nrf52840

[pwilkowski]

Operating System

Windows 10

Arduino IDE version

PlatformIO Core, version 6.1.7

Board

nrf52840 DK

ArduinoCore version

n-able-Arduino 0.1.1

TinyUSB Library version

adafruit/Adafruit TinyUSB Library@^2.2.1

Sketch as ATTACHED TXT

#include "USB.h"

uint8_t const desc_hid_report[] = {TUD_HID_REPORT_DESC_GENERIC_INOUT(64)};

Adafruit_USBD_HID* usb_hid;

uint16_t get_report_callback(uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen) {
    // not used in this example
    (void)report_id;
    (void)report_type;
    (void)buffer;
    (void)reqlen;
    return 0;
}

// Invoked when received SET_REPORT control request or
// received data on OUT endpoint ( Report ID = 0, Type = 0 )
void set_report_callback(uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize) {
    // This example doesn't use multiple report and report ID
    (void)report_id;
    (void)report_type;

    // echo back anything we received from host
    usb_hid->sendReport(0, buffer, bufsize);
}

void USB::init() {
    usb_hid = new Adafruit_USBD_HID(desc_hid_report, sizeof(desc_hid_report), HID_ITF_PROTOCOL_NONE, 2, true);
    usb_hid->setReportCallback(get_report_callback, set_report_callback);
    usb_hid->setPollInterval(10);
    usb_hid->setReportDescriptor(desc_hid_report, sizeof(desc_hid_report));
    usb_hid->setStringDescriptor("Some Device");

    if (usb_hid->begin()) {
        while (!TinyUSBDevice.mounted()) {
            delay(1);
        }
        Serial.println("USB initialized!");
    }
    else {
        Serial.println("USB failed!");
    }
}

void USB::write(uint8_t* data, int len) {
}

Compiled Log as ATTACHED TXT

There is no log as there is no error, usb simple hid in out example simply fails at if (usb_hid->begin()) { and returns false

What happened ?

I have dug deeper and it seems like this is the problem Adafruit_USBD_Device.cpp

function bool Adafruit_USBD_Device::addInterface(Adafruit_USBD_Interface &itf) {

around the code

    if (desc[0] == 0) {
      Serial.printf("Failx2 %d", desc_end);
      return false;
    }

desc_end returns 32 so this is probably some trivial problem or perhaps a lack of define?

How to reproduce ?

1. Create project in platformio with following config:

   [env:nrf52840_dk]
   platform = n-able
   board = nrf52840_dk
   framework = arduino
   monitor_port = COM5
   monitor_speed = 115200
   lib_deps =
   https://github.com/h2zero/NimBLE-Arduino.git
   adafruit/Adafruit TinyUSB Library@^2.2.1
   build_flags =
   -DARDUINO_NRF52_ADAFRUIT=1
   -DCFG_TUSB_OS_INC_PATH="freertos/"
   -DCFG_TUD_ENABLED=1
   -DCFG_TUD_HID=2
   -DCFG_TUSB_RHPORT0_MODE=0x0001
   -DTASK_PRIO_HIGH=4

2. Make Cpp/H file named USB.h, USB.cpp, create empty header with simple include

   #include <Arduino.h>
   #include "Adafruit_TinyUSB.h"

3. Copy contents of the file i attached at the beginning to USB.cpp

4. In main setup. Execute USB::init();

Debug Log

Failx2 32USB failed!

Screenshots

No response

[hathach]

There is lot of not supported

• n-able core not supported
• board is not officially supported
• PIO is not supported.

[pwilkowski]

For sure, however n-able core literally includes tinyusb in it, I did try it before, now im checking updated version. I do not think this is an issue of any of those as simply buffer seems to be empty, so my best bet is that i am missing something?

[hathach]

For above platform/board/IDE, you should ask them for support. I don't use any of those and won't be able to provide any info.

[pwilkowski]

Ok so last question, perhaps this may make those things clearer:

Inside function

// Add interface descriptor
// - Interface number will be updated to match current count
// - Endpoint number is updated to be unique
bool Adafruit_USBD_Device::addInterface(Adafruit_USBD_Interface &itf) {
  uint8_t *desc = _desc_cfg + _desc_cfg_len;
  Serial.printf("sizes: %d %d\n",_desc_cfg_maxlen, _desc_cfg_len);

I have placed simple debug, both _desc_cfg_maxlen and _desc_cfg_len are zero. Where/how can i configure them? Imo it doesnt have anything to do with board platform or ide.