Directory of status objects for devices attached to the head unit
When SD cards, USB sticks, or other devices are connected to the computer, PPS objects appear under the /pps/qnx/device/ directory to provide status information and control. In most cases, the status objects are named after the raw devices listed under the /dev directory (e.g., cd0, sda0). For USB devices, object names are of the form:
usb-bus_number.device_number
@cd0 bus::CD device_type::cdrom media_type::dvd prevent_media_removal::0 serial::FUJITSU TEN DVD-ROM DV-05FT2 slot_state::ready slot_status::0/0/0 temperature_state::normal temperature_value::21
| Attribute | Description |
|---|---|
| active_slot | For media changers, the active slot number (if provided). |
| bus | Bus type. |
| device_type | Type of device:
|
| media_type | Type of media:
|
| prevent_media_removal | Indicates whether media may be removed:
|
| serial | Device-specific identifier reported by the driver. |
| slot_state | Mechanical state of the active slot:
|
| slot_status | Key/ASC/ASCQ (often device-specific) codes reported by the drive. For example, on a Fujitsu DVD-ROM DV-05-30:
|
| slots_avail | For media changers, the number of slots available. |
| present_at_startup | Indicates whether the media was present when the drive publisher started:
|
| mechanism_state | For media changers, the state mechanism:
|
| temperature_value | Temperature (in degrees C) if the drive can report a temperature. |
| temperature_state | Temperature state reported by the drive:
|
| temperature_simulation | A value of 1 means that simulation is on (no value means no simulation). |
@sda0 bus::SD card_type::SD device_id::DS locked::no present_at_startup::no product_name::SD08G serial_number::AB00EN18A73 slotname:: speed::24000000 vendor_id::3 write_protection::on
| Attribute | Description |
|---|---|
| bus | Bus type. |
| card_type | Type of card:
|
| device_id | Manufacturer ID. |
| ecc_count | Number of times the device driver has reported ECC errors. |
| locked | Indicates whether (yes|no) the card is locked. |
| present_at_startup | Indicates whether (yes|no) the card was present when the driver started. |
| product_name | OEM product name. |
| serial_number | Card serial number. |
| slotname | Slot name passed to the driver. |
| speed | Card speed (in Hz). |
| status | Error status, if an error occurred. |
| write_protection | Indicates status (on|off) of the write-protect switch. |
[n]@usb-1.4 bus::USB busno::0x01 configuration::1 configurations::1 device_class::0x00 devno::0x04 max_packet_size0::64 product_id::0x1625 serial_number::0019E06B0852A951575A0813 upstream_device_address::1 upstream_host_controller::1 upstream_port::3 upstream_port_speed::High vendor_id::0x0951
| Attribute | Description |
|---|---|
| bus | Type of bus (USB). |
| busno | Bus number (in hex). |
| configuration | Selected configuration. |
| configurations | Number of configurations. |
| device_class | Device class ID (in hex). |
| device_protocol | Device protocol (present only if device_class is not 0x00). |
| device_subclass | Device subclass ID (present only if device_class is not 0x00). |
| devno | Device number. |
| max_packet_size0 | Maximum packet size. |
| product_id | OEM product ID (in hex). |
| serial_number | Product serial number. |
| upstream_device_address | USB address where the device is connected. When connected to a host controller, this is 0; when connected to a USB hub, this is the hub's device address. . |
| upstream_host_controller | Host controller number (usually 0). If you have multiple USB controllers, this is the number of the controller that detected the device. |
| upstream_port | Port number (hub port number or 0 if connected to host controller). |
| upstream_port_speed | Port speed:
|
| vendor_id | Manufacturer ID (in hex). |