【ZYNQ Ultrascale+ MPSOC FPGA教程】第二十五章 PS端以太网使用...

alinx001 · 发表于 2021-1-18 15:54:42

原创声明：

本原创教程由芯驿电子科技（上海）有限公司（ALINX）创作，版权归本公司所有，如需转载，需授权并注明出处。

适用于板卡型号：

AXU2CGA/AXU2CGB/AXU3EG/AXU4EV-E/AXU4EV-P/AXU5EV-E/AXU5EV-P /AXU9EG/AXU15EG

vivado工程目录为“ps_hello/vivado”

vitis工程目录为“ps_net/vitis”

软件工程师工作内容

以下为软件工程师负责内容。

开发板有两路千兆以太网，通过RGMII接口连接，本实验演示如何使用Vitis自带的LWIP模板进行PS端千兆以太网TCP通信。

LWIP虽然是轻量级协议栈，但如果从来没有使用过，使用起来会有一定的困难，建议先熟悉LWIP的相关知识。

1. Vitis程序开发

1.1 LWIP库修改

由于自带的LWIP库只能识别部分phy芯片，如果开发板所用的phy芯片不在默认支持范围内，要修改库文件。也可以直接使用修改过的库替换原有的库。

1）找到库文件目录“X:\xxx\Vitis\2020.1\data\embeddedsw\ThirdParty\sw_services”

2）找到要修改的文件目录“lwip211_v1_2\src\contrib\ports\xilinx\netif”中文件“xaxiemacif_physpeed.c”和“xemacpsif_physpeed.c”要修改。

3）修改PL端的“xaxiemacif_physpeed.c”文件，添加相关宏定义

4）添加phy速度获取函数

unsignedint get_phy_speed_ksz9031(XAxiEthernet *xaxiemacp, u32 phy_addr){ u16 control; u16 status; u16 partner_capabilities; xil_printf("Start PHY autonegotiation \r\n"); XAxiEthernet_PhyWrite(xaxiemacp,phy_addr, IEEE_PAGE_ADDRESS_REGISTER,2); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_CONTROL_REG_MAC,&control); //control |= IEEE_RGMII_TXRX_CLOCK_DELAYED_MASK; control &=~(0x10); XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_CONTROL_REG_MAC, control); XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER,0); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG,&control); control |= IEEE_ASYMMETRIC_PAUSE_MASK; control |= IEEE_PAUSE_MASK; control |= ADVERTISE_100; control |= ADVERTISE_10; XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, control); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET, &control); control |= ADVERTISE_1000; XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET, control); XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER,0); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG, &control); control |=(7<<12); /* max number of gigabit attempts */ control |=(1<<11); /* enable downshift */ XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG, control); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); control |= IEEE_CTRL_AUTONEGOTIATE_ENABLE; control |= IEEE_STAT_AUTONEGOTIATE_RESTART; XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_CONTROL_REG_OFFSET, control); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); control |= IEEE_CTRL_RESET_MASK; XAxiEthernet_PhyWrite(xaxiemacp, phy_addr, IEEE_CONTROL_REG_OFFSET, control); while(1){ XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); if(control & IEEE_CTRL_RESET_MASK) continue; else break; } xil_printf("Waiting for PHY to complete autonegotiation.\r\n"); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_STATUS_REG_OFFSET,&status); while(!(status & IEEE_STAT_AUTONEGOTIATE_COMPLETE)){ sleep(1); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, IEEE_STATUS_REG_OFFSET, &status); } xil_printf("autonegotiation complete \r\n"); XAxiEthernet_PhyRead(xaxiemacp, phy_addr,0x1f,&partner_capabilities); if((partner_capabilities &0x40)==0x40)/* 1000Mbps */ return1000; elseif((partner_capabilities &0x20)==0x20)/* 100Mbps */ return100; elseif((partner_capabilities &0x10)==0x10)/* 10Mbps */ return10; else return0;}

5）修改函数“get_IEEE_phy_speed”，添加对KSZ9031的支持。

unsigned get_IEEE_phy_speed(XAxiEthernet *xaxiemacp){ u16 phy_identifier; u16 phy_model; u8 phytype;#ifdef XPAR_AXIETHERNET_0_BASEADDR u32 phy_addr = detect_phy(xaxiemacp); /* Get the PHY Identifier and Model number */ XAxiEthernet_PhyRead(xaxiemacp, phy_addr, PHY_IDENTIFIER_1_REG,&phy_identifier); XAxiEthernet_PhyRead(xaxiemacp, phy_addr, PHY_IDENTIFIER_2_REG,&phy_model);/* Depending upon what manufacturer PHY is connected, a different mask is * needed to determine the specific model number of the PHY. */ if(phy_identifier == MARVEL_PHY_IDENTIFIER){ phy_model = phy_model & MARVEL_PHY_MODEL_NUM_MASK; if(phy_model == MARVEL_PHY_88E1116R_MODEL){ return get_phy_speed_88E1116R(xaxiemacp, phy_addr); }elseif(phy_model == MARVEL_PHY_88E1111_MODEL){ return get_phy_speed_88E1111(xaxiemacp, phy_addr); } }elseif(phy_identifier == TI_PHY_IDENTIFIER){ phy_model = phy_model & TI_PHY_DP83867_MODEL; phytype = XAxiEthernet_GetPhysicalInterface(xaxiemacp); if(phy_model == TI_PHY_DP83867_MODEL && phytype == XAE_PHY_TYPE_SGMII){ return get_phy_speed_TI_DP83867_SGMII(xaxiemacp, phy_addr); } if(phy_model == TI_PHY_DP83867_MODEL){ return get_phy_speed_TI_DP83867(xaxiemacp, phy_addr); } } elseif(phy_identifier == MICREL_PHY_IDENTIFIER) { xil_printf("Phy %d is KSZ9031\n\r", phy_addr); get_phy_speed_ksz9031(xaxiemacp, phy_addr); } else{ LWIP_DEBUGF(NETIF_DEBUG,("XAxiEthernet get_IEEE_phy_speed: Detected PHY with unknown identifier/model.\r\n")); }#endif#ifdef PCM_PMA_CORE_PRESENT return get_phy_negotiated_speed(xaxiemacp, phy_addr);#endif}

6）修改PS端“xemacpsif_physpeed.c”文件添加宏定义

7）添加phy速度获取函数

static u32_t get_phy_speed_ksz9031(XEmacPs *xemacpsp, u32_t phy_addr){ u16_t temp; u16_t control; u16_t status; u16_t status_speed; u32_t timeout_counter =0; u32_t temp_speed; u32_t phyregtemp; xil_printf("Start PHY autonegotiation \r\n"); XEmacPs_PhyWrite(xemacpsp,phy_addr, IEEE_PAGE_ADDRESS_REGISTER,2); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC,&control); control |= IEEE_RGMII_TXRX_CLOCK_DELAYED_MASK; XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_CONTROL_REG_MAC, control); XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER,0); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG,&control); control |= IEEE_ASYMMETRIC_PAUSE_MASK; control |= IEEE_PAUSE_MASK; control |= ADVERTISE_100; control |= ADVERTISE_10; XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_AUTONEGO_ADVERTISE_REG, control); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET, &control); control |= ADVERTISE_1000; XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_1000_ADVERTISE_REG_OFFSET, control); XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_PAGE_ADDRESS_REGISTER,0); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG, &control); control |=(7<<12); /* max number of gigabit attempts */ control |=(1<<11); /* enable downshift */ XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_CONTROL_REG, control); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); control |= IEEE_CTRL_AUTONEGOTIATE_ENABLE; control |= IEEE_STAT_AUTONEGOTIATE_RESTART; XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, control); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); control |= IEEE_CTRL_RESET_MASK; XEmacPs_PhyWrite(xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET, control); while(1){ XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_CONTROL_REG_OFFSET,&control); if(control & IEEE_CTRL_RESET_MASK) continue; else break; } XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET,&status); xil_printf("Waiting for PHY to complete autonegotiation.\r\n"); while(!(status & IEEE_STAT_AUTONEGOTIATE_COMPLETE)){ sleep(1); XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_COPPER_SPECIFIC_STATUS_REG_2,&temp); timeout_counter++; if(timeout_counter ==30){ xil_printf("Auto negotiation error \r\n"); return; } XEmacPs_PhyRead(xemacpsp, phy_addr, IEEE_STATUS_REG_OFFSET,&status); } xil_printf("autonegotiation complete \r\n"); XEmacPs_PhyRead(xemacpsp, phy_addr,0x1f, &status_speed); if((status_speed &0x40)==0x40)/* 1000Mbps */ return1000; elseif((status_speed &0x20)==0x20)/* 100Mbps */ return100; elseif((status_speed &0x10)==0x10)/* 10Mbps */ return10; else return0; return XST_SUCCESS;}

8）修改函数“get_IEEE_phy_speed”，添加对KSZ9031的支持

static u32_t get_IEEE_phy_speed(XEmacPs *xemacpsp, u32_t phy_addr){ u16_t phy_identity; u32_t RetStatus; XEmacPs_PhyRead(xemacpsp, phy_addr, PHY_IDENTIFIER_1_REG, &phy_identity); if(phy_identity == MICREL_PHY_IDENTIFIER){ RetStatus = get_phy_speed_ksz9031(xemacpsp, phy_addr); }elseif(phy_identity == PHY_TI_IDENTIFIER){ RetStatus = get_TI_phy_speed(xemacpsp, phy_addr); }elseif(phy_identity == PHY_REALTEK_IDENTIFIER){ RetStatus = get_Realtek_phy_speed(xemacpsp, phy_addr); }else{ RetStatus = get_Marvell_phy_speed(xemacpsp, phy_addr); } return RetStatus;}

1.2 创建APP工程时基于LWIP模板

2.下载调试

测试环境要求有一台支持dhcp的路由器，开发板连接路由器可以自动获取IP地址，实验主机和开发板在一个网络，可以相互通信。

2.1 以太网测试

1）连接串口打开串口调试终端，连接好PS端以太网网线到路由器，运行Vitis下载程序

2）可以看到串口打印出一些信息，可以看到自动获取到地址为“192.168.1.63”，连接速度1000Mbps，tcp端口为7

3）使用telnet连接

4）当输入一个字符时，开发板返回相同字符

3. 实验总结

通过实验我们更加深刻了解到Vitis程序的开发，本实验只是简单的讲解如何创建一个LWIP应用，LWIP可以完成UDP、TCP等协议，在后续的教程中我们会提供基于以太网的具体应用，例如ADC采集数据通过以太网发送，摄像头数据通过以太网发送上位机显示。

【ZYNQ Ultrascale+ MPSOC FPGA教程】第二十五章 PS端以太网使用...

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