diff --git a/CableTool/common.h b/CableTool/common.h
index c780af7..32076eb 100644
--- a/CableTool/common.h
+++ b/CableTool/common.h
@@ -92,7 +92,11 @@ typedef unsigned   uint32_t;
 #define USART_BUF_SIZE 1088
 #define DEBUG_DATA_SIZE 1024
 #define UPDATE_DATA_SIZE	DEBUG_DATA_SIZE
+
+#define FLASH_LOG_BUF_LEN 256
+
 #define FD_BUF_LEN 256
+#define FLASH_LOG_DATA_LEN 248
 
 #define MONITOR_ADCi_NOTIFY_OK 0x101
 #define MONITOR_ADC_NOTIFY_OK 0x102
@@ -451,6 +455,13 @@ typedef struct
     uint8_t reserve[2];
 } waveParam_t;
 
+/* Note: 必须保证这个结构体的大小是可以被flash扇区大小整除的,比如128,256... */
+typedef struct 
+{
+    uint64_t id;
+    uint8_t data[FLASH_LOG_DATA_LEN];
+} falsh_log_t;
+
 /* Note: 必须保证这个结构体的大小是可以被flash扇区大小整除的,比如128,256... */
 typedef struct 
 {
diff --git a/CableTool/widget.cpp b/CableTool/widget.cpp
index 912c243..e0f545e 100644
--- a/CableTool/widget.cpp
+++ b/CableTool/widget.cpp
@@ -52,6 +52,7 @@ Widget::Widget(QWidget *parent)
     is_wave_up = 0;
     dataIndex = 0;
     is_data_up = false;
+    historyDataSum = 0;
     logSum = 0;
 
     energyMode[0] = "未知";
@@ -910,6 +911,69 @@ int Widget::protoAdjustInfo(char *data)
     return 0;
 }
 
+int Widget::protoLog(char * data)
+{
+    mul_head_t *header = reinterpret_cast<mul_head_t*>(data + sizeof(mul_head_t));
+    falsh_log_t *log;
+    uint32_t cnt = 0;
+
+    /* 数据头校验. */
+    if (header->index != logIndex
+        || header->len > UPDATE_DATA_SIZE)
+    {
+        return -1;
+    }
+
+    /* 获取文件. */
+    QFile file("log.txt");
+    if (0 == header->index)
+    {
+        file.remove();
+    }
+
+    if (file.open(QIODevice::WriteOnly | QIODevice::Append))
+    {
+        cnt = header->len / FLASH_LOG_BUF_LEN;
+        for(uint32_t i = 0; i < cnt; i++)
+        {
+            log = reinterpret_cast<falsh_log_t*>(data + sizeof(proto_head_t) + sizeof(mul_head_t) + i * FLASH_LOG_BUF_LEN);
+            file.write((char *)log->data, strlen((char *)log->data));
+            ui->logTextEdit->insertPlainText((char *)log->data);
+        }
+        file.close();
+    }
+    else
+    {
+        qDebug() << "file ERROR";
+        return -1;
+    }
+
+    /* 通知发包线程进入下个状态. */
+    if (header->len < UPDATE_DATA_SIZE)
+    {
+        //work->multipleIndexSet(0);
+        //work->stateSet(CM_usart::WS_IDLE);
+        logIndex = 0;
+        buttonEnable(true);
+        ui->logIndexLabel->setText("下载完成");
+        QMessageBox::information(this, "SUCCEED", "Log 文件下载完成.", QMessageBox::Ok);
+        is_log_up = false;
+        ui->stateLogButton->setText("下载 Log");
+    }
+    else
+    {
+        logIndex = header->index + 1;;
+        QString temp;
+        temp.sprintf("%d / %d", logIndex, ui->stateLogEdit->text().toInt());
+        ui->logIndexLabel->setText(temp);
+        //work->multipleIndexSet(header->index + 1);
+        sendMsgLogGet();
+    }
+
+    return 0;
+}
+
+
 int Widget::protoHistoryData(char * data)
 {
 	mul_head_t *header = reinterpret_cast<mul_head_t*>(data + sizeof(proto_head_t));
@@ -993,6 +1057,7 @@ int Widget::protoHistoryData(char * data)
         //work->multipleIndexSet(header->index + 1);
         sendMsgHistoryDataGet();
     }
+    return 0;
 }
 
 int Widget::paraseProtocols(char *data)
@@ -1466,6 +1531,31 @@ int Widget::sendMsgWaveCal()
     return 0;
 }
 
+int Widget::sendMsgLogGet()
+{
+    char buf[2048] = {0};
+    uint32_t *crc = nullptr;
+    proto_head_t *header = reinterpret_cast<proto_head_t*>(buf);
+    mul_head_t *m_head = reinterpret_cast<mul_head_t*>(buf + sizeof(proto_head_t));
+    int32_t *data = reinterpret_cast<int32_t*>(buf + sizeof(proto_head_t) + sizeof(mul_head_t));
+
+    /* 初始化报文头. */
+    protoHeaderInit(header, sizeof(proto_head_t) + sizeof(mul_head_t) + sizeof(uint32_t), clientDevInfo.id, DEBUG_CT_PRV_REQUEST, DEBUG_PRV_LOG);
+
+    m_head->index = logIndex;
+    m_head->len = 0;
+    *data = logSum;
+
+    /* 计算校验位. */
+    crc = reinterpret_cast<uint32_t*>(buf + header->len);
+    *crc = crc32(buf, header->len);
+
+    HexPrint(__FUNCTION__, buf, header->len + 4);
+    writeData(buf, header->len + 4);
+    return 0;
+}
+
+
 int Widget::sendMsgHistoryDataGet()
 {
     char buf[2048] = {0};
@@ -1479,7 +1569,7 @@ int Widget::sendMsgHistoryDataGet()
 
     m_head->index = dataIndex;
     m_head->len = 0;
-    *data = logSum;
+    *data = historyDataSum;
 
     /* 计算校验位. */
     crc = reinterpret_cast<uint32_t*>(buf + header->len);
@@ -1854,7 +1944,7 @@ void Widget::on_stateLogButton_clicked()
         logIndex = 0;
         QString temp;
         temp.sprintf("0 / %d", ui->stateLogEdit->text().toInt());
-        //work->logSumSet(ui->stateLogEdit->text().toInt());
+        logSum = ui->stateLogEdit->text().toInt();
         ui->logTextEdit->clear();
         ui->logIndexLabel->setText(temp);
         //work->multipleIndexSet(0);
@@ -1884,7 +1974,7 @@ void Widget::on_historyDataButton_clicked()
         dataIndex = 0;
         QString temp;
         temp.sprintf("0 / %d", ui->historyDataEdit->text().toInt());
-        logSum = ui->historyDataEdit->text().toInt();
+        historyDataSum = ui->historyDataEdit->text().toInt();
         ui->dataIndexLabel->setText(temp);
         sendMsgHistoryDataGet();
 
diff --git a/CableTool/widget.h b/CableTool/widget.h
index 9dd3e4c..dfbc34e 100644
--- a/CableTool/widget.h
+++ b/CableTool/widget.h
@@ -143,6 +143,8 @@ private:
 	
 	int protoAdjustInfo(char *data);
 
+	int protoLog(char * data);
+
 	int protoHistoryData(char *data);
 	
     int paraseProtocols(char *data);
@@ -172,6 +174,8 @@ private:
 	
 	int sendMsgWaveCal();
 
+	int sendMsgLogGet();
+
     int sendMsgHistoryDataGet();
 
     Ui::form *ui;   //新增的
@@ -209,6 +213,7 @@ private:
     uint8_t is_data_up;
     uint32_t dataIndex;
     int32_t logSum;
+    int32_t historyDataSum;
 
     
     ReadOnlyDelegate* readOnlyDelegate;