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CC2541 oad img 注释add OAD

1.今天测试了下,官方里程,OAD升级,注释掉 add_oad service,即不添加OAD profile,发现BIM进行CRC校验错误,crc【1】一直是65535,请问是什么原因?

2.OAD升级的话,是否要求,imgA 、imgB都需要添加OAD profile?