61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
#include "mgos.h"
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#include "mgos_gpio.h"
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#include "mgos_timers.h"
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#include "buttonHandler.h"
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#define ON_BOARD_BUTTON_PIN 5
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#define MAX_TIME_BETWEEN_MULTIPLE_BUTTON_PRESS_EVENTS 200
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static double lastButtonPressTime = 0;
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static uint8_t buttonPressCounter = 0;
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static mgos_timer_id multiPressTimerId = 0;
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static uint8_t callbacksRegistered = 0;
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#define MAX_CALLBACKS 10
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struct callbackReg_s {
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int numberPressed;
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button_press_callback callback;
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};
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static struct callbackReg_s callbacks[MAX_CALLBACKS];
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void add_button_press_callback(int numberPressed, button_press_callback cb) {
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if (callbacksRegistered < MAX_CALLBACKS) {
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callbacks[callbacksRegistered].callback = cb;
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callbacks[callbacksRegistered].numberPressed = numberPressed;
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++callbacksRegistered;
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} else {
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LOG(LL_ERROR, ("ERROR: Too many callbacks for button press! -- ignored this on for %d presses", numberPressed));
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}
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}
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static void multiPressButtonHandler(void *arg) {
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(void) arg;
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LOG(LL_DEBUG, ("multiPressButtonHandler called after %d presses", buttonPressCounter));
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multiPressTimerId = 0; // timer used only once, thus we clear it
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for (int i=0; i<callbacksRegistered; ++i) {
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if (callbacks[i].numberPressed == buttonPressCounter) {
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LOG(LL_DEBUG, ("Calling button press callback for %d presses, index %d", buttonPressCounter, i));
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callbacks[i].callback(buttonPressCounter);
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}
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}
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}
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static void buttonHandler(int pin, void *arg) {
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(void) pin;
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(void) arg;
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// button release event occured
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if (mgos_uptime() - lastButtonPressTime < MAX_TIME_BETWEEN_MULTIPLE_BUTTON_PRESS_EVENTS) {
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++buttonPressCounter;
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} else {
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buttonPressCounter = 0;
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}
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lastButtonPressTime = mgos_uptime();
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// at this point we do not know if more press events will come that we need to count, therefore we wait before we act
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if (multiPressTimerId != 0) mgos_clear_timer(multiPressTimerId);
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multiPressTimerId = mgos_set_timer(MAX_TIME_BETWEEN_MULTIPLE_BUTTON_PRESS_EVENTS + 1, 0, multiPressButtonHandler, NULL);
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}
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void init_button_handler() {
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mgos_gpio_set_button_handler(ON_BOARD_BUTTON_PIN, MGOS_GPIO_PULL_UP, MGOS_GPIO_INT_EDGE_POS, 50, buttonHandler, NULL);
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} |