motor-drive-layer
Python bindings for the Motor-Drive-Layer native C++ Damiao motor driver.
The package loads the bundled C ABI library through Python ctypes and exposes
SocketCAN, SocketCAN-FD, Damiao serial bridge, and optional DM_Device transports.
Published wheels cover Linux x86_64/ARM64, macOS Intel/Apple Silicon, and Windows x64. The serial
transport is cross-platform; SocketCAN transports remain Linux-only.
DM-USB2FDCAN Dual works with its original dual_app firmware through
Controller.from_dm_device(device="usb2canfd-dual", channel=0, bitrate=1_000_000, data_bitrate=5_000_000). CH0 and CH1 are independently selectable, old positional arguments remain
compatible, and the loader probes both vendor v1.0 and v1.1 ABIs. Install the separate vendor
runtime with motor-drive-layer-install-dm-device --download or set MOTOR_DM_DEVICE_LIB.
On final Controller close, v1.1 fully tears down its device session. The Linux v1.0 runtime instead
closes the selected channels and motor-layer resources but retains its legacy context/device until
process exit, allowing a later Controller.from_dm_device(...) call to reconnect reliably in the
same Python process. A process-scope cleanup closes and destroys those retained vendor objects at
normal process exit.
Use Motor.request_fresh_state(timeout_ms=50) when the caller must wait for a newly requested
feedback frame. For multiple motors, Controller.request_feedback_all(timeout_ms=50) sends every
request with the configured TX pacing and waits against one shared deadline; a timeout reports the
missing motor IDs. The lower-level request_feedback(), get_state(), and
poll_feedback_once() methods remain non-blocking asynchronous/cache operations.
For synchronized multi-channel control, ControllerGroup([ch0, ch1]) creates one persistent
native worker per Controller. send_pos_vel([...]) and send_mit([...]) dispatch typed
PosVelCommand or MitCommand values across their owning controllers, overlap independent TX
pacing waits, and return after every controller finishes. Errors retain the controller/channel,
motor ID, and native reason.
For fixed high-rate layouts, prepare_pos_vel(motors) and prepare_mit(motors) reuse one validated
ctypes command array across calls. Controller.transport_capabilities() reports the active
transport's CAN-FD, channel, parallel-send, reconnect, session-reuse, and timestamp capabilities.
The motor-drive-layer-stress command provides a feedback-only DM_Device load/reconnect test and
reports latency plus Linux file-descriptor/thread counts. It never enables or commands motors.
The wheel includes py.typed and .pyi declarations for editor completion and static type
checking. The main public APIs are:
Controller(...),from_socketcanfd(...),from_dm_serial(...), andfrom_dm_device(...).Controller.add_damiao_motor(...),enable_all(),disable_all(),request_feedback_all(),set_tx_gap_us(),transport_capabilities(),shutdown(), andclose_bus().ControllerGroup(...),send_pos_vel(...), andsend_mit(...)for persistent native multi-controller dispatch, plus reusable prepared batches for fixed layouts.Motor.enable(),disable(),ensure_mode(), all four control-mode send methods, fresh/cached feedback methods, typed register access, parameter aliases, andstore_parameters().MitCommand,PosVelCommand,MotorState,FeedbackStats,Mode, register metadata/constants, and SDK exception classes.
Motor is a logical child of its creating Controller. After the parent closes, motor operations
raise CallError; motor.close() can still release the handle. Both classes support context
managers. Leaving a Motor context only frees its handle, while leaving a Controller context attempts
to disable all motors before closing the bus.
See the project README for build instructions, architecture, configuration, safety guidance, and examples.
This package is distributed under the MIT License. The optional DM_Device vendor runtime is distributed separately and may have its own license terms.
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Release files for motor-drive-layer 0.5.9
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| motor_drive_layer-0.5.9-py3-none-win_amd64.whl | Python 3 | none | Windows x86-64 | Details |
| motor_drive_layer-0.5.9-py3-none-manylinux_2_35_x86_64.whl | Python 3 | none | Linux glibc 2.35+ x86-64 | Details |
| motor_drive_layer-0.5.9-py3-none-manylinux_2_35_aarch64.whl | Python 3 | none | Linux glibc 2.35+ ARM64 | Details |
| motor_drive_layer-0.5.9-py3-none-macosx_11_0_x86_64.whl | Python 3 | none | macOS 11.0+ x86-64 | Details |
| motor_drive_layer-0.5.9-py3-none-macosx_11_0_arm64.whl | Python 3 | none | macOS 11.0+ ARM64 | Details |
Total release size: 680.4 kB
Release files / motor_drive_layer-0.5.9-py3-none-win_amd64.whl
| Download URL | motor_drive_layer-0.5.9-py3-none-win_amd64.whl |
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