![]() By modifying U-Boot source code, you can create your own built-in commands. 4.2 Built-in commands For a complete list and brief descriptions of the built-in commands, at the U-Boot monitor prompt, U-Boot commands 4.1 Overview U-Boot has a set of built-in commands for booting the system, managing memory, and updating an embedded system’s firmware. The SMI in the DP83822 device, compatible U-Boot commands 4.1 Overview U-Boot has a set of built-in commands for booting the system, managing memory, and updating an embedded system’s firmware. The MDIO within the PRU-ICSS in AMIC110 implements the 802.3 serial management interface (SMI) to interrogate and control two Ethernet PHYs simultaneously using a shared 2-wire bus. For a U-Boot with the same syntax of kernel, except for "reset-assert-us" and "reset-deassert-us" properties which are not managed (values of this properties are hardcoded in driver (udelay (2)), the values can be modified with function: eqos_start_resets_stm32 of file: dwc_eth_qos.c 5 How to enable and use Wake on LAN (WoL) from GMACAfter the PHY is reset, it can be configured using the MDIO for the desired operation mode. There is also a section on how to read extended register over xsct. However, the flow below shows how this can be done simply via devmem incase such utilities are unavailable. For ease of use, users should use utilities such as mii dump in u-boot or similar in Linux too. ![]() "mdio write" command in u-boot, please refer to the following example.25 int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc) In this simple demo, we will see how to manually read the PHY registers over MDIO. is MII read uboot commands to read the MDIO lines. static int mdio_read (int skfd, int location). There is also a section on how to read extended register. Step 3: Load lightning-boot.bin into RAM Step 3a: Using SD/MMCIn this simple demo, we will see how to manually read the PHY registers over MDIO. Step 2: Boot to u-boot TODO: Put a link to the boot page here Do not load the kernel image in u-boot, we will not need it here. U boot mdio read example For a U-Boot with the same syntax of kernel, except for "reset-assert-us" and "reset-deassert-us" properties which are not managed (values of this properties are hardcoded in driver (udelay (2)), the values can be modified with function: eqos_start_resets_stm32 of file: dwc_eth_qos.c 5 How to enable and use Wake on LAN (WoL) from GMACStep 1a: Put your bootloader on your SD card If you have an SD-capable cartridge, copy the NAND-enabled lightning-boot.bin to the cartridge now.
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