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《IAR EWARM 嵌入式系统 编程与实践》书中例程

__var _fileHandle;

execUserSetup() {
  __message "execUserSetup() called\n";
  // 打开文本InputData.txt文件读取ASCII码
  _fileHandle = __openFile( "$PROJ_DIR$\\InputData.txt", "r" );
  if( !_fileHandle ) {
    __message "could not open file" ;
  }
}

Access() {
  __message "Access() called\n";
  // 从文件中读取fib数列
  __var _fibValue;
  if( 0 == __readFile( _fileHandle, &_fibValue ) ) {
    UARTRBRTHR = _fibValue;
  }
  else {
    __message "error reading value from file";
  }
  __message "UARTRBR = 0x", _fibValue:%X,"\n";
}

execUserReset() {
  __message "execUserReset() called\n";
  if( _fileHandle ) {
    __resetFile( _fileHandle );
  }
}

execUserExit() {
  __message "execUserExit() called\n";
  __closeFile( _fileHandle );
}