esp32: add set_port.sh tool (unix only) to set serial port for esp tool

port/esp32/README.md

@@ -1,11 +1,11 @@
 # BTstack Port for the Espressif ESP32 Platform
 
-Status: Basic port incl. all examples. BTstack runs on dedicated FreeRTOS thread. Multi threading not supported.
+Status: Basic port incl. all examples. BTstack runs on dedicated FreeRTOS thread. Multi threading (calling BTstack functions from a different thread) is not supported.
 
 ## Setup
 
 - Follow [Espressif IoT Development Framework (ESP-IDF) setup](https://github.com/espressif/esp-idf) to install XTensa toolchain and the ESP-IDF.
-- In port/esp32, configure the serial port for firmware upload as described in the ESP-IDF setup guides.
+- In port/esp32/template, configure the serial port for firmware upload as described in the ESP-IDF setup guides.
 
 ## Usage
 

port/esp32/create_examples.py

@@ -55,9 +55,13 @@ for file in os.listdir(examples_embedded):
     os.makedirs(apps_folder)
 
     # copy files
-    for item in ['sdkconfig']:
+    for item in ['sdkconfig', 'set_port.sh']:
         shutil.copyfile(script_path + '/template/' + item, apps_folder + '/' + item)
 
+    # mark set_port.sh as executable
+    os.chmod(apps_folder + '/set_port.sh', 0o755)
+
+
     # create Makefile file
     with open(apps_folder + "Makefile", "wt") as fout:
         fout.write(mk_template.replace("EXAMPLE", example).replace("TOOL", script_path).replace("DATE",time.strftime("%c")))

port/esp32/template/set_port.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+PORT=$1
+sed -i "/CONFIG_ESPTOOLPY_PORT/c\CONFIG_ESPTOOLPY_PORT=\"$PORT\"" sdkconfig