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read函式不会读取eMMC闪存?
发表于 2015-4-28 10:59:10
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本帖最后由 FatDKai 于 2015-4-28 11:56 编辑
在Firefly平台弄了个读/写档案测试的程序用ADB丢进/data/tmp目录执行
执行读取函式时,用分析仪抓取不到任何读eMMC闪存的CMD(17,18), 系统对eMMC闪存不会下读闪存的CMD?
为什么?求解~- int patFile1 = open("./Pattern1.bin",O_CREAT|O_EXCL|O_RDWR,S_IRUSR|S_IWUSR|S_IXUSR);
- if(patFile1 < 0)
- {
- printf("open patFile1 error!\n");
- bError = 1;
- goto OUT;
- }
-
- // lseek(patFile1, 0 , SEEK_SET);
-
- int i;
- unsigned int offset = 0;
- unsigned char* dataPatBuf;
- unsigned char* tmpDataBuf;
- unsigned int fileSecs = MAX_BYTE_OF_FILE / SEC_SIZE;
-
- dataPatBuf = (unsigned char *)malloc(SEC_SIZE);
- printf("File Sectors = %d\n", fileSecs);
-
- srand(seed);
- for(i = 0; i < fileSecs; i++) {
- memset(dataPatBuf, (rand() % SEC_SIZE), SEC_SIZE);
- write(patFile1,dataPatBuf, SEC_SIZE);
- }
- //fsync(patFile1);
-
- lseek(patFile1, 0 , SEEK_SET);
- printf("Read Data Pattern...\n");
- for(i = 0; i < fileSecs; i++)
- read(patFile1,dataPatBuf,SEC_SIZE);
-
- free(dataPatBuf);
-
- close(patFile1);
-
- remove("Pattern1.bin");
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