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学习在PS端配置以太网。本篇内容主要是vivado与SDK的使用步骤。
ZYNQ初体验千兆以太网的那些事儿(ps端)_zynq千兆网口实验-CSDN博客
vivado:
新建工程 --> 新建block design --> 选择zynq system,配置Ethernet、uart、SD卡。然后生成比特流
注意,这里不能只配置Ethernet,还要配置uart,不然在SDK新建模板的时候会报错。
生成HDL wrapper。然后export到SDK。
SDK:
新建application,选择lwip模板。
右键bsp配置以太网信息,这里没有修改任何信息。
然后main函数里就有了关于以太网配置的代码了。
那么现在来学习一下以太网相关的知识吧,不然代码看不懂。
fpga接口系列_基于zynq的以太网开发(pl到ps)_pl端采集的信息如何通过ps端以太网传输-CSDN博客
Zynq学习_____以太网三部曲(一)理论篇_zynq 以太网-CSDN博客
参考文档:zynq小系统板之嵌入式SDK开发指南
在创建工程选择模板时,右侧的界面已经说明MAC的地址为00:0a:35:00:01:02,静态IP地址为192.168.1.10,端口为port 7。在代码中的部分为:
echo.c代码:
- #include <stdio.h>
- #include <string.h>
-
- #include "lwip/err.h"
- #include "lwip/tcp.h"
- #if defined (__arm__) || defined (__aarch64__)
- #include "xil_printf.h"
- #endif
-
- int transfer_data() {
- return 0;
- }
-
- void print_app_header()
- {
- xil_printf("\n\r\n\r-----lwIP TCP echo server ------\n\r");
- xil_printf("TCP packets sent to port 6001 will be echoed back\n\r");
- }
-
- err_t recv_callback(void *arg, struct tcp_pcb *tpcb,
- struct pbuf *p, err_t err)
- {
- /* do not read the packet if we are not in ESTABLISHED state */
- if (!p) {
- tcp_close(tpcb);
- tcp_recv(tpcb, NULL);
- return ERR_OK;
- }
-
- /* indicate that the packet has been received */
- tcp_recved(tpcb, p->len);
-
- /* echo back the payload */
- /* in this case, we assume that the payload is < TCP_SND_BUF */
- if (tcp_sndbuf(tpcb) > p->len) {
- err = tcp_write(tpcb, p->payload, p->len, 1);
- } else
- xil_printf("no space in tcp_sndbuf\n\r");
-
- /* free the received pbuf */
- pbuf_free(p);
-
- return ERR_OK;
- }
-
- err_t accept_callback(void *arg, struct tcp_pcb *newpcb, err_t err)
- {
- static int connection = 1;
-
- /* set the receive callback for this connection */
- tcp_recv(newpcb, recv_callback);
-
- /* just use an integer number indicating the connection id as the
- callback argument */
- tcp_arg(newpcb, (void*)connection);
-
- /* increment for subsequent accepted connections */
- connection++;
-
- return ERR_OK;
- }
-
-
- int start_application() //用户应用函数
- {
- struct tcp_pcb *pcb;
- err_t err;
- unsigned port = 7; // 端口设置为7
-
- /* create new TCP PCB structure */
- pcb = tcp_new();
- if (!pcb) {
- xil_printf("Error creating PCB. Out of Memory\n\r");
- return -1;
- }
-
- /* bind to specified @port */
- err = tcp_bind(pcb, IP_ADDR_ANY, port);
- if (err != ERR_OK) {
- xil_printf("Unable to bind to port %d: err = %d\n\r", port, err);
- return -2;
- }
-
- /* we do not need any arguments to callback functions */
- tcp_arg(pcb, NULL);
-
- /* listen for connections */
- pcb = tcp_listen(pcb);
- if (!pcb) {
- xil_printf("Out of memory while tcp_listen\n\r");
- return -3;
- }
-
- /* specify callback to use for incoming connections */
- tcp_accept(pcb, accept_callback);
-
- xil_printf("TCP echo server started @ port %d\n\r", port);
-
- return 0;
- }
main.c代码:
- #include <stdio.h>
-
- #include "xparameters.h"
-
- #include "netif/xadapter.h"
-
- #include "platform.h"
- #include "platform_config.h"
- #if defined (__arm__) || defined(__aarch64__)
- #include "xil_printf.h"
- #endif
-
- #include "lwip/tcp.h"
- #include "xil_cache.h"
-
- #if LWIP_DHCP==1
- #include "lwip/dhcp.h"
- #endif
-
- /* defined by each RAW mode application */
- void print_app_header();
- int start_application();
- int transfer_data();
- void tcp_fasttmr(void);
- void tcp_slowtmr(void);
-
- /* missing declaration in lwIP */
- void lwip_init();
-
- #if LWIP_DHCP==1
- extern volatile int dhcp_timoutcntr;
- err_t dhcp_start(struct netif *netif);
- #endif
-
- extern volatile int TcpFastTmrFlag;
- extern volatile int TcpSlowTmrFlag;
- static struct netif server_netif;
- struct netif *echo_netif;
-
- void
- print_ip(char *msg, struct ip_addr *ip)
- {
- print(msg);
- xil_printf("%d.%d.%d.%d\n\r", ip4_addr1(ip), ip4_addr2(ip),
- ip4_addr3(ip), ip4_addr4(ip));
- }
-
- void
- print_ip_settings(struct ip_addr *ip, struct ip_addr *mask, struct ip_addr *gw)
- {
-
- print_ip("Board IP: ", ip);
- print_ip("Netmask : ", mask);
- print_ip("Gateway : ", gw);
- }
-
- #if defined (__arm__) || defined(__aarch64__)
- #if XPAR_GIGE_PCS_PMA_SGMII_CORE_PRESENT == 1 || XPAR_GIGE_PCS_PMA_1000BASEX_CORE_PRESENT == 1
- int ProgramSi5324(void);
- int ProgramSfpPhy(void);
- #endif
- #endif
- int main()
- {
-
- #if __aarch64__
- Xil_DCacheDisable();
- #endif
-
- struct ip_addr ipaddr, netmask, gw;
-
- /* the mac address of the board. this should be unique per board */
- unsigned char mac_ethernet_address[] =
- { 0x00, 0x0a, 0x35, 0x00, 0x01, 0x02 };
-
- echo_netif = &server_netif;
- #if defined (__arm__) || defined(__aarch64__)
- #if XPAR_GIGE_PCS_PMA_SGMII_CORE_PRESENT == 1 || XPAR_GIGE_PCS_PMA_1000BASEX_CORE_PRESENT == 1
- ProgramSi5324();
- ProgramSfpPhy();
- #endif
- #endif
-
- init_platform();
-
- #if LWIP_DHCP==1
- ipaddr.addr = 0;
- gw.addr = 0;
- netmask.addr = 0;
- #else
- /* initliaze IP addresses to be used */
- IP4_ADDR(&ipaddr, 192, 168, 1, 10);
- IP4_ADDR(&netmask, 255, 255, 255, 0);
- IP4_ADDR(&gw, 192, 168, 1, 1);
- #endif
- print_app_header();
-
- lwip_init();
-
- /* Add network interface to the netif_list, and set it as default */
- if (!xemac_add(echo_netif, &ipaddr, &netmask,
- &gw, mac_ethernet_address,
- PLATFORM_EMAC_BASEADDR)) {
- xil_printf("Error adding N/W interface\n\r");
- return -1;
- }
- netif_set_default(echo_netif);
-
- /* now enable interrupts */
- platform_enable_interrupts();
-
- /* specify that the network if is up */
- netif_set_up(echo_netif);
-
- #if (LWIP_DHCP==1)
- /* Create a new DHCP client for this interface.
- * Note: you must call dhcp_fine_tmr() and dhcp_coarse_tmr() at
- * the predefined regular intervals after starting the client.
- */
- dhcp_start(echo_netif);
- dhcp_timoutcntr = 24;
-
- while(((echo_netif->ip_addr.addr) == 0) && (dhcp_timoutcntr > 0))
- xemacif_input(echo_netif);
-
- if (dhcp_timoutcntr <= 0) {
- if ((echo_netif->ip_addr.addr) == 0) {
- xil_printf("DHCP Timeout\r\n");
- xil_printf("Configuring default IP of 192.168.1.10\r\n");
- IP4_ADDR(&(echo_netif->ip_addr), 192, 168, 1, 10);
- IP4_ADDR(&(echo_netif->netmask), 255, 255, 255, 0);
- IP4_ADDR(&(echo_netif->gw), 192, 168, 1, 1);
- }
- }
-
- ipaddr.addr = echo_netif->ip_addr.addr;
- gw.addr = echo_netif->gw.addr;
- netmask.addr = echo_netif->netmask.addr;
- #endif
-
- print_ip_settings(&ipaddr, &netmask, &gw);
-
- /* start the application (web server, rxtest, txtest, etc..) */
- start_application();
-
- /* receive and process packets */
- while (1) {
- if (TcpFastTmrFlag) {
- tcp_fasttmr();
- TcpFastTmrFlag = 0;
- }
- if (TcpSlowTmrFlag) {
- tcp_slowtmr();
- TcpSlowTmrFlag = 0;
- }
- xemacif_input(echo_netif);
- transfer_data();
- }
-
- /* never reached */
- cleanup_platform();
-
- return 0;
- }
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