diff --git a/APP_Framework/Applications/knowing_app/Kconfig b/APP_Framework/Applications/knowing_app/Kconfig
index 8e0305b6..bb8cfa0d 100755
--- a/APP_Framework/Applications/knowing_app/Kconfig
+++ b/APP_Framework/Applications/knowing_app/Kconfig
@@ -3,4 +3,5 @@ menu "knowing app"
     source "$APP_DIR/Applications/knowing_app/face_detect/Kconfig" 
     source "$APP_DIR/Applications/knowing_app/instrusion_detect/Kconfig" 
     source "$APP_DIR/Applications/knowing_app/helmet_detect/Kconfig" 
+    source "$APP_DIR/Applications/knowing_app/iris_ml_demo/Kconfig" 
 endmenu
diff --git a/APP_Framework/Applications/knowing_app/iris_ml_demo/Kconfig b/APP_Framework/Applications/knowing_app/iris_ml_demo/Kconfig
new file mode 100644
index 00000000..ef278670
--- /dev/null
+++ b/APP_Framework/Applications/knowing_app/iris_ml_demo/Kconfig
@@ -0,0 +1,3 @@
+config IRIS_ML_DEMO
+    bool "enable apps/iris ml demo"
+    default n
diff --git a/APP_Framework/Applications/knowing_app/iris_ml_demo/SConscript b/APP_Framework/Applications/knowing_app/iris_ml_demo/SConscript
new file mode 100644
index 00000000..ef62e745
--- /dev/null
+++ b/APP_Framework/Applications/knowing_app/iris_ml_demo/SConscript
@@ -0,0 +1,9 @@
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd]
+
+group = DefineGroup('Applications', src, depend = ['IRIS_ML_DEMO'], LOCAL_CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/APP_Framework/Applications/knowing_app/iris_ml_demo/SVCModel.h b/APP_Framework/Applications/knowing_app/iris_ml_demo/SVCModel.h
new file mode 100644
index 00000000..6bf3e1a3
--- /dev/null
+++ b/APP_Framework/Applications/knowing_app/iris_ml_demo/SVCModel.h
@@ -0,0 +1,78 @@
+/**
+ * SVC model trained by iris dataset
+ */
+#include <stdarg.h>
+
+/**
+ * Compute kernel between feature vector and support vector.
+ * Kernel type: linear
+ */
+float compute_kernel(float *x, ...)
+{
+    va_list w;
+    va_start(w, 4);
+    float kernel = 0.0;
+
+    for (int i = 0; i < 4; i++) {
+        kernel += x[i] * va_arg(w, double);
+    }
+
+    return kernel;
+}
+
+/**
+ * Predict class for features vector
+ */
+int predict(float *x)
+{
+    float kernels[27] = {0};
+    float decisions[3] = {0};
+    int votes[3] = {0};
+    kernels[0] = compute_kernel(x, 5.1, 3.3, 1.7, 0.5);
+    kernels[1] = compute_kernel(x, 4.8, 3.4, 1.9, 0.2);
+    kernels[2] = compute_kernel(x, 4.5, 2.3, 1.3, 0.3);
+    kernels[3] = compute_kernel(x, 6.9, 3.1, 4.9, 1.5);
+    kernels[4] = compute_kernel(x, 6.3, 3.3, 4.7, 1.6);
+    kernels[5] = compute_kernel(x, 6.1, 2.9, 4.7, 1.4);
+    kernels[6] = compute_kernel(x, 5.6, 3.0, 4.5, 1.5);
+    kernels[7] = compute_kernel(x, 6.2, 2.2, 4.5, 1.5);
+    kernels[8] = compute_kernel(x, 5.9, 3.2, 4.8, 1.8);
+    kernels[9] = compute_kernel(x, 6.3, 2.5, 4.9, 1.5);
+    kernels[10] = compute_kernel(x, 6.8, 2.8, 4.8, 1.4);
+    kernels[11] = compute_kernel(x, 6.7, 3.0, 5.0, 1.7);
+    kernels[12] = compute_kernel(x, 6.0, 2.7, 5.1, 1.6);
+    kernels[13] = compute_kernel(x, 5.4, 3.0, 4.5, 1.5);
+    kernels[14] = compute_kernel(x, 5.1, 2.5, 3.0, 1.1);
+    kernels[15] = compute_kernel(x, 4.9, 2.5, 4.5, 1.7);
+    kernels[16] = compute_kernel(x, 6.5, 3.2, 5.1, 2.0);
+    kernels[17] = compute_kernel(x, 6.0, 2.2, 5.0, 1.5);
+    kernels[18] = compute_kernel(x, 6.3, 2.7, 4.9, 1.8);
+    kernels[19] = compute_kernel(x, 6.2, 2.8, 4.8, 1.8);
+    kernels[20] = compute_kernel(x, 6.1, 3.0, 4.9, 1.8);
+    kernels[21] = compute_kernel(x, 7.2, 3.0, 5.8, 1.6);
+    kernels[22] = compute_kernel(x, 6.3, 2.8, 5.1, 1.5);
+    kernels[23] = compute_kernel(x, 6.0, 3.0, 4.8, 1.8);
+    kernels[24] = compute_kernel(x, 6.3, 2.5, 5.0, 1.9);
+    kernels[25] = compute_kernel(x, 6.5, 3.0, 5.2, 2.0);
+    kernels[26] = compute_kernel(x, 5.9, 3.0, 5.1, 1.8);
+    decisions[0] = 1.452844496978 + kernels[0] * 0.67075289031 + kernels[2] * 0.077097563476 + kernels[14] * -0.747850453786;
+    decisions[1] = 1.507713125178 + kernels[0] * 0.043820415076 + kernels[1] * 0.159872086718 + kernels[15] * -0.203692501794;
+    decisions[2] = 6.78097118511 + kernels[3] + kernels[4] + kernels[5] + kernels[6] + kernels[7] + kernels[8] + kernels[9] +
+                   kernels[10] * 0.243261886421 + kernels[11] + kernels[12] + kernels[13] - kernels[15] - kernels[16] -
+                   kernels[17] - kernels[18] - kernels[19] - kernels[20] + kernels[21] * -0.437859817863 - kernels[22] -
+                   kernels[23] + kernels[24] * -0.645105347981 + kernels[25] * -0.160296720576 - kernels[26];
+    votes[decisions[0] > 0 ? 0 : 1] += 1;
+    votes[decisions[1] > 0 ? 0 : 2] += 1;
+    votes[decisions[2] > 0 ? 1 : 2] += 1;
+    int val = votes[0];
+    int idx = 0;
+
+    for (int i = 1; i < 3; i++) {
+        if (votes[i] > val) {
+            val = votes[i];
+            idx = i;
+        }
+    }
+
+    return idx;
+}
diff --git a/APP_Framework/Applications/knowing_app/iris_ml_demo/iris.csv b/APP_Framework/Applications/knowing_app/iris_ml_demo/iris.csv
new file mode 100644
index 00000000..3852bddd
--- /dev/null
+++ b/APP_Framework/Applications/knowing_app/iris_ml_demo/iris.csv
@@ -0,0 +1,7 @@
+5.1,3.5,1.4,0.2
+6.4,3.2,4.5,1.5
+5.8,2.7,5.1,1.9
+7.7,3.8,6.7,2.2
+5.5,2.6,4.4,1.2
+5.1,3.8,1.9,0.4
+5.8,2.7,3.9,1.2
\ No newline at end of file
diff --git a/APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c b/APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c
new file mode 100644
index 00000000..0e3eca40
--- /dev/null
+++ b/APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c
@@ -0,0 +1,59 @@
+#include <string.h>
+#include <transform.h>
+
+#include "SVCModel.h"
+
+#define FEATURE_NUM 4
+#define CSV_PATH "/csv/iris.csv"
+#define CSV_BUFFER_SIZE (1 * 1024)
+
+static float data[10][FEATURE_NUM] = {};
+static int data_len = 0;
+
+void simple_CSV_read()
+{
+    int fin;
+    int col = 0;
+    char buffer[CSV_BUFFER_SIZE] = "";
+    char *tmp = "";
+    char *delim = ",\n ";
+
+    fin = open(CSV_PATH, O_RDONLY);
+    if (!fin) {
+        printf("Error open file %s", CSV_PATH);
+        exit(-1);
+    }
+    read(fin, buffer, sizeof(buffer));
+    close(fin);
+
+    data_len = 0;
+    for (tmp = strtok(buffer, delim); tmp && *tmp; col++, tmp = strtok(NULL, delim)) {
+        if (0 == col % FEATURE_NUM) {
+            // printf("\n");
+            data_len++;
+            col = 0;
+        }
+        data[data_len - 1][col] = atof(tmp);
+        // printf("%.4f ", data[data_len - 1][col]);
+    }
+    // printf("\n");
+}
+
+void iris_SVC_predict()
+{
+    int result;
+
+    simple_CSV_read();
+
+    for (int i = 0; i < data_len; i++) {
+        result = predict(data[i]);
+        printf("data %d: ", i + 1);
+        for (int j = 0; j < FEATURE_NUM; j++) {
+            printf("%.4f ", data[i][j]);
+        }
+        printf("result: %d\n", result);
+    }
+}
+#ifdef __RT_THREAD_H__
+MSH_CMD_EXPORT(iris_SVC_predict, iris predict by SVC);
+#endif
diff --git a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.config b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.config
index 9ce8277a..f4caa0c5 100644
--- a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.config
+++ b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.config
@@ -356,6 +356,7 @@ CONFIG_MAIN_KTASK_STACK_SIZE=1024
 #
 # knowing app
 #
+CONFIG_IRIS_ML_DEMO=y
 
 #
 # sensor app
@@ -378,10 +379,13 @@ CONFIG_SUPPORT_SENSOR_FRAMEWORK=y
 # CONFIG_SUPPORT_CONNECTION_FRAMEWORK is not set
 CONFIG_SUPPORT_KNOWING_FRAMEWORK=y
 # CONFIG_USING_TENSORFLOWLITEMICRO is not set
+CONFIG_USING_KPU_POSTPROCESSING=y
+# CONFIG_USING_YOLOV2 is not set
 # CONFIG_SUPPORT_CONTROL_FRAMEWORK is not set
 
 #
-# app lib
+# lib
 #
 CONFIG_APP_SELECT_NEWLIB=y
 # CONFIG_APP_SELECT_OTHER_LIB is not set
+# CONFIG_LIB_USING_CJSON is not set
diff --git a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.gitignore b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.gitignore
index 3495bbcc..331082a3 100644
--- a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.gitignore
+++ b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/.gitignore
@@ -1,30 +1,19 @@
-*.pyc
+# this
 *.map
 *.dblite
-*.elf
 *.bin
-*.hex
 *.axf
-*.exe
-*.pdb
-*.idb
-*.ilk
 *.old
 *~
 *.o
-*.obj
-*.out
 *.bak
 *.dep
-*.lib
 *.i
 *.d
-.DS_Stor*
 *.uimg
 GPATH
 GRTAGS
 GTAGS
-.vscode
 JLinkLog.txt
 JLinkSettings.ini
 DebugConfig/
@@ -32,3 +21,223 @@ RTE/
 settings/
 *.uvguix*
 cconfig.h
+
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.con
diff --git a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.h b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.h
index 65885fbe..4dfc486d 100644
--- a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.h
+++ b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.h
@@ -201,6 +201,8 @@
 
 /* knowing app */
 
+#define IRIS_ML_DEMO
+
 /* sensor app */
 
 
@@ -210,8 +212,9 @@
 #define ADD_XIUOS_FETURES
 #define SUPPORT_SENSOR_FRAMEWORK
 #define SUPPORT_KNOWING_FRAMEWORK
+#define USING_KPU_POSTPROCESSING
 
-/* app lib */
+/* lib */
 
 #define APP_SELECT_NEWLIB
 
diff --git a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.py b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.py
index 5ecc68cf..1e094c54 100644
--- a/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.py
+++ b/Ubiquitous/RT_Thread/bsp/stm32f407-atk-coreboard/rtconfig.py
@@ -17,7 +17,7 @@ if os.getenv('RTT_ROOT'):
 # EXEC_PATH is the compiler execute path, for example, CodeSourcery, Keil MDK, IAR
 if  CROSS_TOOL == 'gcc':
     PLATFORM    = 'gcc'
-    EXEC_PATH   = r'/usr/local/Cellar/gcc-arm-none-eabi/20180627/bin'
+    EXEC_PATH   = r'/opt/gcc-arm-none-eabi-7-2018-q2-update/bin'
 elif CROSS_TOOL == 'keil':
     PLATFORM    = 'armcc'
     EXEC_PATH   = r'C:/Keil_v5'