donghengqaz commented on a change in pull request #1893:
URL: https://github.com/apache/incubator-nuttx/pull/1893#discussion_r494716868



##########
File path: arch/xtensa/src/esp32/Make.defs
##########
@@ -136,3 +136,36 @@ ifeq ($(CONFIG_ARCH_USE_MODULE_TEXT),y)
 CHIP_CSRCS += esp32_modtext.c
 CMN_ASRCS += xtensa_loadstore.S
 endif
+
+ifeq ($(CONFIG_ESP32_WIRELESS),y)
+WIRELESS_DRV_UNPACK  = esp-wireless-drivers-3rdparty
+WIRELESS_DRV_ZIP     = master.zip
+WIRELESS_DRV_URL     = 
https://github.com/espressif/esp-wireless-drivers-3rdparty/archive

Review comment:
       > I only added comments to some simple things because I cannot really 
review the actual contents of this PR since I'm not familiar with WiFi code in 
NuttX. However, I must say that the adapter file has a **lot** going on, it is 
a really big file with lots of auxiliary functions. Also, I feel that is quite 
an obscure implementation, it is very difficult to understand what is this code 
doing in general, I only get little pieces by looking at the small comments for 
each function.
   > 
   > It would be good to add some general documentation, either in the form of 
a README or simple as more detailed comments explaining what all this code is 
doing and what each part is doing.
   > I fear that besides the obvious fact that there's some closed code behind 
this, this code itself will be difficult to maintain/debug by someone else as 
is.
   > 
   > That said, I really appreciate the support for ESP32 WiFi on NuttX.
   
   There are 2 main source files, one is `esp32_wlan.c` and another is 
`esp32_wifi_adapter.c`, we can think the `esp32_wlan.c` is alike with 
`esp32_emac.c`, and it realizes the Ethernet communication. 
`esp32_wifi_adapter.c` is mainly contains of `OS adapter` fucntions, like 
`task, semaphore, mutex, message queue`, even including `libc`, `log`, `file 
system` and so on. So it mainly have no specific logic. 
   
   But when espressif developed the wifi driver, they don't fully consider 
porting this driver to other OS platforms, so there are some complex designing 
which I think should be taken into libraries. Because these logic functions are 
not related to porting OS adapter functions. So I have been trying to improve 
the wifi adapter layer to reduce the functions which we should add to support 
other OS.




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