BS2 - Tips for Quicker Array Writing
olefalcon
Posts: 2
From the official BASIC Stamp Help document, it seems the most basic way of writing to an array is like this:
I know there is also a loop you can use to print the same thing to many slots of the array like this:
I am wondering how I would go about forming a function that takes a list or string of values and writes them into an array. In javascript it is easy to write into an array like this:
If you have upwards of twenty or thirty values you want to write into an array, you really don't want to type "myArray(0) =" every time you have a value to add.
If string handling is a solution, the values I am using are bit-sized (1 unit long), so a string like "AGAB" could become "A", "G", "A", "B", but I don't know how to do that.
Thanks for any help!
Oh and I am using BS2 with PBASIC 2.5
I reedited the post showing that the array can actually be bit datatypes, so storage is NOT the concern here!
myArray VAR Bit(30) myArray(0) = "A" myArray(1) = "B" myArray(2) = "G"
I know there is also a loop you can use to print the same thing to many slots of the array like this:
myArray VAR Bit(30) i VAR Bit FOR i = 0 TO 9 myArray(i) = "B" NEXT
I am wondering how I would go about forming a function that takes a list or string of values and writes them into an array. In javascript it is easy to write into an array like this:
var array[] = ["A", "B", "G"]
If you have upwards of twenty or thirty values you want to write into an array, you really don't want to type "myArray(0) =" every time you have a value to add.
If string handling is a solution, the values I am using are bit-sized (1 unit long), so a string like "AGAB" could become "A", "G", "A", "B", but I don't know how to do that.
Thanks for any help!
Oh and I am using BS2 with PBASIC 2.5
I reedited the post showing that the array can actually be bit datatypes, so storage is NOT the concern here!
Comments
Some of the Stamp models have "scratchpad RAM" which can hold more, again as byte values, but not as conveniently as variables.
Since that is not known, I thought I'd post a working BS2 program that uses string constants. Note that these are actually stored in EEPROM using the DATA directive. You'll also find that some string constants are embedded into SEROUT commands.
' ========================================================================= ' ' File....... uMP3_Demo.BS2 ' Purpose.... ' Author..... JonnyMac ' E-mail..... ' Started.... ' Updated.... ' ' {$STAMP BS2} ' {$PBASIC 2.5} ' ' ========================================================================= ' -----[ Program Description ]--------------------------------------------- ' -----[ Revision History ]------------------------------------------------ ' -----[ I/O Definitions ]------------------------------------------------- Sio PIN 15 ' for DC-16, RC-4; no ULN TX PIN 14 ' to UMP3.R; no ULN RX PIN 13 ' to UMP3.T; no ULN Trigger PIN 12 ' setup = DN ' -----[ Constants ]------------------------------------------------------- #SELECT $STAMP #CASE BS2, BS2E, BS2PE T2400 CON 396 T4800 CON 188 T9600 CON 84 T19K2 CON 32 T38K4 CON 6 #CASE BS2SX, BS2P T2400 CON 1021 T4800 CON 500 T9600 CON 240 T19K2 CON 110 T38K4 CON 45 #ENDSELECT Inverted CON $4000 Open CON $8000 EfxBaud CON Open | T38K4 ' for DC-16, RC-4 MP3Baud CON Open | T9600 ' for uMP3 player Yes CON 1 No CON 0 ' -----[ Variables ]------------------------------------------------------- char VAR Byte ' character value theMP3 VAR Byte ' MP3 file pointer eePntr VAR Word ' EEPROM memory pointer pos VAR Word ' uMP3 file position loopNum VAR Byte ' file loop # in cycle lottery VAR Word ' random value ' -----[ Initialization ]-------------------------------------------------- Reset: PAUSE 2000 ' let uMP3 start Prod_uMP3: DO SEROUT TX, MP3Baud, [CR] ' send CR SERIN RX, MP3Baud, [char] ' get response LOOP UNTIL (char = ">") ' wait for ">" ' -----[ Program Code ]---------------------------------------------------- Main: RANDOM lottery IF (Trigger = No) THEN Main theMP3 = lottery // 3 ' make 0 - 2 GOSUB Play_MP3 ' play it PAUSE 5000 GOTO Main ' -----[ Subroutines ]----------------------------------------------------- ' Put file # to play in "theMP3" ' -- add DATA label entries to LOOKUP as required Play_MP3: LOOKUP theMP3, [SFX0, SFX1, SFX2, SFX3, SFX4, SFX5], eePntr ' get base address Send_Play_Cmd: SEROUT TX, MP3Baud, ["PC F /"] ' start play command Send_Name: ' send file title DO READ eePntr, char eePntr = eePntr + 1 IF char = 0 THEN EXIT SEROUT TX, MP3Baud, [char] LOOP Finish_Cmd: SEROUT TX, MP3Baud, [".MP3", CR] ' send extention + CR Wait_For_Stop: ' let song finish DO GOSUB Get_Status LOOP UNTIL (char = "S") RETURN ' ------------------------------------------------------------------------- ' Gets status from uMP3 ' -- "P" = playing, "D" = paused, "S" = stopped ' -- also gets file position and loop number of play cycle Get_Status: SEROUT TX, MP3Baud, ["PC Z", CR] SERIN RX, MP3Baud, [char, DEC pos, DEC loopNum] RETURN ' -----[ EEPROM Data ]----------------------------------------------------- ' MP3 files are stored in root of SD card ' Table below needs only name, followed by a zero ' Keep names short to conserve EE space SFX0 DATA "Hello", 0 SFX1 DATA "Wolf", 0 SFX2 DATA "Scream", 0 SFX3 DATA "Chuckie", 0 SFX4 DATA "Exorcist", 0 SFX5 DATA "Lightning", 0That is pretty impressive layout for code. I would imagine that is a standard Stamp template for you.