MicroPython Forum (Archive)

nedkonz

I have an application that needs to send HID reports (joystick) when connected to a computer, but still has to work when not connected to a computer. My Pyboard V1.1 is always powered from an external 5V power supply connected to V+. However, when I start my program and it tries to send the first HI...

nedkonz

Printing from an interrupt handler is problematic. Try removing your print statements or moving them to your main loop.

nedkonz

Thanks. I just made a simple 3-axis (X,Y,Z) joystick emulator. Here's my code in boot.py: # simple joystick with 8-bit x,y,z pyb.usb_mode('VCP+HID', hid=(1, 2, 3, 8, bytes([0x05, 0x01, 0x09, 0x04, 0xa1, 0x01, 0x09, 0x01, 0xa1, 0x00, 0x09, 0x30, 0x09, 0x31, 0x09, 0x32, 0x25, 0x7f, 0x15, 0x81, 0x75, 0...

nedkonz

I just made a simple 3-axis (X,Y,Z) joystick emulator. Here's my code in boot.py: # simple joystick with 8-bit x,y,z pyb.usb_mode('VCP+HID', hid=(1, 2, 3, 8, bytes([0x05, 0x01, 0x09, 0x04, 0xa1, 0x01, 0x09, 0x01, 0xa1, 0x00, 0x09, 0x30, 0x09, 0x31, 0x09, 0x32, 0x25, 0x7f, 0x15, 0x81, 0x75, 0x08, 0x9...

nedkonz

Thanks!

I figured out what happened: I had a blank micro SD card installed, and therefore my /flash/boot.py wasn't being loaded.

Now to figure out how to set up the descriptor for a joystick...

nedkonz

You need to change usb_mode in boot.py. Changing it in main.py or later (like in the REPL) has no effect. I've done this and it doesn't work. Here's my boot.py: # boot.py -- run on boot-up import pyb pyb.country('US') # ISO 3166-1 Alpha-2 code, eg US, GB, DE, AU #pyb.main('main.py') # main script t...

nedkonz

Openned Python 3.6 and input "import pyb". reply: ModuleNotFoundError: No module named 'pyb'. What am I doing wrong? You're opening Python on your PC, for one thing. You need to talk to the MicroPython on the pyboard instead, over the USB serial link. For this you need a communications program.

nedkonz

I have a Pyboard v1.1 and have loaded firmware v1.17. When I do this: >>> import pyb >>> pyb.usb_mode() 'VCP+MSC' >>> pyb.usb_mode('VCP+HID') >>> pyb.usb_mode() 'VCP+MSC' I see that the usb mode has not changed. Am I missing something obvious? Should this work? I have also tried this code in boot.py...

nedkonz

This seems to work:

Code: Select all

STATIC inline stepper* get_stepper_struct(mp_obj_t str) {
    mp_buffer_info_t bufinfo;
    mp_get_buffer_raise(str, &bufinfo, MP_BUFFER_READ);
    return (stepper *)(bufinfo.buf);
}

   stepper *s = get_stepper_struct(mp_load_attr(self, MP_QSTR__s));

nedkonz

I have a uctypes.struct() structure that I'm holding in an object attribute (called _s ) that's being passed to a C function (a timer callback). In the C function I'm doing this to get the pointer to the structure: size_t len; stepper *s = (stepper *)mp_obj_str_get_data(mp_load_attr(self, MP_QSTR__s...

MicroPython Forum (Archive)

Search found 24 matches

Hard fault when using USB HID with no USB connection

Re: Why cant I escape this function?

Re: Can't use VCP+HID mode

Re: emulating joystick USB-HID

Re: Can't use VCP+HID mode

Re: Can't use VCP+HID mode

Re: MicroPython startup, No flash drive

Can't use VCP+HID mode

Re: how to access a uctypes.struct in a C function?

how to access a uctypes.struct in a C function?