适用于ARDUINO ATMEGA 2560和ADK的USB和SDCARD固件正在闪烁 主分支是sdcard闪存bootloader_from_flash是spi芯片的闪存 机械师 引导程序在eeprom中寻找地址0x1FF处的字节： -if it is set to 0xF0 bootloader will look for a bin file on the sdcard named firmware.bin and use it to flash the firmware then