diff options
Diffstat (limited to 'tinyusb/examples/device/webusb_serial/src/main.c')
| -rwxr-xr-x | tinyusb/examples/device/webusb_serial/src/main.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/tinyusb/examples/device/webusb_serial/src/main.c b/tinyusb/examples/device/webusb_serial/src/main.c new file mode 100755 index 00000000..aba4aedf --- /dev/null +++ b/tinyusb/examples/device/webusb_serial/src/main.c @@ -0,0 +1,300 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 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. + * + */ + +/* This example demonstrates WebUSB as web serial with browser with WebUSB support (e.g Chrome). + * After enumerated successfully, browser will pop-up notification + * with URL to landing page, click on it to test + * - Click "Connect" and select device, When connected the on-board LED will litted up. + * - Any charters received from either webusb/Serial will be echo back to webusb and Serial + * + * Note: + * - The WebUSB landing page notification is currently disabled in Chrome + * on Windows due to Chromium issue 656702 (https://crbug.com/656702). You have to + * go to landing page (below) to test + * + * - On Windows 7 and prior: You need to use Zadig tool to manually bind the + * WebUSB interface with the WinUSB driver for Chrome to access. From windows 8 and 10, this + * is done automatically by firmware. + * + * - On Linux/macOS, udev permission may need to be updated by + * - copying '/examples/device/99-tinyusb.rules' file to /etc/udev/rules.d/ then + * - run 'sudo udevadm control --reload-rules && sudo udevadm trigger' + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "bsp/board.h" +#include "tusb.h" +#include "usb_descriptors.h" + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF PROTYPES +//--------------------------------------------------------------------+ + +/* Blink pattern + * - 250 ms : device not mounted + * - 1000 ms : device mounted + * - 2500 ms : device is suspended + */ +enum { + BLINK_NOT_MOUNTED = 250, + BLINK_MOUNTED = 1000, + BLINK_SUSPENDED = 2500, + + BLINK_ALWAYS_ON = UINT32_MAX, + BLINK_ALWAYS_OFF = 0 +}; + +static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; + +#define URL "example.tinyusb.org/webusb-serial/" + +const tusb_desc_webusb_url_t desc_url = +{ + .bLength = 3 + sizeof(URL) - 1, + .bDescriptorType = 3, // WEBUSB URL type + .bScheme = 1, // 0: http, 1: https + .url = URL +}; + +static bool web_serial_connected = false; + +//------------- prototypes -------------// +void led_blinking_task(void); +void cdc_task(void); +void webserial_task(void); + +/*------------- MAIN -------------*/ +int main(void) +{ + board_init(); + + tusb_init(); + + while (1) + { + tud_task(); // tinyusb device task + cdc_task(); + webserial_task(); + led_blinking_task(); + } + + return 0; +} + +// send characters to both CDC and WebUSB +void echo_all(uint8_t buf[], uint32_t count) +{ + // echo to web serial + if ( web_serial_connected ) + { + tud_vendor_write(buf, count); + } + + // echo to cdc + if ( tud_cdc_connected() ) + { + for(uint32_t i=0; i<count; i++) + { + tud_cdc_write_char(buf[i]); + + if ( buf[i] == '\r' ) tud_cdc_write_char('\n'); + } + tud_cdc_write_flush(); + } +} + +//--------------------------------------------------------------------+ +// Device callbacks +//--------------------------------------------------------------------+ + +// Invoked when device is mounted +void tud_mount_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + +// Invoked when device is unmounted +void tud_umount_cb(void) +{ + blink_interval_ms = BLINK_NOT_MOUNTED; +} + +// Invoked when usb bus is suspended +// remote_wakeup_en : if host allow us to perform remote wakeup +// Within 7ms, device must draw an average of current less than 2.5 mA from bus +void tud_suspend_cb(bool remote_wakeup_en) +{ + (void) remote_wakeup_en; + blink_interval_ms = BLINK_SUSPENDED; +} + +// Invoked when usb bus is resumed +void tud_resume_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + +//--------------------------------------------------------------------+ +// WebUSB use vendor class +//--------------------------------------------------------------------+ + +// Invoked when a control transfer occurred on an interface of this class +// Driver response accordingly to the request and the transfer stage (setup/data/ack) +// return false to stall control endpoint (e.g unsupported request) +bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request) +{ + // nothing to with DATA & ACK stage + if (stage != CONTROL_STAGE_SETUP) return true; + + switch (request->bmRequestType_bit.type) + { + case TUSB_REQ_TYPE_VENDOR: + switch (request->bRequest) + { + case VENDOR_REQUEST_WEBUSB: + // match vendor request in BOS descriptor + // Get landing page url + return tud_control_xfer(rhport, request, (void*) &desc_url, desc_url.bLength); + + case VENDOR_REQUEST_MICROSOFT: + if ( request->wIndex == 7 ) + { + // Get Microsoft OS 2.0 compatible descriptor + uint16_t total_len; + memcpy(&total_len, desc_ms_os_20+8, 2); + + return tud_control_xfer(rhport, request, (void*) desc_ms_os_20, total_len); + }else + { + return false; + } + + default: break; + } + break; + + case TUSB_REQ_TYPE_CLASS: + if (request->bRequest == 0x22) + { + // Webserial simulate the CDC_REQUEST_SET_CONTROL_LINE_STATE (0x22) to connect and disconnect. + web_serial_connected = (request->wValue != 0); + + // Always lit LED if connected + if ( web_serial_connected ) + { + board_led_write(true); + blink_interval_ms = BLINK_ALWAYS_ON; + + tud_vendor_write_str("\r\nTinyUSB WebUSB device example\r\n"); + }else + { + blink_interval_ms = BLINK_MOUNTED; + } + + // response with status OK + return tud_control_status(rhport, request); + } + break; + + default: break; + } + + // stall unknown request + return false; +} + +void webserial_task(void) +{ + if ( web_serial_connected ) + { + if ( tud_vendor_available() ) + { + uint8_t buf[64]; + uint32_t count = tud_vendor_read(buf, sizeof(buf)); + + // echo back to both web serial and cdc + echo_all(buf, count); + } + } +} + + +//--------------------------------------------------------------------+ +// USB CDC +//--------------------------------------------------------------------+ +void cdc_task(void) +{ + if ( tud_cdc_connected() ) + { + // connected and there are data available + if ( tud_cdc_available() ) + { + uint8_t buf[64]; + + uint32_t count = tud_cdc_read(buf, sizeof(buf)); + + // echo back to both web serial and cdc + echo_all(buf, count); + } + } +} + +// Invoked when cdc when line state changed e.g connected/disconnected +void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) +{ + (void) itf; + + // connected + if ( dtr && rts ) + { + // print initial message when connected + tud_cdc_write_str("\r\nTinyUSB WebUSB device example\r\n"); + } +} + +// Invoked when CDC interface received data from host +void tud_cdc_rx_cb(uint8_t itf) +{ + (void) itf; +} + +//--------------------------------------------------------------------+ +// BLINKING TASK +//--------------------------------------------------------------------+ +void led_blinking_task(void) +{ + static uint32_t start_ms = 0; + static bool led_state = false; + + // Blink every interval ms + if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time + start_ms += blink_interval_ms; + + board_led_write(led_state); + led_state = 1 - led_state; // toggle +} |