examples/imagimob: Adding imagimob mp integration.

Signed-off-by: NikhitaR-IFX <Nikhita.Rajasekhar@infineon.com>

examples/imagimob/README.md

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+# MicroPython ImagiMob Integration for Infineon's PSoC6 port
+
+This directory contains the imagimob generated model files and the interface for it's enablement in micropython. To access your edge ai models developed for PSoC6 based kit from a micropython application, please follow the description below.
+
+## Folder structure
+
+**model.c** : Imagimob generated source code in C for your developed model in the studio.
+
+**model.h** : Imagimob generated source code in C for your developed model in the studio.
+
+**imai_mp_iface.c** : MicroPython interface for ImagiMob models.
+
+**micropython.mk** : Makefile configurations for firmware generation.
+
+## Installation
+
+Please check for the pre-requisites mentioned [here](../../ports/psoc6/README.md#Pre-requisites).
+
+## Usage
+
+Follow the steps below to generate micropython bindings for your imagimob generated model.
+
+1. The imagimob micropytthon integration is available in imai-mp-integration, so checkout to that branch after cloning this repository.
+
+        git clone https://github.com/Infineon/micropython.git
+
+        git checkout --track origin/imai-mp-integration
+
+2. Then initialize the ModusToolbox™ environment: 
+
+        make mtb_init BOARD=<board-name>
+
+3. Retrieve submodules:
+
+        make submodules
+
+4. In the examples/imagimob/ folder, replace the **model.c** and **model.h** files by your imagimob generated model files.
+
+5. Compile it alongwith psoc6 port source code and generate the final .hex to be flashed into your device. From your root:
+
+        cd ports/psoc6
+        
+        make program
+
+# Run micropython
+
+Use any micropython supported IDE (like Thonny) and establish a session with your device. Now you should be able to import your model as shown below:
+
+    import imai as model
+
+    model.init() # Initialize the model
+
+    model.enqueue(data_in) # Send the data inputs for the model
+
+    model.dequeue(data_out) # Get the classifications
+
+**Note**: Above is only an abstract code to show the usage in micropython. Please take care of populating the data-in and data_out with right dimensions and values. The provided api's abide by its operation in imagimob. Please refer to API documentation [here](https://developer.imagimob.com/edge-optimization/edge-api). 

examples/imagimob/imai_mp_iface.c

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+// Include MicroPython API.
+#include "py/runtime.h"
+
+#include "py/mphal.h"
+#include "model.h"
+
+static mp_obj_t init(void){
+    IMAI_init();
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_0(init_obj, init);
+
+static mp_obj_t enqueue(const mp_obj_t data_in_obj){
+    float data_in[IMAI_DATA_IN_COUNT];
+    mp_obj_t *data_in_items;
+    size_t len;
+    mp_obj_get_array(data_in_obj, &len, &data_in_items);
+    if (len != IMAI_DATA_IN_COUNT) {
+        mp_raise_ValueError("data_in must be a list of IMAI_DATA_IN_COUNT floats");
+    }
+    for (int i = 0; i < IMAI_DATA_IN_COUNT; i++) {
+        data_in[i] = mp_obj_float_get(data_in_items[i]);
+    }
+    int result = IMAI_enqueue(data_in);
+    return MP_OBJ_NEW_SMALL_INT(result);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(enqueue_obj, enqueue);
+
+static mp_obj_t dequeue(mp_obj_t data_out_obj) {
+    mp_buffer_info_t buf_info;
+    mp_get_buffer(data_out_obj, &buf_info, MP_BUFFER_WRITE);
+    float *data_out = (float *)buf_info.buf;
+    int result = IMAI_dequeue(data_out);
+    if (result == 0) {
+        return MP_OBJ_NEW_SMALL_INT(result);
+    } else if (result == -1) {
+        mp_printf(&mp_plat_print, "No data is currently available\n");
+        return MP_OBJ_NEW_SMALL_INT(result);
+    } else if (result == -2) {
+        mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("Internal memory allocation error"), result);
+    }
+    return MP_OBJ_NEW_SMALL_INT(result);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(dequeue_obj, dequeue);
+
+static const mp_rom_map_elem_t example_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_imai) },
+
+    // imagimob fns
+    { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&init_obj) },
+    { MP_ROM_QSTR(MP_QSTR_enqueue), MP_ROM_PTR(&enqueue_obj) },
+    { MP_ROM_QSTR(MP_QSTR_dequeue), MP_ROM_PTR(&dequeue_obj) },
+
+    // constants
+    { MP_ROM_QSTR(MP_QSTR_DATA_IN),                      MP_ROM_INT(IMAI_DATA_IN_COUNT) },
+    { MP_ROM_QSTR(MP_QSTR_DATA_OUT),                     MP_ROM_INT(IMAI_DATA_OUT_COUNT) },
+};
+static MP_DEFINE_CONST_DICT(example_module_globals, example_module_globals_table);
+
+// Define module object.
+const mp_obj_module_t imai_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t *)&example_module_globals,
+};
+
+// Register the module to make it available in Python.
+#if MICROPY_PY_IMAI
+MP_REGISTER_MODULE(MP_QSTR_imai, imai_module);
+#endif

examples/imagimob/micropython.mk

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+IMAI_MOD_DIR := $(USERMOD_DIR)
+
+# Add all C files to SRC_USERMOD.
+SRC_USERMOD += $(IMAI_MOD_DIR)/imai_mp_iface.c $(IMAI_MOD_DIR)/model.c
+
+# We can add our module folder to include paths if needed
+# This is not actually needed in this example.
+CFLAGS_USERMOD += -I$(IMAI_MOD_DIR)