Posts on Arun PM

Rust: Programming language for safety and speed

Wed, 07 Feb 2024 00:00:00 +0000

Introduction

Rust is a non-garbage collected, compiled systems programming language with strong typing. It began as a personal project by a Mozilla research employee in 2006, and later, Mozilla started sponsoring the project in 2009. Eventually, Mozilla adopted Rust for Firefox and rewrote the core in Rust in 2017. Rust is an advanced language with numerous features that developers appreciate. Positioned as a compelling alternative to C/C++, Rust offers robust capabilities for system-level programming.

Python Dependency Management: pip and poetry

Mon, 27 Nov 2023 00:00:00 +0000

Install package using pip

python3 -m pip install iotcore

Show package details using pip

python3 -m pip show iotcore

Uninstall package using pip

python3 -m pip uninstall iotcore

List installed packages using pip

python3 -m pip list

Upgrade a package using pip

python3 -m pip install --upgrade iotcore
# or
python3 -m pip install -U iotcore

New python project using poetry

poetry new poeetry_demo

Install new package using poetry

poetry add arrow

Show installed packages using poetry

Refresh C Programming

Sat, 11 Nov 2023 00:00:00 +0000

Convert void data-type (byte array) to uint8_t type

static uint8_t notify_func(const void *data)
{
 uint8_t value = ((uint8_t *)data)[7];
 return value;
}

Structure data-type as function arguments

static uint8_t notify_func(struct bt_gatt_subscribe_params *params)
{
 printk("value_handle : %d", params->value_handle)
}

Declare enums as types

typedef enum {
 STRING,
 NUMBERS,
 COMPLEX,
 DATATYPE_COUNT,
 INVALID_SENSOR
} sensor_datatype_t;

String initialisation to char pointer


const char *p_mac_addr = "0C:8C:DC:41:E1:EF";

static void print_mac_addr(void)
{
 printk("p_mac_addr : %s\n", p_mac_addr)
}

String as function return values

char* get_sensor_mac_addr(void){
 return p_mac_addr;
}

Parse unsigned int from byte array pointer