From a9679f6210fad1b1d8b05529dd6f4443c633365b Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Thu, 1 Nov 2018 12:29:14 +0100
Subject: probe SENSE_PIN

---
 anzeige.c     |  5 +++++
 multiplexer.c | 70 +++++++++++++++++++++++++++++++++++++++++++----------------
 multiplexer.h |  4 +++-
 3 files changed, 59 insertions(+), 20 deletions(-)

diff --git a/anzeige.c b/anzeige.c
index 36465a3..8f5953a 100644
--- a/anzeige.c
+++ b/anzeige.c
@@ -70,10 +70,15 @@ int main(int argc, char **argv)
   }
 
   time_t next_update = 0;
+  scroll_data . shine_until = time(NULL) + 10;
 
   int i=0;
 
   while (scroll_data . keep_running) {
+    if (got_input()) {
+      next_update = 0; // update now!
+      scroll_data . shine_until = time(NULL) + 60;
+    }
     if ((time(NULL) >= next_update) && (scroll_data . update == 0)) {
       next_update = time(NULL) + 60; // one minute ahead
 
diff --git a/multiplexer.c b/multiplexer.c
index 9bfdf1b..48e218c 100644
--- a/multiplexer.c
+++ b/multiplexer.c
@@ -11,16 +11,6 @@
 
 #include "multiplexer.h"
 
-/** TODO
-void printButton(int g)
-{
-  if (GET_GPIO(g)) // !=0 <-> bit is 1 <- port is HIGH=3.3V
-    printf("Button pressed!\n");
-  else // port is LOW=0V
-    printf("Button released!\n");
-} **/
-
-
 //
 // Set up a memory regions to access GPIO
 //
@@ -70,10 +60,18 @@ void *put_on_display(void *param)
 
 #ifdef SKIP_GPIO
     usleep(10000);
-    printf("=\n");
 #endif
     display_data -> is_buf = display_data -> should_buf;
+    if (!display_data -> should_be_on) {
+      if (!display_data -> is_on)
+        sleep(1);
+      else
+        turn_off_display();
+      continue;
+    }
+    display_data -> is_on = display_data -> should_be_on;
 #ifdef SKIP_GPIO
+    printf("=\n");
     for (line=0; line<7; line++) {
       for (column=0; column<40; column++) {
         if (display_data -> buf[display_data -> is_buf][column] & (0x01 << line))
@@ -143,6 +141,15 @@ void *scroll_it(void *param)
       perror("clock_gettime failed");
       break;
     }
+    if ((scroll_data -> shine_until != 0) && (scroll_data -> shine_until < time(NULL))) {
+      // turn off display
+      display_data . should_be_on = 0;
+      column = 0;
+    }
+    else {
+      // turn on display
+      display_data . should_be_on = 1;
+    }
     if (scroll_data -> update) {
       if ((buf[is_buf] . len != scroll_data -> input_len) || (memcmp(&buf[is_buf] . buf[buf[is_buf] . start], scroll_data -> input, scroll_data -> input_len) != 0)) {
         is_buf = (is_buf + 1) % 2;
@@ -163,13 +170,15 @@ void *scroll_it(void *param)
       // clear update flag
       scroll_data -> update = 0;
     }
-    for (int i=0; i<40; i++)
-      display_data . buf[(display_data . should_buf + 1) % 3][i] =
-        buf[is_buf] . buf[column + i];
-    column++;
-    if (buf[is_buf] . len > 0)
-      while (column >= buf[is_buf] . start + buf[is_buf] . len)
-        column -= buf[is_buf] . len;
+    if (display_data . should_be_on != 0) {
+      for (int i=0; i<40; i++)
+        display_data . buf[(display_data . should_buf + 1) % 3][i] =
+          buf[is_buf] . buf[column + i];
+      column++;
+      if (buf[is_buf] . len > 0)
+        while (column >= buf[is_buf] . start + buf[is_buf] . len)
+          column -= buf[is_buf] . len;
+    }
     if (clock_gettime(CLOCK_MONOTONIC_RAW, &stop_time) != 0) {
       scroll_data -> keep_running = 0;
       perror("clock_gettime failed");
@@ -179,7 +188,8 @@ void *scroll_it(void *param)
     int wait = (start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 25000;
     if (wait > 0)
       usleep(wait);
-    display_data . should_buf = (display_data . should_buf + 1) % 3;
+    if (display_data . should_be_on != 0)
+      display_data . should_buf = (display_data . should_buf + 1) % 3;
   }
   display_data . keep_running = 0;
   pthread_join(display_data . thread_id, NULL);
@@ -216,6 +226,8 @@ void multiplexer_setup_non_root(t_display_data *display_data)
   display_data -> is_buf = 0;
   display_data -> should_buf = 0;
   display_data -> keep_running = 1;
+  display_data -> is_on = 1;
+  display_data -> should_be_on = 1;
   pthread_create(&display_data -> thread_id, NULL, put_on_display, display_data);
   return;
 } // multiplexer_setup_non_root
@@ -224,6 +236,7 @@ void multiplexer_setup_scroll(t_scroll_data *scroll_data)
 {
   scroll_data -> update = 0;
   scroll_data -> keep_running = 1;
+  scroll_data -> shine_until = 0;
   pthread_create(&scroll_data -> thread_id, NULL, scroll_it, scroll_data);
   return;
 } // multiplexer_setup_scroll
@@ -241,3 +254,22 @@ void turn_off_display()
   GPIO_SET = 1<<PAR_CLK_PIN;
 #endif
 } // turn_off_display
+
+int got_input()
+{
+#ifdef SKIP_GPIO
+  struct timeval tv = { 0L, 0L };
+  fd_set fds;
+  FD_ZERO(&fds);
+  FD_SET(0, &fds);
+  if (select(1, &fds, NULL, NULL, &tv)) {
+    unsigned char c;
+    read(0, &c, sizeof(c));
+    return 1;
+  }
+  else
+    return 0;
+#else
+  return ! GET_GPIO(SENSE_PIN); // low = active
+#endif
+} // got_input
diff --git a/multiplexer.h b/multiplexer.h
index 86e99ee..bf40ad5 100644
--- a/multiplexer.h
+++ b/multiplexer.h
@@ -49,7 +49,7 @@ void *gpio_map;
 
 typedef struct {
   char buf[3][40];
-  int should_buf, is_buf, keep_running;
+  int should_buf, is_buf, keep_running, should_be_on, is_on;
   pthread_t thread_id;
 } t_display_data;
 
@@ -62,6 +62,7 @@ typedef struct {
   int update;
   char input[(SCROLL_BUF_LEN - 39) / 2];
   int input_len, keep_running;
+  time_t shine_until;
   pthread_t thread_id;
 } t_scroll_data;
 
@@ -86,3 +87,4 @@ int multiplexer_setup_root();
 void multiplexer_setup_non_root(t_display_data *display_data);
 void multiplexer_setup_scroll(t_scroll_data *scroll_data);
 void turn_off_display();
+int got_input();
-- 
cgit v1.2.3-54-g00ecf