1 /* Teensyduino Core Library
2 * http://www.pjrc.com/teensy/
3 * Copyright (c) 2013 PJRC.COM, LLC.
4 * Modified by Jacob Alexander (2015)
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * 1. The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
17 * 2. If the Software is incorporated into a build system that allows
18 * selection among a list of target devices, then similar target
19 * devices manufactured by PJRC.COM must be included in the list of
20 * target devices and selectable in the same manner.
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
26 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
27 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
28 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 // ----- Includes -----
35 #include <string.h> // for memcpy()
38 #include <Lib/OutputLib.h>
43 #include "usb_joystick.h"
47 // ----- Defines -----
49 // Maximum number of transmit packets to queue so we don't starve other endpoints for memory
50 #define TX_PACKET_LIMIT 3
52 // When the PC isn't listening, how long do we wait before discarding data?
53 #define TX_TIMEOUT_MSEC 30
55 #if F_CPU == 168000000
56 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 1100)
57 #elif F_CPU == 144000000
58 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 932)
59 #elif F_CPU == 120000000
60 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 764)
61 #elif F_CPU == 96000000
62 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 596)
63 #elif F_CPU == 72000000
64 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 512)
65 #elif F_CPU == 48000000
66 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 428)
67 #elif F_CPU == 24000000
68 #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 262)
73 // ----- Variables -----
75 uint32_t usb_joystick_data[3];
78 static uint8_t transmit_previous_timeout = 0;
82 // ----- Functions -----
84 int usb_joystick_send()
86 uint32_t wait_count=0;
87 usb_packet_t *tx_packet;
89 //serial_print("send");
92 if (!usb_configuration) {
93 //serial_print("error1\n");
96 if (usb_tx_packet_count(JOYSTICK_ENDPOINT) < TX_PACKET_LIMIT) {
97 tx_packet = usb_malloc();
100 if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {
101 transmit_previous_timeout = 1;
102 //serial_print("error2\n");
107 transmit_previous_timeout = 0;
108 memcpy(tx_packet->buf, usb_joystick_data, 12);
110 usb_tx(JOYSTICK_ENDPOINT, tx_packet);
111 //serial_print("ok\n");