Add missing include

.gitignore

@@ -137,4 +137,6 @@ fabric.properties
 *.old
 
 # build
-/build
+/build
+
+/refs

.idea/misc.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+  <component name="CMakeWorkspace" IGNORE_OUTSIDE_FILES="true" PROJECT_DIR="$PROJECT_DIR$" />
 </project>

CMakeLists.txt

@@ -68,6 +68,7 @@ foreach (component ${COMPONENTS})
 endforeach()
 list(REMOVE_DUPLICATES INCLUDE_DIRS)
 include_directories(${INCLUDE_DIRS})
+include_directories(${IDF_PATH}/components/soc/esp32/include)
 include_directories("build/include")
 #include_directories("components/arduino-esp32/cores/esp32/")
 #include_directories("components/OneWire/")

README.md

@@ -1,5 +1,3 @@
-# Hello World Example
+# Laser Pong
 
-Starts a FreeRTOS task to print "Hello World"
-
-See the README.md file in the upper level 'examples' directory for more information about examples.
+ESP32 code to control 2 servos which draw (part of) a PONG game.

main/laserpong_main.c

@@ -17,6 +17,14 @@ void app_main()
 {
     printf("Hello world!\n");
 
+    /*
+     * According to the data sheet, the SG90 9g micro servos
+     * operate at 0.1s / 60deg
+     * and require a pwm signal at 50Hz
+     * with duty length of "about" 1.0 - 1.5 - 2.0 ms
+     * for all the way left, center, all the way right
+     */
+
     ledc_timer_config_t timer_conf;
     timer_conf.duty_resolution = LEDC_TIMER_15_BIT;
     timer_conf.freq_hz = 50;
@@ -33,6 +41,8 @@ void app_main()
     ledc_conf.timer_sel = LEDC_TIMER_0;
     ledc_channel_config(&ledc_conf);
 
+    LEDC_CHANNEL_1
+
     /* Print chip information */
     esp_chip_info_t chip_info;
     esp_chip_info(&chip_info);

sdkconfig

@@ -20,8 +20,7 @@ CONFIG_LOG_BOOTLOADER_LEVEL_INFO=y
 CONFIG_LOG_BOOTLOADER_LEVEL_DEBUG=
 CONFIG_LOG_BOOTLOADER_LEVEL_VERBOSE=
 CONFIG_LOG_BOOTLOADER_LEVEL=3
-CONFIG_BOOTLOADER_VDDSDIO_BOOST_1_8V=
-CONFIG_BOOTLOADER_VDDSDIO_BOOST_1_9V=y
+CONFIG_BOOTLOADER_VDDSDIO_BOOST=y
 
 #
 # Security features