most example works with ch32: hid,msc,midi though mouse_ramdisk does …

…not.

examples/CDC/no_serial/no_serial.ino

@@ -23,6 +23,11 @@ int led = LED_BUILTIN;
 
 void setup()
 {
+  // Manual begin() is required on core without built-in support e.g. mbed rp2040
+  if (!TinyUSBDevice.isInitialized()) {
+    TinyUSBDevice.begin(0);
+  }
+
   // clear configuration will remove all USB interfaces including CDC (Serial)
   TinyUSBDevice.clearConfiguration();
 
@@ -31,8 +36,16 @@ void setup()
 
 void loop()
 {
-  digitalWrite(led, HIGH);
-  delay(1000);
-  digitalWrite(led, LOW);
-  delay(1000);
+  #ifdef TINYUSB_NEED_POLLING_TASK
+  // Manual call tud_task since it isn't called by Core's background
+  TinyUSBDevice.task();
+  #endif
+
+  // toggle LED
+  static uint32_t ms = 0;
+  static uint8_t led_state = 0;
+  if (millis() - ms > 1000) {
+    ms = millis();
+    digitalWrite(LED_BUILTIN, 1-led_state);
+  }
 }

examples/Composite/mouse_ramdisk/mouse_ramdisk.ino

@@ -23,6 +23,7 @@
 // 8KB is the smallest size that windows allow to mount
 #define DISK_BLOCK_NUM  16
 #define DISK_BLOCK_SIZE 512
+
 #include "ramdisk.h"
 
 Adafruit_USBD_MSC usb_msc;
@@ -41,37 +42,41 @@ uint8_t const desc_hid_report[] = {
 Adafruit_USBD_HID usb_hid;
 
 #if defined(ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS) || defined(ARDUINO_NRF52840_CIRCUITPLAY)
-  const int pin = 4; // Left Button
-  bool activeState = true;
+const int pin = 4; // Left Button
+bool activeState = true;
 
 #elif defined(ARDUINO_FUNHOUSE_ESP32S2)
-  const int pin = BUTTON_DOWN;
-  bool activeState = true;
+const int pin = BUTTON_DOWN;
+bool activeState = true;
 
 #elif defined PIN_BUTTON1
-  const int pin = PIN_BUTTON1;
-  bool activeState = false;
+const int pin = PIN_BUTTON1;
+bool activeState = false;
 
 #elif defined(ARDUINO_ARCH_ESP32)
-  const int pin = 0;
-  bool activeState = false;
+const int pin = 0;
+bool activeState = false;
+
+#elif defined(ARDUINO_ARCH_RP2040)
+const int pin = D0;
+bool activeState = false;
 
 #else
-  const int pin = 12;
-  bool activeState = false;
+const int pin = A0;
+bool activeState = false;
 #endif
 
+
 // the setup function runs once when you press reset or power the board
-void setup()
-{
-#if defined(ARDUINO_ARCH_MBED) && defined(ARDUINO_ARCH_RP2040)
-  // Manual begin() is required on core without built-in support for TinyUSB such as mbed rp2040
-  TinyUSB_Device_Init(0);
-#endif
+void setup() {
+  // Manual begin() is required on core without built-in support e.g. mbed rp2040
+  if (!TinyUSBDevice.isInitialized()) {
+    TinyUSBDevice.begin(0);
+  }
 
   // Set disk vendor id, product id and revision with string up to 8, 16, 4 characters respectively
   usb_msc.setID("Adafruit", "Mass Storage", "1.0");
-  
+
   // Set disk size
   usb_msc.setCapacity(DISK_BLOCK_NUM, DISK_BLOCK_SIZE);
 
@@ -80,7 +85,7 @@ void setup()
 
   // Set Lun ready (RAM disk is always ready)
   usb_msc.setUnitReady(true);
-  
+
   usb_msc.begin();
 
   // Set up button
@@ -93,32 +98,23 @@ void setup()
   usb_hid.begin();
 
   Serial.begin(115200);
-  while( !TinyUSBDevice.mounted() ) delay(1);   // wait for native usb
-
   Serial.println("Adafruit TinyUSB Mouse + Mass Storage (ramdisk) example");
 }
 
-void loop()
-{
-  // poll gpio once each 10 ms
-  delay(10);
-
+void process_hid() {
   // button is active low
   uint32_t const btn = (digitalRead(pin) == activeState);
 
   // Remote wakeup
-  if ( TinyUSBDevice.suspended() && btn )
-  {
+  if (TinyUSBDevice.suspended() && btn) {
     // Wake up host if we are in suspend mode
     // and REMOTE_WAKEUP feature is enabled by host
     tud_remote_wakeup();
   }
 
   /*------------- Mouse -------------*/
-  if ( usb_hid.ready() )
-  {
-    if ( btn )
-    {
+  if (usb_hid.ready()) {
+    if (btn) {
       int8_t const delta = 5;
       usb_hid.mouseMove(0, delta, delta); // no ID: right + down
 
@@ -128,11 +124,29 @@ void loop()
   }
 }
 
+void loop() {
+  #ifdef TINYUSB_NEED_POLLING_TASK
+  // Manual call tud_task since it isn't called by Core's background
+  TinyUSBDevice.task();
+  #endif
+
+  // not enumerated()/mounted() yet: nothing to do
+  if (!TinyUSBDevice.mounted()) {
+    return;
+  }
+
+  // poll gpio once each 10 ms
+  static uint32_t ms = 0;
+  if (millis() - ms > 10) {
+    ms = millis();
+    process_hid();
+  }
+}
+
 // Callback invoked when received READ10 command.
 // Copy disk's data to buffer (up to bufsize) and 
 // return number of copied bytes (must be multiple of block size) 
-int32_t msc_read_cb (uint32_t lba, void* buffer, uint32_t bufsize)
-{
+int32_t msc_read_cb(uint32_t lba, void* buffer, uint32_t bufsize) {
   uint8_t const* addr = msc_disk[lba];
   memcpy(buffer, addr, bufsize);
 
@@ -142,8 +156,7 @@ int32_t msc_read_cb (uint32_t lba, void* buffer, uint32_t bufsize)
 // Callback invoked when received WRITE10 command.
 // Process data in buffer to disk's storage and 
 // return number of written bytes (must be multiple of block size)
-int32_t msc_write_cb (uint32_t lba, uint8_t* buffer, uint32_t bufsize)
-{
+int32_t msc_write_cb(uint32_t lba, uint8_t* buffer, uint32_t bufsize) {
   uint8_t* addr = msc_disk[lba];
   memcpy(addr, buffer, bufsize);
 
@@ -152,7 +165,6 @@ int32_t msc_write_cb (uint32_t lba, uint8_t* buffer, uint32_t bufsize)
 
 // Callback invoked when WRITE10 command is completed (status received and accepted by host).
 // used to flush any pending cache.
-void msc_flush_cb (void)
-{
+void msc_flush_cb(void) {
   // nothing to do
 }