sdmmc eMMC Decode CID properly

JohnU — Mon, 03 Jul 2017 09:13:16 GMT

Hi,

Patch proposal for SDK 2.2.0 (LPCXpresso54608):

Date:   Fri Jun 30 13:37:31 2017 +0200

    sdmmc: fix MMC_DecodeCid() according to MMC spec (not SD spec)

    JSED84-B45 and Physical Layer Simplified Specification Version 2.00
    define a little different CID fields structure.

diff --git a/sdmmc/src/fsl_mmc.c b/sdmmc/src/fsl_mmc.c
index e980aa4..770930d 100755
--- a/sdmmc/src/fsl_mmc.c
+++ b/sdmmc/src/fsl_mmc.c
@@ -1497,13 +1497,14 @@ static void MMC_DecodeCid(mmc_card_t *card, uint32_t *rawCid)
     cid->productName[2U] = (uint8_t)((rawCid[2U] & 0xFF0000U) >> 16U);
     cid->productName[3U] = (uint8_t)((rawCid[2U] & 0xFF00U) >> 8U);
     cid->productName[4U] = (uint8_t)((rawCid[2U] & 0xFFU));
+    cid->productName[5U] = (uint8_t)((rawCid[1U] & 0xFF000000U) >> 24U);

-    cid->productVersion = (uint8_t)((rawCid[1U] & 0xFF000000U) >> 24U);
+    cid->productVersion = (uint8_t)((rawCid[1U] & 0xFF0000U) >> 16U);

-    cid->productSerialNumber = (uint32_t)((rawCid[1U] & 0xFFFFFFU) << 8U);
-    cid->productSerialNumber |= (uint32_t)((rawCid[0U] & 0xFF000000U) >> 24U);
+    cid->productSerialNumber = (uint32_t)((rawCid[1U] & 0xFFFFU) << 16U);
+    cid->productSerialNumber |= (uint32_t)((rawCid[0U] & 0xFFFF0000U) >> 16U);

-    cid->manufacturerData = (uint16_t)((rawCid[0U] & 0xFFF00U) >> 8U);
+    cid->manufacturerData = (uint16_t)((rawCid[0U] & 0xFF00U) >> 8U);
}

static status_t MMC_AllSendCid(mmc_card_t *card)

best regards

Re: sdmmc eMMC Decode CID properly

soledad — Tue, 11 Jul 2017 20:22:35 GMT

Hi,

Is this thread related to the below threads?

sdmmc SD_Write()/SD_Read() failed with ATP card

https://community.nxp.com/thread/454708

Regards

Soledad

Re: sdmmc eMMC Decode CID properly

JohnU — Tue, 11 Jul 2017 23:04:27 GMT

Hi,

no, each of the issues is separate.

The patch concerns MMC chip and the links concerns different SD cards (different initialization problems).

Common things are only library name (sdmmc) and SDIF hardware.

best regards

topic Re: sdmmc eMMC Decode CID properly in MCUXpresso SDK

sdmmc eMMC Decode CID properly

Re: sdmmc eMMC Decode CID properly

Re: sdmmc eMMC Decode CID properly