i.MX ProcessorsのトピックRe: i.MXRT1050 BOOT from eMMC

i.MXRT1050 BOOT from eMMC

ramreddy — Thu, 23 Dec 2021 11:42:25 GMT

Hello NXP team,

Please help us on this query.

We are using i.MXRT1052 with SDK_2_10_0_EVKB-IMXRT1050 in one of our projects. Our board has provision to boot from SD card and eMMC. We are successfully able to flash the image in SD card and boot from it.

Our final aim is to boot from eMMC. The eMMC used on our hardware is Kingston "EMMC04G-W627-X02U". We are able to able to do basic read/write operation on EMMC so connections seems to be fine. However we are not able to boot from EMMC. We have referred other posts, shown below, on NXP forum and Application notes for the same but none of them provides an actual solution for booting from EMMC with imxRT.

https://mcuoneclipse.com/2019/01/22/tutorial-booting-the-nxp-i-mx-rt-from-micro-sd-card/

https://community.nxp.com/thread/352318

https://www.nxp.com/docs/en/application-note/AN12107.pdf

https://community.nxp.com/t5/i-MX-RT/i-MXRT1051-eMMC-boot/td-p/806269

As per the imxrt1050 Reference Manual the BOOT_CFG and BOOT_MODE pins needs to be configured as below to enable boot from EMMC:

BOOT_CFG[0] : 0

BOOT_CFG[1] : 1

BOOT_CFG[2] : 0 or 1(tried both)

BOOT_CFG[3] : 0

BOOT_CFG[4] : 0

BOOT_CFG[5] : 0

BOOT_CFG[6] : 0

BOOT_CFG[7] : 1

BOOT_CFG[8] : 0

BOOT_CFG[9] : 0

BOOT_CFG[10] : 0

BOOT_MODE[0] is LOW

BOOT_MODE[1] is LOW

We have flashed the image in eMMC using NXP_BOOT_UTILITY tool V3.3.0 and also able to read back the data written to EMMC using the tool, however device fails to boot-up from EMMC.

After flashing the code using boot utility tool, we are keeping the switches for BT_CFG[6], BT_CFG[9], BOOT_MODE[0] and BOOT_MODE [1] in low state. But looks like the internal ROM bootloader is not recognizing the changes made.

We also tried probing the EMMC lines during bootup. Our clock line is via GPIO_SD_B1_04. After making the above changes, we probed the CLK line going to eMMC but couldn’t find any clock signal. However clock for SD1_CLK was still there. Seems like the boot device mode is not switching to eMMC.

Is there anything missing that needs to be done for booting from iMXRT050? Any configuration which needs to be enabled to make it work? Any leads would be appreciated.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Fri, 24 Dec 2021 03:20:17 GMT

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
I think I need more information prior to figuring the issue out, so I was wondering if you provide the log of NXP-MCUBootUtility, further, I'd like to suggest you upload the read-back data.

Looking forward to your reply.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Fri, 24 Dec 2021 08:55:01 GMT

Hi jeremyzhou,

Thank you for the quick response.

I had attached read file of NXP-MCUBootUtility tool.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Fri, 24 Dec 2021 07:55:11 GMT

Hi,
I think you forget to provide the work log of NXP-MCUBootUtility.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Fri, 24 Dec 2021 11:47:48 GMT

Hi,

Kindly the requested files in the attachment.

Since out last mail we tried the following operation:

Boot_mode[0] - Low
Boot_mode[1] - High

Boot config[1] - High
Boot_config[6] - Low
Boot_config[7] - High
Boot_config[9] - Low

After making the above changes, we are able to get the clock, command and we are observed some data fetching on data 0 ,data 1, data 2, data 3 signals from the i.MXRT1052.
However emmc still fails to respond and the device failed to boot from EMMC.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Mon, 27 Dec 2021 07:42:17 GMT

Hi,

Thanks for your reply.
Firstly, I'd like to suggest you follow the steps illustrated in 3.5. MFG boot from SD Card in the AN12107, except for Step 8. Please use the below command for Step 8.
elftosb.exe -f kinetis -V -c ../../bd_file/imx10xx/program_mmccard_image_fastboot.bd -o boot_image.sb ivt_itcm_hello_world_nopadding.bin
After generating the sb file and program it to eMMC, then set the BOOT_CFG pins as the below.

BOOT_CFG1[0]	1
BOOT_CFG1[1]	1
BOOT_CFG1[2]	0
BOOT_CFG1[3]	0
BOOT_CFG1[4]	1
BOOT_CFG1[5]	1
BOOT_CFG1[6]	0
BOOT_CFG1[7]	1
BOOT_CFG2[0]	0
BOOT_CFG2[1]	1
BOOT_CFG2[2]	1

Meanwhile, set the Boot_Mode[1:0] = 10.

Please give it a try.

Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Mon, 27 Dec 2021 11:09:58 GMT

Hi,

We are using MCU expresso IDE in this we are able to generate .s19 binary only.

we are unable to find .icf file in Step 3.

any way we had tried with the .s19 file. we are able to generate the required files in the step 7.

ramreddy_0-1640601190333.png

while executing the Step 8 we are getting the error like below

D:\Projects\tools\Flashloader_RT1050_1.1\Tools\elftosb\win>elftosb.exe -f imx -V -c ../../bd_file/imx10xx/program_mmccard_image_fastboot.bd -o boot_image.sb ivt_itcm_hello_world_nopadding.bin
error: line 41: invalid source name 'myUserDataFile'

Also, we had tried with example .srec file given in the example section in flash loader. We got the below response.

ramreddy_2-1640602306193.png

D:\Projects\tools\Flashloader_RT1050_1.1\Tools\elftosb\win>elftosb.exe -f imx -V -c ../../bd_file/imx10xx/imx-itcm-unsigned.bd -o ivt_itcm_hello_world.bin led_demo_evk_ram_0xa000.srec
Section: 0x0
iMX bootable image generated successfully

D:\Projects\tools\Flashloader_RT1050_1.1\Tools\elftosb\win>elftosb.exe -f kinetis -V -c ../../bd_file/imx10xx/program_mmccard_image_fastboot.bd -o boot_image.sb ivt_itcm_hello_world_nopadding.bin
error: line 41: invalid source name 'myUserDataFile'

D:\Projects\tools\Flashloader_RT1050_1.1\Tools\elftosb\win>

can you please suggest if anything else we need to do.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Tue, 28 Dec 2021 02:56:26 GMT

Hi,
Thanks for your reply.
I've attached an S19 file and two bd files, you can follow the below steps to generate the SB file, then use the MfgTool to download it.
1) elftosb.exe -f imx -V -c imx-itcm-unsigned.bd -o evkbimxrt1050_hello_world.bin evkbimxrt1050_hello_world.s19
2) elftosb.exe -f kinetis -V -c program_mmccard_image_fastboot.bd -o boot_image.sb evkbimxrt1050_hello_world_nopadding.bin

The demo will print a string “i.MXRT1050 BOOT from eMMC” if boot-up successfully.

Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Tue, 28 Dec 2021 13:21:39 GMT

Hi,

we had tried the below command we are getting the error

C:\Users\rkadathala\Downloads\elftosb_5.1.19\elftosb_5.1.19\bin\win>elftosb.exe -f kinetis -V -c program_mmccard_image_fastboot.bd -o boot_image.sb evkbimxrt1050_hello_world_nopadding.bin

error: line 41: invalid source name 'myUserDataFile'

We had modified the command for normal boot it is building the .sb file successfully.

C:\Users\rkadathala\Downloads\elftosb_5.1.19\elftosb_5.1.19\bin\win>elftosb.exe -f kinetis -V -c program_mmccard_image_normal.bd -o boot_image.sb evkbimxrt1050_hello_world_nopadding.bin

Still we are unable to boot from eMMC (We did not observed any print in the console)

if possible take the remote for further assistance.

Thanks

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Wed, 29 Dec 2021 09:12:12 GMT

Hi,
Thanks for your reply.
In previous replies, I forgot to ask you to share the screenshot of Device Configuration when using the NXP_BOOT_UTILITY.
Further, I was wondering if you can share the schematic of your custom board.
Hope it helps.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Wed, 29 Dec 2021 10:57:47 GMT

Hi,

We are able to flash from MFG tool but unable to boot from eMMC. we are observing some data over command, data 0-3 lines.

We are using the below boot configuration with eMMC normal boot mode because we are getting error while building the .sb file with eMMC fast boot mode.

Boot_config_1 is High

Boot_config_6 is Low

Boot_config_7 is High

Boot_config_9 is Low

Boot_Mode_0 is Low

Boot_Mode_1 is High

Here is the Device config screenshot

ramreddy_0-1640770381938.png

The below screenshots represents the EMMC and Controller connections

ramreddy_2-1640771882741.png

The pullup resistors are populated on D0- D7 lines.

ramreddy_1-1640771784741.png

Kindly let us know how to proceed further.

Thanks.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Thu, 30 Dec 2021 08:33:04 GMT

Hi,
Thanks for your reply.
Firstly, refer to the eMMC connection of MCIMX6ULL-EVK to modify your board, especially removing the pull-up resistors.

jeremyzhou_0-1640852789989.png

Next, I'd like to suggest you use the NXP-MCUBootUtility to program evkbimxrt1050_hello_world.s19 with the above eMMc Device Configuration, after that, set the BOOT_CFG pins as the below table shows.

BOOT_CFG1[0]	0
BOOT_CFG1[1]	1
BOOT_CFG1[2]	0
BOOT_CFG1[3]	0
BOOT_CFG1[4]	0
BOOT_CFG1[5]	0
BOOT_CFG1[6]	0
BOOT_CFG1[7]	1
BOOT_CFG2[0]	0
BOOT_CFG2[1]	0
BOOT_CFG2[2]	0

Further, I'd like to suggest you upload the read-back data after programming evkbimxrt1050_hello_world.s19.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Thu, 30 Dec 2021 12:14:23 GMT

Hi,

Thanks for the support.

We tried the suggested changes but it made no difference and the device still couldn't boot from eMMC. I flashed the eMMC with the s19 file provided by you. I have attached the eMMC readback data obtained from NXP boot utility software for your reference.

On our board we have faced an issue wrt reading Extended CSD register during eMMC initialization. During initialization the device is able to get proper response for other commands such as OCR, CID and CSD but for extended CSD, eMMC fails to respond properly. To get around that issue, we have added retries for sending extended CSD command operation in fsl_mmc.c driver file. After failing for multiple times, it eventually succeeds and then only eMMC initialization is successful. After that we are not facing any issues with regards to Extended CSD but not sure whether that is correct way to move forward.

Could it be possible that the internal ROM bootloader is also facing similar issue of failing to get an adequate response for extended CSD command and is aborting the boot-up from eMMC upon failure?

I believe that the issue could be resolved faster if we can take this discussion off this forum and have a call for the same. Kindly do let know whether that is possible and also how to proceed from here.

Regard

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Fri, 31 Dec 2021 09:09:29 GMT

Hi,
Thanks for your reply.
Firstly, After going through the readbackBootDeviceMemory.rar, the NXP boot utility program the s19 file (output a string via the LPUART1_TXD_GPIO_AD_B0_12 pin) successfully.
1) Could it be possible that the internal ROM bootloader is also facing similar issue of failing to get an adequate response for extended CSD command and is aborting the boot-up from eMMC upon failure?
-- Actually, I'm not sure, as the ROM code is confidential, even for me.
so I'd like to suggest you use the logic analyzer to capture the data for further analysis.
2) I believe that the issue could be resolved faster if we can take this discussion off this forum and have a call for the same. Kindly do let know whether that is possible and also how to proceed from here.
-- Sorry, we don't provide phone support, however, you can send me your board if it's okay for you, then I can do some tests by myself.

Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Wed, 05 Jan 2022 12:50:50 GMT

Hi,

We are trying to send one board with you may be it will take some time.

Parallelly we tried one iteration with EVK board where we had removed the hyper flash and connect the respective signal lines to our custom board EMMC.

The boot configuration on the EVK board was as below.

Switch	Value
SW 5	1000
SW 6	0100
SW 7	0010

we could observe the clock line during the bootup from eMMC but it seems like it couldn't come out from that state. To verify the communication with the eMMC we had used evkbimxrt1050_mmccard_freertos example project. Here also we observed the same issue of failure to read the Extended CSD register. where as that OCR, CID,CSD is getting passed and we are able to see the data and validated that data with eMMC datasheet.

Initially we tried with IO Voltage as 1.8V with that we are able to read the registers except Ex_CSD register.

1. Will the length of the data line cause any issues while reading from the Ex_CSD register?

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Thu, 06 Jan 2022 07:38:17 GMT

Hi,
Thanks for your reply.
1) Will the length of the data line cause any issues while reading from the Ex_CSD register?
-- No, I don't think so and in my opinion, the case may be related to the ROM code, whereas, it needs me to do some testing to validate it.
I'll send my address information via private message later.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Thu, 27 Jan 2022 08:44:47 GMT

Hi，
I already received the board and please send a schematic of it to help me to get familiar with the board.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Thu, 27 Jan 2022 10:51:49 GMT

Hi,

Thanks for replying.

The attached screenshot represents the eMMC section.

1. Pullups on D0-D7 are DNP.

I'm not having permissions to share the entire schematics with you. If you need any thing related to eMMC I'll share.

Thanks.

Ramreddy.

Re: i.MXRT1050 BOOT from eMMC

jeremyzhou — Fri, 28 Jan 2022 07:11:15 GMT

Hi，
Thanks for your reply.
Firstly, let me introduce what problem I encountered.
So far, I've not made the board to enter the Serial Downloader mode,
so you'd better share or upload a hardware setup guide.
Next, I have some inquiries about the board, and please clarify them.
I see the SW1 on the board and I think it's used to configure the boot-up mode, however, it can't configure the RT1050 to select the eMMC as the boot-up device via these four options, so does the board provide other switches or options?
Furthermore, I don't need the complete schematic of the board, I just want the schematic of the minimum system of the RT1050, which includes the boot setting, SDRAM, eMMC, serial port, debug interface, etc.
Have a great day,
TIC

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Re: i.MXRT1050 BOOT from eMMC

ramreddy — Fri, 28 Jan 2022 13:18:51 GMT

Hi,

Thanks for reply.

I see the SW1 on the board and I think it's used to configure the boot-up mode, however, it can't configure the RT1050 to select the eMMC as the boot-up device via these four options, so does the board provide other switches or options?

We had mounted the eMMC Normal boot mode configurations by using pullup resistors.

Furthermore, I don't need the complete schematic of the board, I just want the schematic of the minimum system of the RT1050, which includes the boot setting, SDRAM, eMMC, serial port, debug interface, etc.

I will share the document containing above points in private chat.

Thanks,

Ramreddy.