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Parsing and generating code

This folder contains scripts for parsing esp_wifi component headers and configs and generates configs, headers and sources of esp_wifi_remote.

The CI job runs the parse and generation step, after which the generated files appear locally in this folder. Then the CI jobs compares the generated files with the specific version files. In case of a mismatch (CI failure), please check if the generated file is correct. If so, update the component and create a new version. If not, update the scripts.

Parsing esp_wifi headers

Extract prototypes from the selected wifi headers

Generating Kconfig

  • Kconfig -- we only replace SOC_WIFI_ -> SLAVE_SOC_WIFI_ and IDF_TARGET_ -> SLAVE_IDF_TARGET_ configs
  • Kconfig.soc_wifi_caps.in -- we parse IDF/components/soc/$SLAVE/include/soc/Kconfig.soc_caps.in for all slaves and collect SOC_WIFI_ configs, which we enclose with if SLAVE_IDF_TARGET... ... endif. This way the slave's WiFi capabilities become runtime available in esp_wifi_remote submenu

Generating headers and forwarding to esp_hosted

Based on extracted WiFi function prototypes we generate

  • esp_wifi_remote_api.h -- declares all wifi APIs with esp_wifi_remote...() prefix
  • esp_wifi_with_remote.c -- defines all original wifi APIs that forward calls for esp_wifi_remote -- This file is used only for targets with no WiFi capabilities, so the original WiFi APIs could be called the same way as on WiFi targets. (this file is not compiled for targets with WiFi caps)
  • esp_wifi_remote_with_hosted.h -- defines static inline functions that directly forward calls from esp_wifi_remote to esp_hosted

Generating slave's WiFi native types

  • esp_wifi_types_native.h -- defines specific WiFi types based on the selected WiFI slave and its capabilities. We use the original header and only replace CONFIG_SOC_WIFI_ -> CONFIG_SLAVE_SOC_WIFI_ and CONFIG_IDF_TARGET_ -> CONFIG_SLAVE_IDF_TARGET_ configs

Generating test cases

This component includes a simple build-only test that exercises all APIs from esp_wifi_remote (and also from esp_wifi). The test is also generated by the same script, since we know the function prototypes, so we could tell what parameters we call the exercised APIs. This test includes a mocked version of the esp_hosted component, so the generated files are:

  • esp_hosted_mock.c -- all WiFi APIs to just return a default value (typically ESP_OK)
  • esp_hosted_mock.h -- declares all WiFi related APIs
  • Kconfig -- selection of all SLAVE targets (with WiFi capabilities)
  • all_wifi_calls.c -- calls all WiFi APIs (to check that targets without WiFi caps can use the original APIs)
  • all_wifi_remote_calls.c -- calls all remote WiFi APIs (to check that also the targets with WiFi caps can use the remote wifi functionality)