From fc0306564c491b435e6e2c9e999041a98e78a7f9 Mon Sep 17 00:00:00 2001
From: Dhanya Thattil <dhanya.thattil@psi.ch>
Date: Thu, 28 Mar 2019 14:22:40 +0100
Subject: [PATCH] ctb server: sync is min clock and must go higher when the
 others do

---
 .../ctbDetectorServer/slsDetectorFunctionList.c      | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
index dc9fbcfcb..aab345f1d 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
@@ -1783,21 +1783,25 @@ void configureSyncFrequency(enum CLKINDEX ind) {
 
     int configure = 0;
 
-    // sync is greater than current
+    // find the smallest frequency
+    int min = (aFreq < bFreq) ? aFreq : bFreq;
+    min = (retval < min) ? retval : min;
+
+    // sync is greater than min
     if (syncFreq > retval)  {
         FILE_LOG(logINFO, ("\t--Configuring Sync Clock\n"));
         configure = 1;
     }
 
-    // the others are both greater than current
-    else if ((aFreq > retval && bFreq > retval)) {
+    // sync is smaller than min
+    else if (syncFreq < min) {
         FILE_LOG(logINFO, ("\t++Configuring Sync Clock\n"));
         configure = 1;
     }
 
     // configure sync to current
     if (configure)
-        configureFrequency(SYNC_CLK, retval);
+        configureFrequency(SYNC_CLK, min);
 }
 
 void setAdcOffsetRegister(int adc, int val) {