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I am not a programmer at all, so my question most likely will be silly. Yet I'd love to figure it out! I thought to make use of NMIN-0021 board which is 68HC11 processor with embedded Buffalo Momnitor or Max-Forth language. I thought to connect the board to Host PC and write to Serial Port of NMIN-0021 commands that will make it 'do tricks' without programming the 68HC11. I need very little: set pins of Output Port high/low and read A/D converter. From the description of 68HC11 I learned that to set up pins of the port I need to write to it's registers: writing 01 at address $1004 should set pin PB0 to +5v For data acquisition, I want Write 00 to register $1030 then Read register $1030 in a loop. When $1030 is more then 128 (conversion completed), I would read Read register $1031 - That's all I need - the rest I can do in my PC in Visual Basic. I read manual for Buffalo Monitor and Max-Forth list of commands and I can not comprehend how to do it either way. Please help me - explain and maybe send me a small example. Sincerely, Andrey |
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controlling 68HC11 board from Serial Port
Started by ●October 17, 2004
Reply by ●October 18, 20042004-10-18
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Presuming MAX-FORTH works as one would expect (I've had the kit
here for ten years or more, yet to try it out!), > writing 01 at address $1004 should set pin PB0 to +5v HEX 01 1004 C! (may need to go DECIMAL later; reads "value, address, ( Character_put" - language is otherwise word-oriented) > For data acquisition, I want > Write 00 to register $1030 then 00 1030 C! > Read register $1030 in a loop. When $1030 is more then 128 > (conversion completed), I would read BEGIN 1030 C@ ( Read character at address ) 128 > ( 128 is the reference, is greater? ) UNTIL ( exit loop when true ) > > Read register $1031 1031 C@ ( Read character at this address ) . ( Print it out, on this system, presumably to terminal ) ( That was, by the way, a "dot". ) To enter this all as a "word" (program element), encapsulate the text (leave out all bracketed, BTW) in: : READ_INPUT ( define a word of this name ) ( all above code ) ; ( complete definition ) And execute it by entering that same word; "READ_INPUT". Capitals are probably not critical. -- Cheers, Paul B. |
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Reply by ●October 18, 20042004-10-18
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Thank you Paul, looks so simple when you've done it. I did not realize FORTH is built around symbols, like in good old days. Got so used to look for words, descriptors ... Andrey --- In , "Paul B. Webster" <paulb@m...> wrote: > Presuming MAX-FORTH works as one would expect (I've had the kit here > for ten years or more, yet to try it out!), > > > writing 01 at address $1004 should set pin PB0 to +5v > > HEX 01 1004 C! (may need to go DECIMAL later; reads "value, address, > ( Character_put" - language is otherwise word- oriented) > > > For data acquisition, I want > > Write 00 to register $1030 then > > 00 1030 C! > > > Read register $1030 in a loop. When $1030 is more then 128 > > (conversion completed), I would read > > BEGIN > 1030 C@ ( Read character at address ) > 128 > ( 128 is the reference, is greater? ) > UNTIL ( exit loop when true ) > > > > > Read register $1031 > > 1031 C@ ( Read character at this address ) > > . ( Print it out, on this system, presumably to terminal ) > ( That was, by the way, a "dot". ) > > To enter this all as a "word" (program element), encapsulate the text > (leave out all bracketed, BTW) in: > > : READ_INPUT ( define a word of this name ) > ( all above code ) > ; ( complete definition ) > > And execute it by entering that same word; "READ_INPUT". Capitals are > probably not critical. > -- > Cheers, > Paul B. |
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