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2025-05-09 00:21:44 +08:00 · 2024-11-27 11:50:16 +00:00 · 2024-11-27 11:50:16 +00:00 · aee8628bda
commit aee8628bda
parent 7be398718a
10 changed files with 407 additions and 4 deletions
--- a/_sources/demo/usbd_cdc_acm.rst.txt
+++ b/_sources/demo/usbd_cdc_acm.rst.txt
@ -1,2 +1,101 @@
 usbd_cdc_acm
 ===============
+
+本 demo 主要用于演示 cdc acm 功能，包含收发测试，DTR 控制，ZLP 测试，性能测试。
+
+- 开辟读写 buffer，用于收发数据，并且buffer需要用 nocache 修饰，这里我们读写都是用 2048字节，是为了后面的 ZLP 测试和性能测试使用。
+
+.. code-block:: C
+
+    USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[2048]; /* 2048 is only for test speed , please use CDC_MAX_MPS for common*/
+    USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t write_buffer[2048];
+
+
+- 协议栈回调中，我们需要在枚举完成后启动第一次传输，并清除相关 flag，可以在 reset 事件中清除，也可以在 configured 事件中清除。
+
+.. code-block:: C
+
+    static void usbd_event_handler(uint8_t busid, uint8_t event)
+    {
+        switch (event) {
+            case USBD_EVENT_RESET:
+                break;
+            case USBD_EVENT_CONNECTED:
+                break;
+            case USBD_EVENT_DISCONNECTED:
+                break;
+            case USBD_EVENT_RESUME:
+                break;
+            case USBD_EVENT_SUSPEND:
+                break;
+            case USBD_EVENT_CONFIGURED:
+                ep_tx_busy_flag = false;
+                /* setup first out ep read transfer */
+                usbd_ep_start_read(busid, CDC_OUT_EP, read_buffer, 2048);
+                break;
+            case USBD_EVENT_SET_REMOTE_WAKEUP:
+                break;
+            case USBD_EVENT_CLR_REMOTE_WAKEUP:
+                break;
+
+            default:
+                break;
+        }
+    }
+
+- 在接收完成中断中继续发起接收；在发送完成中断中判断是否需要发送 ZLP。
+
+.. code-block:: C
+
+    void usbd_cdc_acm_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
+    {
+        USB_LOG_RAW("actual out len:%d\r\n", nbytes);
+        // for (int i = 0; i < 100; i++) {
+        //     printf("%02x ", read_buffer[i]);
+        // }
+        // printf("\r\n");
+        /* setup next out ep read transfer */
+        usbd_ep_start_read(busid, CDC_OUT_EP, read_buffer, 2048);
+    }
+
+    void usbd_cdc_acm_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
+    {
+        USB_LOG_RAW("actual in len:%d\r\n", nbytes);
+
+        if ((nbytes % usbd_get_ep_mps(busid, ep)) == 0 && nbytes) {
+            /* send zlp */
+            usbd_ep_start_write(busid, CDC_IN_EP, NULL, 0);
+        } else {
+            ep_tx_busy_flag = false;
+        }
+    }
+
+- 以下是为了测试 DTR 功能并控制 USB 发送，DTR 和 RTS 只用于搭配 UART 使用，如果是纯 USB，没什么用，这里仅做测试。DTR 开关使用任意串口上位机并勾选 DTR。
+
+.. code-block:: C
+
+    void usbd_cdc_acm_set_dtr(uint8_t busid, uint8_t intf, bool dtr)
+    {
+        if (dtr) {
+            dtr_enable = 1;
+        } else {
+            dtr_enable = 0;
+        }
+    }
+
+- 在主函数中一直调用发送即可
+
+.. code-block:: C
+
+    void cdc_acm_data_send_with_dtr_test(uint8_t busid)
+    {
+        if (dtr_enable) {
+            ep_tx_busy_flag = true;
+            usbd_ep_start_write(busid, CDC_IN_EP, write_buffer, 2048);
+            while (ep_tx_busy_flag) {
+            }
+        }
+    }
+
+- 上述我们需要注意，长度设置为 2048 是为了测试 ZLP 功能，通常实际使用时，接收长度应该使用 CDC_MAX_MPS 。具体原因参考 :ref:`usb_ext`
+- 如果需要做性能测试，使用 tools/test_srcipts/test_cdc_speed.py 进行测试,并在测试之前删除 `usbd_cdc_acm_bulk_out` 和 `usbd_cdc_acm_bulk_in` 中的打印，否则会影响测试结果。
--- a/_sources/demo/usbd_video.rst.txt
+++ b/_sources/demo/usbd_video.rst.txt
@ -1,2 +1,83 @@
 usbd_video
 ===============
+
+本节主要演示 USB UAC 功能，支持 YUYV, MJPEG, H264 格式。为了方便演示，都采用的静态图。
+
+demo 包含 **video_static_yuyv_template**, **video_static_mjpeg_template**, **video_static_h264_template**, 仅描述符和图片数据不同。
+
+- 在高速模式下，默认最大是1024字节，但是如果芯片支持 additional transcations，可以配置为最高 2048字节或者3072字节，这样可以提高传输效率。
+
+.. code-block:: C
+
+    #ifdef CONFIG_USB_HS
+    #define MAX_PAYLOAD_SIZE  1024 // for high speed with one transcations every one micro frame
+    #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 << 11))
+
+    // #define MAX_PAYLOAD_SIZE  2048 // for high speed with two transcations every one micro frame
+    // #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 2)) | (0x01 << 11))
+
+    // #define MAX_PAYLOAD_SIZE  3072 // for high speed with three transcations every one micro frame
+    // #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 3)) | (0x02 << 11))
+
+    #else
+    #define MAX_PAYLOAD_SIZE  1020
+    #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 << 11))
+    #endif
+
+- 通常只需要修改 WIDTH 和 HEIGHT
+
+.. code-block:: C
+
+    #define WIDTH  (unsigned int)(640)
+    #define HEIGHT (unsigned int)(480)
+
+    #define CAM_FPS        (30)
+    #define INTERVAL       (unsigned long)(10000000 / CAM_FPS)
+    #define MIN_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS) //16 bit
+    #define MAX_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS)
+    #define MAX_FRAME_SIZE (unsigned long)(WIDTH * HEIGHT * 2)
+
+- USB 端点配置，默认 interval 为 1，也就是全速模式下 1ms，高速模式下 125us。同步类型使用异步模式。
+
+.. code-block:: C
+
+    /* 1.2.2.2 Standard VideoStream Isochronous Video Data Endpoint Descriptor */
+    USB_ENDPOINT_DESCRIPTOR_INIT(VIDEO_IN_EP, 0x05, VIDEO_PACKET_SIZE, 0x01),
+
+
+- 使用 `usbd_video_stream_start_write` 传输数据
+
+1，传输采用双缓冲的形式， **MAX_PACKETS_IN_ONE_TRANSFER** 表示一次传输可以携带多少个 **MAX_PAYLOAD_SIZE**，通常 IP 只能为 1。
+
+2，在中断完成中，调用 `usbd_video_stream_split_transfer` 继续下一次传输，直到返回为 true 表示传输完成。这边的分裂传输只是表示将图片数据拆成 **MAX_PACKETS_IN_ONE_TRANSFER * MAX_PAYLOAD_SIZE** 份传输。
+
+3，通常 IP 不支持一次传输非常大的数据，比如传输 1MB，因此需要做分裂传输，但是会增加中断次数。并且一次传输非常大数据也是需要足够的 RAM。
+
+.. code-block:: C
+
+    void usbd_video_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
+    {
+        if (usbd_video_stream_split_transfer(busid, ep)) {
+            /* one frame has done */
+            iso_tx_busy = false;
+        }
+    }
+
+    USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t packet_buffer[2][MAX_PACKETS_IN_ONE_TRANSFER * MAX_PAYLOAD_SIZE];
+
+    void video_test(uint8_t busid)
+    {
+        memset(packet_buffer, 0, sizeof(packet_buffer));
+
+        while (1) {
+            if (tx_flag) {
+                iso_tx_busy = true;
+                usbd_video_stream_start_write(busid, VIDEO_IN_EP, &packet_buffer[0][0], &packet_buffer[1][0], MAX_PACKETS_IN_ONE_TRANSFER * MAX_PAYLOAD_SIZE, (uint8_t *)cherryusb_mjpeg, sizeof(cherryusb_mjpeg));
+                while (iso_tx_busy) {
+                    if (tx_flag == 0) {
+                        break;
+                    }
+                }
+            }
+        }
+    }
--- a/_sources/quick_start/demo.rst.txt
+++ b/_sources/quick_start/demo.rst.txt
@ -33,9 +33,32 @@

 仓库参考：https://gitee.com/phytium_embedded/phytium-free-rtos-sdk

- 飞腾派支持两个 USB3.0 主机， 两个 USB2.0 主从机
+- 飞腾派支持两个 USB3.0 主机（采用 XHCI）， 两个 USB2.0 主从机
 - USB 的相关应用位于 `example/peripheral/usb` ，根据官方环境搭建完成后，即可编译使用。

+基于 Essemi 系列芯片
+---------------------------
+
+仓库参考：https://github.com/CherryUSB/cherryusb_es32
+
+- 支持全速和高速主从机
+
+基于 NXP MCX系列芯片
+---------------------------
+
+仓库参考：https://github.com/CherryUSB/cherryusb_mcx 或者 https://github.com/RT-Thread/rt-thread/tree/master/bsp/nxp/mcx
+
+- 支持全速 IP 和高速 IP， 高速 IP 支持主机和从机
+
+- 支持全速和高速主从机
+
+基于 Artinchip 系列芯片
+---------------------------
+
+仓库参考：https://gitee.com/artinchip/luban-lite
+
+- 支持全速和高速主从机，主机采用 EHCI + OHCI。
+
 基于 ST 系列芯片
 ---------------------------

--- a/_sources/usb/usb_ext.rst.txt
+++ b/_sources/usb/usb_ext.rst.txt
@ -1,3 +1,5 @@
+.. _usb_ext:
+
 USB 知识点拓展
 ===========================

--- a/demo/usbd_cdc_acm.html
+++ b/demo/usbd_cdc_acm.html
@ -151,6 +151,104 @@
             
  <section id="usbd-cdc-acm">
 <h1>usbd_cdc_acm<a class="headerlink" href="#usbd-cdc-acm" title="Link to this heading"></a></h1>
+<p>本 demo 主要用于演示 cdc acm 功能，包含收发测试，DTR 控制，ZLP 测试，性能测试。</p>
+<ul class="simple">
+<li><p>开辟读写 buffer，用于收发数据，并且buffer需要用 nocache 修饰，这里我们读写都是用 2048字节，是为了后面的 ZLP 测试和性能测试使用。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="n">USB_NOCACHE_RAM_SECTION</span><span class="w"> </span><span class="n">USB_MEM_ALIGNX</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">read_buffer</span><span class="p">[</span><span class="mi">2048</span><span class="p">];</span><span class="w"> </span><span class="cm">/* 2048 is only for test speed , please use CDC_MAX_MPS for common*/</span>
+<span class="n">USB_NOCACHE_RAM_SECTION</span><span class="w"> </span><span class="n">USB_MEM_ALIGNX</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">write_buffer</span><span class="p">[</span><span class="mi">2048</span><span class="p">];</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>协议栈回调中，我们需要在枚举完成后启动第一次传输，并清除相关 flag，可以在 reset 事件中清除，也可以在 configured 事件中清除。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">usbd_event_handler</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">event</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="k">switch</span><span class="w"> </span><span class="p">(</span><span class="n">event</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_RESET</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_CONNECTED</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_DISCONNECTED</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_RESUME</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_SUSPEND</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_CONFIGURED</span><span class="p">:</span>
+<span class="w">            </span><span class="n">ep_tx_busy_flag</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
+<span class="w">            </span><span class="cm">/* setup first out ep read transfer */</span>
+<span class="w">            </span><span class="n">usbd_ep_start_read</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">CDC_OUT_EP</span><span class="p">,</span><span class="w"> </span><span class="n">read_buffer</span><span class="p">,</span><span class="w"> </span><span class="mi">2048</span><span class="p">);</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_SET_REMOTE_WAKEUP</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">        </span><span class="k">case</span><span class="w"> </span><span class="no">USBD_EVENT_CLR_REMOTE_WAKEUP</span><span class="p">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+
+<span class="w">        </span><span class="k">default</span><span class="o">:</span>
+<span class="w">            </span><span class="k">break</span><span class="p">;</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>在接收完成中断中继续发起接收；在发送完成中断中判断是否需要发送 ZLP。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbd_cdc_acm_bulk_out</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">ep</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">nbytes</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="n">USB_LOG_RAW</span><span class="p">(</span><span class="s">&quot;actual out len:%d</span><span class="se">\r\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">nbytes</span><span class="p">);</span>
+<span class="w">    </span><span class="c1">// for (int i = 0; i &lt; 100; i++) {</span>
+<span class="w">    </span><span class="c1">//     printf(&quot;%02x &quot;, read_buffer[i]);</span>
+<span class="w">    </span><span class="c1">// }</span>
+<span class="w">    </span><span class="c1">// printf(&quot;\r\n&quot;);</span>
+<span class="w">    </span><span class="cm">/* setup next out ep read transfer */</span>
+<span class="w">    </span><span class="n">usbd_ep_start_read</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">CDC_OUT_EP</span><span class="p">,</span><span class="w"> </span><span class="n">read_buffer</span><span class="p">,</span><span class="w"> </span><span class="mi">2048</span><span class="p">);</span>
+<span class="p">}</span>
+
+<span class="kt">void</span><span class="w"> </span><span class="nf">usbd_cdc_acm_bulk_in</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">ep</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">nbytes</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="n">USB_LOG_RAW</span><span class="p">(</span><span class="s">&quot;actual in len:%d</span><span class="se">\r\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">nbytes</span><span class="p">);</span>
+
+<span class="w">    </span><span class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">nbytes</span><span class="w"> </span><span class="o">%</span><span class="w"> </span><span class="n">usbd_get_ep_mps</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">ep</span><span class="p">))</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">nbytes</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="cm">/* send zlp */</span>
+<span class="w">        </span><span class="n">usbd_ep_start_write</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">CDC_IN_EP</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span>
+<span class="w">    </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="n">ep_tx_busy_flag</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>以下是为了测试 DTR 功能并控制 USB 发送，DTR 和 RTS 只用于搭配 UART 使用，如果是纯 USB，没什么用，这里仅做测试。DTR 开关使用任意串口上位机并勾选 DTR。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbd_cdc_acm_set_dtr</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">intf</span><span class="p">,</span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">dtr</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">dtr</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="n">dtr_enable</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
+<span class="w">    </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="n">dtr_enable</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>在主函数中一直调用发送即可</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">cdc_acm_data_send_with_dtr_test</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">dtr_enable</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="n">ep_tx_busy_flag</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
+<span class="w">        </span><span class="n">usbd_ep_start_write</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">CDC_IN_EP</span><span class="p">,</span><span class="w"> </span><span class="n">write_buffer</span><span class="p">,</span><span class="w"> </span><span class="mi">2048</span><span class="p">);</span>
+<span class="w">        </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">ep_tx_busy_flag</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="p">}</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>上述我们需要注意，长度设置为 2048 是为了测试 ZLP 功能，通常实际使用时，接收长度应该使用 CDC_MAX_MPS 。具体原因参考 <a class="reference internal" href="../usb/usb_ext.html#usb-ext"><span class="std std-ref">USB 知识点拓展</span></a></p></li>
+<li><p>如果需要做性能测试，使用 tools/test_srcipts/test_cdc_speed.py 进行测试,并在测试之前删除 <cite>usbd_cdc_acm_bulk_out</cite> 和 <cite>usbd_cdc_acm_bulk_in</cite> 中的打印，否则会影响测试结果。</p></li>
+</ul>
 </section>


--- a/demo/usbd_video.html
+++ b/demo/usbd_video.html
@ -151,6 +151,81 @@
             
  <section id="usbd-video">
 <h1>usbd_video<a class="headerlink" href="#usbd-video" title="Link to this heading"></a></h1>
+<p>本节主要演示 USB UAC 功能，支持 YUYV, MJPEG, H264 格式。为了方便演示，都采用的静态图。</p>
+<p>demo 包含 <strong>video_static_yuyv_template</strong>, <strong>video_static_mjpeg_template</strong>, <strong>video_static_h264_template</strong>, 仅描述符和图片数据不同。</p>
+<ul class="simple">
+<li><p>在高速模式下，默认最大是1024字节，但是如果芯片支持 additional transcations，可以配置为最高 2048字节或者3072字节，这样可以提高传输效率。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="cp">#ifdef CONFIG_USB_HS</span>
+<span class="cp">#define MAX_PAYLOAD_SIZE  1024 </span><span class="c1">// for high speed with one transcations every one micro frame</span>
+<span class="cp">#define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 &lt;&lt; 11))</span>
+
+<span class="c1">// #define MAX_PAYLOAD_SIZE  2048 // for high speed with two transcations every one micro frame</span>
+<span class="c1">// #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 2)) | (0x01 &lt;&lt; 11))</span>
+
+<span class="c1">// #define MAX_PAYLOAD_SIZE  3072 // for high speed with three transcations every one micro frame</span>
+<span class="c1">// #define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 3)) | (0x02 &lt;&lt; 11))</span>
+
+<span class="cp">#else</span>
+<span class="cp">#define MAX_PAYLOAD_SIZE  1020</span>
+<span class="cp">#define VIDEO_PACKET_SIZE (unsigned int)(((MAX_PAYLOAD_SIZE / 1)) | (0x00 &lt;&lt; 11))</span>
+<span class="cp">#endif</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>通常只需要修改 WIDTH 和 HEIGHT</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="cp">#define WIDTH  (unsigned int)(640)</span>
+<span class="cp">#define HEIGHT (unsigned int)(480)</span>
+
+<span class="cp">#define CAM_FPS        (30)</span>
+<span class="cp">#define INTERVAL       (unsigned long)(10000000 / CAM_FPS)</span>
+<span class="cp">#define MIN_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS) </span><span class="c1">//16 bit</span>
+<span class="cp">#define MAX_BIT_RATE   (unsigned long)(WIDTH * HEIGHT * 16 * CAM_FPS)</span>
+<span class="cp">#define MAX_FRAME_SIZE (unsigned long)(WIDTH * HEIGHT * 2)</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>USB 端点配置，默认 interval 为 1，也就是全速模式下 1ms，高速模式下 125us。同步类型使用异步模式。</p></li>
+</ul>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="cm">/* 1.2.2.2 Standard VideoStream Isochronous Video Data Endpoint Descriptor */</span>
+<span class="n">USB_ENDPOINT_DESCRIPTOR_INIT</span><span class="p">(</span><span class="n">VIDEO_IN_EP</span><span class="p">,</span><span class="w"> </span><span class="mh">0x05</span><span class="p">,</span><span class="w"> </span><span class="n">VIDEO_PACKET_SIZE</span><span class="p">,</span><span class="w"> </span><span class="mh">0x01</span><span class="p">),</span>
+</pre></div>
+</div>
+<ul class="simple">
+<li><p>使用 <cite>usbd_video_stream_start_write</cite> 传输数据</p></li>
+</ul>
+<p>1，传输采用双缓冲的形式， <strong>MAX_PACKETS_IN_ONE_TRANSFER</strong> 表示一次传输可以携带多少个 <strong>MAX_PAYLOAD_SIZE</strong>，通常 IP 只能为 1。</p>
+<p>2，在中断完成中，调用 <cite>usbd_video_stream_split_transfer</cite> 继续下一次传输，直到返回为 true 表示传输完成。这边的分裂传输只是表示将图片数据拆成 <strong>MAX_PACKETS_IN_ONE_TRANSFER * MAX_PAYLOAD_SIZE</strong> 份传输。</p>
+<p>3，通常 IP 不支持一次传输非常大的数据，比如传输 1MB，因此需要做分裂传输，但是会增加中断次数。并且一次传输非常大数据也是需要足够的 RAM。</p>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbd_video_iso_callback</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">ep</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">nbytes</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">usbd_video_stream_split_transfer</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">ep</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="cm">/* one frame has done */</span>
+<span class="w">        </span><span class="n">iso_tx_busy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">false</span><span class="p">;</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+
+<span class="n">USB_NOCACHE_RAM_SECTION</span><span class="w"> </span><span class="n">USB_MEM_ALIGNX</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">packet_buffer</span><span class="p">[</span><span class="mi">2</span><span class="p">][</span><span class="n">MAX_PACKETS_IN_ONE_TRANSFER</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">MAX_PAYLOAD_SIZE</span><span class="p">];</span>
+
+<span class="kt">void</span><span class="w"> </span><span class="nf">video_test</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">)</span>
+<span class="p">{</span>
+<span class="w">    </span><span class="n">memset</span><span class="p">(</span><span class="n">packet_buffer</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="n">packet_buffer</span><span class="p">));</span>
+
+<span class="w">    </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">tx_flag</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">            </span><span class="n">iso_tx_busy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">true</span><span class="p">;</span>
+<span class="w">            </span><span class="n">usbd_video_stream_start_write</span><span class="p">(</span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="n">VIDEO_IN_EP</span><span class="p">,</span><span class="w"> </span><span class="o">&amp;</span><span class="n">packet_buffer</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">],</span><span class="w"> </span><span class="o">&amp;</span><span class="n">packet_buffer</span><span class="p">[</span><span class="mi">1</span><span class="p">][</span><span class="mi">0</span><span class="p">],</span><span class="w"> </span><span class="n">MAX_PACKETS_IN_ONE_TRANSFER</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">MAX_PAYLOAD_SIZE</span><span class="p">,</span><span class="w"> </span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="n">cherryusb_mjpeg</span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="p">(</span><span class="n">cherryusb_mjpeg</span><span class="p">));</span>
+<span class="w">            </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">iso_tx_busy</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">                </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">tx_flag</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">                    </span><span class="k">break</span><span class="p">;</span>
+<span class="w">                </span><span class="p">}</span>
+<span class="w">            </span><span class="p">}</span>
+<span class="w">        </span><span class="p">}</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
 </section>


--- a/objects.inv
+++ b/objects.inv
--- a/quick_start/demo.html
+++ b/quick_start/demo.html
@ -50,6 +50,9 @@
 <li class="toctree-l2"><a class="reference internal" href="#hpmicro">基于 HPMicro 系列芯片</a></li>
 <li class="toctree-l2"><a class="reference internal" href="#esp32s2-s3-p4">基于 esp32s2/s3/p4 系列芯片</a></li>
 <li class="toctree-l2"><a class="reference internal" href="#id1">基于飞腾派系列芯片</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#essemi">基于 Essemi 系列芯片</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#nxp-mcx">基于 NXP MCX系列芯片</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#artinchip">基于 Artinchip 系列芯片</a></li>
 <li class="toctree-l2"><a class="reference internal" href="#st">基于 ST 系列芯片</a><ul>
 <li class="toctree-l3"><a class="reference internal" href="#usb-device">USB Device 移植要点</a></li>
 <li class="toctree-l3"><a class="reference internal" href="#usb-host">USB Host 移植要点</a></li>
@ -192,10 +195,32 @@
 <h2>基于飞腾派系列芯片<a class="headerlink" href="#id1" title="Link to this heading"></a></h2>
 <p>仓库参考：<a class="reference external" href="https://gitee.com/phytium_embedded/phytium-free-rtos-sdk">https://gitee.com/phytium_embedded/phytium-free-rtos-sdk</a></p>
 <ul class="simple">
-<li><p>飞腾派支持两个 USB3.0 主机， 两个 USB2.0 主从机</p></li>
+<li><p>飞腾派支持两个 USB3.0 主机（采用 XHCI）， 两个 USB2.0 主从机</p></li>
 <li><p>USB 的相关应用位于 <cite>example/peripheral/usb</cite> ，根据官方环境搭建完成后，即可编译使用。</p></li>
 </ul>
 </section>
+<section id="essemi">
+<h2>基于 Essemi 系列芯片<a class="headerlink" href="#essemi" title="Link to this heading"></a></h2>
+<p>仓库参考：<a class="reference external" href="https://github.com/CherryUSB/cherryusb_es32">https://github.com/CherryUSB/cherryusb_es32</a></p>
+<ul class="simple">
+<li><p>支持全速和高速主从机</p></li>
+</ul>
+</section>
+<section id="nxp-mcx">
+<h2>基于 NXP MCX系列芯片<a class="headerlink" href="#nxp-mcx" title="Link to this heading"></a></h2>
+<p>仓库参考：<a class="reference external" href="https://github.com/CherryUSB/cherryusb_mcx">https://github.com/CherryUSB/cherryusb_mcx</a> 或者 <a class="reference external" href="https://github.com/RT-Thread/rt-thread/tree/master/bsp/nxp/mcx">https://github.com/RT-Thread/rt-thread/tree/master/bsp/nxp/mcx</a></p>
+<ul class="simple">
+<li><p>支持全速 IP 和高速 IP， 高速 IP 支持主机和从机</p></li>
+<li><p>支持全速和高速主从机</p></li>
+</ul>
+</section>
+<section id="artinchip">
+<h2>基于 Artinchip 系列芯片<a class="headerlink" href="#artinchip" title="Link to this heading"></a></h2>
+<p>仓库参考：<a class="reference external" href="https://gitee.com/artinchip/luban-lite">https://gitee.com/artinchip/luban-lite</a></p>
+<ul class="simple">
+<li><p>支持全速和高速主从机，主机采用 EHCI + OHCI。</p></li>
+</ul>
+</section>
 <section id="st">
 <h2>基于 ST 系列芯片<a class="headerlink" href="#st" title="Link to this heading"></a></h2>
 <p>仓库参考：<a class="reference external" href="https://github.com/CherryUSB/cherryusb_stm32">https://github.com/CherryUSB/cherryusb_stm32</a></p>
--- a/searchindex.js
+++ b/searchindex.js
--- a/usb/usb_ext.html
+++ b/usb/usb_ext.html
@ -156,7 +156,7 @@
           <div itemprop="articleBody">
             
  <section id="usb">
-<h1>USB 知识点拓展<a class="headerlink" href="#usb" title="Link to this heading"></a></h1>
+<span id="usb-ext"></span><h1>USB 知识点拓展<a class="headerlink" href="#usb" title="Link to this heading"></a></h1>
 <section id="id1">
 <h2>什么是分包<a class="headerlink" href="#id1" title="Link to this heading"></a></h2>
 <p>由于 USB 协议中规定了每个包的最大长度，所以当我们发送的数据长度超过了最大包长度时，就需要分包发送，这就是分包。比如 ep mps 为 64，数据长度为 129，则 USB 会按照 64 + 64 + 1 的形式传输。