221 lines
5.0 KiB
Markdown
221 lines
5.0 KiB
Markdown
# Eth Module
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| Since | Origin / Contributor | Maintainer | Source |
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| :----- | :-------------------- | :---------- | :------ |
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| 2019-06-25 | [Arnim Laeuger](https://github.com/devsaurus) |[Arnim Laeuger](https://github.com/devsaurus) | [eth.c](../../components/modules/eth.c)|
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The eth module provides access to the ethernet PHY chip configuration.
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Your board must contain one of the PHY chips that are supported by ESP-IDF:
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- IP101
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- LAN8720
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- TLK110
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## eth.get_mac()
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Get MAC address.
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#### Syntax
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```lua
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local mac = eth.get_mac()
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```
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#### Parameters
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None
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#### Returns
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MAC address as string "aa:bb:cc:dd:ee:dd".
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## eth.get_speed()
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Get Ethernet connection speed.
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#### Syntax
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```lua
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local speed = eth.get_speed()
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```
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#### Parameters
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None
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#### Returns
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Connection speed in Mbit/s, or error if not connected.
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- `10`
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- `100`
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## eth.init()
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Initialize the internal ethernet interface by configuring the MAC and PHY
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and starting the interface.
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Note that while the PHY model and some GPIO pins are configured at runtime,
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the clock configuration has been moved into the menuconfig and is no
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longer available at runtime. Please refer to the settings available
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under `Component config -> Ethernet -> Support ESP32 internal EMAC controller`.
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#### Syntax
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```lua
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eth.init(cfg)
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```
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#### Parameters
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- `cfg` table containing configuration data. Unless otherwise noted,
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the entries are mandatory:
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- `addr` PHY address, 0 to 31, optional (default will attempt auto-detect)
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- `mdc` MDC pin number
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- `mdio` MDIO pin number
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- `phy` PHY chip model, one of
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- `PHY_DP83848`
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- `PHY_IP101`
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- `PHY_KSZ8041`
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- `PHY_KSZ8081`
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- `PHY_LAN8720`
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- `PHY_RTL8201`
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- `power` power enable pin, optional
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#### Returns
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`nil`
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An error is thrown in case of invalid parameters, MAC/PHY setup errors, or if the ethernet interface has already been successfully configured.
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#### Example
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```lua
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-- Initialize ESP32-GATEWAY
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eth.init({phy = eth.PHY_LAN8720,
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addr = 0,
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power = 5,
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mdc = 23,
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mdio = 18})
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-- Initialize wESP32
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eth.init({phy = eth.PHY_LAN8720,
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addr = 0,
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mdc = 16,
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mdio = 17})
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-- Initialise wt32-eth01
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eth.init({ phy = eth.PHY_LAN8720, addr = 1, mdc = 23, mdio = 18, power = 16 })
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```
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## eth.on()
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Register or unregister callback functions for Ethernet events.
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#### Syntax
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```lua
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eth.on(event, callback)
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```
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#### Parameters
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- `event` Ethernet event to register the callback for:
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- "start"
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- "stop"
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- "connected"
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- "disconnected"
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- "got_ip"
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- `callback` callback `function(event, info)` to perform when event occurs, or `nil` to unregister the callback for the event. The `info` argument given to the callback is a table containing additional information about the event.
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Event information provided for each event is as follows:
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- `start`: no additional info
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- `stop`: no additional info
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- `connected`: no additional info
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- `disconnected`: no additional info
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- `got_ip`: IP network information:
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- `ip`: the IP address assigned
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- `netmask`: the IP netmask
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- `gw`: the gateway ("0.0.0.0" if no gateway)
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#### Example
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```lua
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function ev(event, info)
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print("event", event)
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if event == "got_ip" then
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print("ip:"..info.ip..", nm:"..info.netmask..", gw:"..info.gw)
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elseif event == "connected" then
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print("speed:", eth.get_speed())
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print("mac:", eth.get_mac())
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end
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end
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eth.on("connected", ev)
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eth.on("disconnected", ev)
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eth.on("start", ev)
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eth.on("stop", ev)
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eth.on("got_ip", ev)
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```
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## eth.set_mac()
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Set MAC address.
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#### Syntax
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```lua
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eth.set_mac(mac)
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```
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#### Parameters
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- `mac` MAC address as string "aa:bb:cc:dd:ee:ff"
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#### Returns
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`nil`
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An error is thrown in case of invalid parameters or if the ethernet driver failed.
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## eth.set_ip()
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Configures a static IPv4 address on the ethernet interface.
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Calling this function does three things:
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- disables the DHCP client for the ethernet interface
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- sets the IP address, netmask and gateway
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- set the DNS server to use
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Note that these settings are not persisted to flash.
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#### Syntax
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`eth.set_ip(cfg_opts)`
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#### Parameters
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- `cfg_opts` - table with the following fields:
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- `ip` static IPv4 address to set
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- `netmask` the network netmask
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- `gateway` default gateway to use
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- `dns` DNS server
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#### Returns
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`nil`
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An error is thrown in case of invalid parameters or if any of the options can
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not be set.
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#### Example
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```lua
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eth.set_ip({
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ip = "192.168.0.12",
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netmask = "255.255.255.0",
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gateway = "192.168.0.1",
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dns = "8.8.8.8"
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})
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```
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## eth.set_hostname()
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Configures the interface specific hostname for the ethernet interface. The ethernet interface must be initialized before the hostname can be configured.
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By default the system hostname is used, as configured in the menu config.
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#### Syntax
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```lua
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eth.set_hostname(hostname)
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```
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#### Parameters
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- `hostname` the hostname to use on the ethernet interface
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#### Returns
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`nil`
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An error is thrown in case the hostname cannot be set.
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