;; -*- scheme -*- ; not really, but tells emacs how to format this
;;
;; Copyright 2007 Free Software Foundation, Inc.
;; 
;; This file is part of GNU Radio
;; 
;; GNU Radio is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; 
;; GNU Radio is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
;; 
;; You should have received a copy of the GNU General Public License along
;; with this program; if not, write to the Free Software Foundation, Inc.,
;; 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
;;

;; ----------------------------------------------------------------
;;              This is an mblock header file
;;
;; The format is very much a work-in-progress.
;; It'll be compiled to C++.
;; ----------------------------------------------------------------

;; In the outgoing messages described below, invocation-handle is an
;; identifier provided by the client to tag the method invocation.
;; The identifier will be returned with the response, to provide the
;; client with a mechanism to match asynchronous responses with the
;; commands that generate them.  The value of the invocation-handle is
;; opaque the the server, and is not required by the server to be
;; unique.
;;
;; In the incoming messages described below, invocation-handle is the
;; identifier provided by the client in the prompting invocation.  The
;; identifier is returned with the response, so that the client has a
;; mechanism to match asynchronous responses with the commands that
;; generated them.
;;
;; status is either #t, indicating success, or a symbol indicating an error.
;; All symbol's names shall begin with %error-


;; ----------------------------------------------------------------
;; usrp-channel
;;
;; The protocol class is defined from the client's point-of-view.
;; (The client port is unconjugated, the server port is conjugated.)

(define-protocol-class usrp-channel

  (:outgoing

   (cmd-allocate-channel invocation-handle capacity-reservation)

   ;; The cmd-allocate-channel message requests that the server
   ;; allocates a logical channel in the FPGA for use.
   ;; capacity-reservation specifies the number of bytes/s of
   ;; interconnect capacity (USB or ethernet) to reserve for this
   ;; channel.  (The reservation is just a sanity check, no OS
   ;; specific mechanism is used.)

   (cmd-deallocate-channel invocation-handle channel)

   ;; The integer channel specifies the channel to deallocate.

   )

  (:incoming


   (response-allocate-channel invocation-handle status channel)

   ;; If successful, a channel the specified capacity was allocated.
   ;; channel, an integer, indicates which channel was allocated.

   (response-deallocate-channel invocation-handle status)

   ;; If successful, the specified channel and associated interconnect
   ;; capacity were deallocated.

   )
  )

;; ----------------------------------------------------------------
;; usrp-low-level-cs
;;
;; The protocol class is defined from the client's point-of-view.
;; (The client port is unconjugated, the server port is conjugated.)
;;
;; This defines a low level control and status interface to the usrp.
;; This will probably be replaced (or at least augmented) with a
;; higher level interface.  For now, this will allow us to get on
;; the air.
;;
;; The subpackets are lists containing the relevant parameters.  The
;; server will marshall them appropriately.  Below is a list of
;; subpackets.  See inband-signaling-usb for details.  The opcodes are
;; symbols; unless otherwise indicated the remaining parameters are
;; integers.  rid values are limited to 3-bits.
;;
;;   (op-ping-fixed rid ping-value)
;;   (op-ping-fixed-reply rid ping-value)
;;   (op-write-reg reg-number reg-value)
;;   (op-write-reg-masked reg-number reg-value mask-value)
;;   (op-read-reg rid reg-number)
;;   (op-read-reg-reply rid reg-number reg-value)
;;   (op-i2c-write i2c-addr u8-vec)
;;   (op-i2c-read rid i2c-addr nbytes)
;;   (op-i2c-read-reply rid i2c-addr u8-vec)
;;   (op-spi-write enables format opt-header-bytes u8-vec)
;;   (op-spi-read rid enables format opt-header-bytes nbytes)
;;   (op-spi-read-reply rid u8-vec)
;;   (op-delay ticks)


(define-protocol-class usrp-low-level-cs

  (:outgoing

   (cmd-to-control-channel invocation-handle list-of-subpackets)

   )

  (:incoming

   (response-from-control-channel invocation-handle status list-of-subpackets timestamp)

   )
  )

;; ----------------------------------------------------------------
;; usrp-tx
;;
;; The protocol class is defined from the client's point-of-view.
;; (The client port is unconjugated, the server port is conjugated.)

(define-protocol-class usrp-tx
  (:include usrp-channel)
  (:include usrp-low-level-cs)

  (:outgoing

   (cmd-xmit-raw-frame invocation-handle channel samples timestamp properties)

   ;; The argument channel must be an integer.  It specifies the
   ;; channel on which the frame of samples will be be sent.
   ;;
   ;; samples must be a uniform numeric vector.  The contents of the
   ;; sample vector is treated as opaque and is passed on to the FPGA
   ;; unmodified.  It is the responsibility of the sender to ensure
   ;; that the binary format is sensible for the current FPGA
   ;; configuration.
   ;;
   ;; timestamp is a 32-bit integer that specifies the time at which
   ;; the first sample in samples shall be sent to the D/A converter.
   ;; The format and interpration of time is specified in the file
   ;; inband-signaling-usb
   )

  (:incoming

   (response-xmit-raw-frame invocation-handle status)

   ;; If successful, the samples of the associated frame have been
   ;; transmitted to the USRP.  This message may be used to implement
   ;; Tx flow control.  The client could for example implement a
   ;; policy of never having more than 4 unacknowledged
   ;; cmd-xmit-raw-frame's outstanding.

   )
  )

;; ----------------------------------------------------------------
;; usrp-rx
;;
;; The protocol class is defined from the client's point-of-view.
;; (The client port is unconjugated, the server port is conjugated.)

(define-protocol-class usrp-rx
  (:include usrp-channel)
  (:include usrp-low-level-cs)

  (:outgoing

   (cmd-start-recv-raw-samples invocation-handle channel)

   ;; The argument channel must be an integer.  It specifies the
   ;; channel from which frames of samples will be be received.  The
   ;; server will return response-recv-raw-samples messages until a
   ;; cmd-stop-recv-raw-samples message is received.

   (cmd-stop-recv-raw-samples invocation-handle channel)

   ;; The argument channel must be an integer.  There is no reply to
   ;; this message.
   
   )

  (:incoming

   (response-recv-raw-samples invocation-handle status samples timestamp channel properties)

   ;; samples is a uniform numeric vector.  The contents of the sample
   ;; vector is treated as opaque and is passed from the FPGA
   ;; unmodified.  It is the responsibility of the receiver to decode
   ;; the binary format as appropriate for the current FPGA
   ;; configuration.
   ;;
   ;; timestamp is a 32-bit integer that specifies the time at which
   ;; the first sample in samples was received from the A/D converter.
   ;; The format and interpretation of time is as specified in the
   ;; file inband-signaling-usb.
   ;;
   ;; properties is a dictionary containing additional (key, value)
   ;; pairs associated with the reception of these samples.  In
   ;; particular, the map may contain the Received Signal Strength
   ;; Indication (RSSI) reported by the front end at the time the
   ;; first sample was received from the A/D.

   )
  )


;; ----------------------------------------------------------------
;; usrp-server-cs
;;
;; Control and status port for usrp-server
;;
;; The protocol class is defined from the client's point-of-view.
;; (The client port is unconjugated, the server port is conjugated.)

(define-protocol-class usrp-server-cs

  (:outgoing
   (cmd-open invocation-handle which-usrp)
   (cmd-close invocation-handle)
   (cmd-max-capacity invocation-handle)
   (cmd-ntx-chan invocation-handle)
   (cmd-nrx-chan invocation-handle)
   (cmd-current-capacity-allocation invocation-handle)
   )

  (:incoming
   (response-open invocation-handle status)
   (response-close invocation-handle status)
   (response-max-capacity invocation-handle status capacity)
   (response-ntx-chan invocation-handle status ntx-chan)
   (response-nrx-chan invocation-handle status nrx-chan)
   (response-current-capacity-allocation invocation-handle status capacity)
   )
  )
