Sys

These functions are found in the system module, and should be used with caution.

_modules()

Returns the module cache.

_sleep_until(n)

Sleeps until the system time equals n. Avoid calling this function, sys.sleep(), or sys.time() directly; rather, use the functions in time, which are consistent with the versions used in traditional Python.

exit(val)

Exits the interpreter. This is only really on platforms that can exit, such as the desktop VM.

gcRun()

Immediately forces a garbage collector run.

getb()

Gets a byte from the host. Both getb() and sys.putb() work as direct interfaces to the USB connection, and therefore are primarily used by IPM. However, they are also usable if you’re running a program that does not work through IPM: without IPM, the connection to Owl should appear as the device /dev/mcu. You can manually open this file and write bytes to it, which will then be retrieved from /dev/mcu by a call to getb().

heap()

Returns a tuple containing the number of bytes used in the heap and the total number of bytes the heap can hold.

printFreeList()

Prints the garbage collector’s free list. Note that the garbage collector may run before this functions gets called.

putb(b)

Puts a byte to the host. Like sys.getb(), putb() is generally used with IPM. However, it can be used without IPM to put bytes to /dev/mcu.

sleep(n)

Sleeps for n milliseconds. Avoid calling this function, sys._sleep_until(), or sys.time() directly; rather, use the functions in time, which are consistent with the versions used in traditional Python.

time()

Returns the time, in milliseconds, since the microcontroller was powered on. Note that this includes time spent in the bootloader. Avoid calling this function, sys._sleep_until(), or sys.sleep() directly; rather, use the functions in time, which are consistent with the versions used in traditional Python.