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如果你想在host MPU上实现对ZNP固件升级,请参考zigbee linux gateway里面的sbl_tool工程代码,这个是支持ZNP通过UART来OTA升级固件的,经过调试,和传统的wireless升级OTA不同,sbl tool来对OTA升级速度非常快,一分钟能完成整个492KB的CC2538ZNP-without-SBL.bin固件升级。