ODroid as raplacement for Raspberry Pi

#include <stdint.h>
#include "arm_gic.h" // Include the appropriate GIC (Generic Interrupt Controller) file for your specific ARM CPU

#define GPIO_PIN_NUM 10 // The number of the GPIO pin to toggle
#define TIMER_INTERRUPT_ID 30 // The ID of the timer interrupt to use
#define CLOCK_FREQ_MHZ 100 // The frequency of the clock in MHz
#define STEPS_PER_MM 10 // Number of pulses to travel one millimeter
#define STEPS_PER_INCH 25.4 * STEPS_PER_MM // Number of pulses to travel one inch

enum MeasurementSystem {
    MEASUREMENT_SYSTEM_MM,
    MEASUREMENT_SYSTEM_INCH,
};

volatile uint32_t tick_count = 0;
volatile uint32_t step_length = 1; // The duration of the pulse in microseconds
volatile uint32_t pulse_count = 0; // The number of clock cycles the pulse has been active for
volatile enum MeasurementSystem measurement_system = MEASUREMENT_SYSTEM_MM;

void timer_interrupt_handler(void) {
    tick_count++; // Increment tick count on every timer interrupt
    if (pulse_count > 0) {
        // Turn off the GPIO pin if the pulse duration has been reached
        if (pulse_count == (CLOCK_FREQ_MHZ * step_length)) {
            set_gpio_pin_state(GPIO_PIN_NUM, 0);
            pulse_count = 0;
        } else {
            // Toggle the GPIO pin if the pulse is still active
            toggle_gpio_pin(GPIO_PIN_NUM);
            pulse_count++;
        }
    }
    // Clear the interrupt flag in the GIC
    arm_gic_clear_interrupt(TIMER_INTERRUPT_ID);
}

void set_step_length(uint32_t length_us) {
    step_length = length_us;
}

double convert_speed_to_pulse_freq(double speed) {
    double steps_per_device_unit;
    if (measurement_system == MEASUREMENT_SYSTEM_MM) {
        steps_per_device_unit = STEPS_PER_MM;
    } else {
        steps_per_device_unit = STEPS_PER_INCH;
    }
    double pulse_freq = (speed / steps_per_device_unit) * CLOCK_FREQ_MHZ;
    return pulse_freq;
}

int main(void) {
    // Initialize system clock and peripherals
    // Note: the exact initialization code will depend on your specific ARM CPU and board
    
    // Configure the GPIO pin as an output
    configure_gpio_pin_output(GPIO_PIN_NUM);
    
    // Configure the timer interrupt
    arm_gic_configure_interrupt(TIMER_INTERRUPT_ID, ARM_GIC_PRIORITY_MEDIUM, timer_interrupt_handler);
    // Enable the timer interrupt
    arm_gic_enable_interrupt(TIMER_INTERRUPT_ID);
    
    while (1) {
        // Your main program code here
        // Call set_step_length to change the step length setting in real-time
        // Call trigger_pulse to start a new pulse
    }
}

void trigger_pulse(void) {
    pulse_count = 1;
    set_gpio_pin_state(GPIO_PIN_NUM, 1);
}