225 lines
6.3 KiB
C
225 lines
6.3 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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};
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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 video_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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// init device stack on configured roothub port
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tud_init(BOARD_TUD_RHPORT);
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while (1)
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{
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tud_task(); // tinyusb device task
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led_blinking_task();
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video_task();
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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 Video
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//--------------------------------------------------------------------+
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static unsigned frame_num = 0;
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static unsigned tx_busy = 0;
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static unsigned interval_ms = 1000 / FRAME_RATE;
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/* YUY2 frame buffer */
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#ifdef CFG_EXAMPLE_VIDEO_READONLY
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#include "images.h"
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#else
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static uint8_t frame_buffer[FRAME_WIDTH * FRAME_HEIGHT * 16 / 8];
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static void fill_color_bar(uint8_t *buffer, unsigned start_position)
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{
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/* EBU color bars
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* See also https://stackoverflow.com/questions/6939422 */
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static uint8_t const bar_color[8][4] = {
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/* Y, U, Y, V */
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{ 235, 128, 235, 128}, /* 100% White */
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{ 219, 16, 219, 138}, /* Yellow */
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{ 188, 154, 188, 16}, /* Cyan */
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{ 173, 42, 173, 26}, /* Green */
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{ 78, 214, 78, 230}, /* Magenta */
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{ 63, 102, 63, 240}, /* Red */
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{ 32, 240, 32, 118}, /* Blue */
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{ 16, 128, 16, 128}, /* Black */
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};
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uint8_t *p;
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/* Generate the 1st line */
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uint8_t *end = &buffer[FRAME_WIDTH * 2];
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unsigned idx = (FRAME_WIDTH / 2 - 1) - (start_position % (FRAME_WIDTH / 2));
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p = &buffer[idx * 4];
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for (unsigned i = 0; i < 8; ++i) {
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for (int j = 0; j < FRAME_WIDTH / (2 * 8); ++j) {
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memcpy(p, &bar_color[i], 4);
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p += 4;
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if (end <= p) {
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p = buffer;
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}
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}
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}
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/* Duplicate the 1st line to the others */
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p = &buffer[FRAME_WIDTH * 2];
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for (unsigned i = 1; i < FRAME_HEIGHT; ++i) {
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memcpy(p, buffer, FRAME_WIDTH * 2);
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p += FRAME_WIDTH * 2;
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}
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}
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#endif
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void video_task(void)
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{
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static unsigned start_ms = 0;
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static unsigned already_sent = 0;
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if (!tud_video_n_streaming(0, 0)) {
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already_sent = 0;
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frame_num = 0;
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return;
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}
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if (!already_sent) {
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already_sent = 1;
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start_ms = board_millis();
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#ifdef CFG_EXAMPLE_VIDEO_READONLY
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tud_video_n_frame_xfer(0, 0, (void*)(uintptr_t) &frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
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FRAME_WIDTH * FRAME_HEIGHT * 16/8);
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#else
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fill_color_bar(frame_buffer, frame_num);
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tud_video_n_frame_xfer(0, 0, (void*)frame_buffer, FRAME_WIDTH * FRAME_HEIGHT * 16/8);
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#endif
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}
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unsigned cur = board_millis();
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if (cur - start_ms < interval_ms) return; // not enough time
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if (tx_busy) return;
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start_ms += interval_ms;
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#ifdef CFG_EXAMPLE_VIDEO_READONLY
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tud_video_n_frame_xfer(0, 0, (void*)(uintptr_t) &frame_buffer[(frame_num % (FRAME_WIDTH / 2)) * 4],
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FRAME_WIDTH * FRAME_HEIGHT * 16/8);
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#else
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fill_color_bar(frame_buffer, frame_num);
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tud_video_n_frame_xfer(0, 0, (void*)frame_buffer, FRAME_WIDTH * FRAME_HEIGHT * 16/8);
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#endif
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}
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void tud_video_frame_xfer_complete_cb(uint_fast8_t ctl_idx, uint_fast8_t stm_idx)
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{
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(void)ctl_idx; (void)stm_idx;
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tx_busy = 0;
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/* flip buffer */
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++frame_num;
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}
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int tud_video_commit_cb(uint_fast8_t ctl_idx, uint_fast8_t stm_idx,
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video_probe_and_commit_control_t const *parameters)
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{
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(void)ctl_idx; (void)stm_idx;
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/* convert unit to ms from 100 ns */
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interval_ms = parameters->dwFrameInterval / 10000;
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return VIDEO_ERROR_NONE;
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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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