?? sdcrc.c__.htm
字號:
<html><head><title>SD卡讀寫模塊.rar - sdcrc.c</title></head><body>
<script language="JavaScript">
function openwin(url)
{
window.open(url, 'ProgramSourceCode');
}
</script>
<textarea cols=105 rows=17>文件頭:
/****************************************Copyright (c)**************************************************
** Guangzhou ZLG-MCU Development Co.,LTD.
** graduate school
** http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name: sdtools.c
** Last modified Date: 2005-1-6
** Last Version: V1.0
** Descriptions: sd 卡驅動軟件包: SD卡相關工具函數 ---- CRC校驗
** Soft Packet of SD Card Driver: tool funcitons about sd card ---- crc check
**
**------------------------------------------------------------------------------------------------------
** Created by: Ming Yuan Zheng
** Created date: 2005-1-6
** Version: V1.0
** Descriptions: The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:
</textarea><BR>
<table width=756 border=0>
<tr><td width=1 bgcolor=#B0B0B0></td><td>
<script type="text/javascript"><!--
google_ad_client = "pub-8055710228382273";
google_ad_width = 728;
google_ad_height = 90;
google_ad_format = "728x90_as";
google_ad_type = "text_image";
google_ad_channel ="";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "000000";
google_color_text = "333333";
google_color_url = "666666";
//--></script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
<td width=15 bgcolor=#E4E0D8></td></tr></table>
<textarea cols=105 rows=12>文件尾:
*********************
** 函數名稱: INT8U SD_GetCmdByte6() Name: INT8U SD_GetCmdByte6()
** 功能描述: 獲取SD卡命令的CRC7 Function: get the CRC7 of the command of SD card
** 輸 入: INT8U cmd : 命令 Input: INT8U cmd : command
INT8U *param: 命令的參數,長度為4字節 INT8U *param: the param of command,length is 4 bytes
** 輸 出: CRC7碼 Output: CRC7 code
********************************************************************************************************************/
INT8U SD_GetCmdByte6(INT8U cmd, INT8U *param)
{
INT8U i, j;
INT8U reg = 0;
INT8U array[5];
array[0] = cmd;
for (i = 1; i < 5; i++) /* 將參數的順序重新排列 */
array[i] = param[4 - i];
for (i = 0; i < 5; i++) /* 計算5個字節的CRC7 */
{
for (j = 0; j < 8; j++)
{
reg <<= 1;
reg ^= ((((array[i] << j) ^ reg) & 0x80) ? 0x9 : 0);
}
}
return ((reg << 1) + 0x01) ; /* 計算結果的CRC7左移一位,并將最低位置1 */
}
#endif
</textarea><BR>
<a href=http://www.pudn.com><small><font color=#A0A0A0>程序員聯合開發網</font></small></a> <a href="/downloads28\sourcecode\embed/detail90300.html"><small><font color=#A0A0A0>返回SD卡讀寫模塊.rar</font></small></a>
<a href="javascript:openwin('/view_src.asp?id=90300&f=SD卡讀寫模塊/SD/sdcrc.c');"><small><font color=#A00000>在線閱讀整個文件</font></small></a>
</body></html>?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -