277 lines
6.8 KiB
C
277 lines
6.8 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "bsp/board.h"
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#include "tusb.h"
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#include "usb_descriptors.h"
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF PROTYPES
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//--------------------------------------------------------------------+
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/* Blink pattern
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* - 250 ms : device not mounted
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* - 1000 ms : device mounted
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* - 2500 ms : device is suspended
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*/
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enum {
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BLINK_NOT_MOUNTED = 250,
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BLINK_MOUNTED = 1000,
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BLINK_SUSPENDED = 2500,
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BLINK_ALWAYS_ON = UINT32_MAX,
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BLINK_ALWAYS_OFF = 0
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};
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static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
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#define URL "www.tinyusb.org/examples/webusb-serial"
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const tusb_desc_webusb_url_t desc_url =
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{
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.bLength = 3 + sizeof(URL) - 1,
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.bDescriptorType = 3, // WEBUSB URL type
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.bScheme = 1, // 0: http, 1: https
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.url = URL
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};
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static bool web_serial_connected = false;
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//------------- prototypes -------------//
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void led_blinking_task(void);
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void cdc_task(void);
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void webserial_task(void);
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/*------------- MAIN -------------*/
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int main(void)
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{
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board_init();
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tusb_init();
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while (1)
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{
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tud_task(); // tinyusb device task
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cdc_task();
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webserial_task();
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led_blinking_task();
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}
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return 0;
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}
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// send characters to both CDC and WebUSB
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void echo_all(uint8_t buf[], uint32_t count)
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{
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// echo to web serial
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if ( web_serial_connected )
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{
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tud_vendor_write(buf, count);
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}
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// echo to cdc
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if ( tud_cdc_connected() )
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{
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for(uint32_t i=0; i<count; i++)
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{
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tud_cdc_write_char(buf[i]);
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if ( buf[i] == '\r' ) tud_cdc_write_char('\n');
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}
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tud_cdc_write_flush();
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}
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}
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//--------------------------------------------------------------------+
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// Device callbacks
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//--------------------------------------------------------------------+
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// Invoked when device is mounted
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void tud_mount_cb(void)
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{
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blink_interval_ms = BLINK_MOUNTED;
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}
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// Invoked when device is unmounted
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void tud_umount_cb(void)
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{
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blink_interval_ms = BLINK_NOT_MOUNTED;
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}
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// Invoked when usb bus is suspended
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// remote_wakeup_en : if host allow us to perform remote wakeup
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// Within 7ms, device must draw an average of current less than 2.5 mA from bus
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void tud_suspend_cb(bool remote_wakeup_en)
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{
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(void) remote_wakeup_en;
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blink_interval_ms = BLINK_SUSPENDED;
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}
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// Invoked when usb bus is resumed
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void tud_resume_cb(void)
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{
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blink_interval_ms = BLINK_MOUNTED;
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}
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//--------------------------------------------------------------------+
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// WebUSB use vendor class
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//--------------------------------------------------------------------+
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// Invoked when received VENDOR control request
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bool tud_vendor_control_request_cb(uint8_t rhport, tusb_control_request_t const * request)
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{
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switch (request->bRequest)
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{
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case VENDOR_REQUEST_WEBUSB:
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// match vendor request in BOS descriptor
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// Get landing page url
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return tud_control_xfer(rhport, request, (void*) &desc_url, desc_url.bLength);
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case VENDOR_REQUEST_MICROSOFT:
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if ( request->wIndex == 7 )
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{
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// Get Microsoft OS 2.0 compatible descriptor
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uint16_t total_len;
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memcpy(&total_len, desc_ms_os_20+8, 2);
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return tud_control_xfer(rhport, request, (void*) desc_ms_os_20, total_len);
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}else
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{
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return false;
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}
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case 0x22:
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// Webserial simulate the CDC_REQUEST_SET_CONTROL_LINE_STATE (0x22) to
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// connect and disconnect.
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web_serial_connected = (request->wValue != 0);
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// Always lit LED if connected
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if ( web_serial_connected )
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{
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board_led_write(true);
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blink_interval_ms = BLINK_ALWAYS_ON;
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tud_vendor_write_str("\r\nTinyUSB WebUSB device example\r\n");
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}else
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{
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blink_interval_ms = BLINK_MOUNTED;
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}
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// response with status OK
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return tud_control_status(rhport, request);
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default:
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// stall unknown request
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return false;
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}
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return true;
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}
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// Invoked when DATA Stage of VENDOR's request is complete
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bool tud_vendor_control_complete_cb(uint8_t rhport, tusb_control_request_t const * request)
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{
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(void) rhport;
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(void) request;
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// nothing to do
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return true;
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}
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void webserial_task(void)
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{
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if ( web_serial_connected )
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{
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if ( tud_vendor_available() )
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{
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uint8_t buf[64];
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uint32_t count = tud_vendor_read(buf, sizeof(buf));
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// echo back to both web serial and cdc
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echo_all(buf, count);
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}
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}
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}
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//--------------------------------------------------------------------+
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// USB CDC
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//--------------------------------------------------------------------+
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void cdc_task(void)
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{
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if ( tud_cdc_connected() )
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{
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// connected and there are data available
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if ( tud_cdc_available() )
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{
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uint8_t buf[64];
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uint32_t count = tud_cdc_read(buf, sizeof(buf));
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// echo back to both web serial and cdc
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echo_all(buf, count);
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}
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}
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}
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// Invoked when cdc when line state changed e.g connected/disconnected
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void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
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{
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(void) itf;
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// connected
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if ( dtr && rts )
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{
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// print initial message when connected
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tud_cdc_write_str("\r\nTinyUSB WebUSB device example\r\n");
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}
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}
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// Invoked when CDC interface received data from host
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void tud_cdc_rx_cb(uint8_t itf)
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{
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(void) itf;
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}
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//--------------------------------------------------------------------+
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// BLINKING TASK
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//--------------------------------------------------------------------+
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void led_blinking_task(void)
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{
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static uint32_t start_ms = 0;
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static bool led_state = false;
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// Blink every interval ms
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if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
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start_ms += blink_interval_ms;
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board_led_write(led_state);
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led_state = 1 - led_state; // toggle
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}
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