+ if (cur && !prev) { // --- just pressed ---
+ button_start[2] = jiffies;
+ } else if (!cur && prev) { // --- just released ---
+ button_start[2] = jiffies;
+ } else { // --- no change ---
+ uint16_t duration = jiffies - button_start[2];
+
+ if (duration > 6) {
+ if (cur) {
+ if (button_state.brake_working
+ && !button_state.brake_reported) {
+ button_state.brake_reported = 1;
+ brake_on();
+ }
+ } else {
+ button_state.brake_working = 1;
+ if (button_state.brake_reported) {
+ button_state.brake_reported = 0;
+ brake_off();
+ }
+ }
+ button_start[2] = jiffies - 7; // avoid overflow
+ }
+ }
+}