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/*
* local_control.c
* Code related to the local control mode
*
* Created on: Nov 4, 2025
* Author: sowgro
*/
#include <stm32l4xx.h>
#include <stdio.h>
#include <stdint.h>
#include "GPIO.h"
#include "project.h"
int click_count = 0;
uint32_t last_press = 0;
uint32_t time_down = 0;
int hold_pending = 0;
/**
* Initialize local control mode (does not enable it)
*/
void local_control_init() {
GPIO_Init();
NVIC_EnableIRQ(EXTI9_5_IRQn);
}
/**
* Logic that should be called constantly from the main loop.
*/
void local_control_loop() {
uint32_t now = systick_get_count();
if (hold_pending) {
hold_pending = 0;
printf("Hold click action\r\n");
}
if (now - last_press > 10000) {
last_press = 0;
switch(click_count) {
case 1:
printf("Single click action\r\n"); break;
case 2:
printf("Double click action\r\n"); break;
}
click_count = 0;
}
}
/**
* Handles external button press
*/
void EXTI9_5_IRQHandler() {
static int prevStatus = -1;
if (~EXTI->PR1 & EXTI_PR1_PIF9)
return;
EXTI->PR1 |= EXTI_PR1_PIF9;
if (project_get_mode() != LOCAL_MODE)
return;
int status = !!(GPIOA->IDR & GPIO_PIN_9);
if (prevStatus == status)
return;
prevStatus = status;
handle_press(status);
}
/**
* Logs button information
*/
void handle_press(int pressed) {
uint32_t now = systick_get_count();
if (pressed) {
time_down = now;
} else {
// printf("now: %i, time_down: %i diff: %i\r\n", now, time_down, now - time_down);
if (/*(now - time_down) < 10 ||*/ !time_down) {
printf("ignored\r\n");
// printf("now: %i, time_down: %i diff: %i\r\n", now, time_down, now - time_down);
} else if ((now - time_down) < 10000) {
// printf("SHORT PRESS\r\n");
time_down = 0;
last_press = now;
click_count++;
} else {
// printf("LONG PRESS\r\n");
hold_pending = 1;
time_down = 0;
}
}
}
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