pyb — functions related to the board — MicroPython latest documentation (original) (raw)

This is the documentation for the latest development branch of MicroPython and may refer to features that are not available in released versions.

If you are looking for the documentation for a specific release, use the drop-down menu on the left and select the desired version.

The pyb module contains specific functions related to the board.

Miscellaneous functions

pyb.have_cdc()

Return True if USB is connected as a serial device, False otherwise.

Note

This function is deprecated. Use pyb.USB_VCP().isconnected() instead.

pyb.hid((buttons, x, y, z))

Takes a 4-tuple (or list) and sends it to the USB host (the PC) to signal a HID mouse-motion event.

pyb.info([_dump_alloc_table_])

Print out lots of information about the board.

pyb.main(filename)

Set the filename of the main script to run after boot.py is finished. If this function is not called then the default file main.py will be executed.

It only makes sense to call this function from within boot.py.

pyb.mount(device, mountpoint, *, readonly=False, mkfs=False)

Note

This function is deprecated. Mounting and unmounting devices should be performed by vfs.mount() and vfs.umount() instead.

Mount a block device and make it available as part of the filesystem.device must be an object that provides the block protocol. (The following is also deprecated. See vfs.AbstractBlockDev for the correct way to create a block device.)

readblocks and writeblocks should copy data between buf and the block device, starting from block number blocknum on the device.buf will be a bytearray with length a multiple of 512. Ifwriteblocks is not defined then the device is mounted read-only. The return value of these two functions is ignored.

count should return the number of blocks available on the device.sync, if implemented, should sync the data on the device.

The parameter mountpoint is the location in the root of the filesystem to mount the device. It must begin with a forward-slash.

If readonly is True, then the device is mounted read-only, otherwise it is mounted read-write.

If mkfs is True, then a new filesystem is created if one does not already exist.

pyb.repl_uart(uart)

Get or set the UART object where the REPL is repeated on.

pyb.rng()

Return a 30-bit hardware generated random number.

pyb.sync()

Sync all file systems.

pyb.unique_id()

Returns a string of 12 bytes (96 bits), which is the unique ID of the MCU.

pyb.usb_mode([modestr, ]port=-1, vid=0xf055, pid=-1, msc=(), hid=pyb.hid_mouse, high_speed=False)

If called with no arguments, return the current USB mode as a string.

If called with modestr provided, attempts to configure the USB mode. The following values of modestr are understood:

For backwards compatibility, 'CDC' is understood to mean'VCP' (and similarly for 'CDC+MSC' and 'CDC+HID').

The port parameter should be an integer (0, 1, …) and selects which USB port to use if the board supports multiple ports. A value of -1 uses the default or automatically selected port.

The vid and pid parameters allow you to specify the VID (vendor id) and PID (product id). A pid value of -1 will select a PID based on the value of modestr.

If enabling MSC mode, the msc parameter can be used to specify a list of SCSI LUNs to expose on the mass storage interface. For examplemsc=(pyb.Flash(), pyb.SDCard()).

If enabling HID mode, you may also specify the HID details by passing the hid keyword parameter. It takes a tuple of (subclass, protocol, max packet length, polling interval, report descriptor). By default it will set appropriate values for a USB mouse. There is also a pyb.hid_keyboard constant, which is an appropriate tuple for a USB keyboard.

The high_speed parameter, when set to True, enables USB HS mode if it is supported by the hardware.

Constants

pyb.hid_mouse

pyb.hid_keyboard

A tuple of (subclass, protocol, max packet length, polling interval, report descriptor) to set appropriate values for a USB mouse or keyboard.

Classes