I need to interface a mass storage device (of size 8 GB or more) to STM32F769I. SD/microSD/USB disk do not suit my requirements. Hence, I am looking at eMMC/NAND Flash. Is it possible to interface eMMC to STM32F769I? If Yes, How?

[Raghavan K]

Posted on June 16, 2018 at 19:03

I could not find any app notes on how to interface eMMC to STM32F7 MCUs. Appreciate help from the experts in this forum.

#stm32-emmc #stm32f7-nand #stm32f7-emmc #stm32f769i #stm32f769i-eval

[Tesla DeLorean]

Posted on June 18, 2018 at 12:58

eMMC memory connects like an SD card would, the primary communications pins are the same. The STM32F769I-EVAL board supports two microSD sockets.

One can evaluate eMMC using ODROID adapters and modules. There is a microSD form-factor adapter.

https://www.hardkernel.com/main/products/prdt_info.php?g_code=G135415955758

 

Driver code needs to be modified to recognize and use eMMC based memory. I can consult on that if you need assistance.

[Raghavan K]

Posted on June 18, 2018 at 13:37

Turvey.Clive.002

‌ Thanks for your response. I am looking to use an eMMC of size 8 GB or 16 GB for my image storage requirement. I definitely need assistance on how to access eMMC from STM32F769I-EVAL. I shall contact you soon for this.

[Tesla DeLorean]

Posted on June 18, 2018 at 13:08

Here running a 128GB SAMSUNG eMMC from an STM32F769I-DISCO

15.61 MBps Write, 22.50 MBps Read

Core=216000000, 216 MHz

CPUID 411FC270 DEVID 451 REVID 1000Cortex M7 r1p0STM32F76xxx or F77xxxC0000018 20013910 0000000010110221 12000011 00000040FPU-D Single-precision and Double-precisionHCLK=216000000, 216.00 MHzAPB1= 54000000, 54.00 MHzAPB2=108000000, 108.00 MHzPLL P:216000000 Q:108000000 R: 72000000PLL48CLK 108000000, 108.00 MHzFatFs Testing (68300)SystemCoreClock: 216000000APB1= 54000000APB2=108000000Mounting FatFsBSP_SD_MspInit00200000 2097152 1.00 GB GetCardCSD0E8F6000 116.48 GB 122.14 GB EXTCSDPLL1_P_CK 216000000, 216.00 MHzPLL1_Q_CK 108000000, 108.00 MHzPLL1_R_CK 72000000, 72.00 MHzSDMMC_CK 0, 54.00 MHzHAL_SD_GetCardInfo 244277248 244277248 CardInfo 244277248 512 512READ 0 100000000 : EB 76 90 45 58 46 41 54-20 20 20 00 00 00 00 00 .v.EXFAT .....00000010 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000020 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000030 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000040 : 00 00 00 00 00 00 00 00-00 60 8F 0E 00 00 00 00 .........`......00000050 : 00 08 00 00 00 1E 00 00-00 28 00 00 38 8F 0E 00 .........(..8...00000060 : 04 00 00 00 C2 5E F7 E4-00 01 00 00 09 08 01 80 .....^..........00000070 : 00 00 00 00 00 00 00 00-33 C9 8E D1 BC F0 7B 8E ........3.....{.00000080 : D9 A0 FB 7D B4 7D 8B F0-AC 98 40 74 0C 48 74 0E ...}.}....@t.Ht.00000090 : B4 0E BB 07 00 CD 10 EB-EF A0 FD 7D EB E6 CD 16 ...........}....000000A0 : CD 19 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000000B0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000000C0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000000D0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000000E0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000000F0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000100 : 0D 0A 52 65 6D 6F 76 65-20 64 69 73 6B 73 20 6F ..Remove disks o00000110 : 72 20 6F 74 68 65 72 20-6D 65 64 69 61 2E FF 0D r other media...00000120 : 0A 44 69 73 6B 20 65 72-72 6F 72 FF 0D 0A 50 72 .Disk error...Pr00000130 : 65 73 73 20 61 6E 79 20-6B 65 79 20 74 6F 20 72 ess any key to r00000140 : 65 73 74 61 72 74 0D 0A-00 00 00 00 00 00 00 00 estart..........00000150 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000160 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000170 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000180 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................00000190 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000001A0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................000001B0 : 00 00 00 00 00 00 00 00-00 00 00 00 00 00 FF FF ................000001C0 : FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................000001D0 : FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................000001E0 : FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF ................000001F0 : FF FF FF FF FF FF FF FF-FF FF FF 00 1F 2C 55 AA .............,U.EXFAT 122.1 GB total drive space 232.1 MB available 121.9 GB used---- 32768000 /SPEEDTST.003D--- 0 /TRILO---- 78 /STM32.TXT---- 32768000 /COUNTER.0040E8F6000 116.48 GB 122.14 GB 182CRC32 A534026F Memory Image32768000 Bytes, 453357874 Cycles 15.61 MBps Write (FatFs) 2099 ms run time 15.61 MBps (Sanity Check)CRC32 A534026F COUNTER.004 9.42 MBps Crc (FatFs) 3479 ms 9.42 MBps SysTick Sanity32768000 Bytes, 450635554 Cycles 15.71 MBps Write (FatFs) 2086 ms run time 15.71 MBps (Sanity Check)CRC32 A534026F COUNTER.004 9.50 MBps Crc (FatFs) 3449 ms 9.50 MBps SysTick SanityCOUNTER.00432768000 Bytes, 313841835 Cycles 22.55 MBps Read (FatFs) 1453 ms 22.55 MBps SysTick Sanity32768000 Bytes, 314532393 Cycles 22.50 MBps Read (FatFs) 1456 ms 22.51 MBps SysTick Sanity20000A10 20000A20 16384 /TRILO/TRILO.003CRC32 13363AF4 PKZIP ECC9C50B /TRILO/TRILO.00320000A10 20000A20 30720 /TRILO/TRILO.003CRC32 13363AF4 PKZIP ECC9C50B /TRILO/TRILO.00320000A10 20000A20 32768 /TRILO/TRILO.003CRC32 13363AF4 PKZIP ECC9C50B /TRILO/TRILO.00320000A10 20000A20 65536 /TRILO/TRILO.003CRC32 13363AF4 PKZIP ECC9C50B /TRILO/TRILO.003Done!PLL P:216000000 Q:108000000 R: 72000000PLL48CLK 108000000, 108.00 MHzSDCLK2 54000000, 54.00 MHz00000900Infinite Loop...

[Tesla DeLorean]

Posted on June 18, 2018 at 13:49

I've worked with 16GB, 32GB and 128GB successfully, and worked with a couple of people to get 8GB Sandisk eMMC functioning.

The 4 and 8GB parts should work materially the same, but tend to be at the bottom end of the scale. As costs drop I suspect some of the smaller devices will decline in availability. The form factor permits a transition to next available sizes.

[Raghavan K]

Posted on June 18, 2018 at 13:56

That's great to know. The ODROID module you mentioned is cool. I shall use this to test my program on the kit. But, finally I would like to make a PCB with STM32F769I interfaced to eMMC. Can I get any reference design for this purpose?

[Tesla DeLorean]

Posted on June 18, 2018 at 14:15

The adapter for uSD looks like this

The module itself is very simple, also see attached PDF (open thread in thread view rather than inbox view to see attachment)

Integration into a design should be a trivial exercise.

________________ Attachments : EMMC_BD_0.3.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HxTm&d=%2Fa%2F0X0000000ayj%2Fgt9h6YjcaMmWPhuh2UlzrR6OLFIfLni6cuCADYi5ntg&asPdf=false