📄 rtl8019.lst
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174 1 WriteReg(CR,((PrePage&0xC0) | CR_ABORT_COMPLETE_DMA | CR_START_COMMAND));
175 1 }
176 /* call this function to send a packet by RTL8019. packet store in ram
177 starts at 'buffer' and its size is 'size'. 'size' should not large than
C51 COMPILER V6.12 RTL8019 05/19/2009 14:55:39 PAGE 4
178 MAX_PACKET_SIZE or the excess data will be discard. */
179 BOOL RTLSendPacket(BYTE DT_XDATA * buffer,WORD size) REENTRANT_SIG
180 {
181 1 BYTE StartPage;
182 1 BYTE PrePage;
183 1
184 1 /* if send is already running */
185 1 if(InSending == TRUE)
186 1 return FALSE;
187 1 else
188 1 InSending = TRUE;
189 1 /* store page */
190 1 PrePage = ReadReg(CR);
191 1
192 1 /* check pakcet size */
193 1 if(size < MIN_PACKET_SIZE)
194 1 {
195 2 size = MIN_PACKET_SIZE;
196 2 }
197 1 else
198 1 {
199 2 if(size > MAX_PACKET_SIZE)
200 2 size = MAX_PACKET_SIZE;
201 2 }
202 1
203 1 /* write packet to ram */
204 1 if(LastSendStartPage == SEND_START_PAGE0)
205 1 {
206 2 StartPage = SEND_START_PAGE1;
207 2 LastSendStartPage = SEND_START_PAGE1;
208 2 }
209 1 else
210 1 {
211 2 StartPage = SEND_START_PAGE0;
212 2 LastSendStartPage = SEND_START_PAGE0;
213 2 }
214 1 RTLWriteRam((WORD)(((WORD)StartPage)<<8),size,buffer);
215 1
216 1 /* wait for last time trasmition to complete */
217 1 while((ReadReg(CR) & CR_TXP) == CR_TXP);
218 1
219 1 /* write trasmit start page and size */
220 1 RTLPage(0);
221 1 WriteReg(TPSR_WPAGE0,StartPage); /* TPSR */
222 1 WriteReg(TBCRL_WPAGE0,(BYTE)size);/*low */
223 1 WriteReg(TBCRH_WPAGE0,(BYTE)((size>>8)&0x00ff)); /*high*/
224 1 WriteReg(CR,((PrePage&0xC0) | CR_ABORT_COMPLETE_DMA | CR_TXP | CR_START_COMMAND));
225 1
226 1 InSending = FALSE;
227 1 return TRUE;
228 1 }
229
230 /* call this function to receive a ethernet packet from RTL8019.
231 return value:
232 NULL: no packet can receive yet.
233 not NULL:
234 a address point to MemHead. This Head contain merory
235 Imformation(memory start address, memory end address ...) of
236 received packet. Memory is allocated by function 'MemAllocate(WORD size)'.
237 a example of struct SMemHead is:
238
239 struct SMemHead
C51 COMPILER V6.12 RTL8019 05/19/2009 14:55:39 PAGE 5
240 {
241 BOOL used; // if in using
242 BYTE DT_XDATA *pStart; // the start address of memory
243 BYTE DT_XDATA *pEnd;
244 };
245
246 You can use your own struct SMemHead and MemAllocat function in your project.
247 */
248 struct SMemHead DT_XDATA * RTLReceivePacket() REENTRANT_SIG
249 {
250 1 BYTE curr,bnry;
251 1 WORD address;
252 1 WORD PacketSize;
253 1 struct SMemHead DT_XDATA *MemHead;
254 1
255 1 /* if send is running don't crrupt RTL register*/
256 1 if(InSending == TRUE)
257 1 return NULL;
258 1
259 1 MemHead = NULL;
260 1
261 1 RTLPage(1);
262 1 curr = ReadReg(CURR_RPAGE1);
263 1 RTLPage(0);
264 1
265 1 /* check if startpage exceed range becasue of unknow error */
266 1 if(StartPageOfPacket >= RECEIVE_STOP_PAGE || StartPageOfPacket < RECEIVE_START_PAGE)
267 1 {
268 2 /* use curr as the StartPageOfPacket in this case */
269 2 StartPageOfPacket = curr;
270 2 return NULL;
271 2 }
272 1
273 1 /* check if there is packets to read */
274 1 if(StartPageOfPacket == curr)
275 1 return NULL;
276 1
277 1 /*
278 1 * read a packet
279 1 */
280 1
281 1 /* read packet head imformation */
282 1 address = ((WORD)StartPageOfPacket)<<8;
283 1 RTLReadRam(address,4,Head);
284 1
285 1 /* check rsr, if isn't a good packet no read */
286 1 if(Head[0] & RSR_RECEIVE_NO_ERROR)
287 1 {
288 2 /* this is a good packet */
289 2
290 2 /* packet size, sub 4 bytes, this 4 byte is MAC checksum */
291 2 PacketSize = ((WORD)Head[3])*256 + Head[2] - 4;
292 2
293 2 /* allocate buffer and read packet into buffer */
294 2 if((MemHead = MemAllocate(PacketSize)) != NULL)
295 2 {
296 3 /* if packet is put from bnry+1 to receive_stop_page and receive
297 3 start page to next packet startpage, that is if bnry+1 > next
298 3 packet start page and next start page != receive_start_page,
299 3 we need read by two times. the first time from bnry+1 to receive
300 3 _stop_page, the second time from receive start page to next packet
301 3 startpage.
C51 COMPILER V6.12 RTL8019 05/19/2009 14:55:39 PAGE 6
302 3 */
303 3 address += 4;
304 3 if(StartPageOfPacket > Head[1] && Head[1] != RECEIVE_START_PAGE)
305 3 {
306 4 RTLReadRam(address,(WORD)((((WORD)RECEIVE_STOP_PAGE)<<8) - address),MemHead->pStart); /* read from rtl
- */
307 4 RTLReadRam((WORD)(((WORD)RECEIVE_START_PAGE)<<8),(WORD)(PacketSize - ((((WORD)RECEIVE_STOP_PAGE)<<8) -
- address)),
308 4 MemHead->pStart + ((((WORD)RECEIVE_STOP_PAGE)<<8) - address)); /* read from rtl */
309 4 }
310 3 else
311 3 {
312 4 RTLReadRam(address,PacketSize,MemHead->pStart); /* read from rtl */
313 4 }
314 3
315 3 }
316 2 }
317 1
318 1 /* get next packet start page */
319 1 StartPageOfPacket = Head[1];
320 1
321 1 /* reset bnry */
322 1 bnry = StartPageOfPacket - 1;
323 1 if(bnry < RECEIVE_START_PAGE)
324 1 bnry = RECEIVE_STOP_PAGE - 1;
325 1 WriteReg(BNRY_WPAGE0,bnry);
326 1
327 1 return MemHead;
328 1 }
329
330 /*void Start8019()
331 {
332 WriteReg(CR,CR_ABORT_COMPLETE_DMA | CR_START_COMMAND);
333 }
334
335 void Stop8019()
336 {
337 WriteReg(CR,CR_ABORT_COMPLETE_DMA | CR_STOP_COMMAND);
338 }*/
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1083 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 7 ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 4
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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