Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit
Downloading via Ethernet
Downloading via Ethernet
If the hardware platform includes a network controller, then the boot loader can download the run-time image over Ethernet. Table 5-3 lists the functions that you must implement to support Ethernet-based communication.
Table 5-3 Ethernet support functions
| Function | Description |
|---|---|
| OEMReadData | Reads data from the transport for downloading. |
| OEMEthGetFrame | Reads data from the NIC using function pointer pfnEDbgGetFrame. |
| OEMEthSendFrame | Writes data to the NIC using function pointer pfnEDbfSendFrame. |
| OEMEthGetSecs | Returns number of seconds passed relative to a fixed time. |
The Ethernet support functions use callbacks into network controller-specific routines. This means that you must implement additional routines and set up appropriate function pointers in the OEMPlatformInit function if you want to support a different network controller, as demonstrated in the following sample code:
cAdaptType=pBootArgs->ucEdbgAdapterType;
// Set up EDBG driver callbacks based on
// Ethernet controller type.
switch (cAdaptType) {
case EDBG_ADAPTER_NE2000:
pfnEDbgInit = NE2000Init;
pfnEDbgInitDMABuffer = NULL;
pfnEDbgGetFrame = NE2000GetFrame;
pfnEDbgSendFrame = NE2000SendFrame;
break;
case EDBG_ADAPTER_DP83815:
pfnEDbgInit = DP83815Init;
pfnEDbgInitDMABuffer = DP83815InitDMABuffer;
pfnEDbgGetFrame = DP83815GetFrame;
...
}
Оглавление книги
- 12.1. Топология Ethernet-сетей
- Understanding Point-to-Point Protocol over Ethernet
- 5.5.1. Initialization via initcalls
- 15.5.1. Debugging via Serial Port
- 1.3.21 Ethernet Interface
- Ethernet Installation
- Documentation Available via FTP
- Documentation Available via WWW
- Ethernets
- Ethernet Autoprobing
- Ethernet Interfaces
- Fast Ethernet 100Base-FX