📄 uipavr.lst
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(0267) #define ISR_RST 7
(0268) #define ISR_OVW 4
(0269) #define ISR_PRX 0
(0270) #define ISR_RDC 6
(0271) #define ISR_PTX 1
(0272)
(0273)
(0274) /*****************************************************************************
(0275) *
(0276) * RTL Register Initialization Values
(0277) *
(0278) *****************************************************************************/
(0279) // RCR : accept broadcast packets and packets destined to this MAC
(0280) // drop short frames and receive errors
(0281) #define RCR_INIT 0x04
(0282)
(0283) // TCR : default transmit operation - CRC is generated
(0284) #define TCR_INIT 0x00
(0285)
(0286) // DCR : allows send packet to be used for packet retreival
(0287) // FIFO threshold: 8-bits (works)
(0288) // 8-bit transfer mode
(0289) #define DCR_INIT 0x58
(0290)
(0291) // IMR : interrupt enabled for receive and overrun events
(0292) #define IMR_INIT 0x11
(0293)
(0294) // buffer boundaries - transmit has 6 256-byte pages
(0295) // receive has 26 256-byte pages
(0296) // entire available packet buffer space is allocated
(0297) #define TXSTART_INIT 0x40
(0298) #define RXSTART_INIT 0x46
(0299) #define RXSTOP_INIT 0x60
(0300)
(0301)
(0302)
(0303) void rtl8019BeginPacketSend(unsigned int packetLength)
(0304) {
(0305) unsigned int sendPacketLength;
(0306) sendPacketLength = (packetLength>=ETHERNET_MIN_PACKET_LENGTH) ?
1554 330C CPI R16,0x3C
1555 E0E0 LDI R30,0
1556 071E CPC R17,R30
1557 F010 BCS 0x155A
1558 0168 MOVW R12,R16
1559 C003 RJMP 0x155D
155A E38C LDI R24,0x3C
155B E090 LDI R25,0
155C 016C MOVW R12,R24
155D 0156 MOVW R10,R12
(0307) packetLength : ETHERNET_MIN_PACKET_LENGTH ;
(0308)
(0309) //start the NIC
(0310) rtl8019Write(CR,0x22);
155E E282 LDI R24,0x22
155F 9380C000 STS 0xC000,R24
(0311)
(0312) // still transmitting a packet - wait for it to finish
(0313) while( rtl8019Read(CR) & 0x04 );
1561 9020C000 LDS R2,0xC000
1563 FC22 SBRC R2,2
1564 CFFC RJMP 0x1561
(0314)
(0315) //load beginning page for transmit buffer
(0316) rtl8019Write(TPSR,TXSTART_INIT);
1565 E480 LDI R24,0x40
1566 9380C400 STS 0xC400,R24
(0317)
(0318) //set start address for remote DMA operation
(0319) rtl8019Write(RSAR0,0x00);
1568 2422 CLR R2
1569 9220C800 STS 0xC800,R2
(0320) rtl8019Write(RSAR1,0x40);
156B E480 LDI R24,0x40
156C 9380C900 STS 0xC900,R24
(0321)
(0322) //clear the packet stored interrupt
(0323) rtl8019Write(ISR,(1<<ISR_PTX));
156E E082 LDI R24,2
156F 9380C700 STS 0xC700,R24
(0324)
(0325) //load data byte count for remote DMA
(0326) rtl8019Write(RBCR0, (unsigned char)(packetLength));
1571 9300CA00 STS 0xCA00,R16
(0327) rtl8019Write(RBCR1, (unsigned char)(packetLength>>8));
1573 0118 MOVW R2,R16
1574 2C23 MOV R2,R3
1575 2433 CLR R3
1576 9220CB00 STS 0xCB00,R2
(0328)
(0329) rtl8019Write(TBCR0, (unsigned char)(sendPacketLength));
1578 92A0C500 STS 0xC500,R10
(0330) rtl8019Write(TBCR1, (unsigned char)((sendPacketLength)>>8));
157A 0115 MOVW R2,R10
157B 2C23 MOV R2,R3
157C 2433 CLR R3
157D 9220C600 STS 0xC600,R2
(0331)
(0332) //do remote write operation
(0333) rtl8019Write(CR,0x12);
157F E182 LDI R24,0x12
1580 9380C000 STS 0xC000,R24
1582 940E2E66 CALL pop_gset4x
1584 9508 RET
_rtl8019SendPacketData:
i --> R10
length --> R18
localBuffer --> R16
1585 940E2E6C CALL push_gset3x
(0334) }
(0335)
(0336)
(0337)
(0338) void rtl8019SendPacketData(unsigned char * localBuffer, unsigned int length)
(0339) {
(0340) unsigned int i;
(0341)
(0342) for(i=0;i<length;i++)
1587 24AA CLR R10
1588 24BB CLR R11
1589 C009 RJMP 0x1593
(0343) rtl8019Write(RDMAPORT, localBuffer[i]);
158A 01F5 MOVW R30,R10
158B 0FE0 ADD R30,R16
158C 1FF1 ADC R31,R17
158D 8020 LDD R2,Z+0
158E 9220D000 STS 0xD000,R2
1590 01C5 MOVW R24,R10
1591 9601 ADIW R24,1
1592 015C MOVW R10,R24
1593 16A2 CP R10,R18
1594 06B3 CPC R11,R19
1595 F3A0 BCS 0x158A
1596 940E2E5A CALL pop_gset3x
1598 9508 RET
(0344) }
(0345)
(0346)
(0347)
(0348) void rtl8019EndPacketSend(void)
(0349) {
(0350) //send the contents of the transmit buffer onto the network
(0351) rtl8019Write(CR,0x24);
_rtl8019EndPacketSend:
1599 E284 LDI R24,0x24
159A 9380C000 STS 0xC000,R24
(0352)
(0353) // clear the remote DMA interrupt
(0354) rtl8019Write(ISR, (1<<ISR_RDC));
159C E480 LDI R24,0x40
159D 9380C700 STS 0xC700,R24
159F 9508 RET
_rtl8019BeginPacketRetreive:
rxlen --> R10
pageheader --> Y+0
bnry --> R12
i --> R10
15A0 940E2E6F CALL push_gset4x
15A2 9724 SBIW R28,4
(0355) }
(0356)
(0357)
(0358)
(0359)
(0360) // pointers to locations in the RTL8019 receive buffer
(0361) static unsigned char nextPage;
(0362) static unsigned int currentRetreiveAddress;
(0363)
(0364) // location of items in the RTL8019's page header
(0365) #define enetpacketstatus 0x00
(0366) #define nextblock_ptr 0x01
(0367) #define enetpacketLenL 0x02
(0368) #define enetpacketLenH 0x03
(0369)
(0370) unsigned int rtl8019BeginPacketRetreive(void)
(0371) {
(0372) unsigned char i;
(0373) unsigned char bnry;
(0374)
(0375) unsigned char pageheader[4];
(0376) unsigned int rxlen;
(0377)
(0378) // check for and handle an overflow
(0379) rtl8019ProcessInterrupt();
15A3 D19D RCALL _rtl8019ProcessInterrupt
(0380)
(0381) // read CURR from page 1
(0382) rtl8019Write(CR,0x62);
15A4 E682 LDI R24,0x62
15A5 9380C000 STS 0xC000,R24
(0383) i = rtl8019Read(CURR);
15A7 90A0C700 LDS R10,0xC700
(0384)
(0385) // return to page 0
(0386) rtl8019Write(CR,0x22);
15A9 E282 LDI R24,0x22
15AA 9380C000 STS 0xC000,R24
(0387)
(0388) // read the boundary register - pointing to the beginning of the packet
(0389) bnry = rtl8019Read(BNRY) ;
15AC 90C0C300 LDS R12,0xC300
(0390)
(0391) // return if there is no packet in the buffer
(0392) if( bnry == i )
15AE 14CA CP R12,R10
15AF F419 BNE 0x15B3
(0393) return 0;
15B0 2700 CLR R16
15B1 2711 CLR R17
15B2 C05E RJMP 0x1611
(0394)
(0395)
(0396) // clear the packet received interrupt flag
(0397) rtl8019Write(ISR, (1<<ISR_PRX));
15B3 E081 LDI R24,1
15B4 9380C700 STS 0xC700,R24
(0398)
(0399) // the boundary pointer is invalid, reset the contents of the buffer and exit
(0400) if( (bnry >= RXSTOP_INIT) || (bnry < RXSTART_INIT) )
15B6 2D8C MOV R24,R12
15B7 3680 CPI R24,0x60
15B8 F410 BCC 0x15BB
15B9 3486 CPI R24,0x46
15BA F478 BCC 0x15CA
(0401) {
(0402) rtl8019Write(BNRY, RXSTART_INIT);
15BB E486 LDI R24,0x46
15BC 9380C300 STS 0xC300,R24
(0403) rtl8019Write(CR, 0x62);
15BE E682 LDI R24,0x62
15BF 9380C000 STS 0xC000,R24
(0404) rtl8019Write(CURR, RXSTART_INIT);
15C1 E486 LDI R24,0x46
15C2 9380C700 STS 0xC700,R24
(0405) rtl8019Write(CR, 0x22);
15C4 E282 LDI R24,0x22
15C5 9380C000 STS 0xC000,R24
(0406)
(0407) return 0;
15C7 2700 CLR R16
15C8 2711 CLR R17
15C9 C047 RJMP 0x1611
(0408) }
(0409)
(0410) // initiate DMA to transfer the RTL8019 packet header
(0411) rtl8019Write(RBCR0, 4);
15CA E084 LDI R24,4
15CB 9380CA00 STS 0xCA00,R24
(0412) rtl8019Write(RBCR1, 0);
15CD 2422 CLR R2
15CE 9220CB00 STS 0xCB00,R2
(0413) rtl8019Write(RSAR0, 0);
15D0 2422 CLR R2
15D1 9220C800 STS 0xC800,R2
(0414) rtl8019Write(RSAR1, bnry);
15D3 92C0C900 STS 0xC900,R12
(0415) rtl8019Write(CR, 0x0A);
15D5 E08A LDI R24,0xA
15D6 9380C000 STS 0xC000,R24
(0416) for(i=0;i<4;i++)
15D8 24AA CLR R10
15D9 C009 RJMP 0x15E3
(0417) pageheader[i] = rtl8019Read(RDMAPORT);
15DA 01CE MOVW R24,R28
15DB 2DEA MOV R30,R10
15DC 27FF CLR R31
15DD 0FE8 ADD R30,R24
15DE 1FF9 ADC R31,R25
15DF 9020D000 LDS R2,0xD000
15E1 8220 STD Z+0,R2
15E2 94A3 INC R10
15E3 2D8A MOV R24,R10
15E4 3084 CPI R24,4
15E5 F3A0 BCS 0x15DA
(0418)
(0419) // end the DMA operation
(0420) rtl8019Write(CR, 0x22);
15E6 E282 LDI R24,0x22
15E7 9380C000 STS 0xC000,R24
(0421) for(i = 0; i <= 20; i++)
15E9 24AA CLR R10
15EA C006 RJMP 0x15F1
(0422) if(rtl8019Read(ISR) & 1<<6)
15EB 9020C700 LDS R2,0xC700
15ED FE26 SBRS R2,6
15EE C001 RJMP 0x15F0
(0423) break;
15EF C004 RJMP 0x15F4
15F0 94A3 INC R10
15F1 E184 LDI R24,0x14
15F2 158A CP R24,R10
15F3 F7B8 BCC 0x15EB
(0424) rtl8019Write(ISR, 1<<6);
15F4 E480 LDI R24,0x40
15F5 9380C700 STS 0xC700,R24
(0425)
(0426)
(0427) rxlen = (pageheader[enetpacketLenH]<<8) + pageheader[enetpacketLenL];
15F7 802A LDD R2,Y+2
15F8 803B LDD R3,Y+3
15F9 2CB3 MOV R11,R3
15FA 2CA2 MOV R10,R2
(0428) nextPage = pageheader[nextblock_ptr] ;
15FB 8029 LDD R2,Y+1
15FC 92202A0A STS nextPage,R2
(0429)
(0430) currentRetreiveAddress = (bnry<<8) + 4;
15FE E084 LDI R24,4
15FF 2C3C MOV R3,R12
1600 2E28 MOV R2,R24
1601 92302A09 STS currentRetreiveAddress+1,R3
1603 92202A08 STS currentRetreiveAddress,R2
(0431)
(0432) // if the nextPage pointer is invalid, the packet is not ready yet - exit
(0433) if( (nextPage >= RXSTOP_INIT) || (nextPage < RXSTART_INIT) )
1605 91802A0A LDS R24,nextPage
1607 3680 CPI R24,0x60
1608 F410 BCC 0x160B
1609 3486 CPI R24,0x46
160A F418 BCC 0x160E
(0434) return 0;
160B 2700 CLR R16
160C 2711 CLR R17
160D C003 RJMP 0x1611
(0435)
(0436) return rxlen-4;
160E 0185 MOVW R16,R10
160F 5004 SUBI R16,4
1610 4010 SBCI R17,0
1611 9624 ADIW R28,4
1612 940E2E66 CALL pop_gset4x
1614 9508 RET
_rtl8019RetreivePacketData:
i --> R10
length --> R18
localBuffer --> R16
1615 940E2E6C CALL push_gset3x
(0437) }
(0438)
(0439)
(0440) void rtl8019RetreivePacketData(unsigned char * localBuffer, unsigned int length)
(0441) {
(0442) unsigned int i;
(0443)
(0444) // initiate DMA to transfer the data
(0445) rtl8019Write(RBCR0, (unsigned char)length);
1617 9320CA00 STS 0xCA00,R18
(0446) rtl8019Write(RBCR1, (unsigned char)(length>>8));
1619 0119 MOVW R2,R18
161A 2C23 MOV R2,R3
161B 2433 CLR R3
161C 9220CB00 STS 0xCB00,R2
(0447) rtl8019Write(RSAR0, (unsigned char)currentRetreiveAddress);
161E 90202A08 LDS R2,currentRetreiveAddress
1620 90302A09 LDS R3,currentRetreiveAddress+1
1622 9220C800 STS 0xC800,R2
(0448) rtl8019Write(RSAR1, (unsigned char)(currentRetreiveAddress>>8));
1624 90202A08 LDS R2,currentRetreiveAddress
1626 90302A09 LDS R3,currentRetreiveAddress+1
1628 2C23 MOV R2,R3
1629 2433 CLR R3
162A 9220C900 STS 0xC900,R2
(0449) rtl8019Write(CR, 0x0A);
162C E08A LDI R24⌨️ 快捷键说明
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