255 lines
8.4 KiB
C
255 lines
8.4 KiB
C
/*
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usa67msg.h
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Copyright (c) 1998-2007 InnoSys Incorporated. All Rights Reserved
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This file is available under a BSD-style copyright
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Keyspan USB Async Firmware to run on Anchor FX1
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain this licence text
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without modification, this list of conditions, and the following
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disclaimer. The following copyright notice must appear immediately at
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the beginning of all source files:
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Copyright (c) 1998-2007 InnoSys Incorporated. All Rights Reserved
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This file is available under a BSD-style copyright
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of InnoSys Incorprated may not be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY INNOSYS CORP. ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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Fourth revision: This message format supports the USA28XG
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Buffer formats for RX/TX data messages are not defined by
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a structure, but are described here:
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USB OUT (host -> USAxx, transmit) messages contain a
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REQUEST_ACK indicator (set to 0xff to request an ACK at the
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completion of transmit; 0x00 otherwise), followed by data:
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RQSTACK DAT DAT DAT ...
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with a total data length of up to 63.
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USB IN (USAxx -> host, receive) messages begin with a status
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byte in which the 0x80 bit is either:
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(a) 0x80 bit clear
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indicates that the bytes following it are all data
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bytes:
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STAT DATA DATA DATA DATA DATA ...
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for a total of up to 63 DATA bytes,
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or:
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(b) 0x80 bit set
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indiates that the bytes following alternate data and
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status bytes:
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STAT DATA STAT DATA STAT DATA STAT DATA ...
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for a total of up to 32 DATA bytes.
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The valid bits in the STAT bytes are:
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OVERRUN 0x02
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PARITY 0x04
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FRAMING 0x08
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BREAK 0x10
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Notes:
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(1) The OVERRUN bit can appear in either (a) or (b) format
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messages, but the but the PARITY/FRAMING/BREAK bits
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only appear in (b) format messages.
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(2) For the host to determine the exact point at which the
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overrun occurred (to identify the point in the data
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stream at which the data was lost), it needs to count
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128 characters, starting at the first character of the
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message in which OVERRUN was reported; the lost character(s)
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would have been received between the 128th and 129th
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characters.
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(3) An RX data message in which the first byte has 0x80 clear
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serves as a "break off" indicator.
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revision history:
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1999feb10 add reportHskiaChanges to allow us to ignore them
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1999feb10 add txAckThreshold for fast+loose throughput enhancement
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1999mar30 beef up support for RX error reporting
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1999apr14 add resetDataToggle to control message
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2000jan04 merge with usa17msg.h
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2000jun01 add extended BSD-style copyright text
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2001jul05 change message format to improve OVERRUN case
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2002jun05 update copyright date, improve comments
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2006feb06 modify for FX1 chip
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*/
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#ifndef __USA67MSG__
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#define __USA67MSG__
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// all things called "ControlMessage" are sent on the 'control' endpoint
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typedef struct keyspan_usa67_portControlMessage
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{
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u8 port; // 0 or 1 (selects port)
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/*
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there are three types of "commands" sent in the control message:
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1. configuration changes which must be requested by setting
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the corresponding "set" flag (and should only be requested
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when necessary, to reduce overhead on the device):
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*/
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u8 setClocking, // host requests baud rate be set
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baudLo, // host does baud divisor calculation
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baudHi, // baudHi is only used for first port (gives lower rates)
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externalClock_txClocking,
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// 0=internal, other=external
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setLcr, // host requests lcr be set
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lcr, // use PARITY, STOPBITS, DATABITS below
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setFlowControl, // host requests flow control be set
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ctsFlowControl, // 1=use CTS flow control, 0=don't
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xonFlowControl, // 1=use XON/XOFF flow control, 0=don't
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xonChar, // specified in current character format
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xoffChar, // specified in current character format
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setTxTriState_setRts,
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// host requests TX tri-state be set
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txTriState_rts, // 1=active (normal), 0=tristate (off)
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setHskoa_setDtr,
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// host requests HSKOA output be set
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hskoa_dtr, // 1=on, 0=off
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setPrescaler, // host requests prescalar be set (default: 13)
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prescaler; // specified as N/8; values 8-ff are valid
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// must be set any time internal baud rate is set;
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// must not be set when external clocking is used
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/*
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3. configuration data which is simply used as is (no overhead,
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but must be specified correctly in every host message).
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*/
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u8 forwardingLength, // forward when this number of chars available
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reportHskiaChanges_dsrFlowControl,
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// 1=normal; 0=ignore external clock
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// 1=use DSR flow control, 0=don't
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txAckThreshold, // 0=not allowed, 1=normal, 2-255 deliver ACK faster
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loopbackMode; // 0=no loopback, 1=loopback enabled
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/*
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4. commands which are flags only; these are processed in order
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(so that, e.g., if both _txOn and _txOff flags are set, the
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port ends in a TX_OFF state); any non-zero value is respected
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*/
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u8 _txOn, // enable transmitting (and continue if there's data)
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_txOff, // stop transmitting
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txFlush, // toss outbound data
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txBreak, // turn on break (cleared by _txOn)
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rxOn, // turn on receiver
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rxOff, // turn off receiver
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rxFlush, // toss inbound data
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rxForward, // forward all inbound data, NOW (as if fwdLen==1)
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returnStatus, // return current status (even if it hasn't changed)
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resetDataToggle;// reset data toggle state to DATA0
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} keyspan_usa67_portControlMessage;
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// defines for bits in lcr
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#define USA_DATABITS_5 0x00
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#define USA_DATABITS_6 0x01
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#define USA_DATABITS_7 0x02
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#define USA_DATABITS_8 0x03
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#define STOPBITS_5678_1 0x00 // 1 stop bit for all byte sizes
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#define STOPBITS_5_1p5 0x04 // 1.5 stop bits for 5-bit byte
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#define STOPBITS_678_2 0x04 // 2 stop bits for 6/7/8-bit byte
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#define USA_PARITY_NONE 0x00
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#define USA_PARITY_ODD 0x08
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#define USA_PARITY_EVEN 0x18
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#define PARITY_1 0x28
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#define PARITY_0 0x38
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// all things called "StatusMessage" are sent on the status endpoint
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typedef struct keyspan_usa67_portStatusMessage // one for each port
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{
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u8 port, // 0=first, 1=second, other=see below
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hskia_cts, // reports HSKIA pin
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gpia_dcd, // reports GPIA pin
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_txOff, // port has been disabled (by host)
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_txXoff, // port is in XOFF state (either host or RX XOFF)
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txAck, // indicates a TX message acknowledgement
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rxEnabled, // as configured by rxOn/rxOff 1=on, 0=off
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controlResponse;// 1=a control message has been processed
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} keyspan_usa67_portStatusMessage;
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// bits in RX data message when STAT byte is included
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#define RXERROR_OVERRUN 0x02
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#define RXERROR_PARITY 0x04
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#define RXERROR_FRAMING 0x08
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#define RXERROR_BREAK 0x10
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typedef struct keyspan_usa67_globalControlMessage
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{
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u8 port, // 3
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sendGlobalStatus, // 2=request for two status responses
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resetStatusToggle, // 1=reset global status toggle
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resetStatusCount; // a cycling value
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} keyspan_usa67_globalControlMessage;
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typedef struct keyspan_usa67_globalStatusMessage
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{
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u8 port, // 3
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sendGlobalStatus, // from request, decremented
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resetStatusCount; // as in request
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} keyspan_usa67_globalStatusMessage;
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typedef struct keyspan_usa67_globalDebugMessage
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{
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u8 port, // 2
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a,
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b,
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c,
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d;
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} keyspan_usa67_globalDebugMessage;
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// ie: the maximum length of an FX1 endpoint buffer
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#define MAX_DATA_LEN 64
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// update status approx. 60 times a second (16.6666 ms)
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#define STATUS_UPDATE_INTERVAL 16
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// status rationing tuning value (each port gets checked each n ms)
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#define STATUS_RATION 10
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#endif
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