使用mdio read命令可以读取指定PHY设备的寄存器值。例如,要从总线ethernet@e000c000上的PHY地址0的寄存器2读取数据: markdown Zynq> mdio read ethernet@e000c000 0 2 Reading from bus ethernet@e000c000 PHY at address 0: 2 - 0xffff 4. 写入PHY寄存器 使用mdio write命令可以向指定PHY设备的寄存器写入数据。
//bit[11:10]:0x0—— Write Address Register //bit[9:5]:写入SMI设备地址-0x15——Port 10 Lane 1 = Port 5 & its registers are accessed at SMI address 0x15 //bit[4:0]:device class(clause 45) //第一个地址帧的后16位为Addr,即data register中的数据0x2000 miiwrite 0x1c 0x19 0x8140...
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这里说明下,phy device与mac device是分开的,2者通过mdio bus来通信,硬件上的体现就是mdio mdc这二个脚。这里有...的。跟硬件反馈这个问题,硬件修改,发现在sunxi_mac_reset(),init时复位mac准备通信时超时出错,加大超时时间,再试ok。(当然软件部份这里还有其它影藏问题,是由于不同项目兼容引起的 Linux Mii ...
same period as the MDC clock. The MDIO bits are latched on the rising edge of the MDC clock. MDC may be stopped between frames provided no timing requirements are violated.MDC must be active during each valid bit of every frame, including all preamble, instruction, address, data, and at ...
#include<linux/miscdevice.h> /* bb:bit-bang,通过gpio引脚,用软件模拟通信*/ #defineMDIO117/* MDIO correspond PD21 */ #defineMDC116/* MDC correspond PD20 */ #defineMDIO_DELAY250 #defineMDIO_READ_DELAY350 /* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit...
(mv88e6xxx) device attached to BUS using address ID. If ID is 0, single-chip addressing is used; all other IDs use multi-chip addressing. REG: u5|"global1"|"global2" u5 xrs PHYAD Operate of Arrow/Flexibilis XRS700x device using address PHYAD. REG: u32 (Stride of 2, only even ...
JosephAtNXP NXP TechSupport Hi, Thank you for your interest in NXP Semiconductor products, The guideline to troubleshoot this would be: Make sure you have correctly mapped your FEC MDI signals to the strapped address PHY and that is mapped to the correct et...
版本 16.2 English The following table describes the optional MDIO interface signals of the core that are used to access the PCS management registers. These signals are typically connected to the MDIO port of a MAC device, either off-chip or to an internal MAC core. For more information, see...
We also have the ethernet interface, and this is the device tree configuration: &fec { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_fec>; phy-mode = "rmii"; phy-handle = <ðphy0>; phy-supply = <®_on_veth>; status = "okay"; mdio { #address-cells = <1>; #size-...