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原創聲明：

本原創教程由芯驛電子科技（上海）有限公司（ALINX）創作，版權歸本公司所有，如需轉載，需授權并注明出處。

適用于板卡型號：

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

vivado工程目錄為“ps_hello/vivado”

vitis工程目錄為“ps_net/vitis”

軟件工程師工作內容

以下為軟件工程師負責內容。

開發板有兩路千兆以太網，通過RGMII接口連接，本實驗演示如何使用Vitis自帶的LWIP模板進行PS端千兆以太網TCP通信。

LWIP雖然是輕量級協議棧，但如果從來沒有使用過，使用起來會有一定的困難，建議先熟悉LWIP的相關知識。

1. Vitis程序開發

1.1 LWIP庫修改

由于自帶的LWIP庫只能識別部分phy芯片，如果開發板所用的phy芯片不在默認支持范圍內，要修改庫文件。也可以直接使用修改過的庫替換原有的庫。

1）找到庫文件目錄“X:\xxx\Vitis\2020.1\data\embeddedsw\ThirdParty\sw_services”

2）找到要修改的文件目錄“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，添加相關宏定義

4）添加phy速度獲取函數

unsignedintget_phy_speed_ksz9031(XAxiEthernet*xaxiemacp,u32phy_addr){
	u16control;
	u16status;
	u16partner_capabilities;
	xil_printf("StartPHYautonegotiation\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）修改函數“get_IEEE_phy_speed”，添加對KSZ9031的支持。

unsignedget_IEEE_phy_speed(XAxiEthernet*xaxiemacp){
	u16phy_identifier;
	u16phy_model;
	u8phytype;#ifdefXPAR_AXIETHERNET_0_BASEADDR
	u32phy_addr=detect_phy(xaxiemacp);

	/*GetthePHYIdentifierandModelnumber*/
	XAxiEthernet_PhyRead(xaxiemacp,phy_addr,PHY_IDENTIFIER_1_REG,&phy_identifier);
	XAxiEthernet_PhyRead(xaxiemacp,phy_addr,PHY_IDENTIFIER_2_REG,&phy_model);/*DependinguponwhatmanufacturerPHYisconnected,adifferentmaskis*neededtodeterminethespecificmodelnumberofthePHY.*/
	if(phy_identifier==MARVEL_PHY_IDENTIFIER){
		phy_model=phy_model&MARVEL_PHY_MODEL_NUM_MASK;

		if(phy_model==MARVEL_PHY_88E1116R_MODEL){
			returnget_phy_speed_88E1116R(xaxiemacp,phy_addr);
		}elseif(phy_model==MARVEL_PHY_88E1111_MODEL){
			returnget_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){
			returnget_phy_speed_TI_DP83867_SGMII(xaxiemacp,phy_addr);
		}

		if(phy_model==TI_PHY_DP83867_MODEL){
			returnget_phy_speed_TI_DP83867(xaxiemacp,phy_addr);
		}
	}
	elseif(phy_identifier==MICREL_PHY_IDENTIFIER)
	{
		xil_printf("Phy%disKSZ9031\n\r",phy_addr);
		get_phy_speed_ksz9031(xaxiemacp,phy_addr);
	}
	else{
	LWIP_DEBUGF(NETIF_DEBUG,("XAxiEthernetget_IEEE_phy_speed:DetectedPHYwithunknownidentifier/model.\r\n"));
	}#endif#ifdefPCM_PMA_CORE_PRESENT
	returnget_phy_negotiated_speed(xaxiemacp,phy_addr);#endif}

6）修改PS端“xemacpsif_physpeed.c”文件添加宏定義

7）添加phy速度獲取函數

staticu32_tget_phy_speed_ksz9031(XEmacPs*xemacpsp,u32_tphy_addr){
	u16_ttemp;
	u16_tcontrol;
	u16_tstatus;
	u16_tstatus_speed;
	u32_ttimeout_counter=0;
	u32_ttemp_speed;
	u32_tphyregtemp;

	xil_printf("StartPHYautonegotiation\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）修改函數“get_IEEE_phy_speed”，添加對KSZ9031的支持

staticu32_tget_IEEE_phy_speed(XEmacPs*xemacpsp,u32_tphy_addr){
	u16_tphy_identity;
	u32_tRetStatus;

	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);
	}

	returnRetStatus;}

1.2 創建APP工程時基于LWIP模板