115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2013 PJRC.COM, LLC.
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* Modified by Jacob Alexander (2015)
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* 1. The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* 2. If the Software is incorporated into a build system that allows
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* selection among a list of target devices, then similar target
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* devices manufactured by PJRC.COM must be included in the list of
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* target devices and selectable in the same manner.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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// ----- Includes -----
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// Compiler Includes
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#include <string.h> // for memcpy()
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// Project Includes
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#include <Lib/OutputLib.h>
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#include <print.h>
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// Local Includes
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#include "usb_dev.h"
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#include "usb_joystick.h"
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// ----- Defines -----
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// Maximum number of transmit packets to queue so we don't starve other endpoints for memory
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#define TX_PACKET_LIMIT 3
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// When the PC isn't listening, how long do we wait before discarding data?
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#define TX_TIMEOUT_MSEC 30
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#if F_CPU == 168000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 1100)
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#elif F_CPU == 144000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 932)
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#elif F_CPU == 120000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 764)
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#elif F_CPU == 96000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 596)
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#elif F_CPU == 72000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 512)
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#elif F_CPU == 48000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 428)
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#elif F_CPU == 24000000
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#define TX_TIMEOUT (TX_TIMEOUT_MSEC * 262)
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#endif
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// ----- Variables -----
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uint32_t usb_joystick_data[3];
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static uint8_t transmit_previous_timeout = 0;
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// ----- Functions -----
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int usb_joystick_send()
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{
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uint32_t wait_count=0;
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usb_packet_t *tx_packet;
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//serial_print("send");
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//serial_print("\n");
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while (1) {
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if (!usb_configuration) {
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//serial_print("error1\n");
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return -1;
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}
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if (usb_tx_packet_count(JOYSTICK_ENDPOINT) < TX_PACKET_LIMIT) {
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tx_packet = usb_malloc();
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if (tx_packet) break;
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}
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if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {
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transmit_previous_timeout = 1;
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//serial_print("error2\n");
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return -1;
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}
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yield();
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}
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transmit_previous_timeout = 0;
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memcpy(tx_packet->buf, usb_joystick_data, 12);
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tx_packet->len = 12;
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usb_tx(JOYSTICK_ENDPOINT, tx_packet);
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//serial_print("ok\n");
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return 0;
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}
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