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diff --git a/board/digilent/zybo/readme.txt b/board/digilent/zybo/readme.txt new file mode 100644 index 0000000000..2a60a7cc17 --- /dev/null +++ b/board/digilent/zybo/readme.txt @@ -0,0 +1,76 @@ +Digilent Zybo +============= + +This is the Buildroot board support for the Digilent Zybo. The Zybo is +a development board based on the Xilinx Zynq-7000 based All-Programmable +System-On-Chip. + +Zybo information including schematics, reference designs, and manuals are +available from http://store.digilentinc.com/zybo-zynq-7000-arm-fpga-soc-trainer-board/ . + +If you want a custom FPGA bitstream to be loaded by U-Boot, copy it as +system.bit in board/digilent/zybo/. + +Steps to create a working system for Zybo: + +1) make zynq_zybo_defconfig +2) make +3) write your SD Card with the sdcard.img file using dd by doing + $ sudo dd if=output/images/sdcard.img of=/dev/sdX +4) insert the SD Card and power up your Zybo +5) Expect serial console on the second USB serial port exposed by the board + +The expected output: + + U-Boot SPL 2016.05 (May 20 2016 - 16:16:24) + mmc boot + Trying to boot from MMC1 + reading system.dtb + spl_load_image_fat_os: error reading image system.dtb, err - -1 + reading u-boot-dtb.img + reading u-boot-dtb.img + + + U-Boot 2016.05 (May 20 2016 - 16:16:24 +0200) + + Model: Zynq ZYBO Development Board + Board: Xilinx Zynq + I2C: ready + DRAM: ECC disabled 512 MiB + MMC: sdhci@e0100000: 0 + SF: Detected S25FL128S_64K with page size 256 Bytes, erase size 64 KiB, total 16 MiB + In: serial@e0001000 + Out: serial@e0001000 + Err: serial@e0001000 + Model: Zynq ZYBO Development Board + Board: Xilinx Zynq + Net: ZYNQ GEM: e000b000, phyaddr 0, interface rgmii-id + I2C EEPROM MAC address read failed + + Warning: ethernet@e000b000 (eth0) using random MAC address - 56:64:dd:a7:6d:94 + eth0: ethernet@e000b000 + ... + +Resulting system +---------------- +Once the build process is finished you will have an image called "sdcard.img" +in the output/images/ directory. + +The first partition is a FAT32 partition created at the beginning of the SD Card +that contains the following files : + /BOOT.BIN + /zynq-zybo.dtb + /uEnv.txt + /system.bit + /uImage + /u-boot-dtb.img + +The second partition is an ext4 partition that contains the root filesystem. + +You can alter the booting procedure by modifying the uEnv.txt file +in first partition of the SD card. It is a plain text file in format +<key>=<value> one per line: + +kernel_image=myimage +modeboot=myboot +myboot=... |