I am trying to get BootloadHID working on my atmega324P, and it does not seem to work. A dmesg returns a long long list of this:
[ 7113.100044] hub 4-0:1.0: unable to enumerate USB device on port 2
[ 7114.028509] usb 4-2: new low speed USB device using uhci_hcd and address 37
[ 7114.092036] hub 4-0:1.0: unable to enumerate USB device on port 2
[ 7115.020013] usb 4-2: new low speed USB device using uhci_hcd and address 38
[ 7115.084763] hub 4-0:1.0: unable to enumerate USB device on port 2
[ 7116.016010] usb 4-2: new low speed USB device using uhci_hcd and address 39
I have looked through threads with similar problems so I will summarize my key things.
atmega324p on 5 volts, 16 MHz external crystal
1k8 pullup from D-
300 mW zener diodes BZX384 (C3V6) from ground to D+ and D-
#define USB_CFG_DMINUS_BIT 3 (PD3 INT1)
#define USB_CFG_DPLUS_BIT 2 (PD2 INT0)
68 Ohm between D and pins
This is the circuit I copied.
I know for sure that the bootloader enters and stays in the "main event loop" because I have it turning on some LEDs
Do you have any suggestions on what the problem might be?
Thank you