[WIP] Feature: component hosted #2093
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Superseded by #2305 |
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Sming's host emulator allows easier debugging and development of embedded applications. This component named "HostEd" extends the host emulator and facilitates testing functionality that only a real microcontroller can provide as for example digital I/O operations or SPI operations.
For example in order to run the Basic_Blink application under the host emulator and run the actual blinking of a LED on a microcontroller we can compile the application using the following directives:
make SMING_ARCH=Host ENABLE_HOSTED=tcp HOSTED_SERVER_IP=192.168.4.1
SMING_ARCH=Hostinstructs the build system to build the application for the Host architecture.ENABLE_HOSTED=tcpinstructs the host emulator to communication with the real microcontroller using TCPHOSTED_SERVER_IP=192.168.4.1instructs the host emulator to connect to IP192.168.4.1.We need to compile and flash also a special application on the desired microcontroller. That application will execute the commands send from the host emulator. The compilation and flashing for ESP32, for example, can be done using the following commands:
make hosted-app HOSTED_ARCH=Esp32 WIFI_SSID=YourSSID WIFI_PWD=YourPassword
make hosted-flash
If you replace
HOSTED_ARCH=Esp32withHOSTED_ARCH=Esp8266then the hosted application will be compiled and flashed on ESP8266 microcontroller.Make sure to replace the values of WIFI_SSID and WIFI_PWD with the actual name and password for the Access Point (AP).
Development
The communication between the host emulator and the hosted application is done via protocol buffer messages. The messages are described in the
proto/hosted.protofile and can be extended further.