[TriCore][官方例程][TC397以太网例程详解] - 1.概览

// Cpu0_Main.c
void core0_main (void)
{
    ...
// ---------------------------------------------------
    // STM 初始化
    IfxStm_CompareConfig stmCompareConfig;                                  /* STM Configuration declaration                */
    IfxStm_initCompareConfig(&stmCompareConfig);                            /* Initialize a default configuration for STM   */
    stmCompareConfig.triggerPriority     = ISR_PRIORITY_OS_TICK;            /* Priority of the interrupt generated by STM   */
    stmCompareConfig.comparatorInterrupt = IfxStm_ComparatorInterrupt_ir0;  /* Select the request source 0                  */
    stmCompareConfig.ticks               = IFX_CFG_STM_TICKS_PER_MS * 10;   /* First interrupt shall occur after 10 ms      */
    stmCompareConfig.typeOfService       = IfxSrc_Tos_cpu0;                 /* CPU0 serves the interrupts                   */
    IfxStm_initCompare(&MODULE_STM0, &stmCompareConfig);                    /* Initialize the Compare functionality         */
// ---------------------------------------------------

// ---------------------------------------------------
    // 检查 GETH 模块是否使能，若未使能则发送使能请求
    IfxGeth_enableModule(&MODULE_GETH);                     /* Enable Gigabit Ethernet Media Access Controller (GETH) module*/
        |--> gethSFR->CLC.B.DISR = 0;                       /* set the enable request */
        |--> IfxGeth_isModuleEnabled(gethSFR);              /* read back to ensure proper enabling */
            |--> return (gethSFR->CLC.B.DISS == 0) ? 1 : 0;
// ---------------------------------------------------

// ---------------------------------------------------
    // LwIP 初始化
    /* Define a MAC Address */
    eth_addr_t ethAddr;
    ethAddr.addr[0] = 0xDE;
    ethAddr.addr[1] = 0xAD;
    ethAddr.addr[2] = 0xBE;
    ethAddr.addr[3] = 0xEF;
    ethAddr.addr[4] = 0xFE;
    ethAddr.addr[5] = 0xED;
    Ifx_Lwip_init(ethAddr);                                 /* Initialize LwIP with the MAC address                         */
// ---------------------------------------------------

// ---------------------------------------------------
    // ECHO 应用初始化
    echoInit();                                             /* Initialize ECHO application                                  */
// ---------------------------------------------------

    while (1)
    {
// ---------------------------------------------------
        // 循环监听
        Ifx_Lwip_pollTimerFlags();                          /* Poll LwIP timers and trigger protocols execution if required */
        Ifx_Lwip_pollReceiveFlags();                        /* Receive data package through ETH                             */
// ---------------------------------------------------
    }
}

2.运行例程

官方例程无法直接运行，需要对 IP 地址、子网掩码、默认网关等进行设置

2.1.配置 IP 地址

官方例程的 IP、网关、子网掩码未指定，需要用户配置，在 Ifx_Lwip_init() 初始化时，手动设置这三个地址：

// Libraries/Ethernet/lwip/port/src/Ifx_Lwip.c
void Ifx_Lwip_init(eth_addr_t ethAddr)
{
    ...
    ip_addr_t default_ipaddr, default_netmask, default_gw;
    IP4_ADDR(&default_gw, 0,0,0,0);
    IP4_ADDR(&default_ipaddr, 0,0,0,0);
    IP4_ADDR(&default_netmask, 255,0,0,0);
----------------------------------------------------------
  
// 重新配置
    ip_addr_t default_ipaddr, default_netmask, default_gw;
    IP4_ADDR(&default_gw, 192,168,3,1);
    IP4_ADDR(&default_ipaddr, 192,168,3,123);
    IP4_ADDR(&default_netmask, 255,255,255,0);