From 01124fd1d994f3ccd9db27ccd5fbbe65af4d04e0 Mon Sep 17 00:00:00 2001
From: John Janus <mail@johnzone.org>
Date: Fri, 6 Oct 2017 11:03:25 +0200
Subject: [PATCH] implement unprelling in code

---
 simple_try.c | 38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/simple_try.c b/simple_try.c
index 528b643..fdfaa6b 100644
--- a/simple_try.c
+++ b/simple_try.c
@@ -19,6 +19,8 @@
 #define INTROBTN 13
 #define HORNBTN 11
 
+#define UNPRELL 200
+
 volatile bool running = true;
 static volatile bool pwrOn = false;
 static volatile bool chnl1 = true;
@@ -43,8 +45,12 @@ void ctrlCHandler(int signum) {
 void pwrBtn(void) {
     if (delaying) return;
     pthread_mutex_lock(mut);
-    pwrOn = !pwrOn;
-    if (pwrOn) intro = false;
+    int pwrstate = digitalRead(PWRBTN);
+    delay(UNPRELL);
+    if (pwrstate==digitalRead(PWRBTN)) {
+        pwrOn = !pwrOn;
+        if (pwrOn) intro = false;
+    }
     pthread_mutex_unlock(mut);
     pthread_cond_signal(wakeup);
 }
@@ -52,7 +58,11 @@ void pwrBtn(void) {
 void chnl1Btn(void) {
     if (delaying || !pwrOn) return;
     pthread_mutex_lock(mut);
-    chnl1 = true;
+    int chnl1state = digitalRead(CHNL1BTN);
+    delay(UNPRELL);
+    if (chnl1state==digitalRead(CHNL1BTN)) {
+        chnl1 = true;
+    }
     pthread_mutex_unlock(mut);
     pthread_cond_signal(wakeup);
 }
@@ -60,7 +70,11 @@ void chnl1Btn(void) {
 void chnl2Btn(void) {
     if (delaying || !pwrOn) return;
     pthread_mutex_lock(mut);
-    chnl1 = false;
+    int chnl2state = digitalRead(CHNL2BTN);
+    delay(UNPRELL);
+    if (chnl2state==digitalRead(CHNL2BTN)) {
+        chnl1 = false;
+    }
     pthread_mutex_unlock(mut);
     pthread_cond_signal(wakeup);
 }
@@ -68,8 +82,12 @@ void chnl2Btn(void) {
 void introBtn(void) {
     if (delaying || pwrOn) return;
     pthread_mutex_lock(mut);
-    intro = !intro;
-    horn = false;
+    int introstate = digitalRead(INTROBTN);
+    delay(UNPRELL);
+    if (introstate==digitalRead(INTROBTN)) {
+        intro = !intro;
+        horn = false;
+    }
     pthread_mutex_unlock(mut);
     pthread_cond_signal(wakeup);
 }
@@ -77,8 +95,12 @@ void introBtn(void) {
 void hornBtn(void) {
     if (delaying || pwrOn) return;
     pthread_mutex_lock(mut);
-    horn = !horn;
-    intro = false;
+    int hornstate = digitalRead(HORNBTN);
+    delay(UNPRELL);
+    if (hornstate==digitalRead(HORNBTN)) {
+        horn = !horn;
+        intro = false;
+    }
     pthread_mutex_unlock(mut);
     pthread_cond_signal(wakeup);
 }
-- 
2.47.0