+ uint16_t duration;
+
+ if (cur && !prev) { // --- just pressed ---
+ button_start[2] = jiffies;
+ return;
+ } else if (!cur && prev) { // --- just released ---
+ button_start[2] = jiffies;
+ return;
+ }
+ // --- no change ---
+ duration = jiffies - button_start[2];
+
+ if (duration <= 3)
+ return;
+
+ if (cur) {
+ if (button_state.brake_working) {
+ static unsigned int brake_time;
+ if (button_state.brake_reported) {
+ if (brake_time) {
+ brake_time--;
+ } else {
+ brake_off();
+ button_state.brake_working = 0;
+ button_state.brake_reported = 0;
+ }
+ } else {
+ button_state.brake_reported = 1;
+ brake_on();
+ brake_time = 255; // avoid longer than ~16s
+ }
+ }
+ } else {
+ button_state.brake_working = 1;
+ if (button_state.brake_reported) {
+ button_state.brake_reported = 0;
+ brake_off();
+ }
+ }