| The long-distance transmission of the data is made possible through the embedded underwater acoustic equipments with the Embedded Ethernet Technology. In this thesis, after analyzing the characteristics of the current Embedded Ethernet Technology, two different Schemes of Embedded Ethernet Communication Solutions are presented: the first (Scheme A) basing on the Micro Control Unit (MCU) chip plus the Ethernet Control chip with Media Access Control (MAC) and Physical layer (PHY) function, withμC/OS as its operating system and lightweight TCP/IP Stack (LwIP) as its communication protocol; the second (Scheme B) basing on the MCU + network microcontroller, with built-in firmware to work as the Ethernet Protocol Stack and using the built-in API Function Development Software to transfer the data via the Ethernet. In conclusion, the performance and characteristics of the two Schemes are presented.After analyzing the various common Embedded Ethernet Control chips, different solutions are adopted for either of the two Schemes: in Scheme A TMS320VC5509A (DSP) + LAN91C111 (Non-PCI Ethernet Single Chip) are adopted and in Scheme B TMS320VC5509A + DS80C410 (network microcontroller) + LXT972ALC (PHY chip).In Scheme A, common Embedded Real-Time Operating Systems (RTOSs) and several open source TCP/IP protocol stacks are analyzed and considering the hardware environment, the open source embedded RTOSμC/OS-II and the open source lightweight TCP/IP Stack (LwIP) are adopted. The Ethernet communication is realized through adoptingμC/OS-II and LwIP and coding an LAN91C111 driver. In Scheme B, the Ethernet communication is realized through development of the firmware. |
PDF Full Text Request