2440支持大容量SD卡的解决办法(转)

来源：互联网发布：linux调整日志级别编辑：程序博客网时间：2024/05/27 20:51

操作方法：

1. 更新PB. 更新补丁放在//10.1.10.250/software/WinCE50 Update/WinCEPB50-071231-Product-Update-Rollup-Armv4I.msi
2. 在platform->setting->environment 中设置IMGSDBUS2 = 1

之所以要设置这个环境变量是因为sdbus2.dll 才支持大容量的SD的。

在common.bib中

#if defined IMGSDBUS2
; @CESYSGEN IF CE_MODULES_SDBUS2
sdbus.dll      $(_FLATRELEASEDIR)/sdbus2.dll                NK SH
; @CESYSGEN ENDIF CE_MODULES_SDBUS2
#else
; @CESYSGEN IF CE_MODULES_SDBUS
sdbus.dll      $(_FLATRELEASEDIR)/sdbus.dll                  NK SH
; @CESYSGEN ENDIF CE_MODULES_SDBUS
#endif
3.      修改BSP下的代码

（1）SendCommand(UINT16 Cmd, UINT32 Arg, UINT16 respType, BOOL bDataTransfer)函数里在case ResponseR6:下面加case ResponseR7:

case ResponseR1:
        case ResponseR1b:
case ResponseR7:    // add by wogo at 2009.05.06添加的地方
            //--- SHORT RESPONSE (48 bits total)---
            // Format: { START_BIT(1) | TRANSMISSION_BIT(1) | COMMAND_INDEX(6) | CARD_STATUS(32) | CRC7(7) | END_BIT(1) }
            // NOTE: START_BIT and TRANSMISSION_BIT = 0, END_BIT = 1
            //
            *(respBuff    ) = (BYTE)(START_BIT | TRANSMISSION_BIT | pRequest->CommandCode);
            *(respBuff + 1) = (BYTE)(vm_pSDIReg->SDIRSP0      );
            *(respBuff + 2) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 8 );
            *(respBuff + 3) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 16);
            *(respBuff + 4) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 24);
            *(respBuff + 5) = (BYTE)(END_RESERVED | END_BIT);
            break;
（2）函数GetCommandResponse(PSD_BUS_REQUEST pRequest)中加在case ResponseR1b:下面

case ResponseR1:
case ResponseR1b:
case ResponseR7: //------------------------添加的地方

            //--- SHORT RESPONSE (48 bits total)---
            // Format: { START_BIT(1) | TRANSMISSION_BIT(1) | COMMAND_INDEX(6) | CARD_STATUS(32) | CRC7(7) | END_BIT(1) }
            // NOTE: START_BIT and TRANSMISSION_BIT = 0, END_BIT = 1
            //
            *(respBuff    ) = (BYTE)(START_BIT | TRANSMISSION_BIT | pRequest->CommandCode);
            *(respBuff + 1) = (BYTE)(vm_pSDIReg->SDIRSP0      );
            *(respBuff + 2) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 8 );
            *(respBuff + 3) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 16);
            *(respBuff + 4) = (BYTE)(vm_pSDIReg->SDIRSP0 >> 24);
            *(respBuff + 5) = (BYTE)(END_RESERVED | END_BIT);
            break;
主要是要添加对cmd7的支持。

然后重新sysgen个工程即可。

==================================完毕！=================================

4. 重新sysgen platform。

补充：对于2410 支持大容量SD问题也是类似如果是4.2BSP就要修改中断申请等问题了。4.2BSP支持大容量的SD卡办法请参考这里

http://topic.csdn.net/u/20080911/16/111A849C-FD1F-4955-840D-6DDFBA8EE1FA.html

http://topic.csdn.net/u/20081104/13/5024B712-07F4-4B33-A015-F2D5BAAFA027.html

http://topic.csdn.net/u/20081021/10/52df6b8b-c69b-4e7b-a278-0816e133f881.html?seed=508798215

http://topic.csdn.net/u/20080916/16/00D9A2BE-E4F8-4BEA-B892-F25E20AC4C83.html

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