Basic working principle of mobile phone Basic working principle of mobile phone Cui Jibin 2005 3 [pic] Shanghai Amoi Electronics Development Co., Ltd. All rights reserved 1. System block diagram 2. Hardware system block diagram 3. Software system block diagram AL ---- is mainly responsible for dispatching the message from UI layer to the specified window; UI ---- is mainly responsible for sending the message from PS layer to AL, or vice versa, sending the message from AL layer to PS. It can be seen that UI layer is just an intermediate layer between AL and PS layer, and its work is just responsible for forwarding messages. Only by introducing this layer can AL be shielded...
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