SD驱动问题及相关文章

叁歲伎倆 2022-07-14 15:51 172阅读 0赞

#  **    近来调了个SD卡驱动方面的问题，顺便看了一些文章，觉得不错，就拿来了，方便自己以后再看！** #

#    问题：在插拔卡时需要播放声音，但是卡在卡槽里时，休眠唤醒的时候也会发声音，开机的时候播放声音会卡 #

#    在handadddevice里处理 #

if (fSameCard)  
                \{  
  
                    delete psdDevice;  
                   
                    bSDPowerupFlag = TRUE;  
                    psdDevice = psdOldDevice;  
                \}  
                else  
                \{  
                    psdOldDevice->NotifyClient(SDCardDetectDiffType);  
                    dwRefCnt = psdOldDevice->DeRef();  
                    RemoveAllDevice();  
            bSDPowerupFlag = TRUE;  
                \}  
            \}  
            else  
            \{  
                fNewCard = TRUE;  
          bSDPowerupFlag=TRUE;  
          if(GetTickCount()>4000)  
                PlaySound(ID\_WAVE\_SDMMC\_ATTACH, NULL, SND\_FILENAME | SND\_ASYNC);     
            \}

VOID    CSDSlot::SlotStatusChangeProcessing(SD\_SLOT\_EVENT Event)  
///  
\{  
    RETAILMSG(DBG\_ZONE\_INFO,(TEXT("+++SlotStatusChangeProcessing:Event=%d"),Event));  
    switch (Event)  
    \{  
  
        case DeviceEjected:  
            HandleRemoveDevice();  
          if (bSDPowerupFlag)  
         PlaySound(ID\_WAVE\_SDMMC\_ATTACH, NULL, SND\_FILENAME | SND\_ASYNC);

break;

｝

另外就是需要在休眠的时候设置bSDPowerupFlag为false就可以了

### 文章之一：    ###

### WinCE下SD卡驱动开发--与文件系统有些关系 ###

WinCE 5.0下面SD卡驱动的开发。这是我做的第一个项目，当时做这个项目花费了相当的时间和精力，搞的我精疲力尽。几乎可以说当时对WinCE一点都不懂。也 不知道从何处下手，就东看西看。东改西改，改的是一塌糊涂。幸好老板和老大都比较宽容，给了我充裕的时间和支持，将自己有关SD卡在WinCE 5。0下面的驱动理解的点滴给记录下来，希望能够对别人有所帮助。  
    目前WinCE下面的驱动主要有两种架构，一种就是WinCE自带的三层架构（Host，BUS，Client）。另外就是直接将驱动写成Block驱动 的形式，分真正的驱动和一个专门用来Loader的程序。本人用的微软自带的三层架构，下面将较为详细的介绍一下这种架构，以及如何在这种架构下来实现 SD卡驱动。(建议大家做SD卡驱动前先将SD card的Spec看一下(下载[SDSPEC ][SDSPEC] )，知道其的一些特性，主要包括初始化流程，那些命令是干什么的。还有就是有那些内部寄存器。这些寄存器又是又通过那些命令获得的，了解了这些才能再以后能有个好的调试。) 有关SD卡的一些规格（网上一大堆到处都有）本文将不做介绍，主要介绍其在WinCE下面的实现。WinCE下面SD卡的架构如下图所示:

![SDJiaGou.JPG][]

如图所示:最下面的是你的H/W部分，其中SD Host Controller是你的SD硬件控制器部分，你写驱动需要这部分的SPEC。接着上面的SD Host Controller Driver就是你需要实现的部分了，直接和你的控制器打交道。 而BUS层则是位于Host和Client之间的一层，主要用来进行两层之间的通信，并根据不同的设备来加载不同的Client驱动，如果是SD Memory卡就加载SD Memory。如果是具有WIFI功能的SDIO卡就会加载这个SDIO WIF驱动。  
     驱动BUS Driver和Client Driver均由微软提供，但是不是微软自己写的。貌似是一个叫什么BSQUARE公司开发的。其中BUS层的代码位于C:/WINCE500 /PUBLIC/COMMON/OAK/DRIVERS/SDCARD/SDBUSDRIVER下面。（C:/WINCE500是你安装WinCE的目 录）。而Client端的代码位于C:/WINCE500/PUBLIC/COMMON/OAK/DRIVERS/SDCARD /SDCLIENTDRIVERS下面，其下面微软带了一个两个Client 驱动（BLUETOOTH 和 SDMEMORY）。下面介绍各层的主要功能，BUS层主要是：枚举板上的卡，并决定他们的类型（MMC, SD Memory or SDIO），配置合适的电流给卡，根据注册表的值加载clients，把总线要求入队列，把来自host controller的异步通知入队列，总线要求完成，SDIO 中断，设备插入/拔出，出错时重试等功能。  
其主要的处理流程主要在 sdhceventhandlers.cpp中的**handleAddDevice()** 中，在这里面包括了卡的识别，卡的上电，卡的种类的识别，加载 Client端的驱动等工作，在调试的时候，可以在这里面添加一些Debug信息，看初始化出要出错出在哪里，并根据相应的回应来驱动为什么出错。其中   
    while (NULL != pCurrentDevice)   
   \{  
        // try to load devices  
        CSDBusDriver::**SDLoadDevice** (pCurrentDevice);  
        pCurrentDevice = pCurrentDevice->pNext;  
    \}  
     这段主要就是用来根据上面得到的信息来Load Client端驱动的。其中如果仅仅是存储卡的话，就会load SDMemory.dll。而如果是SDIO WIFI卡的话，就会load相应的WIFI Client端驱动。其中初始化的流程主要就在这个函数里面实现：  
   主要的命令有：CMD5----CMD55/CMD41---CMD2--CMD3等等，具体的CMD参考SD的SPEC。这些命令均有BUS层下给HOST Controller层的。  
   其中Host Controller层主要实现将命令下给H/W，并且得到相应的Response，把这些response按照相应的格式放到某个Buffer中，传给 bus层，由bus层来处理。bus**层就是根据这些response来确定卡的类型，卡的大小，卡的传输速度，卡的一些属性的。**  
    卡的读写： 文件系统的读写会先到SDMemory层，SDMemory先将CardIO转化为DISKIO然后通过BUS层传递给Host Controller，其中读写**主要由CMD17和CMD18** ，以及CMD24和CMD25。在完成每一次BUS层的处理之后，都要向BUS层发送一个 BUSRequest Handle Complete事件，通知BUS层读写操作已经完成。读写操作需要用到DMA操作，这里需要COPY动作，因为DMA需要物理地址，而BUS层传下来的BUF 是虚拟地址。

# 文章之二：【WinCE】SD card技术了解并WINCE下SDHC驱动开发 #

## 了解 SD card  ##

SD 是 Secure Digital Card 卡的简称，直译成汉语就是 “ 安全数字卡 ” ，是由日本松下公司、东芝公司和美国 SANDISK 公司共同开发研制的全新的存储卡产品。 SD 存储卡是一个完全开放的标准（系统），多用于 MP3 、数码摄像机、数码相机、电子图书、 AV 器材等等，尤其是被广泛应用在超薄数码相机上。 SD 卡在外形上同 Multimedia Card 卡保持一致，大小尺寸比 MMC 卡略厚，容量也大很多。并且兼容 MMC 卡接口规范。不由让人们怀疑 SD 卡是 MMC 升级版。另外， SD 卡为 9 引脚，目的是通过把传输方式由串行变成并行，以提高传输速度。它的读写速度比 MMC 卡要快一些，同时，安全性也更高。 SD 卡最大的特点就是通过加密功能，可以保证数据资料的安全保密。它还具备版权保护技术，所采用的版权保护技术是 DVD 中使用的 CPRM 技术（可刻录介质内容保护）。

规格

![SDHC-1.JPG][]  
主要特点：

1. 精巧而且超薄

SD 记忆卡的尺寸只有 24 毫米 x 32 毫米  x 2.1 毫米。作为“桥梁媒体”的重要特征，它精致小巧，方便您在不同设备上使用。兼容 SD 记忆卡的设备可以采用解码器软件来播放音乐、影像短片以及更多其他类型的内容，无需像 CD 播放机或 DVD 播放机那样采用驱动装置。从而使设备的外形更加精巧，同时也赋予了产品设计者发挥自由创意的全新空间。由于消除了播放音乐时的跳音现象，提高了播放的稳定性。

2. 大容量栽体

目前， SD 记忆卡已经具备各种容量可供选择，同时， 2GB 、 4GB 和 8GB 的 SDHC 也出现了。

3. 高速数据传输

为了提供快速响应和容易处理数字内容， SD 记忆卡可以用每秒 10MB 的速率写入和读取数据。当其能够用于远程通信终端，直接下载内容时，记忆卡的高速传送能力将可使存取时间和通信成本降至最低，同时可减轻网络压力。

4. 拥有版权保护功能

先进的数码技术使高保真音乐和其他高质量内容的录制成为现实。日新月异的数码技术，借助因特网，实现了全球范围的信息快速共享。这一进步也带来了对原版内容的大量复制，因此，作为 21 世纪的一种切实可行的记忆载体就必须具备高水平的版权保护技术，这样才能保护大量高质的数码数据。 SD 记忆卡可以自由复制各种数码数据，并采用独特的内置 CPRM 技术保存和转移版权所有的内容，这也是建立一个全新的音乐及其他商业媒体的发布体系的关键所在。

硬件结构

![SDHC-2.JPG][]  
（参看附录中 SD 卡和其他卡的一个对比表）

SDIO 卡

SDIO （输入 / 输出）卡是一种扩展带 SD 卡插孔设备之功能的接口。正在开发**各种** **SDIO 卡，如相机、 Bluetooth  、 GPS 和 802.11b** **等** 。  
![SDHC-3.JPG][]

如果编写以上设备的驱动，当然前提是有一个合格的 SD Host Controller 。如同编写 USB STORAGE/HID 设备的驱动一样，需要 USB HCD 支持。 MX31 的 ADS 支持基于 SDIO 的 LP1070 SDIO WLAN Card （在 Wince 5.0 的 SD 卡驱动模型里，这种驱动称为 client driver ）。

SD\_SDIO\_SPEC.PDF

**SDIO features**

l          Targeted for portable and stationary applications

l          Minimal or no modification to SD Physical bus is required

l          Minimal change to memory driver software

l          Extended physical form factor available for specialized applications

l          Plug and play (PnP) support

l          Multi-function support including multiple I/O and combined I/O and memory

l          Up to 7 I/O functions plus one memory supported on one card.

l          Allows card to interrupt host

l          Initialization Voltage: 2.0 to 3.6V

l          Operational Voltage range: 3.1 to 3.5V

![SDHC-4.JPG][]

![SDHC-5.JPG][]

## WinCE 5.0  下 SD Stack ##

一共可以分为 3 个部分： a bus driver, host controller driver  和  client drivers ，现分别介绍：

1 Bus Driver

顾名思义，总线，连接 client driver 和 host controller driver 之间的一个管理层。这部分代码微软已经写好了，也就是说定义好了 client 和 host 之间的通讯接口。（是不是可以这么说 : 编写 SD WIFI 的程序员可以不用知道是什么 SDHC ，从而达到驱动的跨硬件性）

参考代码：

*D:/WINCE500/PUBLIC/COMMON/OAK/DRIVERS/SDCARD/SDBUSDRIVER/*

2 Host Controller

控制硬件并且通过上述的 BUS driver 来和 client 进行通讯。

参考代码：

*D:/WINCE500/PLATFORM/Mx31/Src/Drivers/Sdhc*

*D:/WINCE500/PUBLIC/COMMON/OAK/CSP/ARM/FREESCALE/Mxarm11/Drivers/Sdhc*

3 Client Driver

通过 BUS driver 和 SD 设备进行通讯。

Windows CE 5.0 中的 SDIO 支持如下：

l          动态插入和拔出

l          DMA 方式  ( 平台相关 )

l          SDIO  中断

l          动态的时钟控制

l          错误恢复

l          唤醒

l          v1.0  多功能和组合设备

l          CE Power Manager 来处理电源管理

l          MMC

下图可以清晰的表达基于 WINCE5.0 的一个 SD STACK 模型：

![SDHC-6.JPG][]

### Bus Driver  ###

主要功能如下：

l          枚举板上的卡，并决定他们的类型（ MMC, SD Memory or SDIO ）

l          配置合适的电流给卡。

l          根据注册表的值加载 clients

l          把总线要求入队列

l          把来自 host controller 的异步通知入队列

l          总线要求完成， SDIO  中断，设备插入 / 拔出

l          出错时重试

参考代码：

*D:/WINCE500/PUBLIC/COMMON/OAK/DRIVERS/SDCARD/SDBUSDRIVER*

### Host Controller Driver  ###

**主要功能：**

l          HCD 通知总线驱动卡的插入和拔出

l          给卡上电， SD 定义了可接受的初时电压范围。

l          在总线驱动何客户端设置完时钟速度后，打开客户端卡的时钟（ 80 个周期）

l          初始，把总线宽度设置成 1 。如果有需要的话（ 4-bit mode ），把总线宽度设成 4bit

l          传输 SD  命令和数据到 / 来自卡上。

l          负责给槽上电，关电。

l          IST  在这里存在

l          （*可选的* ）唤醒支持（插入，拔出， SDIO 中断）

**初始化**

1.          调用 HCD’s ***XXX\_Init***

2.          调用 ***SDHCDAllocateContext*** ()  来分配一段 HC 的上下文

a)          Context  是总线驱动和 HCD 共享的

3.          HCD  使用 ***SDHCDSetXxx*** 宏来填充这个上下文结构

a)          这个步骤是把 HC 向总线驱动描述一下

b)         包括函数指针，支持的电流，最大时钟，槽数目， SDIO 的支持等等。

4.          调用 ***SDHCDRegisterHostController*** ()  来把自己向总线驱动注册一下

5.          当总线驱动准备处理 SD 事件时，它会调用  HCD 的 init  函数 (pContext->***pInitHandler*** )  （见 *SDHCDRegisterHostController\_\_X* 函数）

6.          在初始化里， HCD 还应该完成硬件和资源的初始化（ IST 等）

下面代码抄自 MX31 BSP 中 SDHC 驱动的 SDH\_Init 函数中：

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> DWORD SDH_Init (DWORD dwContext) { // allocate the context &nbsp;status = SDHCDAllocateContext (SDH_SLOTS,&nbsp; &amp;pHostContext); 。。。。。。 &nbsp;&nbsp;&nbsp; //Set a unique name for each host controller &nbsp;&nbsp;&nbsp; if (pController-&gt;ControllerIndex == 1) &nbsp;&nbsp;&nbsp; { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SDHCDSetHCName (pHostContext, TEXT("MXARM11_1")); &nbsp;&nbsp;&nbsp; } &nbsp;&nbsp;&nbsp; else &nbsp;&nbsp;&nbsp; { &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SDHCDSetHCName (pHostContext, TEXT("MXARM11_2")); &nbsp;&nbsp;&nbsp; } // set init handler &nbsp;&nbsp;&nbsp; SDHCDSetControllerInitHandler (pHostContext,SDInitialize);&nbsp; &nbsp;&nbsp;&nbsp; // set deinit handler&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; SDHCDSetControllerDeinitHandler (pHostContext, SDDeinitialize); &nbsp;&nbsp;&nbsp; // set the bus request handler &nbsp;&nbsp;&nbsp; SDHCDSetBusRequestHandler (pHostContext,SDHBusRequestHandler);&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; // set the cancel I/O handler &nbsp;&nbsp;&nbsp; SDHCDSetCancelIOHandler (pHostContext, SDHCancelIoHandler);&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; // set the slot option handler &nbsp;&nbsp;&nbsp; SDHCDSetSlotOptionHandler (pHostContext, SDHSlotOptionHandler); &nbsp;&nbsp;&nbsp; // now register the host controller &nbsp;&nbsp;&nbsp; status = SDHCDRegisterHostController (pHostContext); </td> 
 </tr> 
 </tbody> 
</table>

**Slot Option Handler**

l          总线驱动调用 HCD 的 ***SlotOptionHandler***  ：

n          ***SDHCDSetSlotPower***  – 设置电压

n          ***SDHCDSetSlotInterface***  –  设置时钟和总线宽度

n          ***SDHCDEnableSDIOInterrupts***

n          ***SDHCDAckSDIOInterrupt***

n          ***SDHCDDisableSDIOInterrupts***

l          ***SDHCDGetWriteProtectStatus***  – HCD  必须查看 SD 存储卡是否开启写保护

l          ***SDHCDQueryBlockCapability***  –  返回 HCD 的最大和最小块长度

总线要求

l          总线驱动把总线要求放入队列然后把它们传入 HCD 的 ***BusRequestHandler***  函数

l          HCD 根据要求来做相应的动作 —command/read/write, multi-block,  等 .

l          HCD  使用某种方式（ DMA, PIO, busy-waiting 等）来发送命令和数据

l          HCD  调用 ***SDHCDIndicateBusRequestComplete*** ()  来通知总线驱动完成

l          总线驱动把完成事件入队列并提交下一个要求给 HCD

l          总线驱动的调度线程将会通知产生要求的起始源事件完成了。

标准的 WINCE SDHC 驱动支持

l          Standard Host Controller v1.0

n          Tokyo  Electron Devices – Ellen

n          Toshiba - Pegasus

n          TI PCI 7x21

n          Ricoh R5C811 and R5C841

l          Non-standard hosts

n          Intel PXA-27x SOC (Mainstone II)

n          Samsung SMDK-2410

n          Freescale MX series

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> 关于 Standard Host Controller SDA Host Working Group (MSFT executive member) Defined Standard Host Register Specification to standardize the hardware interface from bus to controller Currently ratified to v1.0 by SDA executive committee MSFT strongly advocating this standard to all IHVs, ODMs, OEMs and Silicons </td> 
 </tr> 
 </tbody> 
</table>

中断

l          HCD 包括 IST

l          IST  决定哪个槽中断

l          IST evaluates interrupt

比如现在拔出 SD 卡

IST  会调用 Bus Driver’s SDHCIndicateSlotStateChange() with DeviceEjected parameter

l          Bus Driver calls client’s SlotEventCallBack routine with SDCardEjected.  (Provides async notification about changes in the slot state.)

l          Client performs its deinitialization

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> 如何让镜像支持 SD STACK SYSGEN_SDBUS – SD bus driver (sdbus.dll) SYSGEN_SDHC_STANDARD – Standard host controller (sdhc.dll) SYSGEN_SD_MEMORY – SD Memory client (sdmemory.dll) SYSGEN_BTH or SYSGEN_BTH_SDIO_ONLY – SDIO Bluetooth client (bthsdio.dll) BSP variables will be added for CSP-specific host controllers </td> 
 </tr> 
 </tbody> 
</table>

### Client Driver  ###

目前， WINCE5.0 所支持的 client driver 如下：

l          SD Memory Class

l          SDIO Bluetooth Class - Type A

l          SDIO WiFi (vendor specific)

如果需要自己写 client 驱动的话可以参考 ***D:/WINCE500/PUBLIC/COMMON/OAK/DRIVERS/SDCARD/SDCLIENTDRIVER*** *S* 目录下的微软自带的 SD client 驱动来写。

**【 example1: SD MEMORY DRIVER UNDER WINCE 5.0** **】**

Wince 自带的 SD 存储卡 client 驱动，代码路径为：

*D:/WINCE500/PUBLIC/COMMON/OAK/DRIVERS/SDCARD/SDCLIENTDRIVERS/SDMEMORY*

一个 SD 存储卡在 WINCE 里的驱动架构如下图所示：  
\[图无法插入\]

**1** **注册表和启动**

在注册表里告诉 Storage Manager

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> [HKEY_LOCAL_MACHINE/System/StorageManager/Profiles/SDMemory] &nbsp;&nbsp;&nbsp; "Name"="SD Memory Card" &nbsp;&nbsp;&nbsp; "Folder"="Storage Card" &nbsp;&nbsp;&nbsp; ;"PartitionDriver"=""&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ; removable storage cannot have partitions &nbsp; [HKEY_LOCAL_MACHINE/System/StorageManager/Profiles/MMC] &nbsp;&nbsp;&nbsp; "Name"="MMC Card" &nbsp;&nbsp;&nbsp; "Folder"="Storage Card" &nbsp;&nbsp;&nbsp; ;"PartitionDriver"=""&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ; removable storage cannot have partitions &nbsp; ; SD Memory Storage class driver [HKEY_LOCAL_MACHINE/Drivers/SDCARD/ClientDrivers/Class/SDMemory_Class] &nbsp;&nbsp; "Dll"="SDMemory.dll " &nbsp;&nbsp; "Prefix"="DSK " &nbsp;&nbsp; "BlockTransferSize"=dword:40&nbsp; ; send no more than 64 blocks of data per bus transfer &nbsp;&nbsp; ;"SingleBlockWrites"=dword:1&nbsp; ; alternatively force the driver to use single block access &nbsp;&nbsp; ;"IdleTimeout"=dword:7D0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ; 2000 milliseconds &nbsp;&nbsp; ;"IdlePowerState"=dword:2&nbsp;&nbsp;&nbsp;&nbsp; ; 0 == D0, 1 == D1, etc. &nbsp;&nbsp; ;"DisablePowerManagement"=""&nbsp; ; if value present, then disable (remove value to enable) &nbsp; &nbsp;&nbsp; "Profile"="SDMemory" &nbsp;&nbsp; "IClass"=multi_sz:"{A4E7EDDA-E575-4252-9D6B-4195D48BB865}", &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "{A32942B7-920C-486b-B0E6-92A702A99B35}" &nbsp; ; MMC Storage Class Driver [HKEY_LOCAL_MACHINE/Drivers/SDCARD/ClientDrivers/Class/MMC_Class] &nbsp;&nbsp; "Dll"="SDMemory.dll " &nbsp;&nbsp; "Prefix"="DSK " &nbsp;&nbsp; "BlockTransferSize"=dword:40&nbsp; ; send no more than 64 blocks of data per bus transfer &nbsp;&nbsp; ;"SingleBlockWrites"=dword:1&nbsp; ; alternatively force the driver to use single block access &nbsp;&nbsp; ;"IdleTimeout"=dword:7D0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ; milliseconds &nbsp;&nbsp; ;"IdlePowerState"=dword:2&nbsp;&nbsp;&nbsp;&nbsp; ; 0 == D0, 1 == D1, etc. &nbsp; &nbsp;;"DisablePowerManagement"=""&nbsp; ; if value present, then disable (remove value to enable) &nbsp; &nbsp;&nbsp; "Profile"="MMC" &nbsp;&nbsp; "IClass"=multi_sz:"{A4E7EDDA-E575-4252-9D6B-4195D48BB865}", &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "{A32942B7-920C-486b-B0E6-92A702A99B35}" </td> 
 </tr> 
 </tbody> 
</table>

**2 SD** **命令和总线要求**

将所有磁盘的操作转换成 SD 的命令和总线要求

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> NAME SDMEMORY.DLL &nbsp; EXPORTS DSK_Close=SMC_Close DSK_Deinit=SMC_Deinit DSK_Init=SMC_Init DSK_IOControl=SMC_IOControl DSK_Open=SMC_Open DSK_PowerDown=SMC_PowerDown DSK_PowerUp=SMC_PowerUp DSK_Read=SMC_Read DSK_Seek=SMC_Seek DSK_Write=SMC_Write </td> 
 </tr> 
 </tbody> 
</table>

下面为具体的 DISK I/O 操作函数和 CARD I/O 操作函数，详细实现见 sdmemdiskio.cpp 和 sdmemcardio.cpp ：

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> // // SDDiskIO // //&nbsp; SDMemCardConfig&nbsp;&nbsp;&nbsp; - Initialise the memcard structure and card itself DWORD SDMemCardConfig( PSD_MEMCARD_INFO pMemCard ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemRead&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;- Read data from card into pSG scatter gather buffers DWORD SDMemRead( PSD_MEMCARD_INFO pMemCard, PSG_REQ pSG ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemWrite&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; - Write data to card from pSG scatter gather buffers DWORD SDMemWrite( PSD_MEMCARD_INFO pMemCard, PSG_REQ pSG ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemErase&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; - Erase a contiguous set of blocks DWORD SDMemErase( PSD_MEMCARD_INFO pMemCard, PDELETE_SECTOR_INFO pDSI ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemEraseAll&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; - Erase all blocks DWORD SDMemEraseAll( PSD_MEMCARD_INFO pMemCard ); &nbsp; // // SDCardIO // &nbsp; &nbsp;&nbsp; &nbsp;//&nbsp; SDMemDoBusRequest&nbsp; - Perform a bus request, returns Windows Status DWORD SDMemDoBusRequest( PSD_MEMCARD_INFO&nbsp; pMemcard, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UCHAR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Command, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DWORD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Argument, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SD_TRANSFER_CLASS TransferClass, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SD_RESPONSE_TYPE&nbsp; ResponseType, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ULONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NumBlocks, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ULONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; BlockSize, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PUCHAR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pBuffer, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DWORD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Flags); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemSetBlockLen&nbsp;&nbsp; - Sets read/write block length for SD memory card DWORD SDMemSetBlockLen( PSD_MEMCARD_INFO pMemcard, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DWORD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; BlockLen ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemReadMultiple&nbsp; - Read multiple 512 byte blocks of data from card DWORD SDMemReadMultiple( PSD_MEMCARD_INFO pHandle, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ULONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; StartBlock, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ULONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NumBlocks, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PUCHAR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pBuffer ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemWriteMultiple - Write multiple 512 byte blocks of data to card DWORD SDMemWriteMultiple( PSD_MEMCARD_INFO pHandle, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; StartBlock, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NumBlocks, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PUCHAR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pBuffer ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemWriteUsingSingleBlocks - Write using single block writes DWORD SDMemWriteUsingSingleBlocks( PSD_MEMCARD_INFO pHandle, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; StartBlock, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NumBlocks, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PUCHAR&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pBuffer ); &nbsp; &nbsp;&nbsp;&nbsp; //&nbsp; SDMemDoErase - Erase a contiguous set of blocks DWORD SDMemDoErase( PSD_MEMCARD_INFO pHandle, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; StartBlock, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LONG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NumBlocks ); &nbsp; DWORD SDAPIStatusToErrorCode( SD_API_STATUS Status ); &nbsp; DWORD SDGetCardStatus(PSD_MEMCARD_INFO pMemCard , SD_CARD_STATUS *pCardStatus); &nbsp; VOID HandleIoctlPowerSet(PSD_MEMCARD_INFO&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pMemCard, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PCEDEVICE_POWER_STATE&nbsp; pDevicePowerState); VOID InitializePowerManagement(PSD_MEMCARD_INFO pMemCard); VOID DeinitializePowerManagement(PSD_MEMCARD_INFO pMemCard); SD_API_STATUS IssueCardSelectDeSelect(PSD_MEMCARD_INFO pMemCard, BOOL Select); VOID RequestEnd(PSD_MEMCARD_INFO pMemCard); &nbsp; SD_API_STATUS RequestPrologue(PSD_MEMCARD_INFO pMemCard, DWORD DeviceIoControl); </td> 
 </tr> 
 </tbody> 
</table>

##  ##

## SD on MX31 ADS   ##

### Secure Digital Host Controller  ###

The Secure Digital Host Controller (SDHC)  模块支持 MMC ， SD 和 Secure Digital I/O and Combo Cards (SDIO) 三种。 MX31 一共有 2 个 SDHC 硬件模块。一个 host controller  只支持连接上的一个卡。

<table style="border-collapse: collapse;"> 
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 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> SDHC.DLL 由以下源代码组成 『―――― 微软代码 &nbsp; &nbsp;&nbsp;c:/macallan/private/winceos/coreos/ceosutil/utiltree.cxx &nbsp;&nbsp;&nbsp; c:/macallan/public/common/sdk/inc/svsutil.hxx &nbsp;&nbsp;&nbsp; c:/macallan/private/winceos/coreos/ceosutil/utilmemf.cxx &nbsp;&nbsp;&nbsp; c:/macallan/public/common/sdk/inc/svsutil.hxx &nbsp;&nbsp;&nbsp; c:/macallan/private/winceos/coreos/ceosutil/utilmem.cxx &nbsp;&nbsp;&nbsp; c:/macallan/private/winceos/coreos/ceosutil/svsutil.cxx &nbsp;&nbsp;&nbsp; c:/macallan/public/common/oak/drivers/sdcard/sdcardlib/sdcardapistubs.cpp &nbsp;&nbsp;&nbsp; c:/macallan/public/common/oak/drivers/sdcard/sdcardlib/sddebug.cpp &nbsp;&nbsp;&nbsp; c:/macallan/public/common/oak/drivers/sdcard/sdcardlib/sdmemapi.cpp &nbsp;&nbsp;&nbsp; c:/macallan/public/common/oak/inc/block_allocator.hxx c:/macallan/public/common/oak/drivers/sdcard/sdhclib/sdhclib.cpp ―――――』 d:/wince500/platform/mx31/src/drivers/sdhc/bspsdhc.c &nbsp;&nbsp;&nbsp; d:/wince500/public/common/oak/csp/arm/freescale/mxarm11/drivers/sdhc/main.cpp &nbsp;&nbsp;&nbsp; d:/wince500/public/common/oak/csp/arm/freescale/mxarm11/drivers/sdhc/sdcontrol.cpp d:/wince500/public/common/sdk/inc/kfuncs.h &nbsp; </td> 
 </tr> 
 </tbody> 
</table>

SDHC的注册表设置

<table style="border-collapse: collapse;"> 
 <tbody> 
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 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> #if (defined BSP_SDHC1 || defined BSP_SDHC2) [HKEY_LOCAL_MACHINE/Drivers/SDCARD/ClientDrivers/Class/SDMemory_Class] "BlockTransferSize"=dword:100 ; Overwrite from default 64 blocks. ; "SingleBlockWrites"=dword:1 ; alternatively force the driver to use single block access [HKEY_LOCAL_MACHINE/Drivers/SDCARD/ClientDrivers/Class/MMC_Class] "BlockTransferSize"=dword:100 ; Overwrite from default 64 blocks. ; "SingleBlockWrites"=dword:1 ; alternatively force the driver to use single block access [HKEY_LOCAL_MACHINE/System/StorageManager/Profiles/MMC] "Name"="MMC Card" "Folder"="MMC" [HKEY_LOCAL_MACHINE/System/StorageManager/Profiles/SDMemory] "Name"="SD Memory Card" "Folder"="SD Memory" #endif IF BSP_SDHC1 [HKEY_LOCAL_MACHINE/Drivers/BuiltIn/SDHC_ARM11_1] "Order"=dword:21 "Dll"="sdhc.dll" "Prefix"="SDH" "ControllerISTPriority"=dword:64 "Index"=dword:1 ENDIF ;BSP_SDHC1 IF BSP_SDHC2 [HKEY_LOCAL_MACHINE/Drivers/BuiltIn/SDHC_ARM11_2] "Order"=dword:21 "Dll"="sdhc.dll" "Prefix"="SDH" "ControllerISTPriority"=dword:64 "Index"=dword:2 ENDIF ;BSP_SDHC </td> 
 </tr> 
 </tbody> 
</table>

SDHC和DMA

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> SDHC 驱动支持 DMA 和非 DMA 2 种数据传输模式，默认是 DMA 。 For every request submitted to it, the driver attempts to build a DMA Scatter Gather Buffer Descriptor list for the buffer passed to it by the upper layer. For cases where this list cannot be built, the driver falls back to the non-DMA mode of transfer. The default configuration is maintained in the file bsp_cfg.h using the parameters BSP_SDMA_SUPPORT_SDHC1 and BSP_SDMA_SUPPORT_SDHC2. A value of TRUE means DMA is the default mode, and for cases where DMA cannot be used, the driver falls back to a non-DMA mode. A value of FALSE means non-DMA mode is the default and DMA mode will not be attempted. For the driver to attempt to build the Scatter Gather DMA Buffer Descriptors, the upper layer should ensure that the buffer meets the following criteria. • Start of the buffer should be a word aligned address. • Number of bytes to transfer should be word aligned. Due to cache coherency issues arising due to processor and SDMA access of the memory, the above criteria is further stringent for the read or receive operation (it is not applicable for write or transmit): • Start of the buffer should be a cache line size (32 bytes) aligned address. • Number of bytes to transfer should be cache line size (32 bytes) aligned. </td> 
 </tr> 
 </tbody> 
</table>

电源管理

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> The primary methods for limiting power in SDHC module is to gate off all clocks to the controllers and to cut off power to the card slot when no cards are inserted. When a card is inserted to any of the slots, that slot alone is powered and the clocks to that controller alone are gated on. While using memory cards, the clock to the host controller and the clock to memory cards are gated off when ever the controller is idle. For SDIO cards, both the clocks stay on all the time. SDHC driver supports the full power on and full power off states. In full power off state, the clocks to the controllers and the power to the inserted cards are turned off. When powered on, all cards inserted before and after the power down will be detected and mounted. PowerUp This function is implemented to support resuming a memory card operation that was previously terminated by calling PowerDown() API. Power to the card is restored, clocks to the pertaining controller is restarted. SDHC driver is notified of a device status change. This results in signaling the SD bus driver of a card removal followed by a card insertion. The card is re-initialized and is mounted so that the all operations scheduled during a power down resumes. SDIO cards will be initialized on resume. The details of this architecture and its operation can be found in the Platform Builder Help under the heading “Power On and Off Notifications for Secure Digital Card Drivers”, or in the online Microsoft documentation at the following URL: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceddk5/html/wce50conpoweronoffnot ificationsforsecuredigitalcarddrivers.asp Note that this function is intended to be called only by the Power Manager. PowerDown This function has been implemented to support suspending all currently active SD operations just before the entire system enters the low power state. Note that this function is intended to be called only by the Power Manager. This function gates off all clocks to the controllers and powers down all the card slots. </td> 
 </tr> 
 </tbody> 
</table>

### LP1070 Secure Digital I/O Wi-Fi Driver  ###

SDIO Wi-Fi  驱动是通过 Freescale LP1070 SDIO Wi-Fi  卡来连接到一个 IEEE 802.11b/g  无限局域网 (WLAN)  。驱动支持以 54 Mbps 的速率和 WLAN 通讯。

<table style="border-collapse: collapse;"> 
 <tbody> 
 <tr> 
 <td style="padding: 0cm 5.4pt; width: 426.1pt; background-color: transparent; border: 1pt solid windowtext;"> [HKEY_LOCAL_MACHINE/Drivers/SDCARD/ClientDrivers/Custom/MANF-0325-CARDID-0217-FUNC-1] "Instance0"="FSL1070NdisSD:FSL1070NdisSD1" "Prefix"="NDL" "Dll"="FSL1070NdisSD.dll" [HKEY_LOCAL_MACHINE/Comm/FSL1070NdisSD] "ImagePath"="FSL1070NdisSD.dll" "Group"="NDIS" "DisplayName"="WaveBlaster 802.11 SDIO Adapter" [HKEY_LOCAL_MACHINE/Comm/FSL1070NdisSD/Linkage] "Route"=hex(7):/ 46,53,4c,31,30,37,30,4e,64,69,73,53,44,31,00,00,00,00 [HKEY_LOCAL_MACHINE/Comm/FSL1070NdisSD1] "ImagePath"="FSL1070NdisSD.dll" "Group"="NDIS" "DisplayName"="WaveBlaster 802.11 SDIO Adapter" [HKEY_LOCAL_MACHINE/Comm/FSL1070NdisSD1/Parms] "SDIOMaxClockFreq"=dword:017d7840 "SDIOMaxByteNumber"=dword:000003e8 "SDIOMaxBlockNumber"=dword:000003e8 "SDIOBlockSize"=dword:00000040 "SDIOSupportBlockMode"=dword:00000001 "SDIOSupport4BitMode"=dword:00000001 "BluetoothCoexCapability"=dword:00000000 "CcxCapability"=dword:00000000 "RadioMeasurementCapability"=dword:00000000 "MultiDomainCapability"=dword:00000000 "RoamRssiHysteresis80211bg"=dword:0000000a "RoamRssiThreshold80211bg"=dword:ffffff9d "ListenInterval"=dword:00000000 "BufferConfig"=dword:00000000 "DbgMaxFileSize"=dword:00019000 "WMMEnabled"=dword:00000000 "ResetEnable"=dword:00000001 "UWASensitivityLockout"=dword:00000000 "ShortPreamble"=dword:00000001 "RTSCTSThreshold"=dword:0000092b/ "FragmentThreshold"=dword:0000092a "DefaultKey3"="0x0000000000" "DefaultKey2"="0x0000000000" "DefaultKey1"="0x0000000000" "DefaultKey0"="0x0000000000" "LongKeys"=dword:00000000 "Auth"=dword:00000000 "WEP"=dword:00000000 "PowerSaving"=dword:00000000 "RateSelect"=dword:00000000 "MACID"="0x000000000000" "IbssChannel"=dword:00000000 "Ibss54g"=dword:00000000 "RestrictedChannel"=dword:00000000 "BSSID"="0x000000000000" "Manual"=dword:00000000 "ESSID"="" "Domain"=dword:00000010 "ProtocolType"=dword:00000003 "NetworkType"=dword:00000000 "STAuwa"="uwa_airoha.bin" "STAupper"="mac_airoha_STA.bin" "NetworkAddress"="" "BusType"=dword:00000000 "BusNumber"=dword:00000000 [HKEY_LOCAL_MACHINE/Comm/FSL1070NdisSD1/Parms/Tcpip] "Subnetmask"=hex(7):/ 32,35,35,2e,32,35,35,2e,32,35,35,2e,30,00,00,00,00 "IpAddress"=hex(7):/ 30,2e,30,2e,30,2e,30,00,00,00,00 "UseZeroBroadcast"=dword:00000000 "EnableDHCP"=dword:00000001 </td> 
 </tr> 
 </tbody> 
</table>

## SD on EVT   ##

目前在 EVT 板上，对于 SD 的代码更改如下：

## 附录  ##

SD 卡与其他卡的对比

![SDHC-7.JPG][]

SDHC

![SDHC-8.JPG][]

<table style="width: 100%;"> 
 <tbody> 
 <tr> 
 <td style="background-color: transparent; border: medium none #ece9d8; padding: 7.5pt;"> Compatibility </td> 
 </tr> 
 <tr> 
 <td style="background-color: transparent; border: medium none #ece9d8; padding: 7.5pt;"> <img src="http://images.cnblogs.com/cnblogs_com/songtitan/SDHC-9.JPG" alt="" width="278" height="144"> &nbsp; &nbsp; * SDHC Host Products can use both SD and SDHC Memory Cards. * SD Host Products can use only SD Memory Card 2GB or less. </td> 
 </tr> 
 </tbody> 
</table>

<table style="width: 100%;"> 
 <tbody> 
 <tr> 
 <td style="background-color: transparent; border: medium none #ece9d8; padding: 7.5pt;"> Capacity (4GB SDHC Memory Card) 
 <table style="width: 100%;"> 
 <tbody> 
 <tr> 
 <td style="background: none repeat scroll 0% 0% #999999; border: medium none #ece9d8; padding: 0cm;"> 
 <table style="width: 100%;"> 
 <tbody> 
 <tr> 
 <td style="background: none repeat scroll 0% 0% #e6e6e6; border: medium none #ffffff; padding: 3.75pt;"> Still image JPEG 1,880 x 2,160 pixels, 6 Megapixels </td> 
 <td style="background: none repeat scroll 0% 0% white; border: medium none #ffffff; padding: 3.75pt;"> Approx. 1,240 images </td> 
 </tr> 
 <tr> 
 <td style="background: none repeat scroll 0% 0% #e6e6e6; border: medium none #ffffff; padding: 3.75pt;"> MPEG-2 Video 704 x 480 pixels, 5 Mbps, 30 fps </td> 
 <td style="background: none repeat scroll 0% 0% white; border: medium none #ffffff; padding: 3.75pt;"> Approx. 1 hr 40 min </td> 
 </tr> 
 <tr> 
 <td style="background: none repeat scroll 0% 0% #e6e6e6; border: medium none #ffffff; padding: 3.75pt;"> MPEG-4 Video QVGA (320 x 240 pixels), 384 kbps, 15 fps </td> 
 <td style="background: none repeat scroll 0% 0% white; border: medium none #ffffff; padding: 3.75pt;"> Approx. 19 hrs </td> 
 </tr> 
 <tr> 
 <td style="background: none repeat scroll 0% 0% #e6e6e6; border: medium none #ffffff; padding: 3.75pt;"> Music (SD-Audio/AAC) 128 kbps </td> 
 <td style="background: none repeat scroll 0% 0% white; border: medium none #ffffff; padding: 3.75pt;"> Approx. 68 hrs (About 1,000 songs) </td> 
 </tr> 
 </tbody> 
 </table> &nbsp; </td> 
 </tr> 
 </tbody> 
 </table> &nbsp; </td> 
 </tr> 
 </tbody> 
</table>

常用网站：

[http://www.sdcard.com/][http_www.sdcard.com]

[http://www.sdcard.org/][http_www.sdcard.org]

# 文章之三： 获取SD卡容量 #

# **常用代码 段: 从block设备 中读取扇区大小，扇区数，和总容量等。** #

1.  void GetStorageInfo()
2.  \{
3.                  DISK\_INFO  m\_devinfo;
4.          BOOL  buf=1;
5.          unsigned long BytesReturned;
6.  //这里DSK1：的名字要根据具体你的块设备index来的，sd卡 的index一般不定死，但你可以用注册表 工具 从Active下面找到被加载 的所有block设备，你可以知道哪个DSK是哪个存储设备。5楼更新了具体的方法。
7.          HANDLE        h\_nfd = CreateFile( L"DSK1:",
8.                  GENERIC\_READ,
9.                  0,
10.                 NULL,
11.                 OPEN\_EXISTING,
12.                 0,
13.                 NULL);
14. 
15.         if(h\_nfd==NULL)
16.                 ::MessageBox ( NULL, L"ERRO in createfile", L"ERROR", 0);
17.        
18.         if ( FALSE == DeviceIoControl(
19.                 h\_nfd,
20.                 IOCTL\_DISK\_GETINFO,
21.                 NULL,
22.                 0,
23.                 &m\_devinfo
24.                 sizeof(m\_devinfo),
25.                 &BytesReturned,
26.                 NULL
27.                 )) \{
28.                 ::MessageBox ( NULL, L"DISK\_IOCTL\_GETINFO", L"ERROR", 0);
29.                 return ;
30.         \}
31.         CString tmp;
32.         tmp.Format(L"di\_bytes\_per\_sect=%d di\_total\_sectors =%d Total Captal=%d/r/n",inbuf.di\_bytes\_per\_sect,inbuf.di\_total\_sectors,di\_total\_sectors\*di\_bytes\_per\_sect );
33.         ::MessageBox ( NULL, tmp, L"ERROR", 0);
34.        
35.         CloseHandle(h\_nfd);       
36. \}

# 当然，类似的还可以获得SD卡ID号    #

[SDSPEC]: http://files.cnblogs.com/nesta/SDSPEC.pdf
[SDJiaGou.JPG]: /images/20220709/c469b3d3ad1f4b24b25c87baeac31189.png
[SDHC-1.JPG]: /images/20220709/0a27dc16e0d34ae08450dbaca5bb94cc.png
[SDHC-2.JPG]: /images/20220709/504152586e8f48f39a4dbd0343dbc875.png
[SDHC-3.JPG]: /images/20220709/e1e5ea1bdcd048cfb39ff9b356d091c1.png
[SDHC-4.JPG]: /images/20220709/200c0f2f8d4944bca9b75db94b6f07df.png
[SDHC-5.JPG]: /images/20220709/0fff05cad3d443c5ba825b499ef21183.png
[SDHC-6.JPG]: /images/20220709/67d61c7c875345c4bf4c0aa2db8d8b8a.png
[SDHC-7.JPG]: /images/20220709/bc327ddde5704e51b88661537bcb974c.png
[SDHC-8.JPG]: /images/20220709/ed0d23b71df549e2b281cdc22d6378da.png
[http_www.sdcard.com]: http://www.sdcard.com/
[http_www.sdcard.org]: http://www.sdcard.org/