< Rise CS and MOSI for 80 clocks cycles */ for (i = 0; i <= 9; i++) { /*!< 发送 空 字节数据 0xFF */ SD_WriteByte(SD_DUMMY_BYTE); } if (SD_GoIdleState() == SD_RESPONSE_FAILURE) return SD_RESPONSE_FAILURE; //获取卡的类型,最多尝试10次 i=10; do { SD_GetCardType(...
In this comprehensive guide, we will discuss about read/write cycles of an SD card and signs to look for to know the remaining lifespan of the secure digital card. What is the life expectancy of a memory card? All the storage devices, including an SD card, can get worn out with time ...
So, if you need reliability, take a SLC card despite its higher price, As the wear levelling distributes the wear across the card, bigger cards endure more sector erases than small cards, as they have more sectors. In principle, a 4 GiB card with 100 000 write cycles will be able to ...
The mount error with a return value of -5 is probably occurring at the driver layer, in theusdhc.cdriver. The mount error with a return value of -30 may be due to a corrupted read from the SD card, which is likely an issue at the driver layer resulting from incorrect initialization. ...
data read access time TAAC 8 R [119:112] 1.5msec 00100110b 同上in CLK cycles NSAC 8 R [111:104] 0 00000000b max.data transfer rate TRAN_SPEEN 8 R [103:96] 25MHz 00110010b card command classes CCC 12 R [95:84] ALL 1F5h max.read data block length READ_BL_LEN 4 R [83:80...
SD_WriteByte(SD_DUMMY_BYTE); } //获取卡的类型,最多尝试10次 i=0; do { /*---Put SD in SPI mode---*/ /*!< SD initialized and set to SPI mode properly */ SD_GoIdleState(); /*Get card type*/ SD_GetCardType(); }while(SD...
1、51单片机读写SD卡(命令解释)如下:SD卡命令共分为 12类,分别为classO到classll不同的SDd卡,主控根据其功能,支持不同的命令集ClassO :(卡的识别、初始化等基本命令集 )CMDO:复位SD卡.CMD1:读OCR寄存器.CMD9:读CSD寄存器.CMD10:读CID寄存器.CMD12 :停止读多块时的数据传输CMD13:读 Card_Status 寄存器Clas...
return SD_GetCardInfo(&SDCardInfo); } 2. 但数据块测试 void SD_SingleBlockTest(void) { /*--- Block Read/Write ---*/ /* Fill the buffer to send */ Fill_Buffer(Buffer_Block_Tx, BLOCK_SIZE, 0x320F); if (Status == SD_RESPONSE_NO_ERROR) { /* Write block ...
SD卡官方规格书
7、指令后,将写1个block长度 的数据到自变量设定的地址.(block长度由 指令CMD16设 定).31:0 data addressR125WRITE_MULTIPLE_ BLOCK接到本指令后,将 连续写block长度 的数据到自变量 设定的地址,直到 接到指令CMD12 为止.(block长度 由指令CMD16设 定).31:0 data addressR158READ_OCR接到本指令 后,Card将...