SDHC data read out and winhex read out is not the same....

斑点大象 — Mon, 07 Sep 2015 15:03:41 GMT

My English is not very good, most of the following to use Google translate. Also please forgive ...

MCU is MK30DN512Z, finished sdhc underlying driver test no problem, test data is written to N sectors, then read out the same data.

Plus the ZNFAT, found not detected by sector 0. So stepping discovered buffer data inside is not the same with the check data. Then print out the 0 sector, find the difference. Open winhex looked, I had written into the data is not right, but the microcontroller to read out what I write into the data - the sector should be no problem for a sector write 0, becomes all 0s, write to other I figure it will ......

0 WINhex sector data

0 sector, SDHC data read out (with% x type printing)

If I end at 500 in mcu sector write (rearward other sectors also tried the same results) 17 on winhex should see is the one pair Okay, okay, Figure

I write to 499 decimal sectors 35, winhex should show 0x23

500 sector write decimal 17, winhex should show 0x11

0-255 write cycle of 501 sectors

Serial data print out properly

winhex read out data as follows

Summary found that the display is written 01 02

Write 02 Display 01

Write 03 Display 03

Write 05 Display 0A

Write 0A display ........... 05

Sector read and write functions as follows

//SD card read a block

//Enter:u32 sector Take Address

// u8 *buffer Data storage address（Size is at least 512byte）

//return value:0： Success

// other：Failure

u8 SD_ReadSingleBlock(u32 sector, u8 *buffer)

{

u32 rev[4];

u16 results;

u32 j;

u32 *ptr = (u32*)buffer;

// if(MySD_Reg.CARDTYPE==ESDHC_CARD_SD) //If an ordinary SD card to the block address into a byte address

// {

// sector = sector<<9;

// }

sector = sector + 8192;

while (SDHC->PRSSTAT & SDHC_PRSSTAT_DLA_MASK){};//DATA line is idle wait

SDHC->BLKATTR &= (~ SDHC_BLKATTR_BLKCNT_MASK); //Clear blocks

SDHC->BLKATTR |= SDHC_BLKATTR_BLKCNT(1);

results=SD_SendCommand(ESDHC_CMD17,sector,rev); //Send read a single block command

if(results!=ESDHC_OK) return ESDHC_ERROR_DATA_TRANSFER;

//Start reading a sector------------------------------

//When reading data, each read 4 bytes

for (j = (512+3)>>2;j!= 0;j--)

{

if (SDHC->IRQSTAT & ( SDHC_IRQSTAT_DEBE_MASK //Data End Bit Error

| SDHC_IRQSTAT_DCE_MASK //Data CRC Error

| SDHC_IRQSTAT_DTOE_MASK)) //DataTimeout Error

{

SDHC->IRQSTAT |= SDHC_IRQSTAT_DEBE_MASK

| SDHC_IRQSTAT_DCE_MASK

| SDHC_IRQSTAT_DTOE_MASK

| SDHC_IRQSTAT_BRR_MASK; //Buffer Read Ready

return ESDHC_ERROR_DATA_TRANSFER;

}

while (0 == (SDHC->PRSSTAT & SDHC_PRSSTAT_BREN_MASK)){}; // //Wait for data ready

*ptr=SDHC->DATPORT; *ptr++;

}

return ESDHC_OK;

}

//Writes a block to SD card

//Enter:u32 sector Sector address

// u8 *buffer Data storage address

//return value:0： Success

// other ：Failure

u8 SD_WriteSingleBlock(u32 sector, const u8 *buffer)

{

u32 rev[4];

u16 results;

u32 j;

u32 *ptr = (u32*)buffer;

// if(MySD_Reg.CARDTYPE==ESDHC_CARD_SD) //If an ordinary SD card to the block address into a byte address

// {

// sector = sector<<9;

// }

sector = sector + 8192;

while (SDHC->PRSSTAT & SDHC_PRSSTAT_DLA_MASK){};//DATA line is idle wait

SDHC->BLKATTR &= (~ SDHC_BLKATTR_BLKCNT_MASK); //Clear blocks

SDHC->BLKATTR |= SDHC_BLKATTR_BLKCNT(1);

results=SD_SendCommand(ESDHC_CMD24,sector,rev);

if(results!=ESDHC_OK) return ESDHC_ERROR_DATA_TRANSFER;

//Begins writing a sector------------------------------

//When reading data, each read 4 bytes

for (j = (512)>>2;j!= 0;j--)

{

if (SDHC->IRQSTAT & ( SDHC_IRQSTAT_DEBE_MASK //Data End Bit Error

| SDHC_IRQSTAT_DCE_MASK //Data CRC Error

| SDHC_IRQSTAT_DTOE_MASK)) //DataTimeout Error

{

SDHC->IRQSTAT |= SDHC_IRQSTAT_DEBE_MASK

| SDHC_IRQSTAT_DCE_MASK

| SDHC_IRQSTAT_DTOE_MASK

| SDHC_IRQSTAT_BWR_MASK; //Buffer Write Ready

return ESDHC_ERROR_DATA_TRANSFER;

}

while (0 == (SDHC->PRSSTAT & SDHC_PRSSTAT_BWEN_MASK)){}; //Wait for data ready

SDHC->DATPORT=*ptr; *ptr++;

}

return ESDHC_OK;

}

Regrads!

Thank you very much!!

Re: SDHC data read out and winhex read out is not the same....

斑点大象 — Thu, 10 Sep 2015 11:30:37 GMT

help me please~~~~

Re: SDHC data read out and winhex read out is not the same....

bobpaddock — Thu, 10 Sep 2015 12:30:08 GMT

"SDHC->DATPORT=*ptr; *ptr++; "

That does not look correct to me.

Should it be one of these:

SDHC->DATPORT=*ptr++;

SDHC->DATPORT=*ptr; ptr++

Re: SDHC data read out and winhex read out is not the same....

斑点大象 — Thu, 10 Sep 2015 14:07:25 GMT

Okay, I'll try~~~Thank you ...

Re: SDHC data read out and winhex read out is not the same....

斑点大象 — Thu, 10 Sep 2015 14:26:52 GMT

It does not seem to work, I will continue to look for problems.

Thank you for your help.

Re: SDHC data read out and winhex read out is not the same....

斑点大象 — Sun, 13 Sep 2015 15:17:42 GMT

。。。。Nothing~~~

Re: SDHC data read out and winhex read out is not the same....

斑点大象 — Mon, 14 Sep 2015 08:17:31 GMT

Really a great shame career ah, the end result is actually reversed D0 and D1. God. Schematic difference had many times Leng Shimo find the problem. Do not say, let me cry while ~~

topic Re: SDHC data read out and winhex read out is not the same.... in Kinetis Microcontrollers

SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....

Re: SDHC data read out and winhex read out is not the same....