#include "stm32_unict_lib.h"
#include <stdio.h>

int new_arr_value = 100;

void setup(void)
{
    DISPLAY_init();
    GPIO_init(GPIOB);
    GPIO_config_output(GPIOB, 0);

    ADC_init(ADC1, ADC_RES_8, ADC_ALIGN_RIGHT);
    ADC_channel_config(ADC1, GPIOC, 0, 10);
    ADC_on(ADC1);
    ADC_sample_channel(ADC1, 10);

    TIM_init(TIM2);
    TIM_config_timebase(TIM2, 42000, 100);
    TIM_set(TIM2, 0);
    TIM_enable_irq(TIM2, IRQ_UPDATE);
    TIM_on(TIM2);
}

 void loop(void)
{
     ADC_start(ADC1);
     while (!ADC_completed(ADC1)) {}
     int value = ADC_read(ADC1);
     new_arr_value = value * 900.0/255 + 100;
     char s[5];
     sprintf(s, "%4d", new_arr_value / 2); // we will display the milliseconds
     DISPLAY_puts(0,s);
}

 void TIM2_IRQHandler(void)
 {
     if (TIM_update_check(TIM2)) {
         GPIO_toggle(GPIOB, 0);
         TIM_update_clear(TIM2);
         TIM2->ARR = new_arr_value;
         // update the autoreload register with new value
     }
 }


int main()
{
	setup();
	for(;;) {
		loop();
	}
	return 0;
}