFIL
-SF 00
-¬MHZ ?
-PROMPT
-E6
-*
-STO 11
-¬N
-PROMPT
-x<0?
-CF 00
-STO 10
-XEQ 06
-LBL 01
-RCL 12
-INT
-XEQ 00
-FS? 00
-/x
-STO IND 12
-ISG 12
-GTO 01
-¬COEFFICIENTS
-FIX 3
-STOP
-ENG 3
-XEQ 06
-LBL 02
-RCL 12
-INT
-RCL IND 12
-RCL 11
-*
-PI
-*
-/
-STO IND 12
-ISG 12
-GTO 02
-XEQ 06
-LBL 03
-RCL 12
-INT
-/
-FRC
-FS? 00
-GTO 09
-GTO 10
-LBL 09
-¬HPF
-x=0?
-GTO 05
-GTO 04
-RTN
-LBL 10
-¬LPF
-x=0?
-GTO 04
-GTO 05
-RTN
-LBL 04
-RCL IND 12
-*
-STO IND 12
-ISG 12
-GTO 03
-RTN
-LBL 05
-RCL IND 12
-/
-STO IND 12
-ISG 12
-GTO 03
-RTN
-LBL 06
-RCL 10
-ABS
-/
-+
-STO 12
-RTN
-LBL 00
-*
--
-*
-RCL 10
-ABS
-*
-/
-SIN
-*
-RTN
-END
-</code>
-++++
-==== Examples ====
-=== 5MHz 5-pole LPF ===
-<key>XEQ</key><key>ALPHA</key><key>BFIL</key><key>ALPHA</key>
-  MHZ ?
-<key>5</key> <key>R/S</key>
-  N
-''Order/poles = N''
-''Positive for HPF''
-''Negative for LPF''
-''5 pole LPF = -5''
-<key>5</key><key>CHS</key><key>R/S</key>
-  COEFFICIENTS
-.618
-(at this point you can <key>RCL 01</key> etc. up to <key>RCL 05</key> to see the calculated Butterworth Coefficients)
-  * R01 : 0.618
-  * R02 : 1.618
-  * R03 : 2.000
-  * R04 : 1.618
-  * R05 : 0.618
-<key>R/S</key>
-  LPF
-.5 -12
-The calculated component values are now in Reg 01 - Reg 05
-  * R01 : 393.5pf
-  * R02 : 2.575uH
-  * R03 : 1.273nF
-  * R04 : 2.575uH
-  * R05 : 393.5pF
-=== 1MHz 7 pole HPF ===
-<key>XEQ</key><key>ALPHA</key><key>BFIL</key><key>ALPHA</key>
-  MHZ ?
-<key>1</key> <key>R/S</key>
-  N
-''Order/poles = N''
-''Positive for HPF''
-''Negative for LPF''
-''7 pole HPF = 7''
-<key>7</key><key>R/S</key>
-  COEFFICIENTS
-.247
-(at this point you can <key>RCL 01</key> etc. up to <key>RCL 07</key> to see the calculated Butterworth Coefficients)
-  * R01 : 2.247
-  * R02 : 0.802
-  * R03 : 0.555
-  * R04 : 0.500
-  * R05 : 0.555
-  * R06 : 0.802
-  * R07 : 2.247
-<key>R/S</key>
-  HPF
-.88 -06
-The calculated component values are now in Reg 01 - Reg 07
-  * R01 : 17.88uH
-  * R02 : 2.553nF
-  * R03 : 4.416uH
-  * R04 : 1.592nF
-  * R05 : 4.416uH
-  * R06 : 2.553nF
-  * R07 : 17.88uH
-===== Page Info =====
-Page created Thu May 26 18:35:00 2022 by John Pumford-Green
-Page last updated: ~~LASTMOD~~
-{{tag>dm41x calculator}}