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I have used TinyProg on Linux before to program the TinyFPGA-BX board just fine, but I am having issues with macOS on an M1 Powerbook. Apio finds the serial device just fine:

apio system --lsserial

Number of Serial devices found: 1
/dev/cu.usbmodem13201
Description: IOUSBHostDevice
Hardware info: USB VID:PID=0483:5740 LOCATION=0-1.3.2

But when I do the following to list serial devices with TinyProg, I get this:

tinyprog -d 0483:5740 -c /dev/cu.usbmodem13201 -l

TinyProg CLI
------------
Using device id 0483:5740
Boards with active bootloaders:
    No active bootloaders found.  Check USB connections
    and press reset button to activate bootloader.

The board works fine on Linux and has a bootloader. I tried updating the bootloader (on macos), but it states it is up-to-date. i.e

tinyprog -d 0483:5740 -c /dev/cu.usbmodem13201 --update-bootloader

TinyProg CLI
------------
Using device id 0483:5740
All connected and active boards are up to date!

Any ideas anyone?

A thought? I do have issues with USB running at full speed on the M1, is there a way to slow it down for Tinyprog?

Update

Seems using the --pyserial option to tinyprog works. It takes about a minute to start working, but it works ..I do wonder if it is a speed/cable thing .. using the --libusb option results in a programming attempt, but a failure in verify ..

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  • \$\begingroup\$ Your suggestion in the update to add --pyserial worked for me, thanks! \$\endgroup\$ Commented Aug 20, 2024 at 19:31

1 Answer 1

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I'm having the same problem setting up my toolchain on MacBook Air M2.

I do found a workaround but have no clue why it works. Hope someone who understands pyusb more can explain or find a real solution for this.

Go to your tinyprog package __init__.py and comment out if not d.is_kernel_driver_active(1)

def get_ports(device_id):
    ...
    if platform.system() == "Darwin" or use_libusb:
        import usb
        vid, pid = [int(x, 16) for x in device_id.split(":")]
        ports += [
            UsbPort(d)
            for d in usb.core.find(idVendor=vid, idProduct=pid, find_all=True)
            # if not d.is_kernel_driver_active(1)
        ]
    ...

for me the file is at .venv/lib/python3.11/site-packages/tinyprog/__init__.py

I have successfully upload my program into my TinyFpga BX after remove this check.

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  • \$\begingroup\$ thank you StoneLin, your solution worked for me, I am on a x86 MacBook Pro running Sequoia 15.2 \$\endgroup\$ Commented Jan 22 at 0:40

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