From 8eb6bcb11287031200a162e7407c965545cc6dc7 Mon Sep 17 00:00:00 2001
From: Pim van Pelt <pim@ipng.nl>
Date: Thu, 1 Nov 2018 20:29:51 +0100
Subject: [PATCH] add channel_set_duration() for timer based polls

---
 include/main.h |  1 +
 src/channel.c  | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/include/main.h b/include/main.h
index 5091a2b..b6c99b1 100644
--- a/include/main.h
+++ b/include/main.h
@@ -24,6 +24,7 @@ bool channel_init(const char *fn);
 uint8_t channel_gpio_by_idx(int idx);
 uint8_t channel_idx_by_gpio(int gpio);
 void channel_set(int idx, bool state);
+void channel_set_duration(int idx, bool state, uint16_t seconds);
 bool channel_get(int idx);
 int channel_get_total();
 void channel_handler(int gpio, void *arg);
diff --git a/src/channel.c b/src/channel.c
index cfb2496..0714fad 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -144,6 +144,28 @@ uint8_t channel_idx_by_gpio(int gpio) {
   return GPIO_INVALID;
 }
 
+// Slightly tricky callback (installed on a timer by channel_set and
+// channel_toggle carries information in the arg pointer -- top 16 bits are
+// the channel idx, LSB is boolean value to set the channel to.
+static void channel_set_cb(void *arg) {
+  uint32_t input=(uint32_t) arg;
+  int idx = input>>16;
+  int value = input & 0x1;
+  LOG(LL_INFO, ("Channel callback for channel %d value %d", idx, value));
+  channel_set(idx, (bool)value);
+}
+
+void channel_set_duration(int idx, bool state, uint16_t seconds) {
+  uint32_t val;
+  channel_set(idx, state);
+
+  // Pass an argument to the channel_set_cb callback, top 16 bits is channel,
+  // bottom bit is what to set it to
+  val = idx<<16+(!state);
+  LOG(LL_INFO, ("Setting timer for %d seconds on channel %d with future value %d", seconds, idx, !state));
+  mgos_set_timer (1000 * seconds, false /* oneshot */, channel_set_cb, (void *)val);
+}
+
 void channel_set(int idx, bool state) {
   double now = mg_time();