rp2040 host work as proof of concept

Author: hathach

examples/DualRole/device_info_rp2040/device_info_rp2040.ino

@@ -15,9 +15,14 @@
 
 #include "Adafruit_TinyUSB.h"
 
+#define LANGUAGE_ID 0x0409  // English
+
 // USB Host object
 Adafruit_USBH_Host USBHost;
 
+// holding device descriptor
+tusb_desc_device_t desc_device;
+
 // the setup function runs once when you press reset or power the board
 void setup()
 {
@@ -27,33 +32,12 @@ void setup()
   //while ( !Serial ) delay(10);   // wait for native usb
 
   Serial.println("TinyUSB Dual Device Info Example");
-
-  // Check for CPU frequency, must be multiple of 120Mhz for bit-banging USB
-  uint32_t cpu_hz = clock_get_hz(clk_sys);
-  if ( cpu_hz != 120000000UL && cpu_hz != 240000000UL ) {
-    while ( !Serial ) delay(10);   // wait for native usb
-    Serial.printf("Error: CPU Clock = %u, PIO USB require CPU clock must be multiple of 120 Mhz\r\n", cpu_hz);
-    Serial.printf("Change your CPU Clock to either 120 or 240 Mhz in Menu->CPU Speed \r\n", cpu_hz);
-    while(1) delay(1);
-  }
-
-  pio_usb_configuration_t pio_cfg = PIO_USB_DEFAULT_CONFIG;
-  pio_cfg.pin_dp = HOST_PIN_DP;
-  USBHost.configure_pio_usb(1, &pio_cfg);
-
-  // run host stack on controller (rhport) 1
-  // Note: For rp2040 pico-pio-usb, calling USBHost.begin() on core1 will have most of the
-  // host bit-banging processing works done in core1 to free up core0 for other works
-  USBHost.begin(1);
 }
 
 void loop()
 {
-  USBHost.task();
 }
 
-#if 0
-
 // core1's setup
 void setup1() {
   //while ( !Serial ) delay(10);   // wait for native usb
@@ -84,5 +68,127 @@ void loop1()
   USBHost.task();
 }
 
-#endif
+//--------------------------------------------------------------------+
+// TinyUSB Host callbacks
+//--------------------------------------------------------------------+
+
+// Invoked when device is mounted (configured)
+void tuh_mount_cb (uint8_t daddr)
+{
+  Serial.printf("Device attached, address = %d\r\n", daddr);
+
+  // Get Device Descriptor
+  tuh_descriptor_get_device(daddr, &desc_device, 18, print_device_descriptor, 0);
+}
+
+/// Invoked when device is unmounted (bus reset/unplugged)
+void tuh_umount_cb(uint8_t daddr)
+{
+  Serial.printf("Device removed, address = %d\r\n", daddr);
+}
+
+void print_device_descriptor(tuh_xfer_t* xfer)
+{
+  if ( XFER_RESULT_SUCCESS != xfer->result )
+  {
+    Serial.printf("Failed to get device descriptor\r\n");
+    return;
+  }
+
+  uint8_t const daddr = xfer->daddr;
+
+  Serial.printf("Device %u: ID %04x:%04x\r\n", daddr, desc_device.idVendor, desc_device.idProduct);
+  Serial.printf("Device Descriptor:\r\n");
+  Serial.printf("  bLength             %u\r\n"     , desc_device.bLength);
+  Serial.printf("  bDescriptorType     %u\r\n"     , desc_device.bDescriptorType);
+  Serial.printf("  bcdUSB              %04x\r\n"   , desc_device.bcdUSB);
+  Serial.printf("  bDeviceClass        %u\r\n"     , desc_device.bDeviceClass);
+  Serial.printf("  bDeviceSubClass     %u\r\n"     , desc_device.bDeviceSubClass);
+  Serial.printf("  bDeviceProtocol     %u\r\n"     , desc_device.bDeviceProtocol);
+  Serial.printf("  bMaxPacketSize0     %u\r\n"     , desc_device.bMaxPacketSize0);
+  Serial.printf("  idVendor            0x%04x\r\n" , desc_device.idVendor);
+  Serial.printf("  idProduct           0x%04x\r\n" , desc_device.idProduct);
+  Serial.printf("  bcdDevice           %04x\r\n"   , desc_device.bcdDevice);
+
+  // Get String descriptor using Sync API
+  uint16_t temp_buf[128];
+  uint8_t result;
+
+  Serial.printf("  iManufacturer       %u     "     , desc_device.iManufacturer);
+  if (XFER_RESULT_SUCCESS == tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, temp_buf, sizeof(temp_buf)) )
+  {
+    TU_LOG2_ARR(temp_buf, sizeof(temp_buf));
+    print_utf16(temp_buf, TU_ARRAY_SIZE(temp_buf));
+  }
+  Serial.printf("\r\n");
+
+  Serial.printf("  iProduct            %u     "     , desc_device.iProduct);
+  if (XFER_RESULT_SUCCESS == tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, temp_buf, sizeof(temp_buf)))
+  {
+    print_utf16(temp_buf, TU_ARRAY_SIZE(temp_buf));
+  }
+  Serial.printf("\r\n");
+
+  Serial.printf("  iSerialNumber       %u     "     , desc_device.iSerialNumber);
+  if (XFER_RESULT_SUCCESS == tuh_descriptor_get_serial_string_sync(daddr, LANGUAGE_ID, temp_buf, sizeof(temp_buf)))
+  {
+    print_utf16(temp_buf, TU_ARRAY_SIZE(temp_buf));
+  }
+  Serial.printf("\r\n");
+
+  Serial.printf("  bNumConfigurations  %u\r\n"     , desc_device.bNumConfigurations);
+}
+
+//--------------------------------------------------------------------+
+// String Descriptor Helper
+//--------------------------------------------------------------------+
+
+static void _convert_utf16le_to_utf8(const uint16_t *utf16, size_t utf16_len, uint8_t *utf8, size_t utf8_len) {
+  // TODO: Check for runover.
+  (void)utf8_len;
+  // Get the UTF-16 length out of the data itself.
+
+  for (size_t i = 0; i < utf16_len; i++) {
+    uint16_t chr = utf16[i];
+    if (chr < 0x80) {
+      *utf8++ = chr & 0xff;
+    } else if (chr < 0x800) {
+      *utf8++ = (uint8_t)(0xC0 | (chr >> 6 & 0x1F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    } else {
+      // TODO: Verify surrogate.
+      *utf8++ = (uint8_t)(0xE0 | (chr >> 12 & 0x0F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 6 & 0x3F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+}
+
+// Count how many bytes a utf-16-le encoded string will take in utf-8.
+static int _count_utf8_bytes(const uint16_t *buf, size_t len) {
+  size_t total_bytes = 0;
+  for (size_t i = 0; i < len; i++) {
+    uint16_t chr = buf[i];
+    if (chr < 0x80) {
+      total_bytes += 1;
+    } else if (chr < 0x800) {
+      total_bytes += 2;
+    } else {
+      total_bytes += 3;
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+  return total_bytes;
+}
+
+static void print_utf16(uint16_t *temp_buf, size_t buf_len) {
+  size_t utf16_len = ((temp_buf[0] & 0xff) - 2) / sizeof(uint16_t);
+  size_t utf8_len = _count_utf8_bytes(temp_buf + 1, utf16_len);
+
+  _convert_utf16le_to_utf8(temp_buf + 1, utf16_len, (uint8_t *) temp_buf, sizeof(uint16_t) * buf_len);
+  ((uint8_t*) temp_buf)[utf8_len] = '\0';
+
+  Serial.printf((char*)temp_buf);
+}
 

src/arduino/ports/rp2040/tusb_config_rp2040.h

@@ -98,7 +98,10 @@ extern "C" {
 // max device support (excluding hub device)
 #define CFG_TUH_DEVICE_MAX          (CFG_TUH_HUB ? 4 : 1) // hub typically has 4 ports
 
-#define CFG_TUH_HID                  4
+// Enable tuh_edpt_xfer() API
+//#define CFG_TUH_API_EDPT_XFER       1
+
+#define CFG_TUH_HID                 4
 
 #ifdef __cplusplus
 }