enc28j60+ethercard库的一使用上的改变和问题
本帖最后由 坤遠遊森林 于 2012-9-28 13:16 编辑之前用etherShield的库，跑通程序和硬件。
看了一下现在比较新的ethercard库，感觉调用函数的语句更精炼，阅读更方便，所以想使用这个库。
但是在运行Ethercard库的示例，上机无力。http://www.geek-workshop.com/thread-2044-1-1.html。具体为网络灯不亮，更像是中断/片选这类的问题。
所以翻阅比较了一下etherShield和ethercard里面的构建函数
发现：
etherShield里的enc28j60.h
#define ENC28J60_CONTROL_CS 10
#define SPI_MOSI 11
#define SPI_MISO 12
#define SPI_SCK 13
...
..
..
void enc28j60Init(uint8_t* macaddr)
{
// initialize I/O
// ss as output:
pinMode(ENC28J60_CONTROL_CS, OUTPUT);
CSPASSIVE; // ss=0
//
pinMode(SPI_MOSI, OUTPUT);
pinMode(SPI_SCK, OUTPUT);
pinMode(SPI_MISO, INPUT);
digitalWrite(SPI_MOSI, LOW);
digitalWrite(SPI_SCK, LOW);
/*DDRB|= 1<<PB3 | 1<<PB5; // mosi, sck output
cbi(DDRB,PINB4); // MISO is input
//
cbi(PORTB,PB3); // MOSI low
cbi(PORTB,PB5); // SCK low
*/
//
// initialize SPI interface
// master mode and Fosc/2 clock:
SPCR = (1<<SPE)|(1<<MSTR);
SPSR |= (1<<SPI2X);
// perform system reset
enc28j60WriteOp(ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET);
delay(50);
// check CLKRDY bit to see if reset is complete
// The CLKRDY does not work. See Rev. B4 Silicon Errata point. Just wait.
//while(!(enc28j60Read(ESTAT) & ESTAT_CLKRDY));
// do bank 0 stuff
// initialize receive buffer
// 16-bit transfers, must write low byte first
// set receive buffer start address
NextPacketPtr = RXSTART_INIT;
// Rx start
enc28j60Write(ERXSTL, RXSTART_INIT&0xFF);
enc28j60Write(ERXSTH, RXSTART_INIT>>8);
// set receive pointer address
enc28j60Write(ERXRDPTL, RXSTART_INIT&0xFF);
enc28j60Write(ERXRDPTH, RXSTART_INIT>>8);
// RX end
enc28j60Write(ERXNDL, RXSTOP_INIT&0xFF);
enc28j60Write(ERXNDH, RXSTOP_INIT>>8);
// TX start
enc28j60Write(ETXSTL, TXSTART_INIT&0xFF);
enc28j60Write(ETXSTH, TXSTART_INIT>>8);
// TX end
enc28j60Write(ETXNDL, TXSTOP_INIT&0xFF);
enc28j60Write(ETXNDH, TXSTOP_INIT>>8);
// do bank 1 stuff, packet filter:
// For broadcast packets we allow only ARP packtets
// All other packets should be unicast only for our mac (MAADR)
//
// The pattern to match on is therefore
// Type ETH.DST
// ARP BROADCAST
// 06 08 -- ff ff ff ff ff ff -> ip checksum for theses bytes=f7f9
// in binary these poitions are:11 0000 0011 1111
// This is hex 303F->EPMM0=0x3f,EPMM1=0x30
enc28j60Write(ERXFCON, ERXFCON_UCEN|ERXFCON_CRCEN|ERXFCON_PMEN);
enc28j60Write(EPMM0, 0x3f);
enc28j60Write(EPMM1, 0x30);
enc28j60Write(EPMCSL, 0xf9);
enc28j60Write(EPMCSH, 0xf7);
//
//
// do bank 2 stuff
// enable MAC receive
enc28j60Write(MACON1, MACON1_MARXEN|MACON1_TXPAUS|MACON1_RXPAUS);
// bring MAC out of reset
enc28j60Write(MACON2, 0x00);
// enable automatic padding to 60bytes and CRC operations
enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, MACON3, MACON3_PADCFG0|MACON3_TXCRCEN|MACON3_FRMLNEN);
// set inter-frame gap (non-back-to-back)
enc28j60Write(MAIPGL, 0x12);
enc28j60Write(MAIPGH, 0x0C);
// set inter-frame gap (back-to-back)
enc28j60Write(MABBIPG, 0x12);
// Set the maximum packet size which the controller will accept
// Do not send packets longer than MAX_FRAMELEN:
enc28j60Write(MAMXFLL, MAX_FRAMELEN&0xFF);
enc28j60Write(MAMXFLH, MAX_FRAMELEN>>8);
// do bank 3 stuff
// write MAC address
// NOTE: MAC address in ENC28J60 is byte-backward
enc28j60Write(MAADR5, macaddr);
enc28j60Write(MAADR4, macaddr);
enc28j60Write(MAADR3, macaddr);
enc28j60Write(MAADR2, macaddr);
enc28j60Write(MAADR1, macaddr);
enc28j60Write(MAADR0, macaddr);
// no loopback of transmitted frames
enc28j60PhyWrite(PHCON2, PHCON2_HDLDIS);
// switch to bank 0
enc28j60SetBank(ECON1);
// enable interrutps
enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, EIE, EIE_INTIE|EIE_PKTIE);
// enable packet reception
enc28j60WriteOp(ENC28J60_BIT_FIELD_SET, ECON1, ECON1_RXEN);
}
和 ethercard里的<enc28j60.cpp>
void ENC28J60::initSPI () {
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
const byte SPI_SS = 53;
const byte SPI_MOSI = 51;
const byte SPI_MISO = 50;
const byte SPI_SCK= 52;
#else
const byte SPI_SS = 10;
const byte SPI_MOSI = 11;
const byte SPI_MISO = 12;
const byte SPI_SCK= 13;
#endif
pinMode(SPI_SS, OUTPUT);
pinMode(SPI_MOSI, OUTPUT);
pinMode(SPI_SCK, OUTPUT);
pinMode(SPI_MISO, INPUT);
digitalWrite(SPI_MOSI, HIGH);
digitalWrite(SPI_MOSI, LOW);
digitalWrite(SPI_SCK, LOW);
SPCR = bit(SPE) | bit(MSTR); // 8 MHz @ 16
bitSet(SPSR, SPI2X);
}
...
...
...
byte ENC28J60::initialize (word size, const byte* macaddr, byte csPin) {
bufferSize = size;
if (bitRead(SPCR, SPE) == 0)
initSPI();
selectBit = csPin - 8;
bitSet(DDRB, selectBit);
disableChip();
writeOp(ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET);
delay(2); // errata B7/2
while (!readOp(ENC28J60_READ_CTRL_REG, ESTAT) & ESTAT_CLKRDY)
;
gNextPacketPtr = RXSTART_INIT;
writeReg(ERXST, RXSTART_INIT);
writeReg(ERXRDPT, RXSTART_INIT);
writeReg(ERXND, RXSTOP_INIT);
writeReg(ETXST, TXSTART_INIT);
writeReg(ETXND, TXSTOP_INIT);
enableBroadcast(); // change to add ERXFCON_BCEN recommended by epam
writeReg(EPMM0, 0x303f);
writeReg(EPMCS, 0xf7f9);
writeRegByte(MACON1, MACON1_MARXEN|MACON1_TXPAUS|MACON1_RXPAUS);
writeRegByte(MACON2, 0x00);
writeOp(ENC28J60_BIT_FIELD_SET, MACON3,
MACON3_PADCFG0|MACON3_TXCRCEN|MACON3_FRMLNEN);
writeReg(MAIPG, 0x0C12);
writeRegByte(MABBIPG, 0x12);
writeReg(MAMXFL, MAX_FRAMELEN);
writeRegByte(MAADR5, macaddr);
writeRegByte(MAADR4, macaddr);
writeRegByte(MAADR3, macaddr);
writeRegByte(MAADR2, macaddr);
writeRegByte(MAADR1, macaddr);
writeRegByte(MAADR0, macaddr);
writePhy(PHCON2, PHCON2_HDLDIS);
SetBank(ECON1);
writeOp(ENC28J60_BIT_FIELD_SET, EIE, EIE_INTIE|EIE_PKTIE);
writeOp(ENC28J60_BIT_FIELD_SET, ECON1, ECON1_RXEN);
byte rev = readRegByte(EREVID);
// microchip forgot to step the number on the silcon when they
// released the revision B7. 6 is now rev B7. We still have
// to see what they do when they release B8. At the moment
// there is no B8 out yet
if (rev > 5) ++rev;
return rev;
}
以及ethercard里的<enc28j60.c>
static uint8_t initialize (const uint16_t size, const uint8_t* macaddr,
uint8_t csPin =8);
...
...
...
static uint8_t doBIST(uint8_t csPin =8);
可见能够用ethershield里的cs和ethercard里的cs针脚定义是不同的，一个是10口，一个是8口。EC里的10口为ss，并且在int针口是cspin - 8，我也修改为cspin - 6
所以按照这个推论我又重新装接了针脚，28j60能够上机跑示例webclint，但是却又发生了一个串口监视器乱码的问题。头很大。
希望老师们能帮忙解决一下~~{:soso_e109:}
串口问题，听说是idebug你换别的波特率试试，我是用57600没问题，另外一个问题，你不要改库，改变你的接线，ss接D8就行了，如果你非要接10就用ether.begin(sizeof Ethernet::buffer, mymac，10)就ok了 zcbzjx 发表于 2012-9-27 17:44 static/image/common/back.gif
串口问题，听说是idebug你换别的波特率试试，我是用57600没问题，另外一个问题，你不要改库，改变你的接线， ...
:P
感谢老师，果然是波特率问题，我设置到9600，就没有乱码了~实在是太感谢了。
老师，有一个请求，能不能给做一个ethercard库的函数调用的方法和说明，虽然看库文件能理解一部分，但是有些函数的用法确实不清楚。实在很头疼。
最近又纠结于想做一个通过网络控制的小车，但是对这个想法有种束手无策的感觉。 波特率的问题~！
我之前也发现过:) 我也有些函数现在看不懂
我的办法是编译好的函数自己慢点去修改
看会产生什么不一样的效果
最后来确定函数的作用:( zhangdeyue1 发表于 2012-9-28 10:06 static/image/common/back.gif
我也有些函数现在看不懂
我的办法是编译好的函数自己慢点去修改
看会产生什么不一样的效果
我是在先研究示例，一点点改。
我觉得ethercard比以前的ethershield看起来简单多了。。还是有希望突破的
张老师昨天出了一个教程了~就是专门对付enc28j60的ethercard库，在那个原英文链接的网站，收获还不少 请问楼上提到的这个教程在什么地方啊？
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