嵌入式系統期中報告

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1 嵌入式系統期中報告 ENC28J60 使用 SPI 的獨立乙太網路控制器指導老師 : 陳慶瀚教授學號 : 姓名 : 曾錦華

2 目錄一 ENC28J60 硬體週邊原理介紹原理介紹 ENC28J60 由七个主要功能模組组成... 3 二 SIOC 的 Driver 設計及主要程式說明 Main.c Spi.c WebServer.c ENC28J60.C ir_arp_udp_tcp.c 三 SIOC 與 ENC28J60 的接線圖四 SIOC 驗證... 13

3 一 ENC28J60 硬體週邊原理介紹 1 原理介紹 A. ENC28J60 是帶有業界標準串列周邊介面 (Serial Peripheral Interface,SPI) 的獨立乙太網控制器它可作為任何配備有 SPI 的控制器的乙太網介面 B. ENC28J60 符合 IEEE 的全部規範, 採用了一系列包過慮機制以對傳入數據封包進行限制它還提供了一个内部 DMA 模組, 以實現快速數據吞吐和硬體支持的 IP 驗証和計算與主控制器的通信通過兩個中斷引脚和 SPI 實現, 數據傳輸速率高達 10 Mb/s 兩個專用的引脚用於連接 LED, 進行網路活動狀態指示 C. 下圖為 ENC28J60 的架構圖 2 ENC28J60 由七个主要功能模組組成 : A. SPI 接口扮演主控制器和 ENC28J60 之間通信通道 B. 控制寄存器用於控制和監視 ENC28J60 C. 双端口 RAM 緩衝器用於接收和發送數據包 D. 判優器當 DMA 發送和接收模組發出請求時對 RAM 緩衝器的訪問進行控制 E. 總線接口對通过 SPI 接收的數據和命令進行解析 F. MAC (Medium Access Control) 模組實現符合 IEEE 標準的 MAC 邏輯 G. PHY( 物理層 ) 模組對雙絞線上的模擬數據進行編碼和解碼 ENC28J60 架構圖

4 二 SIOC 的 Driver 設計及主要程式說明 1 Main.c int main(void) int rev; printf("set_system... \r\n"); /* System clocks configuration */ Set_System(); getchar(); printf("rcc_configuration... \r\n"); RCC_Configuration(); /* SPI1 configuration */ printf("spi1& GPIO configuration... \r\n"); SPI1_Init(); printf("webserver start... \r\n\n"); WebServer(); return rev; void RCC_Configuration(void) /* PCLK2 = HCLK/2 */ RCC_PCLK2Config(RCC_HCLK_Div2); /* Enable peripheral clocks */ /* GPIOA, GPIOB and SPI1 clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA RCC_APB2Periph_GPIOB RCC_APB2Periph_SPI1, ENABLE); /* SPI2 Periph clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);

5 2 Spi.c void SPI1_Init(void) SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; /* Configure SPI2 pins: NSS, SCK, MISO and MOSI */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 GPIO_Pin_14 GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure SPI1 pins: NSS, SCK, MISO and MOSI */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /* SPI2 configuration */ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //spi 傳輸模式, 全雙工 SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //SPI operating mode SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //SPI data size 8b or 16b SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //SPI_CPOL selects the serial clock steady state SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //the clock active edge for the bit capture //specifies whether the NSS signal is managed by hardware (NSS pin) or by software using the SSI bit SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //define the Baud Rate prescaler value which will be used to configure the transmit and receive SCK clock SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //data transfers start from MSB or LSB bit SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI2, &SPI_InitStructure); /* Enable SPI2 */ SPI_Cmd(SPI2, ENABLE);

6 3 WebServer.c #include <string.h> #include "enc28j60.h" #include "ip_arp_udp_tcp.h" #include "net.h" #include "WebServer.h" #include "stdio.h" const unsigned char mymac[6] = 0x54,0x55,0x58,0x10,0x00,0x24; const unsigned char myip[4] = 192,168,2,25; static unsigned int mywwwport =80; int WebServer(void) /*initialize enc28j60*/ printf("initialize enc28j60... \r\n"); enc28j60init((unsigned char *)mymac); printf("execute function init_ip_arp_udp_tcp \r\n"); init_ip_arp_udp_tcp((unsigned char *)mymac,(unsigned char *)myip,mywwwport);

7 4 ENC28J60.C #include "enc28j60.h" #include "spi.h" #include <stdio.h> void enc28j60init(unsigned char* macaddr) // initialize I/O ENC28J60_CSH(); enc28j60writeop(enc28j60_soft_reset, 0, ENC28J60_SOFT_RESET); 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 // ff ff ff ff ff ff -> ip checksum for theses bytes=f7f9 // in binary these poitions are: // This is hex 303F->EPMM0=0x3f,EPMM1=0x30 enc28j60write(erxfcon, ERXFCON_UCEN ERXFCON_CRCEN ERXFCON_PMEN); enc28j60write(epmm0, 0x3f);

8 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 MACON3_FULDPX); // 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[0]); enc28j60write(maadr4, macaddr[1]); enc28j60write(maadr3, macaddr[2]); enc28j60write(maadr2, macaddr[3]); enc28j60write(maadr1, macaddr[4]); enc28j60write(maadr0, macaddr[5]); printf("maadr5 = 0x%x\r\n", enc28j60read(maadr5)); printf("maadr4 = 0x%x\r\n", enc28j60read(maadr4)); printf("maadr3 = 0x%x\r\n", enc28j60read(maadr3)); printf("maadr2 = 0x%x\r\n", enc28j60read(maadr2)); printf("maadr1 = 0x%x\r\n", enc28j60read(maadr1)); printf("maadr0 = 0x%x\r\n", enc28j60read(maadr0));

9 enc28j60phywrite(phcon1, PHCON1_PDPXMD); // 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); void enc28j60writeop(unsigned char op, unsigned char address, unsigned char data) unsigned char dat = 0; ENC28J60_CSL(); // issue write command dat = op (address & ADDR_MASK); SPI1_ReadWrite(dat); // write data dat = data; SPI1_ReadWrite(dat); ENC28J60_CSH(); void enc28j60write(unsigned char address, unsigned char data) // set the bank enc28j60setbank(address); // do the write enc28j60writeop(enc28j60_write_ctrl_reg, address, data); void enc28j60phywrite(unsigned char address, unsigned int data) // set the PHY register address enc28j60write(miregadr, address); // write the PHY data

10 enc28j60write(miwrl, data); enc28j60write(miwrh, data>>8); // wait until the PHY write completes while(enc28j60read(mistat) & MISTAT_BUSY) //Del_10us(1); //_nop_(); void enc28j60setbank(unsigned char address) // set the bank (if needed) if((address & BANK_MASK)!= Enc28j60Bank) // set the bank enc28j60writeop(enc28j60_bit_field_clr, ECON1, (ECON1_BSEL1 ECON1_BSEL0)); enc28j60writeop(enc28j60_bit_field_set, ECON1, (address & BANK_MASK)>>5); Enc28j60Bank = (address & BANK_MASK);

11 5 ir_arp_udp_tcp.c // you must call this function once before you use any of the other functions: void init_ip_arp_udp_tcp(unsigned char *mymac,unsigned char *myip,unsigned char wwwp) unsigned char i=0; wwwport=wwwp; printf("ip address:"); while(i<4) ipaddr[i]=myip[i]; printf("%d.",ipaddr[i]); i++; printf("\n\n"); i=0; while(i<6) macaddr[i]=mymac[i]; i++;

12 三 SIOC 與 ENC28J60 的接線圖 Mapping Table Num SIOC ENC28J60 1 GND(1)- 白 GND(10) 2 VDD1(4)- 黃 VCC 3.3V(9) 3 PB13(22)- 橘 SCK(2) 4 PB14(23)- 紫 SO(4) 5 PB15(24)- 棕 SI(3) 6 PA8(25)- 紅 CS(1)

168.2.25 ] 秀出 2 手動設定本機的 ip address [ 192.

13 四 SIOC 驗證 1 將 build 好的 dfu 檔寫入 SIOC 後, 在 putty 將寫入的 mac address 和 ip address [ ] 秀出 2 手動設定本機的 ip address [ ], 設成 ENC28J60 中的 ip address 同一個網段

14 3 將網路線連接至 ENC28J60 後, 電腦右下會顯示區域連線現在已連線速度 : 10.0 Mbps 4 確認本機的 ip address [ ] 5 使用 ping 指令來確認 ENC28J60(ip : ) 是否有回有應, 結果有回應, 測試成功

15 作業最晚於 5 月 26 日前繳交電子檔, 含 Word 檔和 project file, 寄至 : [email protected] mail 主旨請寫 " 嵌入式系統設計期中作業 "

乙太網路 : 簡介 : 乙太網路 (Ethernet) 是一種電腦區域網路組網技術 IEEE 制定的 IEEE 標準給出了乙太網路的技術標準它規定了包括物理層的連線電訊號和介質存取層協定的內容乙太網路是當前應用最普遍的區域網路技術它很大程度上取代了其他區域網路標準, 如令牌環網

嵌入式軟體期中報告 (ENC28J60 乙太網路驅動 base on cortex-m3) 指導老師 : 陳慶瀚教授學號 :995201100 姓名 : 余坤昇乙太網路 : 簡介 : 乙太網路 (Ethernet) 是一種電腦區域網路組網技術 IEEE 制定的 IEEE 802.3 標準給出了乙太網路的技術標準它規定了包括物理層的連線電訊號和介質存取層協定的內容乙太網路是當前應用最普遍的區域網路技術