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50 lines
2.4 KiB
Racket
50 lines
2.4 KiB
Racket
#lang br
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(require "helper.rkt" (for-syntax racket/base racket/syntax racket/require-transform br/syntax))
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(provide #%top-interaction #%module-begin #%app #%datum and or (all-defined-out))
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(define #'(chip-program _chipname
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(in-spec (_input-pin _input-width ...) ...)
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(out-spec (_output-pin _output-width ...) ...)
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_part ...)
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(with-syntax* ([chip-prefix (format-id #'_chipname "~a-" #'_chipname)]
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[(in-pin-write ...) (map (λ(iw) (format-id iw "~a-write" iw)) (syntax->list #'(_input-pin ...)))]
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[(prefixed-output-pin ...) (map (λ(op) (format-id op "~a~a" #'chip-prefix op)) (syntax->list #'(_output-pin ...)))])
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#'(begin
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(provide (prefix-out chip-prefix (combine-out _input-pin ... in-pin-write ...)))
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(define-input-bus _input-pin _input-width ...) ...
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_part ...
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(provide prefixed-output-pin ...)
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(define-output-bus prefixed-output-pin _output-pin _output-width ...) ...)))
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(define #'(part _prefix ((_wire . _wireargs) _wirevalue) ...)
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(with-syntax ([(prefixed-wire ...) (map (λ(s) (format-id s "~a-~a" #'_prefix s)) (syntax->list #'(_wire ...)))]
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[chip-module-path (datum->syntax #'_prefix (format "~a.hdl.rkt" (syntax->datum #'_prefix)))])
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#'(begin
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(require (import-chip chip-module-path) (for-syntax (import-chip chip-module-path)))
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(handle-wires ((prefixed-wire . _wireargs) _wirevalue) ...))))
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(define-syntax import-chip
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(make-require-transformer
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(λ (stx)
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(syntax-case stx ()
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[(_ module-path)
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(expand-import #'module-path)]))))
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(define #'(handle-wires _wire-assignments ...)
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(let-values ([(in-wire-stxs out-wire-stxs)
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(partition-syntax-case
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([((prefixed-wire . _wireargs) _)
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(syntax-local-eval (syntax-shift-phase-level #'(input-bus? prefixed-wire) 1))])
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#'(_wire-assignments ...))])
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(with-syntax* ([(((in-wire in-arg ...) input-expr) ...) in-wire-stxs]
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[(in-wire-write ...) (map (λ(iw) (format-id iw "~a-write" iw)) (syntax->list #'(in-wire ...)))]
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[(((out-wire out-arg ...) (out-bus)) ...) out-wire-stxs])
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#'(begin
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(define-output-bus out-bus
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(λ ()
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(in-wire-write in-arg ... input-expr) ...
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(out-wire out-arg ...))) ...)))) |