/// <summary>
///
/// </summary>
/// <param name="switchFlag">true:打开，false:关闭</param>
public void setLCDBright(bool switchFlag)
{
if (iDevice < 0)
{
return;
}
//点亮或熄灭的标志，15-点亮，0-熄灭
if (switchFlag)
{
E7Lib.fw_lcd_setbright(iDevice, 15);
}
else
{
E7Lib.fw_lcd_setbright(iDevice, 0);
}
}