move report_info to application

update API accordingly, update hid parser for usage, and usage_page.

examples/host/cdc_msc_hid/src/hid_app.c

@@ -0,0 +1,209 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#include "bsp/board.h"
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+#define MAX_REPORT  4
+
+static uint8_t const keycode2ascii[128][2] =  { HID_KEYCODE_TO_ASCII };
+
+static uint8_t _report_count[CFG_TUH_HID];
+static tuh_hid_report_info_t _report_info[CFG_TUH_HID][MAX_REPORT];
+
+static void process_kbd_report(hid_keyboard_report_t const *report);
+static void process_mouse_report(hid_mouse_report_t const * report);
+
+void hid_app_task(void)
+{
+}
+
+//--------------------------------------------------------------------+
+// TinyUSB Callbacks
+//--------------------------------------------------------------------+
+
+void tuh_hid_mounted_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
+{
+  printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
+
+  // Parse report descriptor with built-in parser
+  _report_count[instance] = tuh_hid_parse_report_descriptor(_report_info[instance], MAX_REPORT, desc_report, desc_len);
+
+  if (_report_count[instance])
+  {
+    printf("Composite with %u reports", _report_count[instance]);
+  }else
+  {
+    printf("Single report");
+  }
+
+  // Interface protocol
+  const char* protocol_str[] = { "None", "Keyboard", "Mouse" }; // hid_protocol_type_t
+  uint8_t const interface_protocol = tuh_n_hid_n_interface_protocol(dev_addr, instance);
+  printf(", Interface protocol = %s, ", protocol_str[interface_protocol]);
+}
+
+void tuh_hid_unmounted_cb(uint8_t dev_addr, uint8_t instance)
+{
+  printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
+}
+
+void tuh_hid_get_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
+{
+  uint8_t const rpt_count = _report_count[instance];
+  tuh_hid_report_info_t* rpt_info;
+
+  if (rpt_count)
+  {
+    // Composite report, 1st byte is report ID, data starts from 2nd byte
+    // Note: report index = report ID - 1
+    uint8_t idx = report[0] - 1;
+    rpt_info = &_report_info[instance][idx];
+
+    report++;
+  }else
+  {
+    rpt_info = &_report_info[instance][0];
+  }
+
+  if ( rpt_info->usage_page == HID_USAGE_PAGE_DESKTOP )
+  {
+    switch (rpt_info->usage)
+    {
+      case HID_USAGE_DESKTOP_KEYBOARD:
+        TU_LOG1("HID receive keyboard report\r\n");
+        // Assume keyboard follow boot report layout
+        process_kbd_report( (hid_keyboard_report_t const*) report );
+      break;
+
+      case HID_USAGE_DESKTOP_MOUSE:
+        TU_LOG1("HID receive mouse report\r\n");
+        // Assume mouse follow boot report layout
+        process_mouse_report( (hid_mouse_report_t const*) report );
+      break;
+
+      default: break;
+    }
+  }
+}
+
+//--------------------------------------------------------------------+
+// Keyboard
+//--------------------------------------------------------------------+
+
+// look up new key in previous keys
+static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8_t keycode)
+{
+  for(uint8_t i=0; i<6; i++)
+  {
+    if (report->keycode[i] == keycode)  return true;
+  }
+
+  return false;
+}
+
+static void process_kbd_report(hid_keyboard_report_t const *report)
+{
+  static hid_keyboard_report_t prev_report = { 0, 0, {0} }; // previous report to check key released
+
+  //------------- example code ignore control (non-printable) key affects -------------//
+  for(uint8_t i=0; i<6; i++)
+  {
+    if ( report->keycode[i] )
+    {
+      if ( find_key_in_report(&prev_report, report->keycode[i]) )
+      {
+        // exist in previous report means the current key is holding
+      }else
+      {
+        // not existed in previous report means the current key is pressed
+        bool const is_shift =  report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
+        uint8_t ch = keycode2ascii[report->keycode[i]][is_shift ? 1 : 0];
+        putchar(ch);
+        if ( ch == '\r' ) putchar('\n'); // added new line for enter key
+
+        fflush(stdout); // flush right away, else nanolib will wait for newline
+      }
+    }
+    // TODO example skips key released
+  }
+
+  prev_report = *report;
+}
+
+//--------------------------------------------------------------------+
+// Mouse
+//--------------------------------------------------------------------+
+
+void cursor_movement(int8_t x, int8_t y, int8_t wheel)
+{
+  // Move X using ansi escape
+  if ( x < 0)
+  {
+    printf(ANSI_CURSOR_BACKWARD(%d), (-x)); // move left
+  }else if ( x > 0)
+  {
+    printf(ANSI_CURSOR_FORWARD(%d), x); // move right
+  }
+
+  // Move Y using ansi escape
+  if ( y < 0)
+  {
+    printf(ANSI_CURSOR_UP(%d), (-y)); // move up
+  }else if ( y > 0)
+  {
+    printf(ANSI_CURSOR_DOWN(%d), y); // move down
+  }
+
+  // Scroll using ansi escape
+  if (wheel < 0)
+  {
+    printf(ANSI_SCROLL_UP(%d), (-wheel)); // scroll up
+  }else if (wheel > 0)
+  {
+    printf(ANSI_SCROLL_DOWN(%d), wheel); // scroll down
+  }
+}
+
+static void process_mouse_report(hid_mouse_report_t const * report)
+{
+  static hid_mouse_report_t prev_report = { 0 };
+
+  //------------- button state  -------------//
+  uint8_t button_changed_mask = report->buttons ^ prev_report.buttons;
+  if ( button_changed_mask & report->buttons)
+  {
+    printf(" %c%c%c ",
+       report->buttons & MOUSE_BUTTON_LEFT   ? 'L' : '-',
+       report->buttons & MOUSE_BUTTON_MIDDLE ? 'M' : '-',
+       report->buttons & MOUSE_BUTTON_RIGHT  ? 'R' : '-');
+  }
+
+  //------------- cursor movement -------------//
+  cursor_movement(report->x, report->y, report->wheel);
+}

examples/host/cdc_msc_hid/src/main.c

@@ -37,7 +37,7 @@ void print_greeting(void);
 void led_blinking_task(void);
 
 extern void cdc_task(void);
-extern void hid_task(void);
+extern void hid_app_task(void);
 
 /*------------- MAIN -------------*/
 int main(void)
@@ -58,7 +58,7 @@ int main(void)
 #endif
 
 #if CFG_TUH_HID
-    hid_task();
+    hid_app_task();
 #endif
   }
 
@@ -106,127 +106,11 @@ void cdc_task(void)
 #endif
 
 //--------------------------------------------------------------------+
-// USB HID
+// TinyUSB Callbacks
-//--------------------------------------------------------------------+
-uint8_t const keycode2ascii[128][2] =  { HID_KEYCODE_TO_ASCII };
-
-// look up new key in previous keys
-static inline bool find_key_in_report(hid_keyboard_report_t const *p_report, uint8_t keycode)
-{
-  for(uint8_t i=0; i<6; i++)
-  {
-    if (p_report->keycode[i] == keycode)  return true;
-  }
-
-  return false;
-}
-
-static inline void process_kbd_report(hid_keyboard_report_t const *p_new_report)
-{
-  static hid_keyboard_report_t prev_report = { 0, 0, {0} }; // previous report to check key released
-
-  //------------- example code ignore control (non-printable) key affects -------------//
-  for(uint8_t i=0; i<6; i++)
-  {
-    if ( p_new_report->keycode[i] )
-    {
-      if ( find_key_in_report(&prev_report, p_new_report->keycode[i]) )
-      {
-        // exist in previous report means the current key is holding
-      }else
-      {
-        // not existed in previous report means the current key is pressed
-        bool const is_shift =  p_new_report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
-        uint8_t ch = keycode2ascii[p_new_report->keycode[i]][is_shift ? 1 : 0];
-        putchar(ch);
-        if ( ch == '\r' ) putchar('\n'); // added new line for enter key
-
-        fflush(stdout); // flush right away, else nanolib will wait for newline
-      }
-    }
-    // TODO example skips key released
-  }
-
-  prev_report = *p_new_report;
-}
-
-void tuh_hid_mounted_cb(uint8_t dev_addr, uint8_t instance)
-{
-  printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
-//  printf("A Keyboard device (address %d) is mounted\r\n", dev_addr);
-//  printf("A Mouse device (address %d) is mounted\r\n", dev_addr);
-}
-
-void tuh_hid_unmounted_cb(uint8_t dev_addr, uint8_t instance)
-{
-  printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
-//  printf("A Keyboard device (address %d) is unmounted\r\n", dev_addr);
-//  printf("A Mouse device (address %d) is unmounted\r\n", dev_addr);
-}
-
-void cursor_movement(int8_t x, int8_t y, int8_t wheel)
-{
-  //------------- X -------------//
-  if ( x < 0)
-  {
-    printf(ANSI_CURSOR_BACKWARD(%d), (-x)); // move left
-  }else if ( x > 0)
-  {
-    printf(ANSI_CURSOR_FORWARD(%d), x); // move right
-  }else { }
-
-  //------------- Y -------------//
-  if ( y < 0)
-  {
-    printf(ANSI_CURSOR_UP(%d), (-y)); // move up
-  }else if ( y > 0)
-  {
-    printf(ANSI_CURSOR_DOWN(%d), y); // move down
-  }else { }
-
-  //------------- wheel -------------//
-  if (wheel < 0)
-  {
-    printf(ANSI_SCROLL_UP(%d), (-wheel)); // scroll up
-  }else if (wheel > 0)
-  {
-    printf(ANSI_SCROLL_DOWN(%d), wheel); // scroll down
-  }else { }
-}
-
-static inline void process_mouse_report(hid_mouse_report_t const * p_report)
-{
-  static hid_mouse_report_t prev_report = { 0 };
-
-  //------------- button state  -------------//
-  uint8_t button_changed_mask = p_report->buttons ^ prev_report.buttons;
-  if ( button_changed_mask & p_report->buttons)
-  {
-    printf(" %c%c%c ",
-       p_report->buttons & MOUSE_BUTTON_LEFT   ? 'L' : '-',
-       p_report->buttons & MOUSE_BUTTON_MIDDLE ? 'M' : '-',
-       p_report->buttons & MOUSE_BUTTON_RIGHT  ? 'R' : '-');
-  }
-
-  //------------- cursor movement -------------//
-  cursor_movement(p_report->x, p_report->y, p_report->wheel);
-}
-
-void tuh_hid_get_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
-{
-  process_kbd_report( (hid_keyboard_report_t*) report );
-}
-
-void hid_task(void)
-{
-}
-
-//--------------------------------------------------------------------+
-// tinyusb callbacks
 //--------------------------------------------------------------------+
 
 //--------------------------------------------------------------------+
-// BLINKING TASK
+// Blinking Task
 //--------------------------------------------------------------------+
 void led_blinking_task(void)
 {

src/class/hid/hid_host.c

@@ -57,17 +57,9 @@ typedef struct
   uint16_t epin_size;
   uint16_t epout_size;
 
-  uint8_t boot_protocol; // None, Keyboard, Mouse
+  uint8_t boot_interface; // None, Keyboard, Mouse
   bool    boot_mode;      // Boot or Report protocol
 
-  tuh_hid_report_info_t report_info;
-
-  // Parsed Report ID for convenient API
-  uint8_t rid_keyboard;
-  uint8_t rid_mouse;
-  uint8_t rid_gamepad;
-  uint8_t rid_consumer;
-
   uint8_t epin_buf[CFG_TUH_HID_EP_BUFSIZE];
   uint8_t epout_buf[CFG_TUH_HID_EP_BUFSIZE];
 } hidh_interface_t;
@@ -107,49 +99,30 @@ bool tuh_n_hid_n_mounted(uint8_t dev_addr, uint8_t instance)
   return (hid_itf->ep_in != 0) || (hid_itf->ep_out != 0);
 }
 
-uint8_t tuh_n_hid_n_boot_protocol(uint8_t dev_addr, uint8_t instance)
+uint8_t tuh_n_hid_n_interface_protocol(uint8_t dev_addr, uint8_t instance)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
-  return hid_itf->boot_protocol;
+  return hid_itf->boot_interface;
 }
 
-bool tuh_n_hid_n_boot_mode(uint8_t dev_addr, uint8_t instance)
+bool tuh_n_hid_n_get_protocol(uint8_t dev_addr, uint8_t instance)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
   return hid_itf->boot_mode;
 }
 
-tuh_hid_report_info_t const* tuh_n_hid_n_get_report_info(uint8_t dev_addr, uint8_t instance)
+//bool tuh_n_hid_n_set_protocol(uint8_t dev_addr, uint8_t instance, bool boot_mode)
-{
+//{
-  return &get_instance(dev_addr, instance)->report_info;
+//
-}
+//}
 
-bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance)
+//bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance)
-{
+//{
-  TU_VERIFY(tuh_n_hid_n_mounted(dev_addr, instance));
+//  TU_VERIFY(tuh_n_hid_n_mounted(dev_addr, instance));
-
+//
-  hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
+//  hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
-  return !hcd_edpt_busy(dev_addr, hid_itf->ep_in);
+//  return !hcd_edpt_busy(dev_addr, hid_itf->ep_in);
-}
+//}
-
-//--------------------------------------------------------------------+
-// KEYBOARD
-//--------------------------------------------------------------------+
-
-bool tuh_n_hid_n_keyboard_mounted(uint8_t dev_addr, uint8_t instance)
-{
-  hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
-
-  // TODO check rid_keyboard
-  return tuh_device_ready(dev_addr) && (hid_itf->ep_in != 0);
-}
-
-// TODO remove
-bool tuh_n_hid_n_mouse_mounted(uint8_t dev_addr, uint8_t instance)
-{
-  hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
-  return tuh_device_ready(dev_addr) && (hid_itf->ep_in != 0);
-}
 
 //--------------------------------------------------------------------+
 // USBH API
@@ -167,10 +140,9 @@ bool hidh_xfer_cb(uint8_t dev_addr, uint8_t ep_addr, xfer_result_t event, uint32
 
   if ( dir == TUSB_DIR_IN )
   {
-    if (tuh_hid_get_report_cb)
+    TU_LOG2("  Get Report callback (%u, %u)\r\n", dev_addr, instance);
-    {
+    TU_LOG1_MEM(hid_itf->epin_buf, 8, 2);
     tuh_hid_get_report_cb(dev_addr, instance, hid_itf->epin_buf, xferred_bytes);
-    }
 
     // queue next report
     hidh_get_report(dev_addr, hid_itf);
@@ -197,7 +169,6 @@ void hidh_close(uint8_t dev_addr)
 // Enumeration
 //--------------------------------------------------------------------+
 
-static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* desc_report, uint16_t desc_len);
 static bool config_set_idle_complete(uint8_t dev_addr, tusb_control_request_t const * request, xfer_result_t result);
 static bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_request_t const * request, xfer_result_t result);
 
@@ -239,29 +210,29 @@ bool hidh_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *de
   hid_itf->boot_mode = false; // default is report mode
   if ( HID_SUBCLASS_BOOT == desc_itf->bInterfaceSubClass )
   {
-    hid_itf->boot_protocol = desc_itf->bInterfaceProtocol;
+    hid_itf->boot_interface = desc_itf->bInterfaceProtocol;
 
     if ( HID_PROTOCOL_KEYBOARD == desc_itf->bInterfaceProtocol)
     {
       TU_LOG2("  Boot Keyboard\r\n");
       // TODO boot protocol may still have more report in report mode
-      hid_itf->report_info.count = 1;
+//      hid_itf->report_info.count = 1;
 
-      hid_itf->report_info.info[0].usage_page = HID_USAGE_PAGE_DESKTOP;
+//      hid_itf->report_info.info[0].usage_page = HID_USAGE_PAGE_DESKTOP;
-      hid_itf->report_info.info[0].usage = HID_USAGE_DESKTOP_KEYBOARD;
+//      hid_itf->report_info.info[0].usage = HID_USAGE_DESKTOP_KEYBOARD;
-      hid_itf->report_info.info[0].in_len = 8;
+//      hid_itf->report_info.info[0].in_len = 8;
-      hid_itf->report_info.info[0].out_len = 1;
+//      hid_itf->report_info.info[0].out_len = 1;
     }
     else if ( HID_PROTOCOL_MOUSE == desc_itf->bInterfaceProtocol)
     {
       TU_LOG2("  Boot Mouse\r\n");
       // TODO boot protocol may still have more report in report mode
-      hid_itf->report_info.count = 1;
+//      hid_itf->report_info.count = 1;
 
-      hid_itf->report_info.info[0].usage_page = HID_USAGE_PAGE_DESKTOP;
+//      hid_itf->report_info.info[0].usage_page = HID_USAGE_PAGE_DESKTOP;
-      hid_itf->report_info.info[0].usage = HID_USAGE_DESKTOP_MOUSE;
+//      hid_itf->report_info.info[0].usage = HID_USAGE_DESKTOP_MOUSE;
-      hid_itf->report_info.info[0].in_len = 5;
+//      hid_itf->report_info.info[0].in_len = 5;
-      hid_itf->report_info.info[0].out_len = 0;
+//      hid_itf->report_info.info[0].out_len = 0;
     }
     else
     {
@@ -344,15 +315,8 @@ bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_request_t co
   uint8_t const* desc_report = usbh_get_enum_buf();
   uint16_t const desc_len    = request->wLength;
 
-  if (tuh_hid_descriptor_report_cb)
-  {
-    tuh_hid_descriptor_report_cb(dev_addr, instance, desc_report, desc_len);
-  }
-
-  parse_report_descriptor(hid_itf, desc_report, desc_len);
-
   // enumeration is complete
-  if (tuh_hid_mounted_cb) tuh_hid_mounted_cb(dev_addr, instance);
+  tuh_hid_mounted_cb(dev_addr, instance, desc_report, desc_len);
 
   // queue transfer for IN endpoint
   hidh_get_report(dev_addr, hid_itf);
@@ -363,8 +327,11 @@ bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_request_t co
   return true;
 }
 
-// Parse Report Descriptor to tuh_hid_report_info_t
+//--------------------------------------------------------------------+
-static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* desc_report, uint16_t desc_len)
+// Report Descriptor Parser
+//--------------------------------------------------------------------+
+
+uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint8_t arr_count, uint8_t const* desc_report, uint16_t desc_len)
 {
   // Report Item 6.2.2.2 USB HID 1.11
   union TU_ATTR_PACKED
@@ -378,7 +345,20 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
     };
   } header;
 
-  while(desc_len)
+  uint8_t report_num = 0;
+  tuh_hid_report_info_t* info = report_info;
+
+  tu_memclr(report_info, arr_count*sizeof(tuh_hid_report_info_t));
+
+  // current parsed report count & size from descriptor
+//  uint8_t ri_report_count = 0;
+//  uint8_t ri_report_size = 0;
+
+  uint8_t ri_collection_depth = 0;
+  uint16_t ri_usage_page = 0;
+  uint8_t ri_usage = 0;
+
+  while(desc_len && report_num < arr_count)
   {
     header.byte = *desc_report++;
     desc_len--;
@@ -387,6 +367,8 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
     uint8_t const type = header.type;
     uint8_t const size = header.size;
 
+    uint8_t const data8 = desc_report[0];
+
     TU_LOG2("tag = %d, type = %d, size = %d, data = ", tag, type, size);
     for(uint32_t i=0; i<size; i++) TU_LOG2("%02X ", desc_report[i]);
     TU_LOG2("\r\n");
@@ -399,8 +381,14 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
           case RI_MAIN_INPUT: break;
           case RI_MAIN_OUTPUT: break;
           case RI_MAIN_FEATURE: break;
-          case RI_MAIN_COLLECTION: break;
+
-          case RI_MAIN_COLLECTION_END: break;
+          case RI_MAIN_COLLECTION:
+            ri_collection_depth++;
+          break;
+
+          case RI_MAIN_COLLECTION_END:
+            ri_collection_depth--;
+          break;
 
           default: break;
         }
@@ -409,16 +397,49 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
       case RI_TYPE_GLOBAL:
         switch(tag)
         {
-          case RI_GLOBAL_USAGE_PAGE    : break;
+          case RI_GLOBAL_USAGE_PAGE:
+            // only take in account the "usage page" before starting COLLECTION
+            if ( ri_collection_depth == 0)
+            {
+              memcpy(&ri_usage_page, desc_report, size);
+            }
+          break;
+
           case RI_GLOBAL_LOGICAL_MIN   : break;
           case RI_GLOBAL_LOGICAL_MAX   : break;
           case RI_GLOBAL_PHYSICAL_MIN  : break;
           case RI_GLOBAL_PHYSICAL_MAX  : break;
+
+          case RI_GLOBAL_REPORT_ID:
+            report_num++;
+            if (data8 <= arr_count)
+            {
+              uint8_t const idx = data8 - 1;
+              if ( info != &report_info[idx] )
+              {
+                // copy info so far to its correct report ID, and update info pointer
+                report_info[idx] = *info;
+                info = &report_info[idx];
+              }
+
+              info->usage_page = ri_usage_page;
+              info->usage = ri_usage;
+            }else
+            {
+              TU_LOG2("HID Skip a report with ID (%u) larger than array count (%u)\r\n", data8, arr_count);
+            }
+          break;
+
+          case RI_GLOBAL_REPORT_SIZE:
+//            ri_report_size = data8;
+          break;
+
+          case RI_GLOBAL_REPORT_COUNT:
+//            ri_report_count = data8;
+          break;
+
           case RI_GLOBAL_UNIT_EXPONENT : break;
           case RI_GLOBAL_UNIT          : break;
-          case RI_GLOBAL_REPORT_SIZE   : break;
-          case RI_GLOBAL_REPORT_ID     : break;
-          case RI_GLOBAL_REPORT_COUNT  : break;
           case RI_GLOBAL_PUSH          : break;
           case RI_GLOBAL_POP           : break;
 
@@ -429,7 +450,11 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
       case RI_TYPE_LOCAL:
         switch(tag)
         {
-          case RI_LOCAL_USAGE            : break;
+          case RI_LOCAL_USAGE:
+            // only take in account the "usage" before starting COLLECTION
+            if ( ri_collection_depth == 0) ri_usage = data8;
+          break;
+
           case RI_LOCAL_USAGE_MIN        : break;
           case RI_LOCAL_USAGE_MAX        : break;
           case RI_LOCAL_DESIGNATOR_INDEX : break;
@@ -450,6 +475,20 @@ static void parse_report_descriptor(hidh_interface_t* hid_itf, uint8_t const* de
     desc_report += size;
     desc_len    -= size;
   }
+
+  if ( report_num == 0 )
+  {
+    report_info[0].usage_page = ri_usage_page;
+    report_info[0].usage = ri_usage;
+  }
+
+  for ( uint8_t i = 0; (i < report_num) || (!i && !report_num); i++ )
+  {
+    info = report_info+i;
+    TU_LOG2("%u: usage_page = %u, usage = %u\r\n", i, info->usage_page, info->usage);
+  }
+
+  return report_num;
 }
 
 //--------------------------------------------------------------------+

src/class/hid/hid_host.h

@@ -53,17 +53,12 @@
 
 typedef struct
 {
-  uint8_t count;        // number of info
+  uint16_t usage_page;
-
-  struct
-  {
-    uint8_t usage_page;
   uint8_t usage;
 
   // TODO still use the endpoint size for now
-    uint8_t in_len;      // length of IN report
+//  uint8_t in_len;      // length of IN report
-    uint8_t out_len;     // length of OUT report
+//  uint8_t out_len;     // length of OUT report
-  } info[CFG_TUH_HID_REPORT_MAX];
 } tuh_hid_report_info_t;
 
 //--------------------------------------------------------------------+
@@ -79,47 +74,44 @@ uint8_t tuh_n_hid_instance_count(uint8_t dev_addr);
 // Check if HID instance is mounted
 bool tuh_n_hid_n_mounted(uint8_t dev_addr, uint8_t instance);
 
-// Get boot protocol check out hid_protocol_type_t for possible value
+// Get boot interface protocol check out hid_protocol_type_t for possible value
-uint8_t tuh_n_hid_n_boot_protocol(uint8_t dev_addr, uint8_t instance);
+uint8_t tuh_n_hid_n_interface_protocol(uint8_t dev_addr, uint8_t instance);
 
-// Check if current mode is Boot (true) or Report (false)
+// Get current protocol mode: Boot (true) or Report (false)
-bool tuh_n_hid_n_boot_mode(uint8_t dev_addr, uint8_t instance);
+// By HID spec, device will be initialized in Report mode
+bool tuh_n_hid_n_get_protocol(uint8_t dev_addr, uint8_t instance);
 
-// Get Report information parsed from report descriptor. Data must not be modified by application
+// Set protocol to Boot or Report mode.
-// If report information does not match the actual device descriptor, that is because the built-in parser
+// This function is only supported by Boot interface tuh_n_hid_n_boot_interface()
-// has its limit. Application could use tuh_hid_descriptor_report_cb() callback to parse descriptor by itself.
+bool tuh_n_hid_n_set_protocol(uint8_t dev_addr, uint8_t instance, bool boot_mode);
-tuh_hid_report_info_t const* tuh_n_hid_n_get_report_info(uint8_t dev_addr, uint8_t instance);
+
+// Parse report descriptor into array of report_info struct and return number of reports.
+// If return 0, this is a ingle report, otherwise it is composite report with 1st byte as ID.
+// For complicated report, application should write its own parser.
+uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint8_t arr_count, uint8_t const* desc_report, uint16_t desc_len) TU_ATTR_UNUSED;
 
 // Check if the interface is ready to use
-bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance);
+//bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance);
 
 // Set Report using control endpoint
 //bool tuh_n_hid_n_set_report_control(uint8_t dev_addr, uint8_t instance, void* report, uint16_t len);
 
 //-------------  -------------//
 
-// Check if HID instance with Keyboard is mounted
-bool tuh_n_hid_n_keyboard_mounted(uint8_t dev_addr, uint8_t instance);
-
-// Check if HID instance with Mouse is mounted
-bool tuh_n_hid_n_mouse_mounted(uint8_t dev_addr, uint8_t instance);
-
 //--------------------------------------------------------------------+
 // Callbacks (Weak is optional)
 //--------------------------------------------------------------------+
 
-// Invoked when report descriptor is received
-// Note: enumeration is still not complete yet at this time
-TU_ATTR_WEAK void tuh_hid_descriptor_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report_desc, uint16_t desc_len);
-
 // Invoked when device with hid interface is mounted
-TU_ATTR_WEAK void tuh_hid_mounted_cb  (uint8_t dev_addr, uint8_t instance);
+// Report descriptor is also available for use. tuh_hid_parse_report_descriptor()
+// can be used to parse common/simple enough descriptor.
+void tuh_hid_mounted_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report_desc, uint16_t desc_len);
 
 // Invoked when device with hid interface is un-mounted
 TU_ATTR_WEAK void tuh_hid_unmounted_cb(uint8_t dev_addr, uint8_t instance);
 
 // Invoked when received Report from device via either regular or control endpoint
-TU_ATTR_WEAK void tuh_hid_get_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len);
+void tuh_hid_get_report_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len);
 
 // Invoked when Sent Report to device via either regular or control endpoint
 TU_ATTR_WEAK void tuh_hid_set_report_complete_cb(uint8_t dev_addr, uint8_t instance, uint8_t xferred_bytes);