C语言PIC18 serial bootloader和C#语言bootloader PC端串口通信程序

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　　新PIC18 Bootloader

　　PhsBoot_v3.0是我最新用C语言实现的PIC bootloader, 采用串口通信，适用于PIC18, 并为其用C#写了PC端通信程序PhsLoader_v3.0。PhsLoader_v3.0通过串口按照自定义的通信协定发送数据PhsBoot_v3.0, PhsBoot_v3.0接收数据，按照通信协定解读数据，解读出其中Hex数据，并将其烧录到正确的位置。

　　通信协定

　　PIC18单片机端PhsBoot_v3.0和PC端PhsLoader_v3.0之间的通信数据包采用以下协定

<STX><CMD><ADDRL><ADDRH><ADDRU><LEN><DATA>...<DATA><ETX>

　　定义如下:

STX - Start of packet indicator
ETX - End of packet indicator
LEN - The length of true data
DATA - General data 16 bytes, only first LEN of datas are true
CMD - Base command
ADDR - Address up to 24 bits  ( ADDRL , ADDRH , ADDRH)

　　具体有以下Base command:

RD-VER:  0x00 -- Read Version Information (最终版本删除了此命令)
RD_MEM： 0x01 -- Read Program Memory (最终版本删除了此命令)
ER_MEM: 0x03 -- Erase Program Memory
WR_MEM： 0x02 -- Write Program Memory
WR_CFG： 0x04 -- Write Configuration Registers

　　PhsLoader_v3.0 功能

　　定义好了通讯协定, 接着就按照协定去实现PhsLoader_v3.0。 PhsLoader_v3.0的具体功能包括选择COM端口和BAUD RATE, 连接COM, 加载应用程序Hex文件，Parse 应用程序的Hex文件，一行一行解读Hex文件，然后按照通讯协定通过串口发送Hex记录到单片机，接收单片机发送回来的Response，发送完毕后断开COM连接，发送期间出现问题就立马结束发送。

　　PhsLoader_v3.0 主要代码段

　　PhsLoader_v3.0是用C#实现的，是我在利用空余时间自学C#后写的，上面提到的功能都实现了。

        private void btnDownload_Click(object sender, EventArgs e)
        {
            btnDownload.Enabled = false;
            pBarLoading.Visible = false;

            if (!this.connect())
            {
                btnDownload.Enabled = true;
                return;
            }

            try
            {
                loaderReader = new StreamReader(textBoxFile.Text);

            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error: " + ex.Message);
                textBoxStatus.ForeColor = Color.Red;
                textBoxStatus.AppendText("Read hex file unsuccessfully\r\n");
                textBoxStatus.ForeColor = Color.Black;
                loaderReader.Close();
                loaderSerial.Close();
                btnDownload.Enabled = true;
                return;
            }

            loaderFrame = new SerialFrame();
            if (!erase())
            {
                textBoxStatus.ForeColor = Color.Red;
                textBoxStatus.AppendText("Erase unsuccessfully\r\n");
                textBoxStatus.ForeColor = Color.Black;
                loaderReader.Close();
                loaderSerial.Close();
                btnDownload.Enabled = true;
                return;
            }

            pBarLoading.Refresh();
            pBarLoading.Visible = true;
            pBarLoading.Value = 0;
            pBarLoading.Maximum = loaderLines;
            pBarLoading.Step = 1;

            string recordLine;
            Address_U = 0;
            bool isNextLineUserID = false;
            bool isNextLineConfigBits = false;
            textBoxStatus.AppendText("\r\nDownloading hex file ...\r\n");
            try
            {
                while (loaderReader.Peek() >= 0)
                {
                    pBarLoading.PerformStep();
                    recordLine = loaderReader.ReadLine();
                    //if (recordLine.Contains(USER_ID_TOKEN) == true)
                    //{
                    //    isNextLineUserID = true;
                    //    continue;
                    //}
                    //else if (recordLine.Contains(CONFIG_BITS_TOKEN) == true)
                    //{
                    //    isNextLineConfigBits = true;
                    //    continue;
                    //}
                    if (recordLine.Contains(EXTEND_TOKEN) == true)
                    {
                        if (recordLine.Contains(USER_ID_TOKEN) == true)
                        {
                            isNextLineUserID = true;
                            continue;
                        }
                        else if (recordLine.Contains(CONFIG_BITS_TOKEN) == true)
                        {
                            isNextLineConfigBits = true;
                            continue;
                        }
                        else
                        {
                            const int ADDR_U_START_INDEX = 9;
                            const int ADDR_U_LENGTH = 4;
                            string addrU = recordLine.Substring(ADDR_U_START_INDEX, ADDR_U_LENGTH);
                            Address_U = Convert.ToInt32(addrU, 16) << 16;
                            continue;
                        }
                    }
                    else if (recordLine.Contains(END_OF_HEX_FILE_TOKEN) == true)
                    {
                        break;
                    }
                    if (isNextLineUserID)
                    {
                        isNextLineUserID = false;
                        // do nothing;
                    }
                    else if (isNextLineConfigBits)
                    {
                        if (!DownloadConfigLine(recordLine))
                        {
                            Debug.WriteLine("Error found during configuration bits programming");
                            loaderReader.Close();
                            loaderSerial.Close();
                            btnDownload.Enabled = true;
                            return;
                        }
                        isNextLineConfigBits = false;
                    }
                    else
                    {
                        //if (recordLine.Contains(J_TYPE_CONFIG_BITS_TOKEN) == true && Address_U == 0x10000)
                        //{
                        //    continue;
                        //}
                        /*else*/ 
                        if (!DownloadDataLine(recordLine))
                        {
                            Debug.WriteLine("Error found during data programming");
                            loaderReader.Close();
                            loaderSerial.Close();
                            btnDownload.Enabled = true;
                            return;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Error: " + ex.Message);
                textBoxStatus.ForeColor = Color.Red;
                textBoxStatus.AppendText("Downloading failed\r\n");
                textBoxStatus.ForeColor = Color.Black;
                loaderSerial.Close();
                loaderReader.Close();
                btnDownload.Enabled = true;
                return;
            }
            textBoxStatus.AppendText("Downloading completed\r\n");

            if (!run())
            {
                textBoxStatus.ForeColor = Color.Red;
                textBoxStatus.AppendText("Jump to Application unsuccessfully\r\n");
                textBoxStatus.ForeColor = Color.Black;
                loaderReader.Close();
                loaderSerial.Close();
                btnDownload.Enabled = true;
                return;
            }
            loaderSerial.Close();
            loaderReader.Close();
            btnDownload.Enabled = true;
        }

View Code