[参考译文] TMS570LC4357：TMS570LC4357：我们采用 TMS570LC4357 HDK 开发板中的 RMII 模式电路设计用于以太网接口。 但是、我们无法对计算机主机执行 ping 操作。

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1309219/tms570lc4357-tms570lc4357-we-have-adopted-the-rmii-mode-circuit-design-for-the-ethernet-interface-from-the-tms570lc4357-hdk-development-board-however-we-are-unable-to-ping-the-computer-host

我们使用的是官方软件版本 v00.04.00、HCG 中的配置如下：

1、引脚多路复用

2、输入引脚多路复用

3、特殊引脚多路复用

4 μ A EMAC、

5、VIM 通道64-95

6、VIM RAM

7、GCM

8、PLL

我是否可以问、HCG 的配置是否有任何错误？

我在项目 v00.04.00中的修改如下：

1、对函数 EMAC_LwIP_Main 的修改如下：

void EMAC_LwIP_Main (uint8_t * macAddress)
{
    unsigned int 	ipAddr;
    uint8_t 		testChar;
    struct in_addr 	devIPAddress;

	//iommUnlock();
	//iommMuxEnableMdio();
	//iommMuxEnableMii();
	//iommLock();
//	sciInit();
	
	/* Enable the interrupt generation in CPSR register */
	IntMasterIRQEnable();
	_enable_FIQ();

	sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	sciDisplayText(sciREGx, txtTitle, sizeof(txtTitle));
	sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	sciDisplayText(sciREGx, txtTI, sizeof(txtTI));
	sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#ifdef __little_endian__        
    sciDisplayText(sciREGx, txtLittleEndian, sizeof(txtLittleEndian));
    sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#else        
    sciDisplayText(sciREGx, txtBigEndian, sizeof(txtBigEndian));
    sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#endif

	/* Initialze the lwIP library, using DHCP.*/
	sciDisplayText(sciREGx, txtEnetInit, sizeof(txtEnetInit));
//	ipAddr = lwIPInit(0, macAddress, 0, 0, 0, IPADDR_USE_DHCP);
	/* Uncomment the following if you'd like to assign a static IP address. Change address as required, and uncomment the previous statement. */

	uint8 ip_addr[4] = { 192, 168, 2, 44 };
	uint8 netmask[4] = { 255, 255, 255, 0 };
	uint8 gateway[4] = { 192, 168, 2, 254 };
	ipAddr = lwIPInit(0, macAddress,
			*((uint32_t *)ip_addr),
			*((uint32_t *)netmask),
			*((uint32_t *)gateway),
			IPADDR_USE_STATIC);
	sciDisplayText(sciREGx, (uint8_t*)"..DONE", sizeof("..DONE"));
	sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	
	if (0 == ipAddr) {
		sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
		sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
        sciDisplayText(sciREGx, txtErrorInit, sizeof(txtErrorInit));
        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	} else { 
		/* Convert IP Address to string */
		devIPAddress.s_addr = ipAddr;
		txtIPAddrItoA = (uint8_t *)inet_ntoa(devIPAddress);
		LocatorConfig(macAddress, "HDK enet_lwip");
	
		/* Initialize the sample httpd server. */
		sciDisplayText(sciREGx, (uint8_t*)"Starting Web Server", sizeof("Starting Web Server"));
//	    httpd_init();
	    sciDisplayText(sciREGx, (uint8_t*)"..DONE", sizeof("..DONE"));
	    sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	    
	     /* Loop forever.  All the work is done in interrupt handlers. */
	    while(1)
	    {    	
	        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	        
	        sciDisplayText(sciREGx, txtTitle, sizeof(txtTitle));
	        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
	        
	        sciDisplayText(sciREGx, txtTI, sizeof(txtTI));
	        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#ifdef __little_endian__        
	        sciDisplayText(sciREGx, txtLittleEndian, sizeof(txtLittleEndian));
	        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#else        
	        sciDisplayText(sciREGx, txtBigEndian, sizeof(txtBigEndian));
	        sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
#endif
			sciDisplayText(sciREGx, txtIPAddrTxt, sizeof(txtIPAddrTxt));
	        sciDisplayText(sciREGx, txtIPAddrItoA, 16);
			sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
			
			sciDisplayText(sciREGx, txtNote1, sizeof(txtNote1));
			sciDisplayText(sciREGx, txtIPAddrItoA, 16);
			sciDisplayText(sciREGx, txtCRLF, sizeof(txtCRLF));
			
	        
	        /* Before printing the next set, wait for a character on the terminal */
//	        sciReceive(sciREGx, 1, &testChar);
	    }
	}
}

2、对函数 sciDisplayText 的修改如下：

void sciDisplayText(sciBASE_t *sci, uint8_t *text,uint32_t length)
{
//    while(length--)
//    {
//        while ((sci->FLR & 0x4) == 4); /* wait until busy */
//        sciSendByte(sci,*text++);      /* send out text   */
//    };
}

3、lwiplib.h 中的修改如下：

#define IPADDR_USE_STATIC       1
#define IPADDR_USE_DHCP         0
#define IPADDR_USE_AUTOIP       0

4、 lwipopts.h 中的修改如下：

#define LWIP_DHCP             0

我在计算机主机端的以太网配置如下：

IP：192.168.2.43

网络掩码：255.255.255.0

网关：192.168.2.254

尽管尝试从计算机主机 ping 我们的自定义硬件、但我无法成功建立连接。 我无法确定问题的原因。