273 lines
6.5 KiB
C
273 lines
6.5 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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//--------------------------------------------------------------------+
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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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};
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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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void cdc_task(void);
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void hid_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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// tinyusb device task
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tud_task();
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led_blinking_task();
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#if CFG_TUD_CDC
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cdc_task();
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#endif
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#if CFG_TUD_HID
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hid_task();
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#endif
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}
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return 0;
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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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// USB CDC
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//--------------------------------------------------------------------+
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#if CFG_TUD_CDC
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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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// read and echo back
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uint32_t count = tud_cdc_read(buf, sizeof(buf));
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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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// 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 CDC MSC HID 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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#endif
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//--------------------------------------------------------------------+
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// USB HID
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//--------------------------------------------------------------------+
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#if CFG_TUD_HID
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// Must match with ID declared by HID Report Descriptor, better to be in header file
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enum
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{
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REPORT_ID_KEYBOARD = 1,
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REPORT_ID_MOUSE
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};
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void hid_task(void)
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{
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// Poll every 10ms
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const uint32_t interval_ms = 10;
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static uint32_t start_ms = 0;
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if ( board_millis() < start_ms + interval_ms) return; // not enough time
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start_ms += interval_ms;
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uint32_t const btn = board_button_read();
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// Remote wakeup
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if ( tud_suspended() && btn )
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{
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// Wake up host if we are in suspend mode
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// and REMOTE_WAKEUP feature is enabled by host
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tud_remote_wakeup();
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}
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/*------------- Mouse -------------*/
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if ( tud_hid_ready() )
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{
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if ( btn )
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{
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int8_t const delta = 5;
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// no button, right + down, no scroll pan
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tud_hid_mouse_report(REPORT_ID_MOUSE, 0x00, delta, delta, 0, 0);
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// delay a bit before attempt to send keyboard report
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board_delay(2);
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}
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}
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/*------------- Keyboard -------------*/
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if ( tud_hid_ready() )
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{
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// use to avoid send multiple consecutive zero report for keyboard
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static bool has_key = false;
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if ( btn )
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{
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uint8_t keycode[6] = { 0 };
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keycode[0] = HID_KEY_A;
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tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, keycode);
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has_key = true;
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}else
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{
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// send empty key report if previously has key pressed
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if (has_key) tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, NULL);
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has_key = false;
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}
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}
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}
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// Invoked when received GET_REPORT control request
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// Application must fill buffer report's content and return its length.
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// Return zero will cause the stack to STALL request
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uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen)
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{
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// TODO not Implemented
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(void) report_id;
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(void) report_type;
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(void) buffer;
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(void) reqlen;
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return 0;
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}
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// Invoked when received SET_REPORT control request or
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// received data on OUT endpoint ( Report ID = 0, Type = 0 )
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void tud_hid_set_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
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{
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// TODO not Implemented
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(void) report_id;
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(void) report_type;
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(void) buffer;
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(void) bufsize;
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}
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#endif
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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 1000 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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