当你把烧写了本bootloader的arduino第一次连接上PC时，上述测试命令可正常执行，但如果不重新插拔USB线，而直接再次运行这个测试命令的话，arduino不会有反应，命令会超时，原因是二次执行此命令时，板载的自动复位电路不会触发，从而导致bootloader无法得到执行。

Connect the board to the Arduino Uno. Open Arduino IDE and select Tools > Board > Arduino Uno. Go to Tools > Programmer > Arduino as ISP. Click Tools > Burn Bootloader to load the bootloader onto the ...

Since you have an AVR USBasp programmer in hand,is it possible to upload bootloader and/or program code to Arduino using the same USB asp programmer, instead of the proven methods described earlier?

So if you wanted to build your own PIC dev-board (like this one) you can use your Arduino to flash the bootloader. This post comes hot on the heels of the Arduino being used as a PIC 16F programmer.

Need more Arduino board? Do not spend more money for another one. Why not try to build your own DIY Arduino board? It is easy and simple. DIY Arduino Step 1 Get an Atmega328–PU or Atmega328P-PU (with ...

This fully compatible alternative to the Arduino bootloader requires an AVR ISP programmer to burn it to the chip on your Arduino.