i.MX ProcessorsのトピックRe: saving environment variables to SDCARD instead how to save it to FLASH

saving environment variables to SDCARD instead how to save it to FLASH

ramanjineyuluth — Tue, 22 Aug 2017 10:16:20 GMT

Hi,

I am currently working on U-Boot source code.

I have to change the uboot environment variables saving to SDCARD instead i have to store into FLASH.

I would like to know what are the changes i have to do to save it to FLASH.

board specific header file contains the below macro

#define CONFIG_ENV_IS_IN_MMC

I think may be i have replace the above line with #define CONFIG_ENV_IS_IN_FLASH

Still any changes i have to do to save uboot environment variables.

I have also added the FLASH base address and OFFSET and environment size.

Please give any suggestion to save it to FLASH.

Thanks & Regards,

Ramanjineyulu.

Re: saving environment variables to SDCARD instead how to save it to FLASH

igorpadykov — Sun, 27 Aug 2017 22:46:12 GMT

Hi Ramanjineyulu

you are right, for saving uboot environment variables in flash it is sufficient to
set #define CONFIG_ENV_IS_IN_FLASH, no other changes in uboot sources
are necessary.

Best regards
igor
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Re: saving environment variables to SDCARD instead how to save it to FLASH

ramanjineyuluth — Mon, 28 Aug 2017 07:31:13 GMT

Hi Igor,

Thanks for your reply.

Below are the changes in board specific header file.

#define CONFIG_ENV_IS_IN_FLASH

#define CONFIG_SYS_FLASH_BASE CONFIG_SYS_FSL_FLASH0_BASE

#define FLASH_SECTOR_SIZE 0x40000

#define CONFIG_SYS_MAX_FLASH_BANKS 1
#define CONFIG_ENV_SIZE (0x2000) /* 8 KB */
#define CONFIG_ENV_SECT_SIZE (FLASH_SECTOR_SIZE) /* 256 KB */
#define CONFIG_SYS_MAX_FLASH_SECT (0x4000000 / CONFIG_ENV_SECT_SIZE)
#define CONFIG_ENV_OFFSET 2 * CONFIG_ENV_SECT_SIZE

I have comment MMC related macros.

When i have compiled the source code am getting the below error.

u-boot/common/board_r.c:364: undefined reference to `flash_init'
common/built-in.o: In function `addr2info':

u-boot/common/flash.c:95: undefined reference to `flash_info'

u-boot/common/flash.c:163: undefined reference to `write_buff'
common/built-in.o: In function `do_env_save':

u-boot/common/cmd_nvedit.c:710: undefined reference to `saveenv'
Segmentation fault (core dumped)
Makefile:1207: recipe for target 'u-boot' failed
make: *** [u-boot] Error 139

Could you please help on this.

Thanks & Regards,

Ramanjineyulu Thota.

Re: saving environment variables to SDCARD instead how to save it to FLASH

igorpadykov — Mon, 28 Aug 2017 10:09:04 GMT

Hi Ramanjineyulu

what uboot version used in the case, please try nxp release imx_v2016.03 :

http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/tree/?h=imx_v2016.03_4.1.15_2.0.0_ga

Best regards
igor