Add target build for ESP8266 board.

JerryScript-DCO-1.0-Signed-off-by: SaeHie Park saehie.park@samsung.com
2015-12-08 16:07:30 +09:00
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+### About
+
+Files in this folder (embedding/esp8266) are copied from
+examples/project_template of esp_iot_rtos_sdk and modified for JerryScript.
+You can view online from [this](https://github.com/espressif/esp_iot_rtos_sdk/tree/master/examples/project_template) page.
+
+
+### How to build JerryScript for ESP8266
+
+#### 1. SDK
+
+Follow [this](./docs/ESP-PREREQUISITES.md) page to setup build environment
+
+
+#### 2. Patch ESP-SDK for JerryScript
+
+Follow [this](./docs/ESP-PATCHFORJERRYSCRIPT.md) page to patch for JerryScript building.
+Below is a summary after SDK patch is applied.
+
+#### 3. Building JerryScript
+
+```
+cd ~/harmony/jerryscript
+make -f ./targets/esp8266/Makefile.esp8266 clean
+make -f ./targets/esp8266/Makefile.esp8266
+```
+
+Output files should be placed at $BIN_PATH
+
+#### 4. Flashing for ESP8266 ESP-01 board (WiFi Module)
+
+Steps are for ESP8266 ESP-01(WiFi) board. Others may vary.
+Refer http://www.esp8266.com/wiki/doku.php?id=esp8266-module-family page.
+
+##### 4.1 GPIO0 and GPIO2
+
+Before flashing you need to follow the steps.
+
+1. Power off ESP8266
+2. Connect GPIO0 to GND and GPIO2 to VCC
+3. Power on ESP8266
+4. Flash
+
+##### 4.2 Flashing
+
+```
+make -f ./targets/esp8266/Makefile.esp8266 flash
+```
+
+Default USB device is `/dev/ttyUSB0`. If you have different one, give with `USBDEVICE`, like;
+
+```
+USBDEVICE=/dev/ttyUSB1 make -f ./targets/esp8266/Makefile.esp8266 flash
+```
+
+
+### 5. Running
+
+1. Power off
+2. Disonnect(float) both GPIO0 and GPIO2
+3. Power on
+
+Sample program here works with LED and a SW with below connection.
+* Connect GPIO2 to a LED > 4K resistor > GND
+* Connect GPIO0 between VCC > 4K resistor and GND
+
+If GPIO0 is High then LED is turned on longer. If L vice versa.