test.c

在Iccavr软件平台上

/*

                           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 测试
  File:          test.c
                 定时向串口输出一个字符(默认是'>')。如果接收到字符，则将接收的
                 字符作为输出。收到'~'时进入死循环，等待看门狗复位。这个程序用
                 于测试串口通信是否正常。可以使用超级终端作为上位机的软件。
  Version:       2.0

  Compiler:      WinAVR 20071221 + AVR Studio 4.14.589

  Author:        Shaoziyang
                 [e-mail]
                 http://avrubd.googlepages.com
                 http://sourceforge.net/projects/avrub

  Date:          2008.4

*/

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

#define PROG_START         0x0000

unsigned char dat = '>';

//写入数据到串口
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
  //允许看门狗
  wdt_enable(WDTO_1S);
#else
  //关闭看门狗
  MCUSR = 0;
  wdt_disable();
#endif

  ComInit();
  TimerInit();

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

#if LED_En
  //设置LED端口为输出状态
  DDRREG(LEDPORT) = (1 << LEDPORTNo);
#endif

  while(1)
  {
#if WDG_En
    //清除看门狗
    wdt_reset();
#endif

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

#if LED_En
      //改变LED状态
      LEDAlt();
#endif

      if(DataInCom())
      {
        dat = ReadCom();
        if(dat == '~')
#if WDG_En
          while(1);             //死循环，等待复位
#else
          (*((void(*)(void))PROG_START))();  //跳转到开始
#endif
      }
      WriteCom(dat);
    }
  }
}

//End of file: test.c