diff --git a/tb/shinTest/ShinTopSpiTb.v b/tb/shinTest/ShinTopSpiTb.v
index 74d1fa1..a978daa 100644
--- a/tb/shinTest/ShinTopSpiTb.v
+++ b/tb/shinTest/ShinTopSpiTb.v
@@ -9,8 +9,8 @@
 `define ENABLE_SM1_SEND_TEST
 //`define ENABLE_SMx_SEND_TEST
 //`define ENABLE_ERR_PKT1_TEST
-`define ENABLE_ERR_PKT2_TEST
-//`define ENABLE_ERR_PKT3_TEST
+//`define ENABLE_ERR_PKT2_TEST
+`define ENABLE_ERR_PKT3_TEST
 
 //`define ENABLE_EXCHG_DATA_SEQ0_TEST
 //`define ENABLE_EXCHG_DATA_SEQ1_TEST
@@ -863,6 +863,11 @@ initial begin
     txBuf[2+3] = 8'h00;
     txBuf[3+3] = 8'h00;
     spi_trans( (16'h70), (`SPI_WRITE), (4), (`IF_IDX(0)) );
+
+    txBuf[0+3] = 8'h00;
+    txBuf[1+3] = 8'hFF;
+    txBuf[2+3] = 8'h00;
+    txBuf[3+3] = 8'h00;
     spi_trans( (16'h70), (`SPI_WRITE), (4), (`IF_IDX(1)) );
     spi_trans( (16'h70), (`SPI_WRITE), (4), (`IF_IDX(2)) );
     spi_trans( (16'h70), (`SPI_WRITE), (4), (`IF_IDX(3)) );
@@ -877,7 +882,7 @@ initial begin
 
     $fdisplay(spidata_file, "-中断改为脉冲模式");
     txBuf[3] = 8'h10;
-    txBuf[4] = 8'h80;
+    txBuf[4] = 8'h8A;
     spi_trans( (16'h7c), (`SPI_WRITE), (2), (`IF_IDX(0)) );
     spi_trans( (16'h7c), (`SPI_WRITE), (2), (`IF_IDX(1)) );
     spi_trans( (16'h7c), (`SPI_WRITE), (2), (`IF_IDX(2)) );
diff --git a/tb/shinTest/gen_pkt.py b/tb/shinTest/gen_pkt.py
index ae06995..49a5e54 100755
--- a/tb/shinTest/gen_pkt.py
+++ b/tb/shinTest/gen_pkt.py
@@ -2,6 +2,7 @@
 #encoding=utf-8
 import random
 import copy
+import time
 
 class GenPkt(object):
     def __init__(self):
@@ -313,6 +314,7 @@ def genSlvSMReadData(dev, sm, data_len):
 
 
 if __name__ == '__main__':
+    random.seed(int(time.time() * 1000))
     genPkt = GenPkt()
 
     #-------------------------------------------------------------------------
@@ -401,7 +403,7 @@ if __name__ == '__main__':
     genPkt.clean()
 
     data = list()
-    for  i in range(256):
+    for  i in range(1024):
         data.append(random.randint(0, 255))
 
     genPkt.setPkt(2, data)