77 lines
2.2 KiB
Plaintext
77 lines
2.2 KiB
Plaintext
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Digilent Zybo
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=============
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This is the Buildroot board support for the Digilent Zybo. The Zybo is
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a development board based on the Xilinx Zynq-7000 based All-Programmable
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System-On-Chip.
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Zybo information including schematics, reference designs, and manuals are
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available from http://store.digilentinc.com/zybo-zynq-7000-arm-fpga-soc-trainer-board/ .
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If you want a custom FPGA bitstream to be loaded by U-Boot, copy it as
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system.bit in board/digilent/zybo/.
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Steps to create a working system for Zybo:
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1) make zynq_zybo_defconfig
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2) make
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3) write your SD Card with the sdcard.img file using dd by doing
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$ sudo dd if=output/images/sdcard.img of=/dev/sdX
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4) insert the SD Card and power up your Zybo
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5) Expect serial console on the second USB serial port exposed by the board
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The expected output:
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U-Boot SPL 2016.05 (May 20 2016 - 16:16:24)
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mmc boot
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Trying to boot from MMC1
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reading system.dtb
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spl_load_image_fat_os: error reading image system.dtb, err - -1
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reading u-boot-dtb.img
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reading u-boot-dtb.img
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U-Boot 2016.05 (May 20 2016 - 16:16:24 +0200)
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Model: Zynq ZYBO Development Board
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Board: Xilinx Zynq
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I2C: ready
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DRAM: ECC disabled 512 MiB
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MMC: sdhci@e0100000: 0
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SF: Detected S25FL128S_64K with page size 256 Bytes, erase size 64 KiB, total 16 MiB
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In: serial@e0001000
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Out: serial@e0001000
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Err: serial@e0001000
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Model: Zynq ZYBO Development Board
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Board: Xilinx Zynq
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Net: ZYNQ GEM: e000b000, phyaddr 0, interface rgmii-id
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I2C EEPROM MAC address read failed
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Warning: ethernet@e000b000 (eth0) using random MAC address - 56:64:dd:a7:6d:94
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eth0: ethernet@e000b000
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...
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Resulting system
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----------------
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Once the build process is finished you will have an image called "sdcard.img"
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in the output/images/ directory.
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The first partition is a FAT32 partition created at the beginning of the SD Card
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that contains the following files :
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/BOOT.BIN
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/zynq-zybo.dtb
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/uEnv.txt
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/system.bit
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/uImage
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/u-boot-dtb.img
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The second partition is an ext4 partition that contains the root filesystem.
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You can alter the booting procedure by modifying the uEnv.txt file
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in first partition of the SD card. It is a plain text file in format
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<key>=<value> one per line:
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kernel_image=myimage
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modeboot=myboot
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myboot=...
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