rename host/hid_to_cdc to dual/host_hid_to_device_cdc
This commit is contained in:
hathach
294
examples/dual/host_hid_to_device_cdc/src/main.c
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294
examples/dual/host_hid_to_device_cdc/src/main.c
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/*
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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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// This example runs both host and device concurrently. The USB host looks for
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// any HID device with reports that are 8 bytes long and then assumes they are
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// keyboard reports. It translates the keypresses of the reports to ASCII and
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// transmits it over CDC to the device's host.
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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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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF PROTYPES
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//--------------------------------------------------------------------+
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// uncomment if you are using colemak layout
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// #define KEYBOARD_COLEMAK
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#ifdef KEYBOARD_COLEMAK
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const uint8_t colemak[128] = {
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0 , 0, 0, 0, 0, 0, 0, 22,
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9 , 23, 7, 0, 24, 17, 8, 12,
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0 , 14, 28, 51, 0, 19, 21, 10,
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15 , 0, 0, 0, 13, 0, 0, 0,
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0 , 0, 0, 0, 0, 0, 0, 0,
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0 , 0, 0, 0, 0, 0, 0, 0,
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0 , 0, 0, 18, 0, 0, 0, 0,
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0 , 0, 0, 0, 0, 0, 0, 0,
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0 , 0, 0, 0, 0, 0, 0, 0,
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0 , 0, 0, 0, 0, 0, 0, 0
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};
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#endif
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static uint8_t const keycode2ascii[128][2] = { HID_KEYCODE_TO_ASCII };
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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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};
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static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
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void led_blinking_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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printf("TinyUSB Host HID <-> Device CDC Example\r\n");
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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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tuh_task(); // tinyusb host 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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//--------------------------------------------------------------------+
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// Device CDC
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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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// 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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char buf[64];
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uint32_t count = tud_cdc_read(buf, sizeof(buf));
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// TODO control LED on keyboard of host stack
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(void) count;
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}
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//--------------------------------------------------------------------+
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// Host HID
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//--------------------------------------------------------------------+
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// Invoked when device with hid interface is mounted
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// Report descriptor is also available for use. tuh_hid_parse_report_descriptor()
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// can be used to parse common/simple enough descriptor.
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// Note: if report descriptor length > CFG_TUH_ENUMERATION_BUFSIZE, it will be skipped
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// therefore report_desc = NULL, desc_len = 0
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void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
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{
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(void)desc_report;
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(void)desc_len;
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// Interface protocol (hid_interface_protocol_enum_t)
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const char* protocol_str[] = { "None", "Keyboard", "Mouse" };
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uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
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uint16_t vid, pid;
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tuh_vid_pid_get(dev_addr, &vid, &pid);
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printf("[%04x:%04x][%u] HID Interface instance = %d, Protocol = %s\r\n", vid, pid, dev_addr, instance, protocol_str[itf_protocol]);
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// Receive report from boot keyboard & mouse only
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// tuh_hid_report_received_cb() will be invoked when report is available
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if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD || itf_protocol == HID_ITF_PROTOCOL_MOUSE)
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{
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if ( !tuh_hid_receive_report(dev_addr, instance) )
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{
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printf("Error: cannot request report\r\n");
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}
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}
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}
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// Invoked when device with hid interface is un-mounted
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void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
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{
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printf("[%u] HID Interface instance = %d is unmounted\r\n", dev_addr, instance);
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}
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// keycodes from last report to check if key is holding or newly pressed
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uint8_t last_keycodes[6] = {0};
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// look up new key in previous keys
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static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8_t keycode)
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{
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for(uint8_t i=0; i<6; i++)
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{
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if (report->keycode[i] == keycode) return true;
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}
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return false;
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}
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// convert hid keycode to ascii and print via usb device CDC (ignore non-printable)
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static void process_kbd_report(hid_keyboard_report_t const *report)
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{
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static hid_keyboard_report_t prev_report = { 0, 0, {0} }; // previous report to check key released
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bool flush = false;
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for(uint8_t i=0; i<6; i++)
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{
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uint8_t keycode = report->keycode[i];
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if ( keycode )
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{
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if ( find_key_in_report(&prev_report, keycode) )
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{
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// exist in previous report means the current key is holding
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}else
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{
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// not existed in previous report means the current key is pressed
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// remap the key code for Colemak layout
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#ifdef KEYBOARD_COLEMAK
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uint8_t colemak_key_code = colemak[keycode];
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if (colemak_key_code != 0) keycode = colemak_key_code;
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#endif
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bool const is_shift = report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
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uint8_t ch = keycode2ascii[keycode][is_shift ? 1 : 0];
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if (ch)
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{
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if (ch == '\n') tud_cdc_write("\r", 1);
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tud_cdc_write(&ch, 1);
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flush = true;
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}
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}
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}
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// TODO example skips key released
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}
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if (flush) tud_cdc_write_flush();
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prev_report = *report;
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}
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// send mouse report to usb device CDC
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static void process_mouse_report(hid_mouse_report_t const * report)
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{
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char tempbuf[32];
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int count;
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//------------- button state -------------//
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//uint8_t button_changed_mask = report->buttons ^ prev_report.buttons;
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char l = report->buttons & MOUSE_BUTTON_LEFT ? 'L' : '-';
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char m = report->buttons & MOUSE_BUTTON_MIDDLE ? 'M' : '-';
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char r = report->buttons & MOUSE_BUTTON_RIGHT ? 'R' : '-';
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count = sprintf(tempbuf, " %c%c%c %d %d %d\r\n", l, m, r, report->x, report->y, report->wheel);
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tud_cdc_write(tempbuf, count);
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tud_cdc_write_flush();
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}
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// Invoked when received report from device via interrupt endpoint
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void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
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{
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uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
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switch(itf_protocol)
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{
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case HID_ITF_PROTOCOL_KEYBOARD:
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process_kbd_report( (hid_keyboard_report_t const*) report );
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break;
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case HID_ITF_PROTOCOL_MOUSE:
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process_mouse_report( (hid_mouse_report_t const*) report );
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break;
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default: break;
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}
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// continue to request to receive report
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if ( !tuh_hid_receive_report(dev_addr, instance) )
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{
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printf("Error: cannot request report\r\n");
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}
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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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