merge device_info into bare_api example

examples/host/bare_api/src/main.c

@@ -46,8 +46,6 @@ int main(void)
   board_init();
 
   printf("TinyUSB Host HID Controller Example\r\n");
-  printf("Note: Events only displayed for explictly supported controllers\r\n");
-
   tusb_init();
 
   while (1)
@@ -64,10 +62,74 @@ int main(void)
 // TinyUSB Callbacks
 //--------------------------------------------------------------------+
 
-uint8_t usb_buf[256] TU_ATTR_ALIGNED(4);
+// English
+#define LANGUAGE_ID 0x0409
 
+//uint8_t usb_buf[256] TU_ATTR_ALIGNED(4);
 tusb_desc_device_t desc_device;
 
+static volatile xfer_result_t _get_string_result;
+
+static bool _transfer_done_cb(uint8_t daddr, tusb_control_request_t const *request, xfer_result_t result) {
+    (void)daddr;
+    (void)request;
+    _get_string_result = result;
+    return true;
+}
+
+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 _wait_and_convert(uint16_t *temp_buf, size_t buf_len) {
+    while (_get_string_result == 0xff) {
+        tuh_task();
+    }
+    if (_get_string_result != XFER_RESULT_SUCCESS) {
+        temp_buf[0] = 0;
+        return;
+    }
+    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';
+}
+
 bool print_device_descriptor(uint8_t daddr, tusb_control_request_t const * request, xfer_result_t result)
 {
   (void) request;
@@ -78,26 +140,49 @@ bool print_device_descriptor(uint8_t daddr, tusb_control_request_t const * reque
     return false;
   }
 
-  printf("Rhport %u Device %u: ID %04x:%04x\r\n", 0, daddr, desc_device.idVendor, desc_device.idProduct);
+  printf("Device %u: ID %04x:%04x\r\n", daddr, desc_device.idVendor, desc_device.idProduct);
   printf("Device Descriptor:\r\n");
-  printf("  bLength             %u\r\n", desc_device.bLength);
-  printf("  bDescriptorType     %u\r\n", desc_device.bDescriptorType);
-  printf("  bcdUSB              %04x\r\n", desc_device.bcdUSB);
-
-  printf("  bDeviceClass        %u\r\n", desc_device.bDeviceClass);
-  printf("  bDeviceSubClass     %u\r\n", desc_device.bDeviceSubClass);
-  printf("  bDeviceProtocol     %u\r\n", desc_device.bDeviceProtocol);
-  printf("  bMaxPacketSize0     %u\r\n", desc_device.bMaxPacketSize0);
-
-  printf("  idVendor            0x%04x\r\n", desc_device.idVendor);
-  printf("  idProduct           0x%04x\r\n", desc_device.idProduct);
-  printf("  bcdDevice           %04x\r\n", desc_device.bcdDevice);
-
-  printf("  iManufacturer       %u\r\n", desc_device.iManufacturer);
-  printf("  iProduct            %u\r\n", desc_device.iProduct);
-  printf("  iSerialNumber       %u\r\n", desc_device.iSerialNumber);
+  printf("  bLength             %u\r\n"     , desc_device.bLength);
+  printf("  bDescriptorType     %u\r\n"     , desc_device.bDescriptorType);
+  printf("  bcdUSB              %04x\r\n"   , desc_device.bcdUSB);
+  printf("  bDeviceClass        %u\r\n"     , desc_device.bDeviceClass);
+  printf("  bDeviceSubClass     %u\r\n"     , desc_device.bDeviceSubClass);
+  printf("  bDeviceProtocol     %u\r\n"     , desc_device.bDeviceProtocol);
+  printf("  bMaxPacketSize0     %u\r\n"     , desc_device.bMaxPacketSize0);
+  printf("  idVendor            0x%04x\r\n" , desc_device.idVendor);
+  printf("  idProduct           0x%04x\r\n" , desc_device.idProduct);
+  printf("  bcdDevice           %04x\r\n"   , desc_device.bcdDevice);
+
+  _get_string_result = 0xff;
+  uint16_t temp_buf[128];
+
+  printf("  iManufacturer       %u     "     , desc_device.iManufacturer);
+  temp_buf[0] = 0;
+  if (tuh_descriptor_get_manufacturer_string(daddr, LANGUAGE_ID, temp_buf, TU_ARRAY_SIZE(temp_buf), _transfer_done_cb)) {
+    _wait_and_convert(temp_buf, TU_ARRAY_SIZE(temp_buf));
+    printf((const char*) temp_buf);
+  }
+  printf("\r\n");
+
+  printf("  iProduct            %u     "     , desc_device.iProduct);
+  _get_string_result = 0xff;
+  temp_buf[0] = 0;
+  if (tuh_descriptor_get_product_string(daddr, LANGUAGE_ID, temp_buf, TU_ARRAY_SIZE(temp_buf), _transfer_done_cb)) {
+    _wait_and_convert(temp_buf, TU_ARRAY_SIZE(temp_buf));
+    printf((const char*) temp_buf);
+  }
+  printf("\r\n");
+
+  printf("  iSerialNumber       %u     "     , desc_device.iSerialNumber);
+  _get_string_result = 0xff;
+  temp_buf[0] = 0;
+  if (tuh_descriptor_get_serial_string(daddr, LANGUAGE_ID, temp_buf, TU_ARRAY_SIZE(temp_buf), _transfer_done_cb)) {
+    _wait_and_convert(temp_buf, TU_ARRAY_SIZE(temp_buf));
+    printf((const char*) temp_buf);
+  }
+  printf("\r\n");
 
-  printf("  bNumConfigurations  %u\r\n", desc_device.bNumConfigurations);
+  printf("  bNumConfigurations  %u\r\n"     , desc_device.bNumConfigurations);
 
   return true;
 }
@@ -107,7 +192,7 @@ void tuh_mount_cb (uint8_t daddr)
 {
   printf("Device attached, address = %d\r\n", daddr);
 
-  // get device descriptor
+  // Get Device Descriptor
   tuh_descriptor_get_device(daddr, &desc_device, 18, print_device_descriptor);
 }