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https://github.com/itead/ITEADLIB_Arduino_Nextion.git
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add download API and download example
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zengpeng
239
NexDownload.cpp
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239
NexDownload.cpp
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/**
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* @file NexDown.cpp
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*
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* The implementation of class NexObject.
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*
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* @author Chen Zengpeng (email:<zengpeng.chen@itead.cc>)
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* @date 2016/3/29
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* @copyright
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* Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include "NexDownload.h"
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#include <SoftwareSerial.h>
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#ifdef USE_SOFTWARE_SERIAL
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SoftwareSerial dbSerial(3, 2); /* RX:D3, TX:D2 */
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#define DEBUG_SERIAL_ENABLE
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#endif
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#ifdef DEBUG_SERIAL_ENABLE
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#define dbSerialPrint(a) dbSerial.print(a)
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#define dbSerialPrintln(a) dbSerial.println(a)
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#define dbSerialBegin(a) dbSerial.begin(a)
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#else
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#define dbSerialPrint(a) do{}while(0)
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#define dbSerialPrintln(a) do{}while(0)
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#define dbSerialBegin(a) do{}while(0)
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#endif
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NexDownload::NexDownload(const char *file_name,const uint8_t SD_chip_select,uint32_t download_baudrate)
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{
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_file_name = file_name;
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_SD_chip_select = SD_chip_select;
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_download_baudrate = download_baudrate;
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}
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NexDownload::NexDownload(const String file_Name,const uint8_t SD_chip_select,uint32_t download_baudrate)
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{
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NexDownload(file_Name.c_str(),SD_chip_select,download_baudrate);
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}
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void NexDownload::startDownload(void)
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{
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dbSerialBegin(9600);
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if(!_checkFile())
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{
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dbSerialPrintln("the file is error");
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return;
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}
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if(_getBaudrate() == 0)
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{
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dbSerialPrintln("get baudrate error");
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return;
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}
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if(!_setDownloadBaudrate(_download_baudrate))
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{
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dbSerialPrintln("modify baudrate error");
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return;
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}
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if(!_downloadTftFile())
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{
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dbSerialPrintln("download file error");
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return;
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}
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dbSerialPrintln("download ok\r\n");
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}
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uint16_t NexDownload::_getBaudrate(void)
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{
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uint32_t baudrate_array[7] = {115200,19200,9600,57600,38400,4800,2400};
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for(uint8_t i = 0; i < 7; i++)
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{
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if(_searchBaudrate(baudrate_array[i]))
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{
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_baudrate = baudrate_array[i];
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dbSerialPrintln("get baudrate");
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break;
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}
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}
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return _baudrate;
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}
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bool NexDownload::_checkFile(void)
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{
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dbSerialPrintln("start _checkFile");
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if(!SD.begin(_SD_chip_select))
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{
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dbSerialPrintln("init sd failed");
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return 0;
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}
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if(!SD.exists(_file_name))
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{
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dbSerialPrintln("file is not exit");
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}
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_myFile = SD.open(_file_name);
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_undownloadByte = _myFile.size();
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dbSerialPrintln("tft file size is:");
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dbSerialPrintln(_undownloadByte);
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dbSerialPrintln("check file ok");
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return 1;
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}
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bool NexDownload::_searchBaudrate(uint32_t baudrate)
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{
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String string = String("");
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nexSerial.begin(baudrate);
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this->sendCommand("");
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this->sendCommand("connect");
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this->recvRetString(string);
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if(string.indexOf("comok") != -1)
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{
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return 1;
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}
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return 0;
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}
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void NexDownload::sendCommand(const char* cmd)
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{
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while (nexSerial.available())
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{
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nexSerial.read();
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}
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nexSerial.print(cmd);
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nexSerial.write(0xFF);
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nexSerial.write(0xFF);
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nexSerial.write(0xFF);
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}
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uint16_t NexDownload::recvRetString(String &string, uint32_t timeout,bool recv_flag)
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{
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uint16_t ret = 0;
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uint8_t c = 0;
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long start;
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bool exit_flag = false;
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start = millis();
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while (millis() - start <= timeout)
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{
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while (nexSerial.available())
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{
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c = nexSerial.read();
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if(c == 0)
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{
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continue;
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}
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string += (char)c;
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if(recv_flag)
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{
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if(string.indexOf(0x05) != -1)
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{
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exit_flag = true;
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}
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}
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}
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if(exit_flag)
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{
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break;
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}
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}
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ret = string.length();
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return ret;
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}
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bool NexDownload::_setDownloadBaudrate(uint32_t baudrate)
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{
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String string = String("");
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String cmd = String("");
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String filesize_str = String(_undownloadByte,10);
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String baudrate_str = String(baudrate,10);
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cmd = "whmi-wri " + filesize_str + "," + baudrate_str + ",0";
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dbSerialPrintln(cmd);
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this->sendCommand("");
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this->sendCommand(cmd.c_str());
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delay(50);
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nexSerial.begin(baudrate);
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this->recvRetString(string,500);
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if(string.indexOf(0x05) != -1)
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{
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return 1;
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}
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return 0;
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}
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bool NexDownload::_downloadTftFile(void)
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{
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uint8_t c;
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uint16_t send_timer = 0;
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uint16_t last_send_num = 0;
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String string = String("");
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send_timer = _undownloadByte / 4096 + 1;
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last_send_num = _undownloadByte % 4096;
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while(send_timer)
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{
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if(send_timer == 1)
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{
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for(uint16_t j = 1; j <= 4096; j++)
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{
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if(j <= last_send_num)
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{
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c = _myFile.read();
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nexSerial.write(c);
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}
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else
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{
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break;
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}
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}
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}
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else
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{
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for(uint16_t i = 1; i <= 4096; i++)
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{
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c = _myFile.read();
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nexSerial.write(c);
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}
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}
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this->recvRetString(string,500,true);
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if(string.indexOf(0x05) != -1)
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{
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string = "";
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}
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else
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{
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return 0;
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}
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--send_timer;
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}
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}
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142
NexDownload.h
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142
NexDownload.h
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@@ -0,0 +1,142 @@
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/**
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* @file NexDown.h
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*
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* The definition of class NexDown.
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*
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* @author Chen Zengpeng (email:<zengpeng.chen@itead.cc>)
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* @date 2016/3/29
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*
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* @copyright
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* Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#ifndef __NEXDOWNLOAD_H__
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#define __NEXDOWNLOAD_H__
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#include <Arduino.h>
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#include <SPI.h>
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#include <SD.h>
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#include "NexHardware.h"
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/**
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* @addtogroup CoreAPI
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* @{
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*/
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/**
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*
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* Provides the API for nextion to download the ftf file.
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*/
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class NexDownload
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{
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public: /* methods */
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/**
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* Constructor.
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*
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* @param file_name - tft file name.
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* @param SD_chip_select - sd chip select pin.
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* @download_baudrate - set download baudrate.
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*/
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NexDownload(const char *file_name,const uint8_t SD_chip_select,uint32_t download_baudrate);
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/**
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* Constructor.
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*
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* @param file_name - tft file name.
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* @param SD_chip_select - sd chip select pin.
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* @download_baudrate - set download baudrate.
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*/
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NexDownload(const String file_Name,const uint8_t SD_chip_select,uint32_t download_baudrate);
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/**
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* destructor.
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*
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*/
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~NexDownload(){}
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/*
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* start download.
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*
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* @return none.
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*/
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void startDownload();
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private: /* methods */
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/*
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* get communicate baudrate.
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*
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* @return communicate baudrate.
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*
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*/
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uint16_t _getBaudrate(void);
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/*
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* check tft file.
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*
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* @return true if success, false for failure.
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*/
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bool _checkFile(void);
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/*
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* search communicate baudrate.
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*
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* @param baudrate - communicate baudrate.
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*
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* @return true if success, false for failure.
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*/
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bool _searchBaudrate(uint32_t baudrate);
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/*
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* set download baudrate.
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*
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* @param baudrate - set download baudrate.
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*
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* @return true if success, false for failure.
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*/
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bool _setDownloadBaudrate(uint32_t baudrate);
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/**
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* start dowload tft file to nextion.
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*
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* @return none.
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*/
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bool _downloadTftFile(void);
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/*
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* Send command to Nextion.
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*
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* @param cmd - the string of command.
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*
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* @return none.
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*/
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void sendCommand(const char* cmd);
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/*
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* Receive string data.
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*
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* @param buffer - save string data.
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* @param timeout - set timeout time.
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* @param recv_flag - if recv_flag is true,will braak when receive 0x05.
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*
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* @return the length of string buffer.
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*
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*/
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uint16_t recvRetString(String &string, uint32_t timeout = 100,bool recv_flag = false);
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private: /* data */
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uint32_t _baudrate; /*nextion serail baudrate*/
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const char *_file_name; /*nextion tft file name*/
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File _myFile; /*nextion ftf file*/
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uint32_t _undownloadByte; /*undownload byte of tft file*/
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uint8_t _SD_chip_select; /*sd chip select pin*/
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uint32_t _download_baudrate; /*download baudrate*/
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};
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/**
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* @}
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*/
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#endif /* #ifndef __NEXDOWNLOAD_H__ */
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10
examples/CompDownload/ComDownload.ino
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10
examples/CompDownload/ComDownload.ino
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@@ -0,0 +1,10 @@
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#include "NexDownload.h"
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NexDownload nex_download("nex.tft",10,115200);
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void setup() {
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// put your setup code here, to run once:
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nex_download.startDownload();
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}
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void loop() {
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// put your main code here, to run repeatedly:
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}
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