移植 CH376 USB FAT12/16/32文件系统芯片单片机 MCU51_单片机_单片机开发

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/62682d5f4c65f412597ada68/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62682d5f4c65f412597ada68/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 1 / 14 </div><div class="t m0 x2 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x3 h3 y3 ff3 fs1 fc0 sc1 ls3 ws0">移植 CH376 USB </div><div class="t m0 x4 h3 y4 ff2 fs1 fc0 sc0 ls0 ws0">FAT12/16/32 文件系统芯片 </div><div class="t m0 x5 h3 y5 ff3 fs1 fc0 sc1 ls3 ws0">单片机 MCU51 </div><div class="t m0 x2 h4 y6 ff3 fs2 fc1 sc2 ls0 ws0">目录 </div><div class="t m0 x2 h5 y7 ff1 fs3 fc0 sc0 ls0 ws0">1 概述：....................................................................................................................................... 1 </div><div class="t m0 x2 h5 y8 ff1 fs3 fc0 sc0 ls0 ws0">2 源码文件列表： ....................................................................................................................... 2 </div><div class="t m0 x2 h5 y9 ff1 fs3 fc0 sc0 ls0 ws0">3 结构图： ................................................................................................................................... 3 </div><div class="t m0 x2 h5 ya ff1 fs3 fc0 sc0 ls0 ws0">4 电路原理图参考： ................................................................................................................... 4 </div><div class="t m0 x6 h5 yb ff1 fs3 fc0 sc0 ls0 ws0">4.1 通讯接口的选择： ....................................................................................................... 5 </div><div class="t m0 x2 h5 yc ff1 fs3 fc0 sc0 ls0 ws0">5 DEMO 程序详解： .................................................................................................................. 5 </div><div class="t m0 x6 h5 yd ff1 fs3 fc0 sc0 ls0 ws0">5.1 头文件： ....................................................................................................................... 5 </div><div class="t m0 x6 h5 ye ff1 fs3 fc0 sc0 ls0 ws0">5.2 缓存 BUFFER： ............................................................................................................. 6 </div><div class="t m0 x6 h5 yf ff1 fs3 fc0 sc0 ls0 ws0">5.3 调试信息： ................................................................................................................... 6 </div><div class="t m0 x6 h5 y10 ff1 fs3 fc0 sc0 ls0 ws0">5.4 SPI 通讯模式： ............................................................................................................. 6 </div><div class="t m0 x7 h5 y11 ff1 fs3 fc0 sc0 ls0 ws0">5.4.1 SPI 单片机 IO 脚配置： .................................................................................. 7 </div><div class="t m0 x6 h5 y12 ff1 fs3 fc0 sc0 ls0 ws0">5.5 UART 通讯模式： ......................................................................................................... 7 </div><div class="t m0 x7 h5 y13 ff1 fs3 fc0 sc0 ls0 ws0">5.5.1 串口参数设置： ............................................................................................... 7 </div><div class="t m0 x7 h5 y14 ff1 fs3 fc0 sc0 ls0 ws0">5.5.2 CH376 DATASHEET 串口说明： ........................................................................ 8 </div><div class="t m0 x6 h5 y15 ff1 fs3 fc0 sc0 ls0 ws0">5.6 检测 U 盘插入： .......................................................................................................... 8 </div><div class="t m0 x6 h5 y16 ff1 fs3 fc0 sc0 ls0 ws0">5.7 U 盘拔出： ................................................................................................................... 9 </div><div class="t m0 x6 h5 y17 ff1 fs3 fc0 sc0 ls0 ws0">5.8 创建目录： ................................................................................................................. 10 </div><div class="t m0 x6 h5 y18 ff1 fs3 fc0 sc0 ls0 ws0">5.9 写文件： ..................................................................................................................... 10 </div><div class="t m0 x6 h5 y19 ff1 fs3 fc0 sc0 ls0 ws0">5.10 读文件： ................................................................................................................. 11 </div><div class="t m0 x6 h5 y1a ff1 fs3 fc0 sc0 ls0 ws0">5.11 删除文件： ............................................................................................................. 12 </div><div class="t m0 x6 h5 y1b ff1 fs3 fc0 sc0 ls0 ws0">5.12 main()函数： .............................................................................................................. 13 </div><div class="t m0 x2 h5 y1c ff1 fs3 fc0 sc0 ls0 ws0">6 总结：..................................................................................................................................... 14 </div><div class="t m0 x6 h5 y1d ff1 fs3 fc0 sc0 ls0 ws0">6.1 优点： ......................................................................................................................... 14 </div><div class="t m0 x6 h5 y1e ff1 fs3 fc0 sc0 ls0 ws0">6.2 不足： ......................................................................................................................... 14 </div><div class="t m0 x2 h6 y1f ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h7 y20 ff2 fs4 fc0 sc0 ls0 ws0">1 概述： </div><div class="t m0 x2 h5 y21 ff1 fs3 fc0 sc0 ls0 ws0">CH376 做为一颗国产 USB 芯片（南京沁恒电子），支持 HOST,SLAVE 模式，相比前期版本 CH375，</div><div class="t m0 x2 h5 y22 ff1 fs3 fc0 sc0 ls0 ws0">CH376 内部自带了 FAT12/16/32 文件系统，避免了 MCU 需要去处理庞大的文件系统库，将系</div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' 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m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62682d5f4c65f412597ada68/bg2.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 2 / 14 </div><div class="t m0 x2 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y23 ff3 fs3 fc0 sc0 ls0 ws0">统开销降到很低，甚至一颗 89C51 就能顺利的运行起来，内存占用极低。并提供部分向上</div><div class="t m0 x2 h5 y24 ff3 fs3 fc0 sc0 ls0 ws0">兼容。价格方面与市面同类产品差不多（如：PB375，SL811 等），大概十几元左右，优势在</div><div class="t m0 x2 h5 y25 ff3 fs3 fc0 sc0 ls0 ws0">于稳定性稍好一些。 </div><div class="t m0 x2 h8 y26 ff2 fs5 fc3 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y27 ff3 fs3 fc0 sc0 ls0 ws0">编译器：Keil3 C51 v8.18 </div><div class="t m0 x2 h5 y28 ff3 fs3 fc0 sc0 ls0 ws0">单片机：SST89X516RD </div><div class="t m0 x2 h9 y29 ff1 fs3 fc0 sc0 ls0 ws0">USB 芯片：CH376S（SOP-28PIN） </div><div class="t m0 x2 h5 y2a ff3 fs3 fc0 sc0 ls0 ws0">通讯接口：SPI，串口，总线并口（略） </div><div class="t m0 x2 h6 y2b ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y2c ff3 fs3 fc0 sc0 ls0 ws0">由于对读写速度没有特别要求，加上占用 IO 脚考虑，本文并没有说明 CH376 总线模式和 IO</div><div class="t m0 x2 h5 y2d ff3 fs3 fc0 sc0 ls0 ws0">模拟总线模式，采用 SPI 或串口通讯。 </div><div class="t m0 x2 h6 y2e ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y2f ff3 fs3 fc0 sc0 ls0 ws0">本文主要说明 CH376 以 HOST 模式读写 U 盘为例，CH376 功能非常强大，如：与 SD 卡，键</div><div class="t m0 x2 h5 y30 ff3 fs3 fc0 sc0 ls0 ws0">盘，鼠标，打印机等通讯，SLAVE 模式，并没有进行描述。 </div><div class="t m0 x2 h6 y31 ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y32 ff1 fs3 fc0 sc0 ls0 ws0">CH376 对大小写支持不好，所有路径，文件名必须为全大写（datasheet 有说明），分别以小、</div><div class="t m0 x2 h5 y33 ff3 fs3 fc0 sc0 ls0 ws0">大小写混合名称测试，函数也会返回成功，但实际没有效果，到 PC 上查看并没有产生文件</div><div class="t m0 x2 h5 y34 ff3 fs3 fc0 sc0 ls0 ws0">或读写成功，还会造成同名文件产生。 </div><div class="t m0 x2 h6 y35 ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h7 y36 ff2 fs4 fc0 sc0 ls0 ws0">2 源码文件列表： </div><div class="t m0 x2 h5 y37 ff1 fs3 fc0 sc0 ls0 ws0">HAL.H 声明了一些设备接口函数，如：CH376_PORT_INIT，mInitCH376Host，xWriteCH376Cmd，</div><div class="t m0 x2 h5 y38 ff1 fs3 fc0 sc0 ls0 ws0">xReadCH376Data，xWriteCH376Data 等，而这些函数分别是在 SPI_SW.C，UART_HW.C 等这些</div><div class="t m0 x2 h5 y39 ff3 fs3 fc0 sc0 ls0 ws0">文件实现的，等于是把通讯接口统一封装了一次，供上层统一调用，这样做是因为 CH376</div><div class="t m0 x2 h5 y3a ff3 fs3 fc0 sc0 ls0 ws0">支持 3 总通讯模式：MCU LOCAL BUS（总线），SPI, UART，当用户选择不同的通讯模式时与</div><div class="t m0 x2 h5 y3b ff3 fs3 fc0 sc0 lsb ws0">上层应用无关，只需编译不同的通讯模块即可，非常方便（下文有详细说明）。所以像</div><div class="t m0 x2 h5 y3c ff1 fs3 fc0 sc0 ls0 ws0">SPI_SW.C，UART_HW.C 等这些文件只能任选一被编译，不能同时编译，会产生错误，函数重</div><div class="t m0 x2 h5 y3d ff3 fs3 fc0 sc0 ls0 ws0">定义。 </div><div class="t m0 x2 h6 y1a ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h5 y3e ff1 fs3 fc0 sc0 ls0 ws0">CH376 官方提供的解决办法是通过#include 包含不同 C 文件来进行不同通讯模块选择，本文</div><div class="t m0 x2 h5 y3f ff3 fs3 fc0 sc0 ls0 ws0">不建议这样使用，这会破坏 C 语言的文件结构（一般情况#include 只包含.h 头文件），根据</div><div class="t m0 x2 h5 y40 ff3 fs3 fc0 sc0 ls0 ws0">需要将 C 文件加入 keil 工程管理中更好（#include C 文件方式无法 debug 断点行）。 </div><div class="t m0 x2 h6 y1e ff1 fs3 fc0 sc0 ls0 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62682d5f4c65f412597ada68/bg3.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> 3 / 14 </div><div class="t m0 x2 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x8 h6 y41 ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h6 y2e ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h7 y42 ff2 fs4 fc0 sc0 ls0 ws0">3 结构图： </div><div class="t m0 x2 h5 y43 ff3 fs3 fc0 sc0 ls0 ws0">主机设备一般指：U 盘，SD 卡，鼠标，打印机等特定功能的 USB 设备，响应 USB HOST 命令，</div><div class="t m0 x2 h5 y44 ff3 fs3 fc0 sc0 ls0 ws0">从机设备一般指 PC，单片机，CPU 等主动发出命令设备。其目的都是进行 USB 总线通讯，</div><div class="t m0 x2 h5 y45 ff3 fs3 fc0 sc0 ls0 ws0">对其进行规范而已。 </div><div class="t m0 x9 h6 y46 ff1 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h6 y47 ff1 fs3 fc0 sc0 ls0 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

移植 CH376 USB FAT12/16/32文件系统芯片 单片机 MCU51

移植 CH376 USB FAT12/16/32文件系统芯片单片机 MCU51