DSP

CCS+C6678LE开发记录08:以太网接口测试示例之代码研究

2019-07-13 15:05发布

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本文是针对《CCS+C6678LE开发记录06:以太网接口测试》的后续研究。 在已经通过测试之后我想研究一下测试用例的实现原理，至少应该明白大致原理。 为了方便贴代码，我将原始实例的代码做了精简； 为了探索其原理，我修改/添加了少量代码。 主要代码如下 #include #include #include #include #include #include #include "ti/platform/platform.h" #include "ti/platform/resource_mgr.h" static int counter=0; static HANDLE hHello=0; char *HostName = "TMS320C6678"; char *LocalIPAddr = "169.254.11.119"; // My PC Local IP char *LocalIPMask = "255.255.255.0"; // Not used when using DHCP char *GatewayIP = "192.168.2.101"; // Not used when using DHCP char *DomainName = "demo.net"; // Not used when using DHCP char *DNSServer = "0.0.0.0"; // Used when set to anything but zero Uint8 clientMACAddress[6] = {0x01, 0x02, 0x03, 0x04, 0x0C, 0xEF}; /* MAC Addr */ static void NetworkOpen(); static void NetworkClose(); static void NetworkIPAddr(IPN IPAddr, uint IfIdx, uint fAdd); extern int dtask_udp_hello(); void EVM_init() { printf(" EVM_Init() "); platform_init_flags sFlags; platform_init_config sConfig; memset( (void *) &sFlags, 0, sizeof(platform_init_flags)); memset( (void *) &sConfig, 0, sizeof(platform_init_config)); sFlags.pll = 0; /* PLLs for clocking */ sFlags.ddr = 0; /* External memory */ sFlags.tcsl = 1; /* Time stamp counter */ sFlags.phy = 1; /* Ethernet */ sFlags.ecc = 0; /* Memory ECC */ sConfig.pllm = 0; /* Use libraries default clock divisor */ platform_init(&sFlags, &sConfig); } Void Hello(UArg arg0, UArg arg1) { while(1) { printf("Hello "); Task_sleep(2000); if(counter>=3) break; } } Void Test(UArg arg0,UArg arg1); int main() { Task_Handle task1 = Task_create(Test, NULL, NULL); Task_Handle task2 = Task_create(Hello, NULL, NULL); if (task1==NULL || task2==NULL) { printf("Task_create() failed! "); BIOS_exit(0); } BIOS_start(); } Void Test(UArg arg0,UArg arg1) { QMSS_CFG_T qmss_cfg; CPPI_CFG_T cppi_cfg; uint32_t coreID = platform_get_coreid(); uint32_t master=(coreID==0)?1:0; qmss_cfg.master_core = master; qmss_cfg.max_num_desc = MAX_NUM_DESC; qmss_cfg.desc_size = MAX_DESC_SIZE; qmss_cfg.mem_region = Qmss_MemRegion_MEMORY_REGION0; cppi_cfg.master_core = master; cppi_cfg.dma_num = Cppi_CpDma_PASS_CPDMA; cppi_cfg.num_tx_queues = NUM_PA_TX_QUEUES; cppi_cfg.num_rx_channels = NUM_PA_RX_CHANNELS; res_mgr_init_qmss(&qmss_cfg); res_mgr_init_cppi(&cppi_cfg); res_mgr_init_pass(); int rc = NC_SystemOpen( NC_PRIORITY_LOW, NC_OPMODE_INTERRUPT ); if( rc!=0 ) { NC_SystemClose(); return; } HANDLE hCfg = CfgNew(); if( !hCfg ) { NC_SystemClose(); return; } CfgAddEntry( hCfg,CFGTAG_SYSINFO,CFGITEM_DHCP_HOSTNAME,0,strlen(HostName),(UINT8*)HostName,0); CI_IPNET NA; bzero( &NA, sizeof(NA) ); NA.IPAddr = inet_addr(LocalIPAddr); NA.IPMask = inet_addr(LocalIPMask); strcpy( NA.Domain, DomainName ); NA.NetType = 0; CfgAddEntry( hCfg, CFGTAG_IPNET, 1, 0,sizeof(CI_IPNET), (UINT8 *)&NA, 0 ); CI_ROUTE RT; bzero( &RT, sizeof(RT) ); RT.IPDestAddr = 0; RT.IPDestMask = 0; RT.IPGateAddr = inet_addr(GatewayIP); CfgAddEntry( hCfg, CFGTAG_ROUTE, 0, 0,sizeof(CI_ROUTE), (UINT8 *)&RT, 0 ); IPN IPTmp = inet_addr(DNSServer); if( IPTmp ) { CfgAddEntry( hCfg, CFGTAG_SYSINFO, CFGITEM_DHCP_DOMAINNAMESERVER,0, sizeof(IPTmp), (UINT8 *)&IPTmp, 0 ); } rc = DBG_WARN; CfgAddEntry(hCfg,CFGTAG_OS,CFGITEM_OS_DBGPRINTLEVEL,CFG_ADDMODE_UNIQUE, sizeof(uint),(UINT8 *)&rc,0); rc = 8192; CfgAddEntry(hCfg,CFGTAG_IP,CFGITEM_IP_SOCKUDPRXLIMIT,CFG_ADDMODE_UNIQUE,sizeof(uint),(UINT8 *)&rc,0); do { rc = NC_NetStart( hCfg, NetworkOpen, NetworkClose, NetworkIPAddr ); } while( rc > 0 ); CfgFree( hCfg ); NC_SystemClose(); } static void NetworkOpen() { hHello = DaemonNew( SOCK_DGRAM,0,7,dtask_udp_hello,OS_TASKPRINORM,OS_TASKSTKNORM,0,1); } static void NetworkClose() { DaemonFree( hHello ); } static void NetworkIPAddr( IPN IPAddr, uint IfIdx, uint fAdd ) { IPN IPTmp; if( fAdd ) printf("Network Added: "); else printf("Network Removed: "); IPTmp = ntohl( IPAddr ); printf("If-%d:%d.%d.%d.%d ", IfIdx, (UINT8)(IPTmp>>24)&0xFF,(UINT8)(IPTmp>>16)&0xFF, (UINT8)(IPTmp>>8)&0xFF, (UINT8)IPTmp&0xFF ); } int dtask_udp_hello( SOCKET s, UINT32 unused ) { printf("TASK execution %d ",++counter); (void)unused; struct timeval tv; tv.tv_sec = 3; tv.tv_usec = 0; setsockopt(s,SOL_SOCKET,SO_SNDTIMEO,&tv,sizeof(tv)); setsockopt(s,SOL_SOCKET,SO_RCVTIMEO,&tv,sizeof(tv)); struct sockaddr_in sin1; int sz=sizeof(sin1); int recvSize; HANDLE hBuffer; unsigned char* pBuf; while(1) { recvSize=recvncfrom( s, (void**)&pBuf, 0, (PSA)&sin1, &sz, &hBuffer ); if(recvSize<=0) break; sendto( s, pBuf, recvSize, 0, (PSA)&sin1, sz ); recvncfree( hBuffer ); } // Since the socket is still open, return "1" // (we need to leave UDP sockets open) return 1; }
其中EVM_init()函数被设置为在main()函数之前执行，具体设置在一个*.cfg文件中， 部分内容如下 var Memory = xdc.useModule('xdc.runtime.Memory'); var BIOS = xdc.useModule('ti.sysbios.BIOS'); var Task = xdc.useModule('ti.sysbios.knl.Task'); var HeapBuf = xdc.useModule('ti.sysbios.heaps.HeapBuf'); var Log = xdc.useModule('xdc.runtime.Log'); //...省略... Program.sectMap["sharedL2"] = "DDR3"; Program.sectMap["systemHeap"] = "DDR3"; Program.sectMap[".sysmem"] = "DDR3"; Program.sectMap[".args"] = "DDR3"; Program.sectMap[".cio"] = "DDR3"; Program.sectMap[".far"] = "DDR3"; Program.sectMap[".rodata"] = "DDR3"; Program.sectMap[".neardata"] = "DDR3"; //...省略... Startup.lastFxns.$add('&EVM_init'); BIOS.taskEnabled = true; Ecm.eventGroupHwiNum[0] = 7; Ecm.eventGroupHwiNum[1] = 8; Ecm.eventGroupHwiNum[2] = 9; Ecm.eventGroupHwiNum[3] = 10; Global.IPv6 = true;
注意其中的 Startup.lastFxns.$add('&EVM_init');
在主函数中执行BIOS_start()会完成一些主动操作 （似乎是因为main函数在DSP中的地位和在PC上不一样） 总之，在执行完EVM_init()完成基本的初始化后，创建我们的主要任务： Task_Handle task1 = Task_create(Test, NULL, NULL);
Task_Handle task2 = Task_create(Hello, NULL, NULL);
其中Hello任务只是为了演示一下，每隔2秒(sleep(2000))打印一个“Hello”字样 而Test任务则执行了QMSS、CPPI、PA等等的初始化，完成了基本网络配置 启动Network服务后，关联了dtask_udp_hello任务，等待以太网接口的连接 另一边使用PC执行测试，发送字符串进行交互。
因为我们的程序中设置了一个计数器counter 每次发送一个字符串，dtask_udp_hello()就执行一次,counter++ 在Hello任务中，一旦发现条件counter>=3满足了就会退出while()循环，它的使命也就终结了 （注意并不是真的终结，因为没有执行KillTask这样的命令，只是Hello任务不再执行任何操作罢了） 这样只剩下Test任务独自运行了
某次测试如下

本文原创，博文地址 http://blog.csdn.net/fengyhack/article/details/43304505

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