Post by thread:[SX] Problem with SX/B Compiler

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Fe2o3Fish wrote:A simple little program as follows: 001 DEVICE SX28, OSC4MHZ, TURBO, STACKX, OPTIONX 002 FREQ 4_000_000 003 ID "Foo" 004 005 Program Start 006 007 LED1 VAR RB.0 008 009 FOO VAR BYTE 010 011 Start: 012 FOO = 165 013 RANDOM FOO 014 015 Main: 016 LED1 = FOO & 1 017 PAUSE 500 ' delay 018 RANDOM FOO 019 GOTO Main ' repeat forever 020 021 END Compiling with SX-Key v3.2.3 (the latest version, under Windows XP) comes up with this error message: foo.SXB(54)Line 16, Error 16, Pass 1: UNKNOWN COMMAND "LET".Oh really??? I thought it might be the LE in LED1 bringing up the "LET" so I changed all LED1's to LAD1 and I get the same error message. The SX/B compiler seems to be a little loose on compiling as I've had other strange things happen like undefined variables being permitted by the compiler only to have the assembler burp on an undefined symbol called (which I don't use in my code). I'll report them when I find 'em as I start my adventure into SX/B coding. What's up?

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:You're attempting to move a byte (result of FOO & 1) into a bit -- can't do it (PBASIC masks this by moving bit zero of the result which is probably what you want). Logically, your program could be: Led1 = foo.0 ... because any bit ANDed with 1 will remain unchanged, therefore you can simply copy the target bit to the output LED.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Jon is correct. You cannot assign a larger variable type to a smaller variable type. Please DO post any errors you get with the compiler. We will try to explain and/or correct them. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Fe2o3Fish wrote:Okey dokey. When I get home tonight I'll dig up the (I now know INCORRECT code) that generated the message about an undefined symbol, . Still, that error message sure could be a tad more informative. :-\ Let me take this a little further -- how would I assign the low three bits of 'foo' to the low three bits of an I/O port, say RB?

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Well, you could do this RB = foo & %00000111 or, if you didn't want to disturb the other bits of RB, then: RB.0 = foo.0 RB.1 = foo.1 RB.2 = foo.2 or, here's another way:

tmpB1 = foo & %00000111 RB = RB & %11111000 RB = RB | tmpB1 ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=228160#m228194 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Fe2o3Fish wrote:OK, those certainly make sense. Wuz thinkin' that there might be a SX/B-specific syntax for doing the three bits.

(note to self: think RISC when doing SX/B programming) Thanks John^H^Hn! :-) ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=228160#m228198 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Yes, SX/B is very close to the machine, and if you think that way you will be rewarded with high performance and quick development cycles.

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