diff --git a/doc/JW3425_boot_v6.bin b/doc/JW3425_boot_v6.bin
deleted file mode 100644
index e861c30..0000000
Binary files a/doc/JW3425_boot_v6.bin and /dev/null differ
diff --git a/doc/JW3425_boot_v8.bin b/doc/JW3425_boot_v8.bin
new file mode 100644
index 0000000..8a8c8c1
Binary files /dev/null and b/doc/JW3425_boot_v8.bin differ
diff --git a/doc/creat_jwt_boot.py b/doc/creat_jwt_boot.py
index 0d13a99..0c86eaf 100644
--- a/doc/creat_jwt_boot.py
+++ b/doc/creat_jwt_boot.py
@@ -5,7 +5,7 @@ import json
 
 
 
-BOOT_PATH ="JW3425_boot_v6.bin"
+BOOT_PATH ="JW3425_boot_v8.bin"
 APP_PATH ="MS-IEpro20231007.bin"
 OUT_PATH = "jwt_program.jwt"
 
@@ -23,6 +23,27 @@ def arr_from_int(num:int):
     return  bytearray([num&0xff,(num>>8)&0xff,(num>>16)&0xff,(num>>24)&0xff])
 
 
+
+def crc32(data:bytearray):
+    temp=0
+    crc=0xffffffff
+    i=0
+    if(len(data)%4!=0):
+        return 0
+    while(i<len(data)):
+        temp=data[i]|(data[i+1]<<8)|(data[i+2]<<16)|(data[i+3]<<24)
+        i+=4
+        for j in range(32):
+            if((crc^temp)&0x80000000)!=0:
+                crc=0x04c11db7^(crc<<1)
+            else:
+                crc<<=1
+            temp<<=1
+        crc&=0xffffffff
+    return crc
+
+
+
 def creat():
     boot=BOOT_PATH
     app=APP_PATH
@@ -35,6 +56,10 @@ def creat():
     d+=arr_byte_copy(0x00,0x3c7c-len(d))
     d+=arr_from_int(0x55aa6699)
     d+=arr_byte_copy(0x00,1024*16-len(d))
+
+    print("crc32 of all data:",hex(crc32(d)))
+    print("crc32 for 0x1000:",hex(crc32(d[4096:])))
+
     with open(OUT_PATH,"wb+") as f:
         f.write(d)
         print(OUT_PATH+" create boot file success.")
diff --git a/doc/jwt_program.jwt b/doc/jwt_program.jwt
index 442ebbe..3a9d348 100644
Binary files a/doc/jwt_program.jwt and b/doc/jwt_program.jwt differ
diff --git a/source/ReadMe.txt b/source/ReadMe.txt
index e9462d0..28bbcfc 100644
--- a/source/ReadMe.txt
+++ b/source/ReadMe.txt
@@ -188,4 +188,7 @@
     发现gd32不能以地址0x00000000来擦除flash
     修改擦除地址为0x08000000来解决无法写入的问题
     添加设置总线电压cmd命令
+2023.10.9
+    实现通过iic下载模块程序，期间自动开启和关闭总线
+    实现通过总线下载模块程序，crc32校验失败
 
diff --git a/source/dev/dev_flash.c b/source/dev/dev_flash.c
index b8e8eaa..bd81ff3 100644
--- a/source/dev/dev_flash.c
+++ b/source/dev/dev_flash.c
@@ -39,10 +39,10 @@ scheme 109~110
 #define FLASH_BUFF_SECTOR_NUM     (50)
 #define FLASH_PARAM_SECTOR        (108)
 #define FLASH_PARAM_SECTOR_NUM    (1)
-#define FLASH_SCHEME_SECTOR       (109)
-#define FLASH_SCHEME_SECTOR_NUM   (3)
-#define FLASH_JWTCODE_SECTOR      (112)
+#define FLASH_JWTCODE_SECTOR      (109)
 #define FLASH_JWTCODE_SECTOR_NUM  (9)
+#define FLASH_SCHEME_SECTOR       (118)
+#define FLASH_SCHEME_SECTOR_NUM   (6)
 
 
 
diff --git a/source/elec_det/base/define.h b/source/elec_det/base/define.h
index 81c2954..0204db9 100644
--- a/source/elec_det/base/define.h
+++ b/source/elec_det/base/define.h
@@ -58,12 +58,12 @@ uint8_t  uc_buf[4];
 // 模块程序地址
 // 这个地址要和 dev_flash.c 中定义的地址相对应
 #define MC_CODE_ADDR \
-  (FLASH_BASE+2048*112+128)
+  (FLASH_BASE+2048*109+128)
 
 // 方案地址
 // 这个地址要和 dev_flash.c 中定义的地址相对应
 #define APP_TEST_PLAN_ADDR \
-  (FLASH_BASE+2048*109+128)
+  (FLASH_BASE+2048*118+128)
 
 // 方案大小
 #define APP_TEST_PLANINFO_SIZE  2048
diff --git a/source/elec_det/driver/EWDriver.c b/source/elec_det/driver/EWDriver.c
index 55f033f..6bf89bc 100644
--- a/source/elec_det/driver/EWDriver.c
+++ b/source/elec_det/driver/EWDriver.c
@@ -16,7 +16,8 @@ static volatile CurrentSample_Range_eu buscurrent_range = Current_Max;
 #endif
 
 #define SMod_Read_Idle_Filter  90
-#define DMod_Read_Idle_Filter  50
+// 根据反码电流改变
+#define DMod_Read_Idle_Filter  300
 
 volatile uint16_t* EW_Read_AD_V = FireBus_ADC_Buf;
 static volatile uint16_t SMod_Read_Idle_C;
@@ -757,7 +758,7 @@ uint8_t DMod_ReadBytesXor(uint8_t* buf, uint8_t len,uint16_t retry_times)
     else
       return 2;
   }
-  return 1;
+  return ret;
 }
 
 
diff --git a/source/elec_det/elec_cmd.c b/source/elec_det/elec_cmd.c
index 77aa022..5f2cae4 100644
--- a/source/elec_det/elec_cmd.c
+++ b/source/elec_det/elec_cmd.c
@@ -3,6 +3,7 @@
 #include "mystring.h"
 #include "mystdlib.h"
 #include "hardware/jw3425iic.h"
+#include "hardware/power.h"
 #include "interface/BaseChecker.h"
 #include "base/define.h"
 #include "base/utility.h"
@@ -65,8 +66,15 @@ static int cmd_iic_updata(list_def *argv)
   crc32=Crc32Calu((uint32_t*)MC_CODE_ADDR,16*1024);
   boardinfo_un.boardinfo.mc_ICodeCrc32=crc32;
   cmd_print("crc32=0x%04x.",crc32);
-  MC_IICUpdateMTP();
-  ret=checker_runcfg.excue_rtv;
+  
+  ret=PowerCalibration_set(85,55);
+  if(ret==0){
+    MC_IICUpdateMTP();
+    ret=checker_runcfg.excue_rtv;
+  }
+  PowerCalibration_set(POWER_DEF_V,45);
+  POWER_OFF;
+  
   cmd_print("cmd end,ret=%d.",ret);
   return 0;
 }
@@ -100,18 +108,23 @@ commend_export(iic_read,cmd_iic_read,"read mtp via iic,param:mtp_addr,data_lengt
 // 设置总线电压
 static int cmd_set_bus_power(list_def *argv)
 {
-  if(list_length(argv)<2){
+  if(list_length(argv)<3){
     cmd_print("param num too less.");
     return -1;
   }
-  int bus_v=str_atoi(list_get_str(argv,1));
+  int bus_hv=str_atoi(list_get_str(argv,1));
+  int bus_mv=str_atoi(list_get_str(argv,2));
   int ret=0;
-  checker_runcfg.params[0]=(uint16_t)bus_v;
-  checker_runcfg.param_count=1;
-  EW_Test_SetBusV();
-  ret=checker_runcfg.excue_rtv;
+  if(bus_hv>0){
+    ret=PowerCalibration_set(bus_hv,bus_mv);
+  }
+  else{
+    ret=PowerCalibration_set(POWER_DEF_V,45);
+    POWER_OFF;
+  }
   cmd_print("cmd end,ret=%d.",ret);
+  return 0;
 }
-commend_export(bus_power,cmd_set_bus_power,"set bus power,param:bus_power")
+commend_export(bus_power,cmd_set_bus_power,"set bus power,param:bus_high_v,bus_mid_v")
 
 
diff --git a/source/elec_det/interface/EWChecker.c b/source/elec_det/interface/EWChecker.c
index 6061e44..b5ed6b5 100644
--- a/source/elec_det/interface/EWChecker.c
+++ b/source/elec_det/interface/EWChecker.c
@@ -7,8 +7,12 @@
 #include "hardware/power.h"
 #include "hardware/timer_cfg.h"
 #include "debug.h"
+#include "commend.h"
+#include "mystring.h"
+#include "mystdlib.h"
 
-#define UPDATA_PACK_LEN   58
+
+#define UPDATA_PACK_LEN   128
 #define UPDATA_BASE_ADDR  0x1000
 #define UPDATA_DATA_LEN   (12*1024)
 #define UPDATA_FLAG_ADDR  (0x3c7c)
@@ -24,9 +28,15 @@ static uint8_t EW_Erease(void)
   DMod_SendBytesXor(data,2,1);
   ret=DMod_ReadBytesXor(read,4,100);
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(50);
   return ret;
 }
+static int cmd_jwt_boot_erase(list_def *argv)
+{
+  int ret=0;
+  ret=EW_Erease();
+  return ret;
+}
+commend_export(jwt_boot_erase,cmd_jwt_boot_erase,"jwt srase in boot")
 
 
 // 跳转
@@ -38,27 +48,61 @@ static uint8_t EW_Jump(void)
   DMod_SendBytesXor(data,2,1);
   ret=DMod_ReadBytesXor(read,4,100);
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(50);
   return ret;
 }
+static int cmd_jwt_boot_jump(list_def *argv)
+{
+  int ret=0;
+  ret=EW_Jump();
+  return ret;
+}
+commend_export(jwt_boot_jump,cmd_jwt_boot_jump,"jwt jump in boot")
 
 
 // 充电
 static uint8_t EW_Charg(void)
 {
-  uint8_t data[4]={0xf8,0x01,0x04,0x00};
+  uint8_t data[4]={0xf8,0x01,0x01,0x00};
   uint8_t read[4]={0};
   uint8_t ret=0;
-  delay_ms(2000);
   DMod_SendBytesXor(data,3,1);
   ret=DMod_ReadBytesXor(read,4,100);
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(5000);
   return ret;
 }
+static int cmd_jwt_boot_charg(list_def *argv)
+{
+  int ret=0;
+  ret=EW_Charg();
+  return ret;
+}
+commend_export(jwt_boot_charg,cmd_jwt_boot_charg,"jwt charg in boot")
+
+
+
+// 放电
+static uint8_t EW_DisCharg(void)
+{
+  uint8_t data[4]={0xf8,0x01,0x00,0x00};
+  uint8_t read[4]={0};
+  uint8_t ret=0;
+  DMod_SendBytesXor(data,3,1);
+  ret=DMod_ReadBytesXor(read,4,100);
+  DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
+  return ret;
+}
+static int cmd_jwt_boot_discharg(list_def *argv)
+{
+  int ret=0;
+  ret=EW_Charg();
+  return ret;
+}
+commend_export(jwt_boot_discharg,cmd_jwt_boot_discharg,"jwt discharg in boot")
+
+
 
 // 发送数据
-// len 最长为58字节
+// len 最长为128字节
 static uint8_t EW_Write(uint16_t addr,uint8_t *d,uint16_t len)
 {
   uint8_t ret=0;
@@ -74,7 +118,6 @@ static uint8_t EW_Write(uint16_t addr,uint8_t *d,uint16_t len)
   ret=DMod_ReadBytesXor(read,4,100);
   rt_free(buf);
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(50);
   return ret;
 }
 
@@ -93,10 +136,22 @@ static uint8_t EW_CheckCrc(uint16_t adr_start,uint16_t adr_end,uint32_t *crc)
       *crc=(read[3])|(read[4]<<8)|(read[5]<<16)|(read[6]<<24);
     }
   }
-  DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(50);
+  DBG_LOG("addr_start=0x%04x,addr_end=0x%04x.",adr_start,adr_end);
+  DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x,",
+    ret,read[0],read[1],read[2],read[3],read[4],read[5],read[6],read[7]);
   return ret;
 }
+static int cmd_jwt_boot_checkcrc(list_def *argv)
+{
+  int ret=0;
+  uint32_t crc=0;
+  ret=EW_CheckCrc(UPDATA_BASE_ADDR,UPDATA_BASE_ADDR+UPDATA_DATA_LEN,&crc);
+  cmd_print("jwt crc32=0x%04x.",crc);
+  crc=Crc32Calu((uint32_t *)(MC_CODE_ADDR+UPDATA_BASE_ADDR),UPDATA_DATA_LEN);
+  cmd_print("local crc32=0x%04x.",crc);
+  return ret;
+}
+commend_export(jwt_boot_checkcrc,cmd_jwt_boot_checkcrc,"jwt checkcrc in boot")
 
 
 
@@ -116,20 +171,31 @@ static uint8_t EW_Read(uint16_t adr,uint8_t *buf,uint16_t len)
     rt_memcpy(buf,&read[3],len);
   }
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,read[0],read[1],read[2],read[3]);
-  delay_ms(50);
   rt_free(read);
   return ret;
 }
 
 
+
+
+
 // app:通信测试
-static void EW_appCommTest(void)
+static int EW_appCommTest(void)
 {
   uint8_t data[4]={0x11,0x22};
   uint8_t ret;
+  DBG_LOG("send:%02x,%02x.",data[0],data[1]);
   ret=EW_CommTest(data,2,300);
   DBG_LOG("ret=%d,dat=%02x,%02x,%02x,%02x,",ret,data[0],data[1],data[2],data[3]);
+  return ret;
 }
+static int cmd_jwt_app_commtest(list_def *argv)
+{
+  int ret=0;
+  ret=EW_appCommTest();
+  return ret;
+}
+commend_export(jwt_app_commtest,cmd_jwt_app_commtest,"jwt commtest in app")
 
 
 // 升级
@@ -143,12 +209,13 @@ void EW_Updata(void)
   uint8_t pack_len=UPDATA_PACK_LEN;
   uint32_t crc=0;
   uint32_t crc_module=0;
-  EW_appCommTest();
+  delay_ms(100);
   ret=EW_Charg();
   if(ret) {ret=1;goto err;}
+  delay_ms(6000);
   ret=EW_Erease();
-  //ret=EW_Jump();
   if(ret) {ret=2;goto err;}
+  delay_ms(600);
   while(len>0){
     pack_len=len>UPDATA_PACK_LEN?UPDATA_PACK_LEN:len;
     ret=EW_Write(addr,data,pack_len);
@@ -156,12 +223,15 @@ void EW_Updata(void)
     data+=pack_len;
     len-=pack_len;
     if(ret) {ret=3;goto err;}
+    delay_ms(50);
   }
-  crc=Crc32Calu((uint32_t *)MC_CODE_ADDR,UPDATA_DATA_LEN/4);
+  crc=Crc32Calu((uint32_t *)(MC_CODE_ADDR+UPDATA_BASE_ADDR),UPDATA_DATA_LEN);
+  DBG_LOG("local crc:0x%04x.",crc);
   ret=EW_CheckCrc(UPDATA_BASE_ADDR,UPDATA_BASE_ADDR+UPDATA_DATA_LEN,&crc_module);
+  DBG_LOG("module crc:0x%04x.",crc_module);
   if(ret) {ret=4;goto err;}
-  if(crc!=crc_module)
-    {ret=5;goto err;}
+  if(crc!=crc_module){ret=5;goto err;}
+  delay_ms(50);
   ret=EW_Jump();
   if(ret) {ret=6;goto err;}
   delay_ms(100);
@@ -185,6 +255,8 @@ void EW_Test_PowerOFF(void)
 	uint8_t uc_rtv = 0;
 	delay_os_ms(100);
 	XTBUS_OFF;
+  PowerCalibration_set(POWER_DEF_V,45);
+  POWER_OFF;
 	Checker_MaskResult(uc_rtv,checker_runcfg.task_info.runindex);
 }
 
@@ -218,7 +290,7 @@ void EW_Test_SetBusV(void)
 		uc_rtv = 1;
 
 	}else{
-		us_m_v  = 50;
+		us_m_v  = 55;
 		uc_rtv |= PowerCalibration_set(us_h_v,us_m_v);
 		XTBUS_ON
 
diff --git a/source/main/compiler_info.h b/source/main/compiler_info.h
index 985105b..7fe0422 100644
--- a/source/main/compiler_info.h
+++ b/source/main/compiler_info.h
@@ -6,7 +6,7 @@
 
 
 
-#define BUILD_DATE  "2023-10-08 17:53:21"
+#define BUILD_DATE  "2023-10-09 17:54:49"
 #define SOFT_VERSION  "0.03"