HP HIL
https://en.wikipedia.org/wiki/HIL_bus
http://www.hparchive.com/Journals/HPJ-1987-06.pdf
two types of SDL receptacles are used in the HP-HIL system: II A" and liE" keying configurations. To identify the keying of a receptacle, two methods are used. First, the receptacles usually will have an "A" or liE" visible on the outside back or on the inside back (difficult to see when present). Second, the "A" keyed receptacles are now molded in white plastic, while the liE" keyed receptacles are black.
The HP part numbers for the SOL receptacles are as follows:
"A" Keying, White, Female SDL: AMP PIN 1-520192-1
"E" Keying, Black, Female SDL: AMP PIN 5-520791-1
The pinouts and connections of HP-HIL cables are shown in Figure 2-4. As with the receptacles, the plugs are molded in colors to denote keying. Clear plugs are "All keyed, and correspond to white receptacles. Smoke colored plugs are IIE" keyed and correspond to black receptacles.
https://en.wikipedia.org/wiki/Shielded_data_link_connector
The command bit distinguishes a command from data. The address field indicates the destination device in a frame sent by the main processor, or the source device in a frame sent by a device. A universal address (000) is used to send a single command to all devices. The a-bit data field contains the opcode for a command, or a bits of data.
HP-HIL communication is a simple asynchronous serial protocol between the main processor and the input device. Information travels asynchronously in the Link in a fixed format called a "frame." Each frame cons ists of 15 bits of information including start, stop, command, parity, address, and data bits. Information packets are transmitted around the Link at the rate of 10 microseconds per bit, or 150 microseconds per frame. The idle state of the Link is a logic "1", with the first bit in a frame (the start bit) at logic "0" and the last bit (the stop bit) at logic "1." The parity bit is computed so that the total number of logic "1" bits in the 15-bit frame (including start, address, command, data, parity, and stop) is odd.
The SLC can receive a new frame every 153 microseconds and transmit a frame every 154 microseconds. This implies a minimum required idle period of 3 microseconds between receiving frames and a minimum of 4 microseconds between sending frames.
p.4-2
In general, commands are always initiated by the System, although certain commands (described later) may be initiated by a device under the proper conditions. Unless otherwise noted, all commands will by definition be returned to the System (assuming a properly configured Link), preceded by any data reported by the addressed devices. Only one command should be pending on the Link at anyone time; hence the System should always wait for either the command to return or a sufficient period of time so as to indicate that no response is forthcoming before the next transmission. HP-HIL devices are allowed up to 500 microseconds per frame to transmit their response after receiving a command.
| Opcode | Mnemonic | Description |
|---|---|---|
| 00h | IFC | Interface Clear |
| 01h | EPT | Enter Pass-ThruMode |
| 02h | ELB | Enter Loop-Back Mode |
| 03h | IDD | Identify and Describe |
| 04h | DSR | Device Soft Reset |
| 05h | PST | Perform Self Test |
| 06h | RRG | Read Register |
| 07h | WRG | Write Register |
| 08 .. 0Fh | ACF | Auto Configure |
| 10 .. 1Fh | POL | Poll |
| 20 .. 2Fh | RPL | RePoll |
| 30h | RNM | Report Name |
| 31h | RST | Report Status |
| 32h | EXD | Extended Describe |
| 33h | RSC | Report Security Code |
| 34 .. 3Ch | RESERVED FOR FUTURE USE | |
| 3Dh | DKA | Disable Keyswitch AutoRepeat |
| 3Eh | EKl | Enable Keyswitch AutoRepeat, cursor key repeat rate = 1/30 second * |
| 3Fh | EK2 | Enable Keyswitch AutoRepeat, cursor key repeat rate = 1/60 second * |
| 40 .. 46h | PR1 .. PR7 | Prompt 1 •. Prompt 7 |
| 47h | PRM | Prompt (General Purpose) |
| 48 .. 4Eh | AK1 .. AK7 | Acknowledge 1 .. Acknowledge 7 |
| 4Fh | ACK | Acknowledge (General Purpose) |
| 50 .. 7Fh | RESERVED FOR FUTURE USE | |
| 80 .. EFh | Device-Specific Commands | |
| F0 .. F9h | RESERVED FOR FUTURE USE | |
| FAh | RIO | Register I/O Error |
| FBh | SHR | System Hard Reset |
| FCh | TER | Transmission Error |
| FDh | CAE | Configuration Address Error |
| FEh | DHR | Device Hard Reset |
| FFh | RESERVED - Prohibited Opcode |
This command provides a full reset to attached devices, destroying the Link configuration along with any pending device data. Device Hard Reset is used to return devices to their condition at power-up.
Timeouts: 200 ms (devices must perform self-test).
Auto Configure is used to assign unique addresses to each device configured onto the Link, up to the maximum of seven devices.
Timeouts: 10 ms (multiple devices may respond).
Command:
| addr | cmd | data |
|---|---|---|
| 000 | 1 | 08h + 1(first addr) |
Response:
| addr | cmd | data |
|---|---|---|
| 000 | 0 | 08h + <incremented addr[0-7]> |
In 'Incremented addr': 1 means there is no device, 0 means there are seven devices.
CAE(FDh) is received when there are too many devices on the Link?
The primary function of the command is to clear Power-Up Mode in devices and to verify the Link integrity. Configuration information is not affected by IFC. Upon rece1v1ng the command, each device will clear Power-Up Mode, and retransmit the command as received.
Timeouts: 10 ms (Multiple devices may respond).
Identify and Describe is used by the System to determine the type of the attached devices, as well as some general characteristics of these devices required to understand the data they report.
Timeouts: 10 ms (device may respond with data).
Response:
| addr | cmd | data |
|---|---|---|
| AAA | 0 | Device ID |
| AAA | 0 | Describe Record (1-10 bytes) |
| AAA | 1 | 03h |
Describe Records:
Describe Record Header
# Counts / cm(m) Low Byte
# Counts / cm(m) High Byte
Maximum Count X-axis Low Byte
Maximum Count X-axis High Byte
Maximum Count Y-axis Low Byte
Maximum Count Y-axis High Byte
Maximum Count Z-axis Low Byte
Maximum Count Z-axis High Byte
I/O Descriptor Byte
Describe Record Header:
bit7: Set if two independ sets of coordinate axes(two joysticks for example)
bit6: Set if data is absolute position
bit5: Set if data is 16-bits/axis
bit4: Set if I/O Descriptor Byte follows(button, proximity detection, prompt/acknowledge)
bit3: Set if 'Extended Describe' is supported
bit2: Sef if 'Report Security Code' is supported
bit1,0: Number of axes
I/O Descriptor Byte:
bit7: Set if the device has Prompt and Acknowlege function
bit6-4: Number of Prompt and Acknowlege function
bit3: Set if the device has Proximity detection
bit2-0: Number of Button
Extended Describe provides additional information concerning more advanced device features which may not be required for basic operation.
Timeouts: 10ms(device may respond with data).
Response:
| addr | cmd | data |
|---|---|---|
| AAA | 0 | Extended Describe Record (1-6 bytes) |
| AAA | 1 | 32h |
Extended Describe Record:
Extended Describe Record Header
Maximum Read Register Supported
Maximum Write Register Supported
Maximum Write Buffer Length Low Byte
Maximum Write Buffer Length Hight Byte
Localization Code
Extended Describe Record Header:
bit7: Reserved
bit6: Set if Localization Code is supported
bit5: Set if Report Status is suspported
bit4: Set if Report Name is supported
bit3: Reserved
bit2: Set if Read Register is supported
bit1,0: Set if Write Register Type2/1 is supported respectively
This allows system to sequentially open up the Link to additional device until the last device on the Link is determined. When the EPT command is not returned, a timeout occurs transferring control to the ELB (Enter Loop-Back Mode) oval.
Once in Pass-Thru Mode, the device retransmits the command to next device downstream on the Link. No response(timeout) cocurs if the last device is already in Pass-Thru mode.
Timeouts: 5ms(Only one deivce will respond).
This is used to "close the end" of the Link, returning the last device on the Link to Loop-Back Mode so that frames may be returned to the System. At the end of the configuration process, the last device should be in Loop-Back Mode, while all others are in Pass-Thru Mode.
In Loop-Back Mode, the device retransmits the command back to the System.
Timeouts: 5ms(Only one deivce will respond).
The Poll command is the fundamental means for extracting information from the input devices attached to the Link.
Timeouts: 16 ms (multiple devices may respond).
Command:
| addr | cmd | data |
|---|---|---|
| 000 | 1 | 10h |
Response:
| addr | cmd | data |
|---|---|---|
| 000 | 0 | xxxx xxxx(data) |
| : | : | : |
| 000 | 0 | xxxx xxxx(data) |
| 000 | 1 | 10h + <num of data[0-15]> |
HP-HlL Touch Accessory, HP 35723A. A 12-inch user-installable touchscreen bezel which provides touch interaction with
the host computer. The HP 35723A features a resolution of 43x57 points maximum.
tablet with 1200-lines-per-inch resolution.
keyboards are generally supplied with the computer for which they were designed (e.9., HP TouchScreen ll, Vectra, and HP 9000 Series 300), These keyboards are available in a wide variety of languages.
positioning the cursor on the screen. lt has 200-counts-perinch resolution and two buttons.
HP-HIL Rotary Control Knob, HP 460834. This module provides two-axis relative cursor positioning via a rotary knob and
a toggle key. lt has a resolution of 480 counts per revolution.
users to run secured application software. lt returns an identification number for identifying the computer user and is used in application programs to control access to program lunctions, data bases, and networks,
graphics positioning dials. lt is used in graphics display applications to provide three-axis rotate, translate, scale, and other attribute functions. Each dial has a resolution of 480 counts oer revolution.
This box provides 32 userdelinable buttons for menu selection and one user-programmable LED. lt is used in CAD/CAE applications.
Thesedigitizers are for use in interactive graphics, graphics entry, and menu selection applications. Two active area sizes (A or B) are offered. They each have a resolution of 1000 lines per inch. An optional cursor with crosshair is available,
This product provides a nine-pin subminiature connector for interfacing quadrature signals to HP-HlL. Three keyswitches are supported.
This module provides an alternatlve to the keyboard for data entry applications. lt reads UPC/EAN/JAN, interleaved 2-out-o{-5, Codabar (MHI and USD-1), 3-of-9, and extended 3-of-9 codes.
My HIL Keyboard