add Pico 2 W firmware

CMakeLists.txt

@@ -1,7 +1,10 @@
 cmake_minimum_required(VERSION 3.13)
 set(PROJECT webkeyboard)
 set(PICO_SDK_PATH /home/kenji/programming/pico/c/pico-sdk)
-set(PICO_BOARD pico_w)
+if (NOT DEFINED PICO_BOARD)
+	set(PICO_BOARD pico_w)
+endif()
+#set(PICO_BOARD pico2_w)
 include (${PICO_SDK_PATH}/external/pico_sdk_import.cmake)
 project(${PROJECT} C CXX ASM)
 
@@ -37,7 +40,8 @@ target_sources(${PROJECT} PRIVATE
 )
 
 pico_enable_stdio_usb(${PROJECT} 1)
-pico_enable_stdio_uart(${PROJECT} 1)
+
+set_target_properties(${PROJECT} PROPERTIES OUTPUT_NAME "${PROJECT}-${PICO_BOARD}")
 
 pico_add_extra_outputs(${PROJECT})
 
@@ -49,6 +53,7 @@ target_link_libraries(${PROJECT}
 	pico_stdlib
 	pico_multicore
 	pico_mbedtls
+	tinyusb_board
 	tinyusb_device
 )
 

README.md

@@ -2,28 +2,31 @@
 
 ## About
 
-This project turns a Raspberry Pi Pico W into a web-based USB HID keyboard 
-device. Users can access a webpage served over HTTP to enter keyboard input
-onto the host device of the Raspberry Pi Pico W. Input keys can be entered
-through a keyboard on the client device or by pressing on the keys on the
-graphical interface served on the webpage.
+This project turns a Raspberry Pi Pico W or Raspberry Pi Pico 2 W into a
+web-based USB HID keyboard  device. Users can access a webpage served over HTTP
+to enter keyboard input onto the host device of the Raspberry Pi Pico (2) W.
+Input keys can be entered through a keyboard on the client device or by
+pressing on the keys on the graphical interface served on the webpage.
 
 ![Web interface for Web Keyboard](web-ui.jpg)
 
 ## Setup
 
-Download the webkeyboard.uf2 file from the latest
-[release](https://git.kkozai.com/kenji/webkeyboard/releases) and flash
-onto the Raspberry Pi Pico W by holding down the BOOTSEL button while plugging
-into your computer so that it appears as a USB drive, then transfer the
-firmware file onto the Pico W. After unmounting, connect the Raspberry Pi Pico
-W with a micro USB cable to the host computer or other device.
+[Installation and demo video](https://youtu.be/uORnxt5DLTw)
 
-On initial boot, the Raspberry Pi Pico W will enter Access Point mode with
+Download the appropriate firmware file for your board, either
+webkeyboard-pico_w.uf2 or webkeyboard-pico2_w.uf2, from the latest
+[release](https://git.kkozai.com/kenji/webkeyboard/releases) and flash
+onto the Raspberry Pi Pico (2) W by holding down the BOOTSEL button while
+plugging into your computer so that it appears as a USB drive, then transfer the
+firmware file onto the Pico (2) W. After unmounting, connect the Raspberry Pi
+Pico (2) W with a micro USB cable to the host computer or other device.
+
+On initial boot, the Raspberry Pi Pico (2) W will enter Access Point mode with
 SSID "picokb" and password "password". Connect to this network with another
 device and open a browser window to http://192.168.0.1.
 Go to the "Configure W-Fi" page and enter the SSID and password to the
-network that you would like the Raspberry Pi Pico W to connect. Optionally,
+network that you would like the Raspberry Pi Pico (2) W to connect. Optionally,
 also enter a hostname for the device and static IP information. Hit the "Save"
 button to save the network information to device flash.
 

html/index.html

@@ -250,8 +250,6 @@ window.onload = (event) => {
 	window.addEventListener("keyup", onKeyUp, true);
 
 	socket = new WebSocket("ws://" + window.location.hostname + ":8080/");
-	//socket.onopen = function (event) { document.getElementById("websocket").innerHTML="connected"; };
-	//socket.onclose = function (event) { document.getElementById("websocket").innerHTML="closed"; };
 	socket.onmessage = function (event) { updateLEDs(event.data); };
 }
 
@@ -332,6 +330,11 @@ function sendKeys(curKeys, is_mouse) {
 		} else {
 			socket.send("K: " + curKeys);
 		}
+	} else if (socket.readyState == WebSocket.CLOSED) {
+		socket = new WebSocket("ws://" + window.location.hostname + ":8080/");
+		setTimeout( function () { sendKeys(curKeys, is_mouse); }, 10);
+	} else {
+		setTimeout( function () { sendKeys(curKeys, is_mouse); }, 10);
 	}
 }
 

html/indicators.shtml

@@ -1,15 +0,0 @@
-<!DOCTYPE html>
-
-<html>
-
-<head>
-<title>Keyboard Indicators</title>
-</head>
-
-<body>
-<div id="num" class="<!--#num-->">NumLock</div>
-<div id="caps" class="<!--#caps-->">CapsLock</div>
-<div id="scroll" class="<!--#scroll-->">ScrollLock</div>
-</body>
-
-</html>

mbedtls_config.h

@@ -1,5 +1,5 @@
-#ifndef MBEDTLS_CONFIG_EXAMPLES_COMMON_H
-#define MBEDTLS_CONFIG_EXAMPLES_COMMON_H
+#ifndef MBEDTLS_CONFIG_H
+#define MBEDTLS_CONFIG_H
 
 /* Workaround for some mbedtls source files using INT_MAX without including limits.h */
 #include <limits.h>
@@ -11,6 +11,7 @@
 
 #define MBEDTLS_ALLOW_PRIVATE_ACCESS
 #define MBEDTLS_HAVE_TIME
+#define MBEDTLS_PLATFORM_MS_TIME_ALT
 
 #define MBEDTLS_CIPHER_MODE_CBC
 #define MBEDTLS_ECP_DP_SECP192R1_ENABLED

my_fsdata.c

@@ -13,46 +13,6 @@ static const unsigned char data_fsdata_c[] = {
 	0x2f, 0x70, 0x6c, 0x61, 0x69, 0x6e, 0xd, 0xa, 0xd, 0xa, 
 };
 
-static const unsigned char data_indicators_shtml[] = {
-	/* /indicators.shtml */
-	0x2f, 0x69, 0x6e, 0x64, 0x69, 0x63, 0x61, 0x74, 0x6f, 0x72, 0x73, 0x2e, 0x73, 0x68, 0x74, 0x6d, 0x6c, 0,
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-	0x74, 0x6d, 0x6c, 0x3e, 0xa, };
-
 static const unsigned char data_wifi_shtml[] = {
 	/* /wifi.shtml */
 	0x2f, 0x77, 0x69, 0x66, 0x69, 0x2e, 0x73, 0x68, 0x74, 0x6d, 0x6c, 0,
@@ -1015,27 +975,7 @@ static const unsigned char data_index_html[] = {
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@@ -1221,325 +1161,351 @@ static const unsigned char data_index_html[] = {
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-	0x65, 0x66, 0x3d, 0x22, 0x72, 0x65, 0x62, 0x6f, 0x6f, 0x74, 
-	0x2e, 0x63, 0x67, 0x69, 0x22, 0x3e, 0x52, 0x65, 0x62, 0x6f, 
-	0x6f, 0x74, 0x3c, 0x2f, 0x61, 0x3e, 0xa, 0x9, 0x3c, 0x2f, 
-	0x64, 0x69, 0x76, 0x3e, 0xa, 0x3c, 0x2f, 0x64, 0x69, 0x76, 
-	0x3e, 0xa, 0xa, 0x3c, 0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e, 
-	0xa, 0xa, 0x3c, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0xa, 
-};
+	0x6f, 0x6e, 0x22, 0x3b, 0xa, 0x9, 0x9, 0x7d, 0x20, 0x65, 
+	0x6c, 0x73, 0x65, 0x20, 0x7b, 0xa, 0x9, 0x9, 0x9, 0x69, 
+	0x6e, 0x64, 0x69, 0x63, 0x61, 0x74, 0x6f, 0x72, 0x5f, 0x64, 
+	0x69, 0x76, 0x2e, 0x63, 0x6c, 0x61, 0x73, 0x73, 0x4e, 0x61, 
+	0x6d, 0x65, 0x20, 0x3d, 0x20, 0x22, 0x6f, 0x66, 0x66, 0x22, 
+	0x3b, 0xa, 0x9, 0x9, 0x7d, 0xa, 0x9, 0x7d, 0xa, 0x7d, 
+	0xa, 0xa, 0x3c, 0x2f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 
+	0x3e, 0xa, 0xa, 0x3c, 0x2f, 0x68, 0x65, 0x61, 0x64, 0x3e, 
+	0xa, 0xa, 0x3c, 0x62, 0x6f, 0x64, 0x79, 0x3e, 0xa, 0x3c, 
+	0x64, 0x69, 0x76, 0x20, 0x63, 0x6c, 0x61, 0x73, 0x73, 0x3d, 
+	0x22, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 
+	0x22, 0x3e, 0xa, 0x9, 0x3c, 0x64, 0x69, 0x76, 0x20, 0x69, 
+	0x64, 0x3d, 0x22, 0x6b, 0x65, 0x79, 0x62, 0x6f, 0x61, 0x72, 
+	0x64, 0x22, 0x3e, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 
+	0x9, 0x3c, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x9, 0x9, 0x3c, 
+	0x64, 0x69, 0x76, 0x20, 0x69, 0x64, 0x3d, 0x22, 0x69, 0x6e, 
+	0x64, 0x69, 0x63, 0x61, 0x74, 0x6f, 0x72, 0x73, 0x22, 0x3e, 
+	0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x9, 0x9, 0x3c, 
+	0x64, 0x69, 0x76, 0x3e, 0x4d, 0x6f, 0x75, 0x73, 0x65, 0x20, 
+	0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x73, 0x3a, 0x3c, 
+	0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x9, 0x9, 0x3c, 0x64, 
+	0x69, 0x76, 0x20, 0x69, 0x64, 0x3d, 0x22, 0x6d, 0x6f, 0x75, 
+	0x73, 0x65, 0x22, 0x3e, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 
+	0xa, 0x9, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x3c, 
+	0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0xa, 0x3c, 0x64, 0x69, 
+	0x76, 0x20, 0x69, 0x64, 0x3d, 0x22, 0x6d, 0x61, 0x63, 0x72, 
+	0x6f, 0x73, 0x22, 0x3e, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 
+	0xa, 0xa, 0x3c, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x9, 0x3c, 
+	0x64, 0x69, 0x76, 0x20, 0x63, 0x6c, 0x61, 0x73, 0x73, 0x3d, 
+	0x22, 0x6d, 0x65, 0x6e, 0x75, 0x22, 0x3e, 0xa, 0x9, 0x9, 
+	0x3c, 0x61, 0x20, 0x68, 0x72, 0x65, 0x66, 0x3d, 0x22, 0x77, 
+	0x69, 0x66, 0x69, 0x2e, 0x73, 0x68, 0x74, 0x6d, 0x6c, 0x22, 
+	0x3e, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x65, 
+	0x20, 0x57, 0x69, 0x2d, 0x46, 0x69, 0x3c, 0x2f, 0x61, 0x3e, 
+	0xa, 0x9, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0x9, 
+	0x3c, 0x64, 0x69, 0x76, 0x20, 0x63, 0x6c, 0x61, 0x73, 0x73, 
+	0x3d, 0x22, 0x6d, 0x65, 0x6e, 0x75, 0x22, 0x3e, 0xa, 0x9, 
+	0x9, 0x3c, 0x61, 0x20, 0x68, 0x72, 0x65, 0x66, 0x3d, 0x22, 
+	0x72, 0x65, 0x62, 0x6f, 0x6f, 0x74, 0x2e, 0x63, 0x67, 0x69, 
+	0x22, 0x3e, 0x52, 0x65, 0x62, 0x6f, 0x6f, 0x74, 0x3c, 0x2f, 
+	0x61, 0x3e, 0xa, 0x9, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 
+	0xa, 0x3c, 0x2f, 0x64, 0x69, 0x76, 0x3e, 0xa, 0xa, 0x3c, 
+	0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e, 0xa, 0xa, 0x3c, 0x2f, 
+	0x68, 0x74, 0x6d, 0x6c, 0x3e, 0xa, };
 
 static const unsigned char data_success_html[] = {
 	/* /success.html */
@@ -1602,9 +1568,7 @@ static const unsigned char data_success_html[] = {
 
 const struct fsdata_file file_fsdata_c[] = {{NULL, data_fsdata_c, data_fsdata_c + 10, sizeof(data_fsdata_c) - 10, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
 
-const struct fsdata_file file_indicators_shtml[] = {{file_fsdata_c, data_indicators_shtml, data_indicators_shtml + 18, sizeof(data_indicators_shtml) - 18, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
-
-const struct fsdata_file file_wifi_shtml[] = {{file_indicators_shtml, data_wifi_shtml, data_wifi_shtml + 12, sizeof(data_wifi_shtml) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
+const struct fsdata_file file_wifi_shtml[] = {{file_fsdata_c, data_wifi_shtml, data_wifi_shtml + 12, sizeof(data_wifi_shtml) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
 
 const struct fsdata_file file_index_html[] = {{file_wifi_shtml, data_index_html, data_index_html + 12, sizeof(data_index_html) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
 
@@ -1612,4 +1576,4 @@ const struct fsdata_file file_success_html[] = {{file_index_html, data_success_h
 
 #define FS_ROOT file_success_html
 
-#define FS_NUMFILES 5
+#define FS_NUMFILES 4

parse_keys.c

@@ -7,6 +7,8 @@
 #include "parse_keys.h"
 #include "usb_descriptors.h"
 
+static unsigned char boot_buf[8];
+
 // take a list of Javascript keys representing pressed keys and turn into
 // a 8 byte USB boot keyboard report format
 void parse_key_list(char * keys) {
@@ -50,8 +52,8 @@ void parse_key_list(char * keys) {
 }
 
 void parse_mouse_list (char * keys) {
-	static unsigned char mouse_report[3];
-	memset(mouse_report, 0x00, 3);
+	static unsigned char mouse_report[5];
+	memset(mouse_report, 0x00, 5);
 
 	// Javascript sends the list as comma delimited, so split into individual
 	// keys by splitting at commas
@@ -75,11 +77,11 @@ void parse_mouse_list (char * keys) {
 
 	// print resulting HID boot mouse report to CDC for debugging
 	printf("Mouse report: ");
-	for(int i=0; i<3; i++){
+	for(int i=0; i<5; i++){
 		printf("%02X ",mouse_report[i]);
 	}
 	printf("\n");
-	tud_hid_report(REPORT_ID_MOUSE, mouse_report, 3);
+	tud_hid_report(REPORT_ID_MOUSE, mouse_report, 5);
 }
 
 // take a single Javascript key code and convert it to USB HID scancode

parse_keys.h

@@ -3,7 +3,6 @@
 
 #define MOUSE_SPEED 10
 
-static unsigned char boot_buf[8];
 
 void parse_key_list(char * keys);
 void parse_mouse_list(char * keys);
@@ -12,7 +11,6 @@ uint8_t parse_mod(char * key);
 
 typedef struct { char * key; uint8_t val; } keycode_dict;
 
-
 // modifier key bit codes
 #define KEY_MOD_LCTRL  0x01
 #define KEY_MOD_LSHIFT 0x02

server.c

@@ -66,7 +66,6 @@ const char * ip_parts[] = {
 #define NPARTS ( sizeof( ip_parts )/ sizeof(ip_parts[0]) )
 
 static const tCGI cgi_handlers[] = {
-	{ "/sendkeys.cgi", sendkeys_cgi },
 	{ "/reboot.cgi", reboot_cgi },
 };
 
@@ -133,7 +132,7 @@ void run_http_server() {
 
 	// start the HTTP web server for keyboard input and config page
 	httpd_init();
-	http_set_cgi_handlers(cgi_handlers, 2);
+	http_set_cgi_handlers(cgi_handlers, 1);
 	for (size_t i = 0; i < LWIP_ARRAYSIZE(ssi_tags); i++) {
 	LWIP_ASSERT("tag too long for LWIP_HTTPD_MAX_TAG_NAME_LEN",
 		strlen(ssi_tags[i]) <= LWIP_HTTPD_MAX_TAG_NAME_LEN);
@@ -189,21 +188,6 @@ void run_http_server() {
 	}
 }
 
-// lwIP cgi handler for GET requests to sendkeys.cgi
-const char * sendkeys_cgi (int iIndex, int iNumParams, char *pcParam[], char *pcValue[]) {
-	for (int i=0; i < iNumParams; i++) {
-		// search GET parameters for keys and forward for processing to USB
-		if (strcmp(pcParam[i], "keys") == 0 ) {
-			parse_key_list(pcValue[i]);
-		}
-	}
-
-	lastActive= get_absolute_time();
-
-	// send return page
-	return "/success.html";
-}
-
 // lwIP cgi handler for reboots initiated from the web
 const char * reboot_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]) {
 	// turn on reboot flag to prevent watchdog from updating
@@ -469,6 +453,8 @@ const void ws_receive_handler(uint8_t *data, uint16_t len) {
 	} else if (strncmp(data, "M: ", 3) == 0) {
 		parse_mouse_list(&data[3]);
 	}
+	
+	lastActive= get_absolute_time();
 }
 
 // save keyboard's LED indicator status to memory

server.h

@@ -23,7 +23,6 @@ typedef struct  {
 } net_config;
 
 void run_http_server();
-const char * sendkeys_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
 const char * reboot_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
 uint16_t __time_critical_func(ssi_handler)(int iIndex, char *pcInsert, int iInsertLen);
 void set_indicator(uint8_t const* buffer);

usb_descriptors.c

@@ -25,20 +25,10 @@
  */
 
 #include "tusb.h"
+#include "bsp/board_api.h"
+
 #include "usb_descriptors.h"
 
-/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
- * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
- *
- * Auto ProductID layout's Bitmap:
- *   [MSB]         HID | MSC | CDC          [LSB]
- */
-#define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
-#define USB_PID           (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
-                           _PID_MAP(MIDI, 3) | _PID_MAP(VENDOR, 4) )
-
-#define USB_VID   0xCafe
-#define USB_BCD   0x0200
 
 //--------------------------------------------------------------------+
 // Device Descriptors
@@ -80,13 +70,6 @@ uint8_t const * tud_descriptor_device_cb(void)
 // Configuration Descriptor
 //--------------------------------------------------------------------+
 
-#define EPNUM_CDC_NOTIF	0x81
-#define EPNUM_CDC_OUT	0x02
-#define EPNUM_CDC_IN	0x82
-#define EPNUM_HID		0x83
-
-#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN + TUD_HID_DESC_LEN)
-
 uint8_t const desc_hid_report[] =
 {
 	TUD_HID_REPORT_DESC_KEYBOARD( HID_REPORT_ID(REPORT_ID_KEYBOARD)),
@@ -103,7 +86,7 @@ uint8_t const desc_fs_configuration[] =
 
 	// Interface number, string index, protocol, report descriptor len, EP In address, size & polling interval
 	TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
-	TUD_HID_DESCRIPTOR(ITF_NUM_HID, 5, HID_ITF_PROTOCOL_NONE, sizeof(desc_hid_report), EPNUM_HID, CFG_TUD_HID_EP_BUFSIZE, 5),
+	TUD_HID_DESCRIPTOR(ITF_NUM_HID, 5, HID_ITF_PROTOCOL_NONE, sizeof(desc_hid_report), EPNUM_HID, CFG_TUD_HID_EP_BUFSIZE, 8),
 };
 
 // Invoked when received GET CONFIGURATION DESCRIPTOR
@@ -126,12 +109,12 @@ char const* string_desc_arr [] =
 	(const char[]) { 0x09, 0x04 },	// 0: is supported language is English (0x0409)
 	"Raspberry Pi",					// 1: Manufacturer
 	"Pico Web Keyboard",			// 2: Product
-  "1234567890123456789",         // 3: Serials, should use chip ID
-  "Pico Web Keyboard CDC",       // 4: CDC Interface
-  "Pico Web Keyboard HID",       // 5: HID Keyboard Interface
+	NULL,					        // 3: Serials, should use chip ID
+	"Pico Web Keyboard CDC",		// 4: CDC
+	"Pico Web Keyboard HID",		// 5: HID
 };
 
-static uint16_t _desc_str[32];
+static uint16_t _desc_str[32+1];
 
 // Invoked when received GET STRING DESCRIPTOR request
 // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
@@ -141,28 +124,31 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
 
 	uint8_t chr_count;
 
-  if ( index == 0)
-  {
+	switch (index) {
+		case 0: // langid
 			memcpy(&_desc_str[1], string_desc_arr[0], 2);
 			chr_count = 1;
-  }else
-  {
+			break;
+		case 3: // serial
+			chr_count = board_usb_get_serial(_desc_str+1, 32);	
+			break;
+		default:
 			// Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
 			// https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
 
 			if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
 
-    const char* str = string_desc_arr[index];
+			char* str = string_desc_arr[index];
 
 			// Cap at max char
 			chr_count = (uint8_t) strlen(str);
 			if ( chr_count > 31 ) chr_count = 31;
 
 			// Convert ASCII string into UTF-16
-    for(uint8_t i=0; i<chr_count; i++)
-    {
+			for(uint8_t i=0; i<chr_count; i++) {
 				_desc_str[1+i] = str[i];
 			}
+			break;
 	}
 
 	// first byte is length (including header), second byte is string type
@@ -171,7 +157,6 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
 	return _desc_str;
 }
 
-
 //--------------------------------------------------------------------+
 // Device HID
 //--------------------------------------------------------------------+

usb_descriptors.h

@@ -41,5 +41,15 @@ enum
 	ITF_NUM_TOTAL
 };
 
+#define USB_PID		0x0EBD
+#define USB_VID		0xCEC0
+#define USB_BCD		0x0200
+
+#define EPNUM_CDC_NOTIF	0x81
+#define EPNUM_CDC_OUT	0x02
+#define EPNUM_CDC_IN	0x82
+#define EPNUM_HID		0x83
+
+#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN + TUD_HID_DESC_LEN)
 
 #endif /* USB_DESCRIPTORS_H_ */

websocket.c

@@ -13,12 +13,30 @@ static const char WS_RESPONSE[] = "HTTP/1.1 101 Switching Protocols\r\n" \
 	"Connection: Upgrade\r\n" \
 	"Sec-WebSocket-Accept: ";
 
+static uint8_t buf[WS_BUFFER_SIZE];
+static uint16_t buf_len=0;
+
 static tWSHandler ws_receive_cb = NULL;
 static tWSOpenHandler ws_open_cb = NULL;
 
 static struct ws_state * ws_connections;
 static uint8_t ws_num_conns = 0;
 
+static struct ws_state* ws_state_alloc(void);
+static void ws_state_init(struct ws_state *wss);
+static void ws_state_free(struct ws_state *wss);
+static void ws_server_init_pcb( struct altcp_pcb *pcb, uint16_t port);
+static err_t ws_accept(void *arg, struct altcp_pcb *pcb, err_t err);
+static err_t ws_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err);
+static err_t ws_sent(void *arg, struct altcp_pcb *pcb, uint16_t len);
+static void ws_err (void *arg, err_t err);
+static err_t ws_close_conn(struct altcp_pcb *pcb, struct ws_state *wss);
+static err_t ws_close_or_abort_conn(struct altcp_pcb *pcb, struct ws_state *wss, uint8_t abort_conn);
+static err_t ws_poll(void *arg, struct altcp_pcb *pcb);
+static err_t ws_handshake(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p);
+static err_t ws_read(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p);
+static err_t ws_send(struct ws_state *wss, uint8_t *data, uint16_t len);
+
 // allocate memory for ws_state instance
 static struct ws_state * ws_state_alloc(void) {
 	struct ws_state *ret =  WS_ALLOC_WS_STATE();
@@ -120,6 +138,7 @@ static err_t ws_accept(void *arg, struct altcp_pcb *pcb, err_t err) {
 	
 	// register callbacks for tcp events
 	altcp_recv(pcb, ws_recv);
+	altcp_sent(pcb, ws_sent);
 	altcp_poll(pcb, ws_poll, WS_POLL_INTERVAL);
 	altcp_err(pcb, ws_err);
 
@@ -166,6 +185,24 @@ static err_t ws_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err
 	return ERR_OK;
 }
 
+// called when data has been sent over the websocket
+static err_t ws_sent(void *arg, struct altcp_pcb *pcb, uint16_t len) {
+	struct ws_state *wss = (struct ws_state *)arg;
+
+	LWIP_DEBUGF(WS_DEBUG | LWIP_DBG_TRACE, ("ws_sent %p\n", (void*) pcb));
+
+	LWIP_UNUSED_ARG(len);
+
+	if (wss == NULL) {
+		return ERR_OK;
+	}
+
+	wss->retries = 0;
+
+	return ERR_OK;
+}
+
+// called when there is a websocket error
 static void ws_err (void *arg, err_t err) {
 	struct ws_state *wss = (struct ws_state *) arg;
 	LWIP_UNUSED_ARG(err);
@@ -192,6 +229,7 @@ static err_t ws_close_or_abort_conn(struct altcp_pcb *pcb, struct ws_state *wss,
 	// clear callbacks
 	altcp_arg(pcb, NULL);
 	altcp_recv(pcb, NULL);
+	altcp_sent(pcb, NULL);
 	altcp_poll(pcb, NULL, 0);
 	altcp_err(pcb, NULL);
 
@@ -310,30 +348,94 @@ static err_t ws_read(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p
 		// successful read, reset timeout
 		wss->retries = 0;
 
-		uint8_t mode = data[0] & 0x0F;
+		uint8_t fin = data[0] & 0x80;
+		uint8_t opcode = data[0] & 0x0F;
+		uint8_t masked = data[1] & 0x80;
 		uint16_t msg_len = data[1] & 0x7F;
-		switch (mode) {
-			case 0x01: //text
+		uint8_t *msg;
+		
+		switch (msg_len) {
+			case 126: // next two bytes are length
+				memcpy(&msg_len, &data[2], 2);
+				if (len >= 8) {
+					msg = &data[8];
+				}
+				break;
+			case 127: // next four bytes are length
+				// lwIP's pbuf only handles 16-bit lengths, so error
+				LWIP_DEBUGF(WS_DEBUG, ("ws_read: received 64-bit length %u\n", msg_len));
+				return ERR_MEM;
+				
+				//memcpy(&msg_len, &data[2], 4);
+				//if (len >= 10) {
+				//	msg = &data[10];
+				//}
+				//break;
+			default:
+				if (len >= 6) {
+					msg = &data[6];
+				}
+				break;
+		}
+		switch (opcode) {
+			case OP_CONT:
+				LWIP_DEBUGF(WS_DEBUG, ("ws_read: received continuation frame\n"));
+			case OP_TEXT:
 				LWIP_DEBUGF(WS_DEBUG, ("ws_read: received text data\n"));
-			case 0x02: //binary
-				LWIP_DEBUGF(WS_DEBUG, ("ws_read: decoding data\n"));
-				if (len >= 6 && ws_receive_cb != NULL) {
+			case OP_BINARY:
+				LWIP_DEBUGF(WS_DEBUG, ("ws_read: decoding data, len=%u\n", msg_len));
+				if (msg && ws_receive_cb != NULL) {
+					// unmask the data if mask bit is received
+					if (masked) {
 						uint8_t *mask = &data[2];
-					uint8_t *msg = &data[6];
 	
 						for (int i=0; i<msg_len; i++) {
 							msg[i] ^= mask[i % 4];
 						}
+					} else {
+						// messages from client must be masked - disconnect
+						LWIP_DEBUGF(WS_DEBUG, ("ws_read: received unmasked message"));
+						return ERR_CLSD;
+					}
 					msg[msg_len]=0;
 
-					ws_receive_cb(msg, msg_len);
+					if (opcode != OP_CONT) { // not a continuation frame, reset buffer
+						buf_len=0;
+						memset(buf, 0x00, sizeof(buf));
+					}
+
+					if (buf_len + msg_len > WS_BUFFER_SIZE) {
+						LWIP_DEBUGF(WS_DEBUG, ("ws_read: message exceeds buffer size %u+%u\n", buf_len, msg_len));
+						return ERR_MEM;
+					}
+
+					memcpy(&buf[buf_len], msg, msg_len);
+					buf_len += msg_len;
+					
+					if (fin) { // last packet in message, process completed message
+						ws_receive_cb(buf, buf_len);
+					}
 				}
 				break;
-			case 0x08: //close
+			case OP_CLOSE:
 				LWIP_DEBUGF(WS_DEBUG, ("ws_read: close request"));
 				return ERR_CLSD;
+			case OP_PING:
+				// control frames cannot exceed 125 bytes in length
+				if (msg && msg_len <= 125) {
+					// send back a pong
+					uint8_t pong[2+msg_len];
+					pong[0]=0x8A;
+					pong[1]=msg_len;
+					memcpy(&pong[2], msg, msg_len);
+
+					return ws_send(wss, pong, msg_len+2);
+				}
+				return ERR_ARG;
+			case OP_PONG: // no response required for pong
+				return ERR_OK;
 			default:
-				LWIP_DEBUGF(WS_DEBUG, ("ws_read: invalid data mode %02X\n", mode));
+				LWIP_DEBUGF(WS_DEBUG, ("ws_read: invalid opcode %02X\n", opcode));
 				return ERR_ARG;
 		}
 
@@ -353,7 +455,6 @@ static err_t ws_send(struct ws_state *wss, uint8_t *data, uint16_t len) {
 	err = altcp_write(wss->pcb, buf, len+2, TCP_WRITE_FLAG_COPY);
 	if (err == ERR_OK) {
 		altcp_output(wss->pcb);
-		wss->retries = 0;
 	}
 
 	return err;

websocket.h

@@ -7,6 +7,14 @@
 #define WS_MAX_RETRIES		10
 #define WS_POLL_INTERVAL	60 // WS_POLL_INTERVAL/2 seconds
 #define WS_MAX_CONN			4
+#define WS_BUFFER_SIZE		512
+
+#define OP_CONT		0x00
+#define OP_TEXT		0x01
+#define OP_BINARY	0x02
+#define OP_CLOSE	0x08
+#define OP_PING		0x09
+#define OP_PONG		0x0A
 
 struct ws_state {
 	bool active;
@@ -20,20 +28,7 @@ struct ws_state {
 typedef void (* tWSHandler ) (uint8_t *data, uint16_t len);
 typedef void (* tWSOpenHandler ) (struct ws_state * wss);
 
-static struct ws_state* ws_state_alloc(void);
-static void ws_state_init(struct ws_state *wss);
-static void ws_state_free(struct ws_state *wss);
 void ws_server_init(void);
-static void ws_server_init_pcb( struct altcp_pcb *pcb, uint16_t port);
-static err_t ws_accept(void *arg, struct altcp_pcb *pcb, err_t err);
-static err_t ws_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err);
-static void ws_err (void *arg, err_t err);
-static err_t ws_close_conn(struct altcp_pcb *pcb, struct ws_state *wss);
-static err_t ws_close_or_abort_conn(struct altcp_pcb *pcb, struct ws_state *wss, uint8_t abort_conn);
-static err_t ws_poll(void *arg, struct altcp_pcb *pcb);
-static err_t ws_handshake(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p);
-static err_t ws_read(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p);
-static err_t ws_send(struct ws_state *wss, uint8_t *data, uint16_t len);
 void ws_send_all(uint8_t *data, uint16_t len);
 void ws_set_receive_handler( tWSHandler ws_handler);
 void ws_set_open_handler( tWSOpenHandler ws_handler);