Which preloader image to use?

Banana Pi Router design
12

we have update BPI-R2 , please check it.

aaa
aaa.png989×921 45.6 KB

2 Likes
13

As this differs from eMMC string,how can we now check for bootsevice in uboot? Which address is set to which byte (i guess 0xea).this should work too if sd is available but boot from emmc

it looks like you read boot signature from first bytes (SDMMC_BOOT vs. EMMC_BOOT) of mmc-device…but how is this passed to uboot?

14

The uboot code doesn’t need to change, just like before

1 Like
15

We should have EMMC string on memory address 0x81dffff0?

16

yes, R2 have update this code.

1 Like
17

Thank you, we will try this one: https://github.com/BPI-SINOVOIP/BPI-files/blob/master/SD/100MB/BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz

@LeXa2 can you try it too?

edit:

echo 0 > /sys/block/mmcblk1boot0/force_ro
gunzip -c BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz  | dd of=/dev/mmcblk1boot0 bs=1024 seek=0

seems to work well:

BPI-R2> md.b 0x81dffff0 4
81dffff0: 65 4d 4d 43                                        eMMC

i can also load bigger uboot (2020-01 with ahci-support, so it looks good so far)

1 Like
18

Sure will do, but not today - in a middle of house move right now. Probably would be able to test it on Friday.

19

Have you tested it? From my PoV it looks good

20

Nice question, I would like to know deeply. Please clear it.

21

Hello Frank-w,

Currently I can not boot u-boot from SD. it have the same problem. But I can boot u-boot completely from eMMC after following your instruction My preloader for SD: preloader_iotg7623Np1_sd_1333M.bin and my preloader for emmc is BPI-R2-EMMC-boot0-DDR1600-20190722-0k.img.gz U-boot version: https://github.com/frank-w/u-boot.git

Can you suggest to me some step to fix this issue ?

Thank so much

22

which issue do you have?? SD or eMMC? my repo contains multiple uboot-versions…whch one do you use?

23

Currently I can not boot u-boot from SD but can boot u-boot from eMMC my u-boot that i use: 2019-07-bpi-r2

24

then just use the 20190722 preloader for SD-Card instead of your old one

these both should be for SD:

https://github.com/BPI-SINOVOIP/BPI-files/blob/master/SD/100MB/BPI-R2-preloader-DDR1600-20191024-2k.img.gz

https://github.com/BPI-SINOVOIP/BPI-files/blob/master/SD/100MB/BPI-R2-preloader-DDR1600-20190722-2k.img.gz

for emmc you should use this one

https://github.com/BPI-SINOVOIP/BPI-files/blob/master/SD/100MB/BPI-R2-EMMC-boot0-DDR1600-20191024-0k.img.gz

because only this has extended memory-range for uboot and the emmc-flag

1 Like
25

OK I will try again thank you so much.

And I have also 1 question about use 4G module at link

Do you have file “ppp1.sh” ? Can you send to me ? Because I can not download “ppp1.sh” from Viet Nam

Thanks

26

unrelated to this topic and no, i don’t have it…i also don’t have such module

1 Like
27

OK. Thank you so much I will flash preloader again

28

And do you have source code of preloader ? Can you share me ? Thanks

29

preloader is closed source, for the memory-expansion (to load bigger uboot) and the emmc-flag we needed vendor-support

1 Like
30

I got it. thank you so much

31

Hai frank… can you guide me how to write to sd card or emmc… I use armbian and stuck on <0x81e00004>=0xe59ff014