DESK-MX6UL-L/Peripherals/Ethernet
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| 2023/05/04 | DESK-MX6UL-L 4.0.0 release | ||
Contents
Peripheral Ethernet[edit | edit source]
The ethernet interface is made available through the i.MX6UL fec interface which should be initialized on the device tree.
Device tree configuration[edit | edit source]
Here below an example of device tree configuration used on standard DAVE's kit for the AXEL ULite SOM:
From imx6ul-axelulite.dtsi:
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet1>;
phy-mode = "rmii";
phy-handle = <&\ethphy0>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@3 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <3>;
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET_REF>;
clock-names = "rmii-ref";
};
};
};
...
...
&iomuxc {
...
...
pinctrl_enet1: enet1grp {
fsl,pins = <
MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN 0x1b0b0
MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 0x4001b0a8
MX6UL_PAD_GPIO1_IO07__ENET1_MDC 0x1b0b0
MX6UL_PAD_GPIO1_IO06__ENET1_MDIO 0x1b0b0
MX6UL_PAD_SNVS_TAMPER1__GPIO5_IO01 0x1b0b0 /* ETH_PHY_RST */
MX6UL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x1b0b0 /* ETH_INT */
>;
};
...
...
};
Accessing the peripheral[edit | edit source]
AXEL ULite SOM provides the primary network interface mapped at eth0.
Linux messages at boot time[edit | edit source]
... ... [ 1.771162] fec 2188000.ethernet eth0: registered PHC device 0 [ 23.370105] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx ... ... [ 20.262485] Micrel KSZ8081 or KSZ8091 2188000.ethernet-1:03: attached PHY driver (mii_bus:phy_addr=2188000.ethernet-1:03, irq=POLL) ... ...
Cable connection:
... ... [ 93.046409] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx ... ...
Check the interface with ifconfig[edit | edit source]
root@desk-mx6ul-axelulite:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.4.159 netmask 255.255.255.0 broadcast 192.168.4.255
inet6 fe80::bc0a:b6ff:fe9b:b0f8 prefixlen 64 scopeid 0x20<link>
ether be:0a:b6:9b:b0:f8 txqueuelen 1000 (Ethernet)
RX packets 331 bytes 36636 (35.7 KiB)
RX errors 0 dropped 47 overruns 0 frame 0
TX packets 77 bytes 11278 (11.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Test with iperf[edit | edit source]
root@desk-mx6ul-axelulite:~# iperf3 -t 5 -c 192.168.4.47 Connecting to host 192.168.4.47, port 5201 [ 5] local 192.168.4.159 port 56244 connected to 192.168.4.47 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 11.3 MBytes 94.7 Mbits/sec 0 143 KBytes [ 5] 1.00-2.00 sec 10.8 MBytes 90.4 Mbits/sec 0 143 KBytes [ 5] 2.00-3.00 sec 10.8 MBytes 90.1 Mbits/sec 0 150 KBytes [ 5] 3.00-4.00 sec 10.9 MBytes 91.2 Mbits/sec 0 150 KBytes [ 5] 4.00-5.00 sec 10.8 MBytes 90.3 Mbits/sec 0 157 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-5.00 sec 54.4 MBytes 91.3 Mbits/sec 0 sender [ 5] 0.00-5.05 sec 54.1 MBytes 89.9 Mbits/sec receiver iperf Done.
