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29 lines
537 B
Racket
29 lines
537 B
Racket
#lang brag
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chip-program : /"CHIP" chipname /"{" in-spec out-spec part-spec /"}"
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@chipname : ID
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in-spec : pin-spec
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out-spec : pin-spec
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@pin-spec : (/"IN" | /"OUT") pin [/"," pin]* /";"
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/pin : ID [/"[" NUMBER /"]"]
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@part-spec : /"PARTS:" part+
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part : partname /"(" pin-val-pair [/"," pin-val-pair]* /")" /";"
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@partname : ID
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/pin-val-pair : ID [/"[" bus-range /"]"] /"=" pin-val
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@bus-range : (NUMBER | BINARY-NUMBER) [/"." /"." (NUMBER | BINARY-NUMBER)]
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@pin-val : ID
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| BINARY-NUMBER
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| TRUE
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| FALSE
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