Summary
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=======
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This document covers various features of the 'am335x_shc' build.
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Hardware
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========
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AM335X based board:
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I2C: ready
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DRAM: 512 MiB
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Enabling the D-Cache
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MMC: OMAP SD/MMC: 0 @ 26 MHz, OMAP SD/MMC: 1 @ 26 MHz
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Net: cpsw
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Following boot options are possible:
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2 Jumpers:
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Jumper 1 Jumper 2 Bootmode
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off off eMMC boot
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on off SD boot
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off on Net boot
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Compiling
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=========
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$ make am335x_shc_defconfig
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HOSTCC scripts/basic/fixdep
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HOSTCC scripts/kconfig/conf.o
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SHIPPED scripts/kconfig/zconf.tab.c
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SHIPPED scripts/kconfig/zconf.lex.c
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SHIPPED scripts/kconfig/zconf.hash.c
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HOSTCC scripts/kconfig/zconf.tab.o
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HOSTLD scripts/kconfig/conf
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#
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# configuration written to .config
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#
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$ make -s all
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-> now you have the MLO and the u-boot.img file, you can put
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on your SD card or eMMC.
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Configuring
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===========
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There are a lot of board versions and boot configurations, which
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can be selected through "make menuconfig"
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ARM architecture --->
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enable different boot versions for the shc board (enable eMMC) --->
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(X) enable eMMC
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( ) enable ICT
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( ) enable NETBOOT
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( ) enable SDBOOT
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enable different board versions for the shc board (C3 Sample board version) --->
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( ) B Sample board version
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( ) B2 Sample board version
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( ) C Sample board version
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( ) C2 Sample board version
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(X) C3 Sample board version
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( ) Series board version
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Netboot
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=======
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- see also doc/SPL/README.am335x-network
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- set the jumper into netboot mode
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- compile the U-boot sources with:
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make am335x_shc_netboot_defconfig
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make all
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- copy the images into your tftp boot directory
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cp spl/u-boot-spl.bin /tftpboot/.../u-boot-spl-restore.bin
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cp u-boot.img /tftpboot/.../u-boot-restore.img
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- power on the board, and you should get something like this:
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U-Boot SPL 2016.05-rc2-00016-gf23b960-dirty (Apr 26 2016 - 09:02:18)
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#### NETBOOT ####
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SHC
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MPU reference clock runs at 6 MHz
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Setting MPU clock to 594 MHz
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Enabling Spread Spectrum of 18 permille for MPU
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Trying to boot from net
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Using default environment
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<ethaddr> not set. Validating first E-fuse MAC
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cpsw
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cpsw Waiting for PHY auto negotiation to complete... done
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link up on port 0, speed 100, full duplex
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BOOTP broadcast 1
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BOOTP broadcast 2
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DHCP client bound to address 192.168.20.91 (258 ms)
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Using cpsw device
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TFTP from server 192.168.1.1; our IP address is 192.168.20.91
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Filename 'shc/u-boot-restore.img'.
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Load address: 0x807fffc0
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Loading: ##################
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1.2 MiB/s
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done
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Bytes transferred = 262480 (40150 hex)
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U-Boot 2016.05-rc2-00016-gf23b960-dirty (Apr 26 2016 - 09:02:18 +0200)
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Watchdog enabled
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I2C: ready
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DRAM: 512 MiB
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MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
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*** Warning - bad CRC, using default environment
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Net: cpsw
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switch to partitions #0, OK
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