261 lines
8.6 KiB
C
261 lines
8.6 KiB
C
/*
|
|
usa26msg.h
|
|
|
|
Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved
|
|
This file is available under a BSD-style copyright
|
|
|
|
Keyspan USB Async Message Formats for the USA28X
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
1. Redistributions of source code must retain this licence text
|
|
without modification, this list of conditions, and the following
|
|
disclaimer. The following copyright notice must appear immediately at
|
|
the beginning of all source files:
|
|
|
|
Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved
|
|
|
|
This file is available under a BSD-style copyright
|
|
|
|
2. The name of InnoSys Incorporated may not be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY INNOSYS CORP. ``AS IS'' AND ANY EXPRESS OR
|
|
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
SUCH DAMAGE.
|
|
|
|
Third revision: USA28X version (aka USA26)
|
|
|
|
Buffer formats for RX/TX data messages are not defined by
|
|
a structure, but are described here:
|
|
|
|
USB OUT (host -> USAxx, transmit) messages contain a
|
|
REQUEST_ACK indicator (set to 0xff to request an ACK at the
|
|
completion of transmit; 0x00 otherwise), followed by data:
|
|
|
|
RQSTACK DAT DAT DAT ...
|
|
|
|
with a total data length of 63.
|
|
|
|
USB IN (USAxx -> host, receive) messages begin with a status
|
|
byte in which the 0x80 bit is either:
|
|
|
|
(a) 0x80 bit clear
|
|
indicates that the bytes following it are all data
|
|
bytes:
|
|
|
|
STAT DATA DATA DATA DATA DATA ...
|
|
|
|
for a total of up to 63 DATA bytes,
|
|
|
|
or:
|
|
|
|
(b) 0x80 bit set
|
|
indicates that the bytes following alternate data and
|
|
status bytes:
|
|
|
|
STAT DATA STAT DATA STAT DATA STAT DATA ...
|
|
|
|
for a total of up to 32 DATA bytes.
|
|
|
|
The valid bits in the STAT bytes are:
|
|
|
|
OVERRUN 0x02
|
|
PARITY 0x04
|
|
FRAMING 0x08
|
|
BREAK 0x10
|
|
|
|
Notes:
|
|
|
|
(1) The OVERRUN bit can appear in either (a) or (b) format
|
|
messages, but the but the PARITY/FRAMING/BREAK bits
|
|
only appear in (b) format messages.
|
|
(2) For the host to determine the exact point at which the
|
|
overrun occurred (to identify the point in the data
|
|
stream at which the data was lost), it needs to count
|
|
128 characters, starting at the first character of the
|
|
message in which OVERRUN was reported; the lost character(s)
|
|
would have been received between the 128th and 129th
|
|
characters.
|
|
(3) An RX data message in which the first byte has 0x80 clear
|
|
serves as a "break off" indicator.
|
|
|
|
revision history:
|
|
|
|
1999feb10 add reportHskiaChanges to allow us to ignore them
|
|
1999feb10 add txAckThreshold for fast+loose throughput enhancement
|
|
1999mar30 beef up support for RX error reporting
|
|
1999apr14 add resetDataToggle to control message
|
|
2000jan04 merge with usa17msg.h
|
|
2000jun01 add extended BSD-style copyright text
|
|
2001jul05 change message format to improve OVERRUN case
|
|
|
|
Note on shared names:
|
|
|
|
In the case of fields which have been merged between the USA17
|
|
and USA26 definitions, the USA26 definition is the first part
|
|
of the name and the USA17 definition is the second part of the
|
|
name; both meanings are described below.
|
|
*/
|
|
|
|
#ifndef __USA26MSG__
|
|
#define __USA26MSG__
|
|
|
|
|
|
struct keyspan_usa26_portControlMessage
|
|
{
|
|
/*
|
|
there are three types of "commands" sent in the control message:
|
|
|
|
1. configuration changes which must be requested by setting
|
|
the corresponding "set" flag (and should only be requested
|
|
when necessary, to reduce overhead on the USA26):
|
|
*/
|
|
u8 setClocking, // BOTH: host requests baud rate be set
|
|
baudLo, // BOTH: host does baud divisor calculation
|
|
baudHi, // BOTH: baudHi is only used for first port (gives lower rates)
|
|
externalClock_txClocking,
|
|
// USA26: 0=internal, other=external
|
|
// USA17: 0=internal, other=external/RI
|
|
rxClocking, // USA17: 0=internal, 1=external/RI, other=external/DSR
|
|
|
|
|
|
setLcr, // BOTH: host requests lcr be set
|
|
lcr, // BOTH: use PARITY, STOPBITS, DATABITS below
|
|
|
|
setFlowControl, // BOTH: host requests flow control be set
|
|
ctsFlowControl, // BOTH: 1=use CTS flow control, 0=don't
|
|
xonFlowControl, // BOTH: 1=use XON/XOFF flow control, 0=don't
|
|
xonChar, // BOTH: specified in current character format
|
|
xoffChar, // BOTH: specified in current character format
|
|
|
|
setTxTriState_setRts,
|
|
// USA26: host requests TX tri-state be set
|
|
// USA17: host requests RTS output be set
|
|
txTriState_rts, // BOTH: 1=active (normal), 0=tristate (off)
|
|
|
|
setHskoa_setDtr,
|
|
// USA26: host requests HSKOA output be set
|
|
// USA17: host requests DTR output be set
|
|
hskoa_dtr, // BOTH: 1=on, 0=off
|
|
|
|
setPrescaler, // USA26: host requests prescalar be set (default: 13)
|
|
prescaler; // BOTH: specified as N/8; values 8-ff are valid
|
|
// must be set any time internal baud rate is set;
|
|
// must not be set when external clocking is used
|
|
// note: in USA17, prescaler is applied whenever
|
|
// setClocking is requested
|
|
|
|
/*
|
|
3. configuration data which is simply used as is (no overhead,
|
|
but must be specified correctly in every host message).
|
|
*/
|
|
u8 forwardingLength, // BOTH: forward when this number of chars available
|
|
reportHskiaChanges_dsrFlowControl,
|
|
// USA26: 1=normal; 0=ignore external clock
|
|
// USA17: 1=use DSR flow control, 0=don't
|
|
txAckThreshold, // BOTH: 0=not allowed, 1=normal, 2-255 deliver ACK faster
|
|
loopbackMode; // BOTH: 0=no loopback, 1=loopback enabled
|
|
|
|
/*
|
|
4. commands which are flags only; these are processed in order
|
|
(so that, e.g., if both _txOn and _txOff flags are set, the
|
|
port ends in a TX_OFF state); any non-zero value is respected
|
|
*/
|
|
u8 _txOn, // BOTH: enable transmitting (and continue if there's data)
|
|
_txOff, // BOTH: stop transmitting
|
|
txFlush, // BOTH: toss outbound data
|
|
txBreak, // BOTH: turn on break (cleared by _txOn)
|
|
rxOn, // BOTH: turn on receiver
|
|
rxOff, // BOTH: turn off receiver
|
|
rxFlush, // BOTH: toss inbound data
|
|
rxForward, // BOTH: forward all inbound data, NOW (as if fwdLen==1)
|
|
returnStatus, // BOTH: return current status (even if it hasn't changed)
|
|
resetDataToggle;// BOTH: reset data toggle state to DATA0
|
|
|
|
};
|
|
|
|
// defines for bits in lcr
|
|
#define USA_DATABITS_5 0x00
|
|
#define USA_DATABITS_6 0x01
|
|
#define USA_DATABITS_7 0x02
|
|
#define USA_DATABITS_8 0x03
|
|
#define STOPBITS_5678_1 0x00 // 1 stop bit for all byte sizes
|
|
#define STOPBITS_5_1p5 0x04 // 1.5 stop bits for 5-bit byte
|
|
#define STOPBITS_678_2 0x04 // 2 stop bits for 6/7/8-bit byte
|
|
#define USA_PARITY_NONE 0x00
|
|
#define USA_PARITY_ODD 0x08
|
|
#define USA_PARITY_EVEN 0x18
|
|
#define PARITY_1 0x28
|
|
#define PARITY_0 0x38
|
|
|
|
// all things called "StatusMessage" are sent on the status endpoint
|
|
|
|
struct keyspan_usa26_portStatusMessage // one for each port
|
|
{
|
|
u8 port, // BOTH: 0=first, 1=second, other=see below
|
|
hskia_cts, // USA26: reports HSKIA pin
|
|
// USA17: reports CTS pin
|
|
gpia_dcd, // USA26: reports GPIA pin
|
|
// USA17: reports DCD pin
|
|
dsr, // USA17: reports DSR pin
|
|
ri, // USA17: reports RI pin
|
|
_txOff, // port has been disabled (by host)
|
|
_txXoff, // port is in XOFF state (either host or RX XOFF)
|
|
rxEnabled, // as configured by rxOn/rxOff 1=on, 0=off
|
|
controlResponse;// 1=a control message has been processed
|
|
};
|
|
|
|
// bits in RX data message when STAT byte is included
|
|
#define RXERROR_OVERRUN 0x02
|
|
#define RXERROR_PARITY 0x04
|
|
#define RXERROR_FRAMING 0x08
|
|
#define RXERROR_BREAK 0x10
|
|
|
|
struct keyspan_usa26_globalControlMessage
|
|
{
|
|
u8 sendGlobalStatus, // 2=request for two status responses
|
|
resetStatusToggle, // 1=reset global status toggle
|
|
resetStatusCount; // a cycling value
|
|
};
|
|
|
|
struct keyspan_usa26_globalStatusMessage
|
|
{
|
|
u8 port, // 3
|
|
sendGlobalStatus, // from request, decremented
|
|
resetStatusCount; // as in request
|
|
};
|
|
|
|
struct keyspan_usa26_globalDebugMessage
|
|
{
|
|
u8 port, // 2
|
|
a,
|
|
b,
|
|
c,
|
|
d;
|
|
};
|
|
|
|
// ie: the maximum length of an EZUSB endpoint buffer
|
|
#define MAX_DATA_LEN 64
|
|
|
|
// update status approx. 60 times a second (16.6666 ms)
|
|
#define STATUS_UPDATE_INTERVAL 16
|
|
|
|
// status rationing tuning value (each port gets checked each n ms)
|
|
#define STATUS_RATION 10
|
|
|
|
#endif
|
|
|
|
|