kopia lustrzana https://github.com/espressif/esp-idf
ethernet: add eth2ap example
This example illustrates how to do Layer2 packet forwarding bussiness between Wi-Fi and Ethernet.pull/7874/head
suda-morris
rodzic
126b687c75
commit
813c9dcf22
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cmake_minimum_required(VERSION 3.5)
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include($ENV{IDF_PATH}/tools/cmake/project.cmake)
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project(eth2ap)
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#
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# This is a project Makefile. It is assumed the directory this Makefile resides in is a
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# project subdirectory.
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#
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PROJECT_NAME := eth2ap
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include $(IDF_PATH)/make/project.mk
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# eth2ap Example
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(See the README.md file in the upper level 'examples' directory for more information about examples. To try a more complex application about Ethernet to WiFi data forwarding, please go to [iot-solution](https://github.com/espressif/esp-iot-solution/tree/master/examples/eth2wifi).)
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## Overview
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The similarities on MAC layer between Ethernet and Wi-Fi make it easy to forward packets from Ethernet to Wi-Fi and vice versa. This example illustrates how to implement a simple "router" which only supports forwarding packets between Ethernet port and Wi-Fi AP interface. In this case, the Ethernet should play the role of WAN (i.e. it can access outside network) so that a mobile device could get access to the Internet when it gets connected to ESP32 through Wi-Fi.
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**Note:** In this example, ESP32 works like a *bridge* between Ethernet and Wi-Fi, and it won't perform any actions on Layer3 and higher layer, which means there's no need to initialize the TCP/IP stack.
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## How to use this example
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### Hardware Required
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To run this example, it's recommended that you have an official ESP32 Ethernet development board - [ESP32-Ethernet-Kit](https://docs.espressif.com/projects/esp-idf/en/latest/hw-reference/get-started-ethernet-kit.html). This example should also work for 3rd party ESP32 board as long as it's integrated with a supported Ethernet PHY chip. Up until now, ESP-IDF supports three Ethernet PHY: `TLK110`, `LAN8720` and `IP101`, additional PHY drivers should be implemented by users themselves.
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### Configure the project
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Enter `make menuconfig` if you are using GNU Make based build system or enter `idf.py menuconfig` if you are using CMake based build system. Then go into `Example Configuration` menu.
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* Choose PHY device under `Ethernet PHY Device`, by default, the **ESP32-Ethernet-Kit** has an `IP101` on board.
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* Set PHY address under `Ethernet PHY address`, it should depend on the PHY configuration of your hardware. You'd better consult the schematic of the board. By default, the PHY address of **ESP32-Ethernet-Kit** is *1*.
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* Check whether or not to control the power of PHY chip under `Use PHY Power (enable / disable) pin`, (if set true, you also need to give the GPIO number of that pin under `PHY Power GPIO`).
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* Set SMI MDC/MDIO GPIO number according to board schematic, by default they are set as below:
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| Default Example GPIO | RMII Signal | Notes |
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| -------------------- | ----------- | ------------- |
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| GPIO23 | MDC | Output to PHY |
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| GPIO18 | MDIO | Bidirectional |
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* Select one kind of RMII clock mode under `Ethernet RMII Clock Mode` option. Possible configurations of the clock are listed as below. By default, ESP32-Ethernet-Kit use the `GPIO0 input` mode, which gives a good performance when enabling Ethernet and Wi-Fi at the same time.
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| Mode | GPIO Pin | Signal name | Notes |
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| -------- | -------- | ------------ | ------------------------------------------------------------ |
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| external | GPIO0 | EMAC_TX_CLK | Input of 50MHz PHY clock |
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| internal | GPIO0 | CLK_OUT1 | Output of 50MHz APLL clock |
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| internal | GPIO16 | EMAC_CLK_OUT | Output of 50MHz APLL clock |
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| internal | GPIO17 | EMAC_CLK_180 | Inverted output of 50MHz APLL clock (suitable for long clock trace) |
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* External RMII clock must be connected to `GPIO0`.
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* ESP32 can generate the RMII clock(50MHz) using its internal APLL. But if the APLL has already been used for other peripheral (e.g. I²S), you'd better choose the external clock.
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* Set the SSID and password for Wi-Fi ap interface under `Wi-Fi SSID` and `Wi-Fi Password`.
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* Set the maximum connection number under `Maximum STA connections`.
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### Build and Flash
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To build and flash the example, enter `make -j4 flash monitor` if you are using GNU Make based build system or enter `idf.py build flash monitor` if you are using CMake based build system.
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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### Step 1: Initialize Ethernet and Wi-Fi (AP mode)
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```bash
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I (508) example: Power On Ethernet PHY
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I (518) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
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I (518) emac: emac reset done
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I (518) example: Ethernet Started
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......
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I (538) wifi: wifi driver task: 3ffc7fbc, prio:23, stack:3584, core=0
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I (538) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
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I (538) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
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I (568) wifi: wifi firmware version: ec61a20
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I (568) wifi: config NVS flash: enabled
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I (568) wifi: config nano formating: disabled
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I (568) wifi: Init dynamic tx buffer num: 32
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I (568) wifi: Init data frame dynamic rx buffer num: 32
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I (578) wifi: Init management frame dynamic rx buffer num: 32
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I (588) wifi: Init management short buffer num: 32
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I (588) wifi: Init static rx buffer size: 1600
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I (588) wifi: Init static rx buffer num: 10
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I (598) wifi: Init dynamic rx buffer num: 32
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```
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### Step 2: Ethernet Connects to Router/Switch/PC (with DHCP server enabled)
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```bash
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I (4518) example: Ethernet Link Up
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```
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### Step 3: Start Wi-Fi AP
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```bash
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I (4618) phy: phy_version: 4100, 2a5dd04, Jan 23 2019, 21:00:07, 0, 0
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I (4618) wifi: mode : softAP (30:ae:a4:c6:87:5b)
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I (4628) wifi: Total power save buffer number: 16
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I (4628) wifi: Init max length of beacon: 752/752
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I (4628) wifi: Init max length of beacon: 752/752
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```
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### Step 4: Wi-Fi station (e.g. mobile phone) connects to ESP32's Wi-Fi
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```bash
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I (10168) wifi: new:<1,0>, old:<1,0>, ap:<1,1>, sta:<255,255>, prof:1
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I (10168) wifi: station: c4:0b:cb:ec:9a:84 join, AID=1, bgn, 20
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I (10258) example: AP got a station connected
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```
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Now your mobile phone should get access to the Internet.
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## Troubleshooting
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* Got error message `emac: emac rx buf err` when running the example.
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* This example just forwards the packets on the Layer2 between Wi-Fi and Ethernet, it won't do any Layer3 business. So make sure you have disabled the `CONFIG_ETH_EMAC_L2_TO_L3_RX_BUF_MODE`. By default, this option is false in the `sdkconfig.defaults` file.
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* Got error message `example: WiFi send packet failed: -1` when running the example.
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* Ethernet process packets faster than Wi-Fi on ESP32, so have a try to enlarge the value of `FLOW_CONTROL_WIFI_SEND_DELAY_MS`.
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* Wi-Fi station doesn't receive any IP via DHCP.
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* All Layer 3 (TCP/IP functions) on the ESP32 are disabled, including the SoftAP DHCP server. This means that devices must be able to access another DHCP server (for example on a Wi-Fi router connected via ethernet) or should use statically assigned IP addresses.
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Plik binarny nie jest wyświetlany.
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Po Szerokość: | Wysokość: | Rozmiar: 87 KiB |
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set(COMPONENT_SRCS "eth2ap_example_main.c")
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set(COMPONENT_ADD_INCLUDEDIRS ".")
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register_component()
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menu "Example Configuration"
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choice EXAMPLE_PHY_MODEL
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prompt "Ethernet PHY Device"
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default EXAMPLE_PHY_IP101
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help
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Select the PHY driver to use for the example.
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config EXAMPLE_PHY_IP101
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bool "IP101"
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help
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IP101 is a single port 10/100 MII/RMII/TP/Fiber Fast Ethernet Transceiver.
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Goto http://www.icplus.com.tw/pp-IP101G.html for more information about it.
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config EXAMPLE_PHY_TLK110
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bool "TLK110"
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help
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TLK110 is an Industrial 10/100Mbps Ethernet Physical Layer Transceiver.
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Goto http://www.ti.com/product/TLK110 for information about it.
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config EXAMPLE_PHY_LAN8720
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bool "LAN8720"
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help
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LAN8720 is a small footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support.
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Goto https://www.microchip.com/LAN8720A for more information about it.
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endchoice
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config EXAMPLE_PHY_ADDRESS
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int "Ethernet PHY Address"
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default 1
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range 0 31
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help
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PHY Address of your PHY device. It depends on your schematic design.
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choice EXAMPLE_PHY_CLOCK_MODE
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prompt "Ethernet RMII Clock Mode"
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default EXAMPLE_PHY_CLOCK_GPIO0_IN
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help
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Select external (input on GPIO0) or internal (output on GPIO0, GPIO16 or GPIO17) RMII clock.
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config EXAMPLE_PHY_CLOCK_GPIO0_IN
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bool "GPIO0 Input"
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help
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Input of 50MHz RMII clock on GPIO0.
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config EXAMPLE_PHY_CLOCK_GPIO0_OUT
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bool "GPIO0 Output"
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help
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Output the internal 50MHz RMII clock on GPIO0.
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config EXAMPLE_PHY_CLOCK_GPIO16_OUT
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bool "GPIO16 Output"
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help
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Output the internal 50MHz RMII clock on GPIO16.
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config EXAMPLE_PHY_CLOCK_GPIO17_OUT
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bool "GPIO17 Output (inverted)"
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help
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Output the internal 50MHz RMII clock on GPIO17 (inverted signal).
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endchoice
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config EXAMPLE_PHY_CLOCK_MODE
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int
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default 0 if EXAMPLE_PHY_CLOCK_GPIO0_IN
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default 1 if EXAMPLE_PHY_CLOCK_GPIO0_OUT
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default 2 if EXAMPLE_PHY_CLOCK_GPIO16_OUT
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default 3 if EXAMPLE_PHY_CLOCK_GPIO17_OUT
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config EXAMPLE_PHY_USE_POWER_PIN
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bool "Use PHY Power (enable / disable) pin"
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default y
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help
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Use a GPIO "power pin" to power the PHY on/off during operation.
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When using GPIO0 to input RMII clock, the reset process will be interfered by this clock.
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So we need another GPIO to control the switch on / off of the RMII clock.
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if EXAMPLE_PHY_USE_POWER_PIN
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config EXAMPLE_PHY_POWER_PIN
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int "PHY power pin"
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default 5
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range 0 33
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help
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Set the GPIO number used for powering on/off the PHY.
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endif
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config EXAMPLE_PHY_SMI_MDC_PIN
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int "Ethernet SMI MDC gpio number"
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default 23
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range 0 33
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help
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GPIO number used for SMI clock signal.
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config EXAMPLE_PHY_SMI_MDIO_PIN
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int "Ethernet SMI MDIO gpio number"
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default 18
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range 0 33
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help
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GPIO number used for SMI data signal.
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config EXAMPLE_WIFI_SSID
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string "Wi-Fi SSID"
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default "eth2ap"
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help
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Set the SSID of Wi-Fi ap interface.
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config EXAMPLE_WIFI_PASSWORD
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string "Wi-Fi Password"
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default "12345678"
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help
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Set the password of Wi-Fi ap interface.
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config EXAMPLE_MAX_STA_CONN
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int "Maximum STA connections"
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default 4
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help
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Maximum number of the station that allowed to connect to current Wi-Fi hotspot.
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endmenu
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#
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# "main" pseudo-component makefile.
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#
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# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)
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/* eth2ap (Ethernet to Wi-Fi AP packet forwarding) Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/queue.h"
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#include "esp_event_loop.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_eth.h"
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#include "esp_wifi.h"
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#include "nvs_flash.h"
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#include "esp_private/wifi.h"
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#include "driver/gpio.h"
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#include "sdkconfig.h"
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// Choose the default phy config according to Kconfig
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#if CONFIG_EXAMPLE_PHY_LAN8720
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#include "eth_phy/phy_lan8720.h"
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#define DEFAULT_ETHERNET_PHY_CONFIG phy_lan8720_default_ethernet_config
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#elif CONFIG_EXAMPLE_PHY_TLK110
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#include "eth_phy/phy_tlk110.h"
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#define DEFAULT_ETHERNET_PHY_CONFIG phy_tlk110_default_ethernet_config
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#elif CONFIG_EXAMPLE_PHY_IP101
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#include "eth_phy/phy_ip101.h"
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#define DEFAULT_ETHERNET_PHY_CONFIG phy_ip101_default_ethernet_config
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#endif
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#define FLOW_CONTROL_QUEUE_TIMEOUT_MS (100)
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#define FLOW_CONTROL_QUEUE_LENGTH (10)
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#define FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS (100)
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static const char *TAG = "example";
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typedef struct {
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void *packet;
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uint16_t length;
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} flow_control_msg_t;
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static xQueueHandle flow_control_queue = NULL;
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static bool s_sta_is_connected = false;
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static bool s_ethernet_is_connected = false;
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static uint8_t s_eth_mac[6];
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#ifdef CONFIG_EXAMPLE_PHY_USE_POWER_PIN
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/**
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* @brief power control function for phy
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*
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* @param enable: set true to enable PHY power, set false to disable PHY power
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*
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* @note This function replaces the default PHY power on/off function.
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* If this GPIO is not connected on your device (and PHY is always powered),
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* you can use the default PHY-specific power on/off function.
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*/
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static void phy_device_power_enable_via_gpio(bool enable)
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{
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assert(DEFAULT_ETHERNET_PHY_CONFIG.phy_power_enable);
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if (!enable) {
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/* call the default PHY-specific power off function */
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DEFAULT_ETHERNET_PHY_CONFIG.phy_power_enable(false);
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}
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gpio_pad_select_gpio(CONFIG_EXAMPLE_PHY_POWER_PIN);
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gpio_set_direction(CONFIG_EXAMPLE_PHY_POWER_PIN, GPIO_MODE_OUTPUT);
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if (enable) {
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gpio_set_level(CONFIG_EXAMPLE_PHY_POWER_PIN, 1);
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ESP_LOGI(TAG, "Power On Ethernet PHY");
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} else {
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gpio_set_level(CONFIG_EXAMPLE_PHY_POWER_PIN, 0);
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ESP_LOGI(TAG, "Power Off Ethernet PHY");
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}
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vTaskDelay(1);
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if (enable) {
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/* call the default PHY-specific power on function */
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DEFAULT_ETHERNET_PHY_CONFIG.phy_power_enable(true);
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}
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}
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#endif
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/**
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* @brief gpio specific init
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*
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* @note RMII data pins are fixed in esp32 as follows:
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* TXD0 <=> GPIO19
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* TXD1 <=> GPIO22
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* TX_EN <=> GPIO21
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* RXD0 <=> GPIO25
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* RXD1 <=> GPIO26
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* CLK <=> GPIO0
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*
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*/
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static void eth_gpio_config_rmii(void)
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{
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phy_rmii_configure_data_interface_pins();
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phy_rmii_smi_configure_pins(CONFIG_EXAMPLE_PHY_SMI_MDC_PIN, CONFIG_EXAMPLE_PHY_SMI_MDIO_PIN);
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}
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// Forward packets from Wi-Fi to Ethernet
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static esp_err_t pkt_wifi2eth(void *buffer, uint16_t len, void *eb)
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{
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if (s_ethernet_is_connected) {
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if (esp_eth_tx(buffer, len) != ESP_OK) {
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ESP_LOGE(TAG, "Ethernet send packet failed");
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}
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}
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esp_wifi_internal_free_rx_buffer(eb);
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return ESP_OK;
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}
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// Forward packets from Ethernet to Wi-Fi
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// Note that, Ethernet works faster than Wi-Fi on ESP32,
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// so we need to add an extra queue to balance their speed difference.
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static esp_err_t pkt_eth2wifi(void *buffer, uint16_t len, void *eb)
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{
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esp_err_t ret = ESP_OK;
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flow_control_msg_t msg = {
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.packet = buffer,
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.length = len
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};
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if (xQueueSend(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) != pdTRUE) {
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ESP_LOGE(TAG, "send flow control message failed or timeout");
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ret = ESP_FAIL;
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}
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return ret;
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}
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// This task will fetch the packet from the queue, and then send out through Wi-Fi.
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// Wi-Fi handles packets slower than Ethernet, we might add some delay between each transmitting.
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static void eth2wifi_flow_control_task(void *args)
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{
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flow_control_msg_t msg;
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int res = 0;
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uint32_t timeout = 0;
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while (1) {
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if (xQueueReceive(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) == pdTRUE) {
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timeout = 0;
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if (s_sta_is_connected && msg.length > 4) {
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do {
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vTaskDelay(pdMS_TO_TICKS(timeout));
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timeout += 2;
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res = esp_wifi_internal_tx(ESP_IF_WIFI_AP, msg.packet, msg.length - 4);
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} while (res == -1 && timeout < FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "WiFi send packet failed: %d", res);
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}
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}
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esp_eth_free_rx_buf(msg.packet);
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}
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}
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vTaskDelete(NULL);
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}
|
||||
|
||||
// Event handler for Ethernet
|
||||
static void eth_event_handler(void *arg, esp_event_base_t event_base,
|
||||
int32_t event_id, void *event_data)
|
||||
{
|
||||
switch (event_id) {
|
||||
case ETHERNET_EVENT_CONNECTED:
|
||||
ESP_LOGI(TAG, "Ethernet Link Up");
|
||||
s_ethernet_is_connected = true;
|
||||
esp_eth_get_mac(s_eth_mac);
|
||||
esp_wifi_set_mac(WIFI_IF_AP, s_eth_mac);
|
||||
ESP_ERROR_CHECK(esp_wifi_start());
|
||||
break;
|
||||
case ETHERNET_EVENT_DISCONNECTED:
|
||||
ESP_LOGI(TAG, "Ethernet Link Down");
|
||||
s_ethernet_is_connected = false;
|
||||
ESP_ERROR_CHECK(esp_wifi_stop());
|
||||
break;
|
||||
case ETHERNET_EVENT_START:
|
||||
ESP_LOGI(TAG, "Ethernet Started");
|
||||
break;
|
||||
case ETHERNET_EVENT_STOP:
|
||||
ESP_LOGI(TAG, "Ethernet Stopped");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Event handler for Wi-Fi
|
||||
static void wifi_event_handler(void *arg, esp_event_base_t event_base,
|
||||
int32_t event_id, void *event_data)
|
||||
{
|
||||
switch (event_id) {
|
||||
case WIFI_EVENT_AP_STACONNECTED:
|
||||
ESP_LOGI(TAG, "Wi-Fi AP got a station connected");
|
||||
s_sta_is_connected = true;
|
||||
esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_AP, pkt_wifi2eth);
|
||||
break;
|
||||
case WIFI_EVENT_AP_STADISCONNECTED:
|
||||
ESP_LOGI(TAG, "Wi-Fi AP got a station disconnected");
|
||||
s_sta_is_connected = false;
|
||||
esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_AP, NULL);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void initialize_ethernet(void)
|
||||
{
|
||||
eth_config_t config = DEFAULT_ETHERNET_PHY_CONFIG;
|
||||
config.phy_addr = CONFIG_EXAMPLE_PHY_ADDRESS;
|
||||
config.gpio_config = eth_gpio_config_rmii;
|
||||
config.clock_mode = CONFIG_EXAMPLE_PHY_CLOCK_MODE;
|
||||
config.tcpip_input = pkt_eth2wifi;
|
||||
config.promiscuous_enable = true;
|
||||
#ifdef CONFIG_EXAMPLE_PHY_USE_POWER_PIN
|
||||
/* Replace the default 'power enable' function with an example-specific one that toggles a power GPIO. */
|
||||
config.phy_power_enable = phy_device_power_enable_via_gpio;
|
||||
#endif
|
||||
ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, eth_event_handler, NULL));
|
||||
ESP_ERROR_CHECK(esp_eth_init_internal(&config));
|
||||
ESP_ERROR_CHECK(esp_eth_enable());
|
||||
}
|
||||
|
||||
static void initialize_wifi(void)
|
||||
{
|
||||
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
|
||||
ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, wifi_event_handler, NULL));
|
||||
ESP_ERROR_CHECK(esp_wifi_init_internal(&cfg));
|
||||
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
|
||||
wifi_config_t wifi_config = {
|
||||
.ap = {
|
||||
.ssid = CONFIG_EXAMPLE_WIFI_SSID,
|
||||
.ssid_len = strlen(CONFIG_EXAMPLE_WIFI_SSID),
|
||||
.password = CONFIG_EXAMPLE_WIFI_PASSWORD,
|
||||
.max_connection = CONFIG_EXAMPLE_MAX_STA_CONN,
|
||||
.authmode = WIFI_AUTH_WPA_WPA2_PSK
|
||||
},
|
||||
};
|
||||
if (strlen(CONFIG_EXAMPLE_WIFI_PASSWORD) == 0) {
|
||||
wifi_config.ap.authmode = WIFI_AUTH_OPEN;
|
||||
}
|
||||
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
|
||||
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
|
||||
}
|
||||
|
||||
static esp_err_t initialize_flow_control(void)
|
||||
{
|
||||
flow_control_queue = xQueueCreate(FLOW_CONTROL_QUEUE_LENGTH, sizeof(flow_control_msg_t));
|
||||
if (!flow_control_queue) {
|
||||
ESP_LOGE(TAG, "create flow control queue failed");
|
||||
return ESP_FAIL;
|
||||
}
|
||||
BaseType_t ret = xTaskCreate(eth2wifi_flow_control_task, "flow_ctl", 2048, NULL, (tskIDLE_PRIORITY + 2), NULL);
|
||||
if (ret != pdTRUE) {
|
||||
ESP_LOGE(TAG, "create flow control task failed");
|
||||
return ESP_FAIL;
|
||||
}
|
||||
return ESP_OK;
|
||||
}
|
||||
|
||||
void app_main()
|
||||
{
|
||||
esp_err_t ret = nvs_flash_init();
|
||||
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
|
||||
ESP_ERROR_CHECK(nvs_flash_erase());
|
||||
ret = nvs_flash_init();
|
||||
}
|
||||
ESP_ERROR_CHECK(ret);
|
||||
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
||||
ESP_ERROR_CHECK(initialize_flow_control());
|
||||
|
||||
initialize_ethernet();
|
||||
initialize_wifi();
|
||||
}
|
||||
|
|
@ -0,0 +1 @@
|
|||
CONFIG_ETH_EMAC_L2_TO_L3_RX_BUF_MODE=n
|
||||
Ładowanie…
Reference in New Issue