On Wed, Apr 8, 2015 at 10:53 AM, Robert Nelson <[email protected]> wrote: > On Wed, Apr 8, 2015 at 10:44 AM, Robert P. J. Day <[email protected]> > wrote: >> On Wed, 8 Apr 2015, Robert Nelson wrote: >> >>> U-Boot# i2c md 0x50 0x0c.2 >>> 000c: 30 30 30 43 32 34 31 34 42 42 42 4b 30 31 30 33 000C2414BBBK0103 >> >> and just to clarify an earlier curiosity of mine, is it true that >> u-boot's "eeprom" command has no relevance here? i've never used that >> command but it seems that BBB EEPROM access must be done exclusively >> via i2c, correct? > > Well, it is wired up: > > 204 #define CONFIG_CMD_EEPROM > 205 #define CONFIG_ENV_EEPROM_IS_ON_I2C > 206 #define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 /* Main EEPROM */ > 207 #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 2 > 208 #define CONFIG_SYS_I2C_MULTI_EEPROMS > > and looking at: > > http://lists.denx.de/pipermail/u-boot/2007-September/025043.html > > The i2c md command is just more useful....
Great way to reset the board. ;) U-Boot# eeprom read 0x50 0 0 10 EEPROM @0x50 read: addr 00000000 off 0000 count 16 ... I2C read: NULL pointer passed done U-Boot# md 0 00000000:data abort pc : [<9ff8ac3c>] lr : [<9ff8ac10>] reloc pc : [<8083ec3c>] lr : [<8083ec10>] sp : 9ef2bce0 ip : 00000000 fp : 00000000 r10: 00000000 r9 : 9ef2bed8 r8 : 00000000 r7 : 00000004 r6 : 00000004 r5 : 00000004 r4 : 00000040 r3 : 44e09000 r2 : 44e09000 r1 : 9ef2bcf4 r0 : 00000009 Flags: nZCv IRQs off FIQs on Mode SVC_32 Resetting CPU ... resetting ... U-Boot SPL 2015.04-rc5-00002-g252073b (Apr 07 2015 - 10:00:16) Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
