Bug in sdmmc middleware (SDK2.8.0)

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Bug in sdmmc middleware (SDK2.8.0)

125 Views
Contributor III

Hi,

I'm using Kinetis K27 connected to a eMMC chip, 8 bits data, VCC=3.3v and VCCQ=1.8v.

After upgrading from SDK 2.7.0 to 2.8.0 the application no longer worked, it stopped in a forever loop in MMC_SendOperationCondition. 

Unless I have misunderstood something, I had to add following code to fix the problem  : 

status_t MMC_CardInit(mmc_card_t *card)

{
assert(card);
assert((card->hostVoltageWindowVCC != kMMC_VoltageWindowNone) &&
(card->hostVoltageWindowVCC != kMMC_VoltageWindow120));
assert(card->hostVoltageWindowVCCQ != kMMC_VoltageWindowNone);

uint32_t opcode = 0U;

//  Bugfix, opcode voltage mask was never set !
switch (card->hostVoltageWindowVCC)
{
   case kMMC_VoltageWindows270to360 : opcode = MMC_OCR_V270TO360_MASK; break;
   case kMMC_VoltageWindow170to195 : opcode = MMC_OCR_V170TO195_MASK; break;
   case kMMC_VoltageWindow120 : break;
   case kMMC_VoltageWindowNone : break;
}

.....

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2 Replies

36 Views
Contributor III

Hi, Sorry for the late reply, i didn't get any notification about your query.

The device is a SanDisk iNAND 7250 supporting up to eMMC 5.1. Kinetis K27F supports eMMC 4.2/4.3 according to the ref manual.

Regards, Eldar

 

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72 Views
NXP TechSupport
NXP TechSupport

Hi

What is your emmc device version you are using?

danielchen_0-1599535127055.png

 

 

Regards

Daniel

 

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