Fix timeout issue

ADHamaApp/Db/hama.template

@@ -248,7 +248,7 @@ record(mbbo, "$(P)$(R)TriggerSource-S") {
    field(THVL, "4")
    field(THST, "Master Pulse")
    field(OUT,  "@asyn($(PORT),$(ADDR),$(TIMEOUT))H_TRIGGER_SOURCE")  
-   field(VAL,  "1")
+   field(VAL,  "0")
 }
 
 record(mbbi, "$(P)$(R)TriggerSource-RB") {

ADHamaApp/src/hama.cpp

@@ -495,9 +495,6 @@ epicsTimeStamp imageStamp;
             acquireStatusError = 0;
             setIntegerParam(ADStatus, ADStatusAcquire);
 
-            // release buffer
-			dcambuf_release(m_hdcam);
-
             status = startAcquire();
             printf("Status: %d\n", status);
             if (status != asynSuccess) {
@@ -922,7 +919,12 @@ asynStatus Hama::startAcquire(void)
 {
     int status = 0;
 
-    status = allocateBuffers(1000);
+    // release buffer
+	freeBuffers();
+
+    // allocate buffer
+    allocateBuffers(1000);
+
     // start capture
     m_err = dcamcap_start(m_hdcam, DCAMCAP_START_SNAP);
     if(failed(m_err)) {