diff --git a/tb/shinTest/ShinTopSpiTb.v b/tb/shinTest/ShinTopSpiTb.v
index e37f83c..e068922 100644
--- a/tb/shinTest/ShinTopSpiTb.v
+++ b/tb/shinTest/ShinTopSpiTb.v
@@ -690,7 +690,11 @@ task spi_trans( input [15:0] saddress, input [7:0] scmd, input [12:0] slength, i
 `else
     txBuf[2] <= (scmd | slength[12:8]);
     txBuf[3] <= slength[7:0];
-    length <= slength + 4 + 1;
+    if (sidx >=(`ALL_DEV_NUM * 3)) begin
+      length <= slength + 4 + 1;
+    end else begin
+      length <= slength + 4;
+    end
 `endif
 
     idx <= sidx;
diff --git a/tb/shinTest/pyutils/GenPkt.py b/tb/shinTest/pyutils/GenPkt.py
index 8abe0f6..677af51 100644
--- a/tb/shinTest/pyutils/GenPkt.py
+++ b/tb/shinTest/pyutils/GenPkt.py
@@ -7,17 +7,17 @@ class GenPkt(object):
     def __init__(self):
         super(GenPkt, self).__init__()
         
-        self.pkt_buf = list() #bytearray(b'\0' * 2048)
+        self.pkt_buf = [] #list() #bytearray(b'\0' * 2048)
         self.pkt_type = 0
         self.pkt_sub_pkt = 0
-        self.sub_pkt = list()
+        self.sub_pkt = [] #list()
         self.pkt_data = None
 
     def clean(self):
-        self.pkt_buf = list() #bytearray(b'\0' * 2048)
+        self.pkt_buf = []#list() #bytearray(b'\0' * 2048)
         self.pkt_type = 0
         self.pkt_sub_pkt = 0
-        self.sub_pkt = list()
+        self.sub_pkt = []#list()
         self.pkt_data = None
 
     def setPktType(self, type):
@@ -42,9 +42,9 @@ class GenPkt(object):
     def addAfterExc(self, str):
         self.sub_pkt.append([2, str])
     
-    def addSubPkt(self, dev_idx, ptype, addr, cmd, len, data):
-        if (len > 2032):
-            print('Error, bad subpkt len:%d', len)
+    def addSubPkt(self, dev_idx, ptype, addr, cmd, l, data):
+        if (l > 2032):
+            print('Error, bad subpkt len:%d', l)
             return 
         if not (ptype in [0, 2]):
             print('Error, bad subpkt type:', ptype)
@@ -54,7 +54,8 @@ class GenPkt(object):
             return 
         
         self.pkt_sub_pkt = self.pkt_sub_pkt + 1
-        self.sub_pkt.append([0, dev_idx, ptype, addr, cmd, len, data])
+        self.sub_pkt.append([0, dev_idx, ptype, addr, cmd, l, data])
+        #print(len(self.sub_pkt), hex(cmd))
 
     def gen(self, filename="pkt_verilog_test.v", filetype=0, appendgen=False, gen_name=None):
         gen_pkt_type = 0
diff --git a/tb/shinTest/testcase/sync.py b/tb/shinTest/testcase/sync.py
index 19728ea..a0d15f7 100644
--- a/tb/shinTest/testcase/sync.py
+++ b/tb/shinTest/testcase/sync.py
@@ -413,16 +413,16 @@ def tc4():
     genPkt.clean()
     genPkt.setPktType(0)
     sm_idx = 3
-    
+    #print('------------')
     genPkt.addBeforeExc(genEnableInsertTimeCode(0xa)
         + '''spi_trans( (16'h0100), (`SPI_READ), (8), (`IF_IDX(0)));\n'''
         #+ '''_temp_time = rxBuf[3] + (rxBuf[4] << 8) + (rxBuf[5] << 16) + (rxBuf[6] << 24) + (rxBuf[7] << 32) + (rxBuf[8] << 40) + (rxBuf[9] << 48) + (rxBuf[10] << 56);\n'''
         + '''_temp_time = rxBuf[`ARRAY_IDX_OFF] + (rxBuf[`ARRAY_IDX_OFF+1] << 8) + (rxBuf[`ARRAY_IDX_OFF+2] << 16) + (rxBuf[`ARRAY_IDX_OFF+3] << 24) + (rxBuf[`ARRAY_IDX_OFF+4] << 32) + (rxBuf[`ARRAY_IDX_OFF+5] << 40) + (rxBuf[`ARRAY_IDX_OFF+6] << 48) + (rxBuf[`ARRAY_IDX_OFF+7] << 56);\n'''
         + '''_temp_time = _temp_time + 32'h3000;\n\n''')
     
-    genPkt.addSubPkt(0, 0, 0x18, 0xe, 2, [0x1, 0x58])
     genPkt.addSubPkt(0x0, 0, 0x0, 0xc, 12, b'\0'*12)
-
+    genPkt.addSubPkt(0, 0, 0x18, 0xe, 2, [0x1, 0x58])
+    
     #subPkt参数：索引、索引类型、地址、命令、长度、数据
     data = [0,] * 100 #bytearray(b"\0" * 100)
     data[0] = 0x0f  #地址0x120
@@ -649,8 +649,8 @@ def tc5():
         + '''_temp_time = rxBuf[`ARRAY_IDX_OFF] + (rxBuf[`ARRAY_IDX_OFF+1] << 8) + (rxBuf[`ARRAY_IDX_OFF+2] << 16) + (rxBuf[`ARRAY_IDX_OFF+3] << 24) + (rxBuf[`ARRAY_IDX_OFF+4] << 32) + (rxBuf[`ARRAY_IDX_OFF+5] << 40) + (rxBuf[`ARRAY_IDX_OFF+6] << 48) + (rxBuf[`ARRAY_IDX_OFF+7] << 56);\n'''
         + '''_temp_time = _temp_time + 32'h3000;\n\n''')
     
-    genPkt.addSubPkt(0, 0, 0x18, 0xe, 2, [0x1, 0x58])
     genPkt.addSubPkt(0x0, 0, 0x0, 0xc, 12, b'\0'*12)
+    genPkt.addSubPkt(0, 0, 0x18, 0xe, 2, [0x1, 0x58])
 
     #subPkt参数：索引、索引类型、地址、命令、长度、数据
     data = [0,] * 100 #bytearray(b"\0" * 100)