suspect-devices/circuitpython/shared-bindings/supervisor/Runtime.c, branch 6.2.xCircuitPython - a Python implementation for teaching coding with microcontrollershttps://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.2.x2021-03-18T04:30:01+00:00implement function to check usb connection2021-03-18T04:30:01+00:00microDev70126934+microDev1@users.noreply.github.com2021-03-18T04:30:01+00:00urn:sha1:bd95914e887fc3d92b9ee7f7ca8fef32fe25a578run code formatting script2021-03-15T13:57:36+00:00microDev70126934+microDev1@users.noreply.github.com2021-03-15T13:57:36+00:00urn:sha1:a52eb88031620a81521b937f2a0651dbac2bb350merge from upstream; complicated webusb merge2021-02-11T23:50:02+00:00Dan Halberthalbert@halwitz.org2021-02-11T23:50:02+00:00urn:sha1:f0564b49862eaef0b9752b62d80ef00e3e12a3eewip2021-02-08T15:57:41+00:00Dan Halberthalbert@halwitz.org2021-02-08T15:57:41+00:00urn:sha1:1b7f3d11e73be5cb0f7a97a528fedad87624b97fsome API renaming and bug fixes; fix docs2020-11-25T04:37:05+00:00Dan Halberthalbert@halwitz.org2020-11-25T04:36:59+00:00urn:sha1:f868cc5dd02319957500180541281f41ec0d0573working, but need to avoid deep sleeping too fast before USB ready2020-11-24T03:44:53+00:00Dan Halberthalbert@halwitz.org2020-11-24T03:44:53+00:00urn:sha1:7a45afc54919162df342fab421ed113ff1771d01wip2020-11-23T00:10:09+00:00Dan Halberthalbert@halwitz.org2020-11-23T00:10:09+00:00urn:sha1:a0f1ec3c4a3dd52b11752e10d0dd31202e9c705fwip: ResetReason to microcontroller.cpu2020-11-22T04:29:52+00:00Dan Halberthalbert@halwitz.org2020-11-22T04:29:52+00:00urn:sha1:75559f35ccc946dfd292e25671919e5d5b3bd7a6More API changes2020-10-27T23:18:39+00:00Scott Shawcroftscott@tannewt.org2020-10-15T23:59:29+00:00urn:sha1:85dadf3a561c21e284d5daf42b1b3e367ce7ebc6supervisor: Improve serial connection detection2020-09-17T23:32:06+00:00Jeff Eplerjepler@gmail.com2020-09-03T18:36:15+00:00urn:sha1:28043c94b5ea5f3cce11fa57afa9f3f0141b8dce
These changes remove the caveat from supervisor.runtime.serial_connected.
It appears that _tud_cdc_connected() only tracks explicit changes to the
"DTR" bit, which leads to disconnects not being registered.
Instead:
* when line state is changed explicitly, track the dtr value in
_serial_connected
* when the USB bus is suspended, set _serial_connected to False
Testing performed (using sam e54 xplained): Run a program to show
the state of `serial_connected` on the LED:
```
import digitalio
import supervisor
import board
led = digitalio.DigitalInOut(board.LED)
while True:
led.switch_to_output(not supervisor.runtime.serial_connected)
```
Try all the following:
* open, close serial terminal program
- LED status tracks whether terminal is open
* turn on/off data lines using the switchable charge-only cable
- LED turns off when switch is in "charger" position
- LED turns back on when switch is in Data position and terminal is
opened (but doesn't turn back on just because switch position is
changed)