/*

                           e Y8b    Y8b YV1.08P888 88e
                          d8b Y8b    Y8b Y888P 888 888D
                         d888b Y8b    Y8b Y8P  888 88"
                        d888WuHan8b    Y8b Y   888 b,
                       d8888888b Y8b    Y8P    888 88b,
           8888 8888       ,e,                                  888
           8888 888820078e  " Y8b Y888P ,e e, 888,8, dP"Y ,"Y88b888
           8888 8888888 88b888 Y8b Y8P d88 88b888 " C88b "8" 888888
           8888 8888888 888888  Y8b "  888   ,888    Y88D,ee 888888
           'Y88 88P'888 888888   Y8P    "YeeP"888   d,dP "88 888888
   888 88b,                    d8  888                     888
   888 88P' e88 88e  e88 88e  d88  888 e88 88e  ,"Y88b e88 888 ,e e, 888,8,
   888 8K  d888 888bd888 8Shaoziyang88d888 888b"8" 888d888 888d88 88b888 "
   888 88b,Y888 888PY888 888P 888  888Y888 888P,ee 888Y888 888888   ,888
   888 88P' "88 88"  "88 88"  888  888 "88 88" "88 888 "88 888 "YeeP"888
                                ___           ___
                  ___          /  /\         /  /\      ___
                 /__/\        /  /::\       /  /::\    /__/\
                 \  \:\      /  /:/\:\     /__/:/\:\   \  \:\
                  \__\:\    /  /::\ \:\   _\_ \:\ \:\   \__\:\
                  /  /::\  /__/:/\:\ \:\ /__/\ \:\ \:\  /  /::\
                 /  /:/\:\ \  \:\ \:\_\/ \  \:\ \:\_\/ /  /:/\:\
                /  /:/__\/  \  \:\ \:\    \  \:\_\:\  /  /:/__\/
               /__/:/        \  \:\_\/     \  \:\/:/ /__/:/
               \__\/          \  \:\        \  \::/  \__\/
                               \__\/         \__\/

  Project:       AVR Universal BootLoader Test
                 AVR 通用 Bootloader 測試
  File:          test.c
                 定時向串口輸出一個字符(默認是'>')。如果接收到字符，則將接收的
                 字符作為輸出。收到'~'時進入死循環，等待看門狗復位。這個程序用
                 于測試串口通信是否正常。可以使用超級終端作為上位機的軟件。
  Version:       2.0

  Compiler:      WinAVR 20071221 + AVR Studio 4.14.589

  Author:        Shaoziyang
                 Shaoziyang@gmail.com
                 http://avrubd.googlepages.com
                 http://groups.google.com/group/avrub?hl=en

  Date:          2008.4

*/

#include "testcfg.h"
#include "bootldr.h"

#define PROG_START         0x0000

unsigned char dat = '>';

//寫入數據到串口
void WriteCom(unsigned char dat)
{
#if RS485
  RS485Enable();
#endif

  UDRREG(COMPORTNo) = dat;
  while(!(UCSRAREG(COMPORTNo) & (1<<TXCBIT(COMPORTNo))));
  UCSRAREG(COMPORTNo) |= (1 << TXCBIT(COMPORTNo));

#if RS485
  RS485Disable();
#endif
}

int main()
{
  asm volatile("cli": : );

#if WDG_En
  //允許看門狗
  wdt_enable(WDTO_1S);
#endif

  ComInit();
  TimerInit();

#if RS485
  DDRREG(RS485PORT) |= (1 << RS485TXEn);
  RS485Disable();
#endif

#if LED_En
  //設置LED端口為輸出狀態
  DDRREG(LEDPORT) |= (1 << LEDPORTNo);
#endif

  while(1)
  {
#if WDG_En
    //清除看門狗
    wdt_reset();
#endif

    if(TIFRREG & (1<<OCF1A))    //T1溢出
    {
      TIFRREG |= (1 << OCF1A);

#if LED_En
      //改變LED狀態
      LEDAlt();
#endif

      if(DataInCom())
      {
        dat = ReadCom();
        if(dat == '~')
#if WDG_En
          while(1);             //死循環，等待復位
#else
          (*((void(*)(void))PROG_START))();  //跳轉到開始
#endif
      }
      WriteCom(dat);
    }
  }
}

//End of file: test.c