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en:c1_tinkering [2015/04/10 14:54] codewalker |
en:c1_tinkering [2017/03/27 09:38] brian.kim [Python example] |
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+ | ====== Introduction C Tinkering Kit on Ubuntu ====== | ||
+ | {{http://dn.odroid.com/homebackup/C-Breadboard1H.jpg?500|}} | ||
+ | You're probably itching to make some fun embedded computer projects with **ODROID-C**. What you need is an add on prototyping T-breakout board, which can break out all those tasty power, GPIO, I2C, ADC pins from the 40 pin header onto a solderless breadboard. This set will make "cobbling together" prototypes with the **ODROID-C** super easy. | ||
+ | |||
+ | This kit comes with below many items. | ||
+ | * Assembled T-breakout PCB - 40Pin GPIO Breakout board | ||
+ | * Breadboard - 630 Tie-points with dual power lanes | ||
+ | * 40pin Ribbon cable - IDC Flat cable 100mm | ||
+ | * 40pin Male-to-Male Dupont jumper Wire 170mm | ||
+ | * 7 x Green LED 3mm | ||
+ | * 7 x Yellow LED 3mm | ||
+ | * 7 x Red LED 3mm | ||
+ | * 2 x Photo Cell (CdS Light sensor) | ||
+ | * 6 x Tact Switchs | ||
+ | * 50 x 330 Ohm 1/6W resister | ||
+ | * 50 x 10K Ohm 1/6W resister | ||
+ | |||
+ | |||
+ | |||
+ | [[http://www.hardkernel.com/main/products/prdt_info.php?g_code=G141637532784|Where to buy]] | ||
+ | |||
+ | ====== DIY light level meter project ====== | ||
+ | Configuration tinkering kit such as below schematic. | ||
+ | |||
+ | Please refer to below links for ODROID-C2 user or details related to gpio mapping. | ||
+ | |||
+ | [[en:c1_hardware#expansion_connectors | C1 Expansion Connectors]]\\ | ||
+ | [[en:c2_hardware#expansion_connectors | C2 Expansion Connectors]] | ||
+ | |||
+ | {{:en:c1:tinkering.jpg?500|}} | ||
+ | |||
+ | ===== Linux ===== | ||
+ | ==== C example ==== | ||
+ | 1. Get the wiringPi library compatible **ODROID** | ||
+ | |||
+ | git clone https://github.com/hardkernel/wiringPi | ||
+ | |||
+ | 2. Build the library | ||
+ | |||
+ | cd wiringPi | ||
+ | ./build | ||
+ | |||
+ | 3. Compile and run the example source code. | ||
+ | |||
+ | {{http://dn.odroid.com/source_peripherals/ctinkeringkit/example-led.c|example-led.c}} | ||
+ | wget http://dn.odroid.com/source_peripherals/ctinkeringkit/example-led.c | ||
+ | gcc -o example-led example-led.c -lwiringPi -lwiringPiDev -lpthread | ||
+ | sudo ./example-led | ||
+ | |||
+ | ==== Python example ==== | ||
+ | |||
+ | * [[https://github.com/hardkernel/WiringPi2-Python|WiringPi2-Python repository for ODROID]] | ||
+ | |||
+ | **Prerequisites**: You must have //**python-dev**// and //**python-setuptools**// installed If you manually rebuild the bindings with swig-python wiringpi.i | ||
+ | |||
+ | sudo apt-get install python-dev python-setuptools swig3.0 | ||
+ | | ||
+ | 1. Get/setup WiringPi 2 for Python repository | ||
+ | |||
+ | <code> | ||
+ | git clone https://github.com/hardkernel/WiringPi2-Python.git | ||
+ | cd WiringPi2-Python | ||
+ | git submodule init | ||
+ | git submodule update | ||
+ | </code> | ||
+ | |||
+ | 2. Build & install | ||
+ | swig3.0 -python -threads wiringpi.i | ||
+ | sudo python setup.py build install | ||
+ | |||
+ | 3. Get/Run the example source code | ||
+ | |||
+ | {{http://dn.odroid.com/source_peripherals/ctinkeringkit/example-led.py|example-led.py}} | ||
+ | wget http://dn.odroid.com/source_peripherals/ctinkeringkit/example-led.py | ||
+ | sudo python example-led.py | ||
+ | |||
+ | ===== Android ===== | ||
+ | |||
+ | This process explains how to make an Android app which can access IO ports.\\ | ||
+ | You need to install Google Android SDK/NDK on your host PC first to start below steps. | ||
+ | |||
+ | Insert this line into your ~/.bashrc file. | ||
+ | |||
+ | <code> | ||
+ | export NDK_PATH=/home/xxx/android-ndk-r10d | ||
+ | </code> | ||
+ | |||
+ | 1. Download the wiringPi library and example App source code. | ||
+ | <code> | ||
+ | # git clone https://github.com/codewalkerster/example-led | ||
+ | </code> | ||
+ | |||
+ | 2. Build a JNI library | ||
+ | <code> | ||
+ | $ cd example-led | ||
+ | $ cd jni | ||
+ | $ ndk-build | ||
+ | Android NDK: WARNING: APP_PLATFORM android-16 is larger than android:minSdkVersion 7 in /media/codewalker/92fc070a-3bc1-43e0-af27-03d08ba9dd3e/home/codewalker/workspace/xxxx/example-led/AndroidManifest.xml | ||
+ | [armeabi] Compile thumb : wiringPi <= wiringPi.c | ||
+ | /media/codewalker/92fc070a-3bc1-43e0-af27-03d08ba9dd3e/home/codewalker/workspace/xxxx/example-led/jni/wiringPi/wiringPi.c:147:0: warning: "PAGE_SIZE" redefined [enabled by default] | ||
+ | #define PAGE_SIZE (4*1024) | ||
+ | ^ | ||
+ | In file included from /home/codewalker/projects/android-ndk-r10d/platforms/android-21/arch-arm/usr/include/signal.h:34:0, | ||
+ | from /home/codewalker/projects/android-ndk-r10d/platforms/android-21/arch-arm/usr/include/poll.h:34, | ||
+ | from /media/codewalker/92fc070a-3bc1-43e0-af27-03d08ba9dd3e/home/codewalker/workspace/xxxx/example-led/jni/wiringPi/wiringPi.c:59: | ||
+ | /home/codewalker/projects/android-ndk-r10d/platforms/android-21/arch-arm/usr/include/limits.h:119:0: note: this is the location of the previous definition | ||
+ | #define PAGE_SIZE 4096 | ||
+ | ^ | ||
+ | /media/codewalker/92fc070a-3bc1-43e0-af27-03d08ba9dd3e/home/codewalker/workspace/xxxx/example-led/jni/wiringPi/wiringPi.c: In function 'interruptHandler': | ||
+ | /media/codewalker/92fc070a-3bc1-43e0-af27-03d08ba9dd3e/home/codewalker/workspace/xxxx/example-led/jni/wiringPi/wiringPi.c:1865:7: warning: return makes pointer from integer without a cast [enabled by default] | ||
+ | return wiringPiFailure (WPI_FATAL, "wiringPiISR: wiringPi has not been initialised. Unable to continue.\n") ; | ||
+ | ^ | ||
+ | [armeabi] Compile thumb : wiringPi <= wiringShift.c | ||
+ | [armeabi] Compile thumb : wiringPi <= piHiPri.c | ||
+ | [armeabi] Compile thumb : wiringPi <= piThread.c | ||
+ | [armeabi] Compile thumb : wiringPi <= wiringPiSPI.c | ||
+ | [armeabi] Compile thumb : wiringPi <= wiringPiI2C.c | ||
+ | [armeabi] Compile thumb : wiringPi <= softPwm.c | ||
+ | [armeabi] Compile thumb : wiringPi <= softTone.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp23008.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp23016.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp23017.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp23s08.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp23s17.c | ||
+ | [armeabi] Compile thumb : wiringPi <= sr595.c | ||
+ | [armeabi] Compile thumb : wiringPi <= pcf8574.c | ||
+ | [armeabi] Compile thumb : wiringPi <= pcf8591.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp3002.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp3004.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp4802.c | ||
+ | [armeabi] Compile thumb : wiringPi <= mcp3422.c | ||
+ | [armeabi] Compile thumb : wiringPi <= max31855.c | ||
+ | [armeabi] Compile thumb : wiringPi <= max5322.c | ||
+ | [armeabi] Compile thumb : wiringPi <= sn3218.c | ||
+ | [armeabi] SharedLibrary : libwiringPi.so | ||
+ | [armeabi] Install : libwiringPi.so => libs/armeabi/libwiringPi.so | ||
+ | [armeabi] Compile thumb : wiringPiDev <= ds1302.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= maxdetect.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= piNes.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= gertboard.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= piFace.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= lcd128x64.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= lcd.c | ||
+ | [armeabi] Compile thumb : wiringPiDev <= piGlow.c | ||
+ | [armeabi] SharedLibrary : libwiringPiDev.so | ||
+ | [armeabi] Install : libwiringPiDev.so => libs/armeabi/libwiringPiDev.so | ||
+ | [armeabi] Compile thumb : wpi_android <= wpi_android.c | ||
+ | [armeabi] SharedLibrary : libwpi_android.so | ||
+ | [armeabi] Install : libwpi_android.so => libs/armeabi/libwpi_android.so | ||
+ | </code> | ||
+ | |||
+ | 3. Import existing project to the eclipse IDE. | ||
+ | |||
+ | {{http://dn.odroid.com/Tinkering_Kit/Screenshot%20from%202015-04-10%2010:41:11.png?500|}} | ||
+ | |||
+ | 4. Run example-led | ||
+ | |||
+ | {{http://dn.odroid.com/Tinkering_Kit/device-2015-04-10-103856.png?600|}} | ||
+ | |||
+ | [[https://www.youtube.com/watch?v=zyfULOkj0Vw|]] | ||
+ | |||
+ | 5. Source code browsing! | ||
+ | |||
+ | **//Add below items in jni/Android.mk to build libwingPi.so and libwingPiDev.so//** | ||
+ | <code> | ||
+ | include $(CLEAR_VARS) | ||
+ | LOCAL_C_INCLUDES += \ | ||
+ | $(NDK_PATH)/platforms/android-21/arch-arm/usr/include \ | ||
+ | $(LOCAL_PATH)/wiringPi | ||
+ | |||
+ | LOCAL_MODULE := wiringPi | ||
+ | LOCAL_SRC_FILES := \ | ||
+ | wiringPi/wiringPi.c \ | ||
+ | wiringPi/wiringShift.c \ | ||
+ | wiringPi/piHiPri.c \ | ||
+ | wiringPi/piThread.c \ | ||
+ | wiringPi/wiringPiSPI.c \ | ||
+ | wiringPi/wiringPiI2C.c \ | ||
+ | wiringPi/softPwm.c \ | ||
+ | wiringPi/softTone.c \ | ||
+ | wiringPi/mcp23008.c \ | ||
+ | wiringPi/mcp23016.c \ | ||
+ | wiringPi/mcp23017.c \ | ||
+ | wiringPi/mcp23s08.c \ | ||
+ | wiringPi/mcp23s17.c \ | ||
+ | wiringPi/sr595.c \ | ||
+ | wiringPi/pcf8574.c \ | ||
+ | wiringPi/pcf8591.c \ | ||
+ | wiringPi/mcp3002.c \ | ||
+ | wiringPi/mcp3004.c \ | ||
+ | wiringPi/mcp4802.c \ | ||
+ | wiringPi/mcp3422.c \ | ||
+ | wiringPi/max31855.c \ | ||
+ | wiringPi/max5322.c \ | ||
+ | wiringPi/sn3218.c | ||
+ | |||
+ | LOCAL_CFLAGS += -UNDEBUG -DANDROID | ||
+ | |||
+ | LOCAL_LDLIBS := -ldl -llog | ||
+ | include $(BUILD_SHARED_LIBRARY) | ||
+ | |||
+ | |||
+ | include $(CLEAR_VARS) | ||
+ | LOCAL_C_INCLUDES += \ | ||
+ | $(NDK_PATH)/platforms/android-21/arch-arm/usr/include \ | ||
+ | $(LOCAL_PATH)/wiringPi | ||
+ | |||
+ | LOCAL_MODULE := wiringPiDev | ||
+ | LOCAL_SRC_FILES := \ | ||
+ | devLib/ds1302.c \ | ||
+ | devLib/maxdetect.c \ | ||
+ | devLib/piNes.c \ | ||
+ | devLib/gertboard.c \ | ||
+ | devLib/piFace.c \ | ||
+ | devLib/lcd128x64.c \ | ||
+ | devLib/lcd.c \ | ||
+ | devLib/piGlow.c | ||
+ | |||
+ | LOCAL_SHARED_LIBRARIES := libwiringPi | ||
+ | |||
+ | LOCAL_CFLAGS += -UNDEBUG | ||
+ | include $(BUILD_SHARED_LIBRARY) | ||
+ | </code> | ||
+ | |||
+ | //**Make some JNI API functions to access the wirinPi library.**// | ||
+ | <code> | ||
+ | jint Java_com_hardkernel_wiringpi_MainActivity_analogRead(JNIEnv* env, jobject obj, jint port) { | ||
+ | return analogRead(port); | ||
+ | } | ||
+ | |||
+ | void Java_com_hardkernel_wiringpi_MainActivity_digitalWrite(JNIEnv* env, jobject obj, jint port, jint onoff) { | ||
+ | digitalWrite(port, onoff); | ||
+ | } | ||
+ | |||
+ | int Java_com_hardkernel_wiringpi_MainActivity_wiringPiSetupSys(JNIEnv* env, jobject obj) { | ||
+ | wiringPiSetupSys(); | ||
+ | return 0; | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | //**Declare GPIO ports.**// | ||
+ | <code> | ||
+ | private final int ledPorts[] = { | ||
+ | 97, // GPIOX.BIT0(#97) | ||
+ | 108, // GPIOX.BIT11(#108) | ||
+ | 100, // GPIOX.BIT3(#100) | ||
+ | 101, // GPIOX.BIT4(#101) | ||
+ | 105, // GPIOX.BIT8(#105) | ||
+ | 106, // GPIOX.BIT9(#106) | ||
+ | 107, // GPIOX.BIT10(#107) | ||
+ | 115, // GPIOX.BIT18(#115) | ||
+ | 116, // GPIOX.BIT19(#116) | ||
+ | 88, // GPIOY.BIT8(#88) | ||
+ | 83, // GPIOY.BIT3(#83) | ||
+ | 87, // GPIOY.BIT7(#87) | ||
+ | 104, // GPIOX.BIT7(#104) | ||
+ | 102, // GPIOX.BIT5(#102) | ||
+ | 103, // GPIOX.BIT6(#103) | ||
+ | 117, // GPIOX.BIT20(#117) | ||
+ | 99, // GPIOX.BIT2(#99) | ||
+ | 118, // GPIOX.BIT21(#118) | ||
+ | 98, // GPIOX.BIT1(#98) | ||
+ | }; | ||
+ | </code> | ||
+ | |||
+ | //**Define JNI functions**// | ||
+ | <code> | ||
+ | public native int wiringPiSetupSys(); | ||
+ | public native int analogRead(int port); | ||
+ | public native void digitalWrite(int port, int onoff); | ||
+ | |||
+ | static { | ||
+ | System.loadLibrary("wpi_android"); | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | //**Generate GPIO access nodes**// | ||
+ | Make SYSFS GPIO access nodes with the /sys/class/gpio/export \\ | ||
+ | Change the GPIO pins to output mode via direction node.\\ Don't forget to change the permissions for those nodes. | ||
+ | |||
+ | <code> | ||
+ | boolean exportGPIO() { | ||
+ | try { | ||
+ | DataOutputStream os = new DataOutputStream(mProcess.getOutputStream()); | ||
+ | for (int port: ledPorts) { | ||
+ | os.writeBytes("echo " + port + " > /sys/class/gpio/export\n"); | ||
+ | os.writeBytes("chmod 666 /sys/class/gpio/gpio" + port + "/direction\n"); | ||
+ | os.writeBytes("echo out > /sys/class/gpio/gpio" + port + "/direction\n"); | ||
+ | os.writeBytes("chmod 666 /sys/class/gpio/gpio" + port + "/value\n"); | ||
+ | } | ||
+ | os.flush(); | ||
+ | } catch (IOException e1) { | ||
+ | // TODO Auto-generated catch block | ||
+ | e1.printStackTrace(); | ||
+ | return false; | ||
+ | } | ||
+ | |||
+ | return true; | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | Korean: wiringPi의 "/dev/mem"을 open 하여 mmap을 사용하는 방식으로 만들려고 하였으니 "/dev/mem"은 root가 아니면 접근을 제한하도록 되어 있어서 불가능합니다. | ||
+ | jni의 library에는 root 권한을 줄 방법이 없습니다. | ||
+ | |||
+ | English: It was impossible to access the /dev/mem in the Android platform because only root can access it. | ||
+ | There is no way to add a root permission to the JNI library. | ||
+ | |||
+ | |||
+ | //**Let's display and access the GPIO**// | ||
+ | |||
+ | This function runs every 100msec.\\ | ||
+ | It reads the ADC value and update the GUI as well as LED level meter.\\ | ||
+ | The CdS optical sensor is connected to the ADC.\\ | ||
+ | <code> | ||
+ | public void update() { | ||
+ | int i = 0; | ||
+ | int adcValue = 0; | ||
+ | int ledPos = 0; | ||
+ | if ((adcValue = analogRead (PORT_ADC1)) > 0) { | ||
+ | ledPos = (adcValue * ledPorts.length * 1000) / 1024; | ||
+ | ledPos = (ledPorts.length - (ledPos / 1000)); | ||
+ | mADC.setProgress(adcValue); | ||
+ | } else | ||
+ | ledPos = 0; | ||
+ | |||
+ | for (i = 0; i < ledPorts.length; i++) { | ||
+ | digitalWrite (ledPorts[i], 0); | ||
+ | mLeds.get(i).setChecked(false); | ||
+ | } | ||
+ | |||
+ | for (i = 0; i < ledPos; i++) { | ||
+ | digitalWrite (ledPorts[i], 1); | ||
+ | mLeds.get(i).setChecked(true); | ||
+ | } | ||
+ | |||
+ | if (!mStop) | ||
+ | handler.postDelayed(runnable, 100); | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | Note that wiringPiSetupSys() should be called once to initialize the wiringPi library. |