diff --git a/TrainCamp_zhangcheng_PLSR/app/src/plsr.c b/TrainCamp_zhangcheng_PLSR/app/src/plsr.c
index ad8409c..52a36c4 100644
--- a/TrainCamp_zhangcheng_PLSR/app/src/plsr.c
+++ b/TrainCamp_zhangcheng_PLSR/app/src/plsr.c
@@ -161,11 +161,11 @@ void PlsrModuleTask(void *pArg)
             continue;
         }
 
-        if (plsr.segment[currentSegment].pulseFreq <= 5000)
-            pulseFreq = 3360 - 1;
-        else if ((plsr.segment[currentSegment].pulseFreq > 5000)
+        if (plsr.segment[currentSegment].pulseFreq <= 1000)
+            pulseFreq = 2625 - 1;
+        else if ((plsr.segment[currentSegment].pulseFreq > 1000)
                     && (plsr.segment[currentSegment].pulseFreq <= 100000))
-            pulseFreq = 2 - 1;
+            pulseFreq = 4 - 1;
         else
             continue;
 
@@ -435,23 +435,19 @@ static void FirstSegmentProc(SEGMENT_PART *segmentPart)
             incAll += segmentPart->inc;
             if (plsr.segment[currentSegment].pulseFreq <= 5000)
             {
-                tim10.setPsc(&tim10, 3360 - 1);
-                if (currentSpeed != 0)
-                    tim10.setPer(&tim10, 50000 / currentSpeed);
-                else
-                    tim10.setPer(&tim10, 1000);
-                tim10.registerIrq(&tim10, TimCallBack, &currentSeg.currentPart);
-                tim10.open(&tim10);
-                tim10.openIrq(&tim10);
+                tim10.setPsc(&tim10, 2625 - 1);
             }   
             else
             {
                 tim10.setPsc(&tim10, 168 - 1);
-                tim10.setPer(&tim10, 1000000 / currentSpeed);
-                tim10.registerIrq(&tim10, TimCallBack, &currentSeg.currentPart);
-                tim10.open(&tim10);
-                tim10.openIrq(&tim10);
             }
+            if (currentSpeed != 0)
+                tim10.setPer(&tim10, 168000000 / (TIM10->PSC + 1) / currentSpeed);
+            else
+                tim10.setPer(&tim10, 1000);
+            tim10.registerIrq(&tim10, TimCallBack, &currentSeg.currentPart);
+            tim10.open(&tim10);
+            tim10.openIrq(&tim10);
                 
         }
     }