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CC2640 OAD升级问题

Other Parts Discussed in Thread: CC2640

工程师们,你们好!我根据CC2640 BLE OAD User's Guide.pdf文档配置了imageA、imageB,将OAD_merge.hex烧录到了CC2640芯片中,将OADbin.bin通过云盘下载到iPod手机上的SimpleLink Starter中,然而升级的时候进度一直是0.0%,speed为0,这是什么原因呢?