From 64dbc9ccfebb46bb223655c385a4b8aa7fd64392 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Fri, 15 Mar 2019 16:40:04 -0700
Subject: cancel any existing exposure/readout operation on camera connection

---
 src/qhyccd/QHYCCDCam.rs | 1 +
 src/qhyccd/mod.rs       | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/qhyccd/QHYCCDCam.rs b/src/qhyccd/QHYCCDCam.rs
index 6194835..37deef9 100644
--- a/src/qhyccd/QHYCCDCam.rs
+++ b/src/qhyccd/QHYCCDCam.rs
@@ -115,6 +115,7 @@ extern "C" {
         imagew: *mut os::raw::c_int, imageh: *mut os::raw::c_int,
         pixelw: *mut os::raw::c_double, pixelh: *mut os::raw::c_double,
         bpp: *mut os::raw::c_int) -> os::raw::c_int;
+    pub fn CancelQHYCCDExposingAndReadout(handle: *mut os::raw::c_void) -> os::raw::c_int;
     pub fn ControlQHYCCDTemp(handle: *mut os::raw::c_void, target: os::raw::c_double) -> os::raw::c_int;
     pub fn SetQHYCCDDebayerOnOff(handle: *mut os::raw::c_void, onoff: os::raw::c_int) -> os::raw::c_int;
     pub fn SetQHYCCDBinMode(handle: *mut os::raw::c_void, wbin: os::raw::c_int, hbin: os::raw::c_int) -> os::raw::c_int;
diff --git a/src/qhyccd/mod.rs b/src/qhyccd/mod.rs
index 192b943..0ce31e2 100644
--- a/src/qhyccd/mod.rs
+++ b/src/qhyccd/mod.rs
@@ -64,6 +64,7 @@ pub fn acquire(camera_idx: i32) -> Result<Camera> {
         }
         check(QHYCCDCam::SetQHYCCDStreamMode(handle, 0))?; // 0 means single frame mode...
         check(QHYCCDCam::InitQHYCCD(handle))?;
+        check(QHYCCDCam::CancelQHYCCDExposingAndReadout(handle))?;
         Ok(Camera {
             handle: handle
         })
-- 
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