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器件型号：RM57L843 您好！
客户正在尝试修改 TCP/IP 客户端的 HDK lwip 示例代码。
基本代码由以下 git 提供(请参阅原始 E2E 帖子)。
http://git.ti.com/hercules_examples/hercules_examples/trees/master/Application/LwIP
客户修改了以下代码：
Hercules _examples-master\Application\LwIP\v00.04.00\examples\HDK\src\lwip_main.c
修改后的代码如下所示。
err_t connected(void *arg, struct tcp_pcb *newpcb, err_t err) // err is always ERR_OK。
{
err = tcp_write(newpcb, "ABCDE", 5, 0);
if (err != ERR_OK)
{
return err;
}
err = tcp_output(newpcb);
if (err != ERR_OK)
{
return err;
}
return ERR_OK;
}
void EMAC_LwIP_Main (uint8_t * macAddress) {
unsigned int ipAddr;
/// uint8_t testChar;
/// struct in_addr devIPAddress;
/// err_t udp_error;
err_t tcp_error;
u16_t send_bufs;
//u8_t senddat[]={ 1, 2, 3, 4};//"ABCDE";
//s struct pbuf send_p;
//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] = { 44, 2, 168, 192 };
/// uint8 netmask[4] = { 0, 255, 255, 255 };
/// uint8 gateway[4] = { 254, 2, 168, 192 };
/* IP4_ADDR(&ipaddr, 192, 168, 2, 44);
IP4_ADDR(&netmask, 255, 255, 255, 0);
IP4_ADDR(&gateway, 192, 168, 2, 254);
LWIP_PLATFORM_BYTE_SWAP
LWIP_PLATFORM_HTONS()
LWIP_PLATFORM_HTONL()*/
IP4_ADDR(&ipaddr, 44, 2, 168, 192); // my node ip addr
IP4_ADDR(&netmask, 0, 255, 255, 255);
IP4_ADDR(&gateway, 254, 2, 168, 192);
ipAddr = lwIPInit(0, macAddress,
/// *((uint32_t *)ip_addr),
/// *((uint32_t *)netmask),
/// *((uint32_t *)gateway),
ipaddr.addr,
netmask.addr,
gateway.addr,
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 {
#if 0 ///削除
/* 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);
}
#endif
IP4_ADDR(&server, 1, 2, 168, 192); // server ip addr
pcbRcv = tcp_new();
if (!pcbRcv) {
exit(1);
}
//#if 0 //for client
// tcp_bind(pcbRcv, IP_ADDR_ANY, rsv_port);
// tcp_arg(pcbRcv, NULL);
tcp_error = tcp_connect(pcbRcv, &server, rsv_port, connected); //connect to the server
if (tcp_error != ERR_OK)
{
exit(1);
}
send_bufs = tcp_sndbuf(pcbRcv);
// tcp_error = tcp_write(pcbRcv, "ABCDE", 5, 0);
// tcp_error = tcp_write(pcbRcv, senddat, 2, TCP_WRITE_FLAG_COPY);
/* tcp_error = tcp_write(pcbRcv, send_p.payload, 2, TCP_WRITE_FLAG_COPY);
if (tcp_error != ERR_OK)
{
exit(1);
}
tcp_error = tcp_output(pcbRcv);
if (tcp_error != ERR_OK)
{
exit(1);
}
*/
//#endif
#if 0 //for server
tcp_bind(pcbRcv, IP_ADDR_ANY, rsv_port);
/* we do not need any arguments to callback functions */
// tcp_arg(pcbRcv, NULL);
/* listen for connections */
// pcbRcv = tcp_listen(pcbRcv);
pcbRcv = tcp_listen_with_backlog(pcbRcv, 2);
if (!pcbRcv) {
// xil_printf("Out of memory while tcp_listen\n\r");
// return -3;
}
/* specify callback to use for incoming connections */
tcp_accept(pcbRcv, accept_callback);
#endif //for server
while(1){}
}
}
客户尝试将设备连接到 PC (服务器)、但无法连接。
代码位于 EMAC_LwIP_Main()末尾的 while (1)循环中。
tcp_connect()返回 ERR_OK。
还有事吗？
示例代码似乎是 http。 是否需要对 TCP/IP 等进行初始化？
顺便说一下、如果将上述代码配置为 TCP/IP 服务器、则其工作正常(注释掉"#if 0 // for server")。
谢谢、此致、
田志郎一郎
