Differences Between STM32, Arduino, and Raspberry Pi Development

// Assume the LED is connected to GPIOA's Pin5#define LED_PIN GPIO_PIN_5#define LED_PORT GPIOA
// GPIO initialization function (generated by STM32CubeMX)void MX_GPIO_Init(void){    GPIO_InitTypeDef GPIO_InitStruct = {0};
    // Enable clock for GPIOA    __HAL_RCC_GPIOA_CLK_ENABLE();
    // Configure GPIOA Pin5 as output mode    GPIO_InitStruct.Pin = LED_PIN;    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;    GPIO_InitStruct.Pull = GPIO_NOPULL;    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;    HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);}
int main(void){    // HAL library initialization    HAL_Init();    // Configure system clock    SystemClock_Config();    // Initialize all configured peripherals    MX_GPIO_Init();
    while (1)    {        // Turn on LED        HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);        // Delay 500 milliseconds        HAL_Delay(500);        // Turn off LED        HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);        // Delay 500 milliseconds        HAL_Delay(500);    }}

// Assume the LED is connected to pin 13const int ledPin = 13;
void setup() {  // Initialize digital pin as output  pinMode(ledPin, OUTPUT);}
void loop() {  // Turn on LED  digitalWrite(ledPin, HIGH);  // Delay 500 milliseconds  delay(500);  // Turn off LED          digitalWrite(ledPin, LOW);  // Delay 500 milliseconds  delay(500);}

import RPi.GPIO as GPIOimport time
# Use BCM GPIO numberingGPIO.setmode(GPIO.BCM)# Assume the LED is connected to GPIO17LED_PIN = 17
# Set GPIO pin as output modeGPIO.setup(LED_PIN, GPIO.OUT)
try:    while True:        # Turn on LED        GPIO.output(LED_PIN, GPIO.HIGH)        # Delay 500 milliseconds        time.sleep(0.5)        # Turn off LED        GPIO.output(LED_PIN, GPIO.LOW)        # Delay 500 milliseconds        time.sleep(0.5)except KeyboardInterrupt:    # Catch Ctrl+C to clean up GPIO settings    passfinally:    # Clean up all GPIO settings    GPIO.cleanup()