[参考译文] LAUNCHXL2-570LC43：EMAC 传输和接收问题

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1509898/launchxl2-570lc43-emac-transmission-and-reception-issue

工具/软件：

我有两个 TMS570LC4357 Launchpad、我想执行这两个 TMS570LC4357 Launchpad 之间的 EMAC 通信。 我使用了与 EMAC_Loopback 示例相同的 HalCOGen 配置、但我已禁用环回并更改了两个 LaunchPad 的 MAC 地址。 问题是、当我从一个 LaunchPad 发送并监测 TXGOODFRAMES 寄存器时、我得到0000000、我认为这不是预期结果。 问题出在哪里？  下面是变速箱的代码。

#include "HL_sys_common.h"
#include "HL_system.h"
#include "HL_emac.h"
#include "HL_hw_reg_access.h"

// Global flag to track transmission status
volatile uint8 txSuccessFlag = 0;


uint8 src_emacAddress[6U] = {0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU};  // TX MAC
uint8 dest_emacAddress[6U] = {0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU}; // RX MAC
extern hdkif_t hdkif_data[1];

pbuf_t pack[1];
uint8 data[1][100];
uint8 a = 0;
uint8 b = 0;
uint8 c = 0;

void create_packet()
{
    int j;

    pack[0].tot_len = 64;  // Make sure it's >= minimum Ethernet frame size
    pack[0].len = 64;

    // Destination MAC
    for (j = 0; j < 6; j++)
        data[0][j] = dest_emacAddress[j];

    // Source MAC
    for (j = 0; j < 6; j++)
        data[0][j + 6] = src_emacAddress[j];

    // EtherType
    data[0][12] = 0x88;
    data[0][13] = 0xB5;

    // Payload "hello"
    data[0][14] = 'h';
    data[0][15] = 'e';
    data[0][16] = 'l';
    data[0][17] = 'l';
    data[0][18] = 'o';

    for (j = 19; j < 64; j++)
        data[0][j] = 0x00;

    pack[0].payload = &data[0][0];
    pack[0].next = NULL;
}

// Notification function called when TX is complete
void emacTxNotification(hdkif_t *hdkif)
{
    // Set flag to indicate transmission success
    txSuccessFlag = 1;  // Transmission completed successfully
}

void main(void)
{

    _enable_IRQ();
    EMACHWInit(src_emacAddress);

    create_packet();
    while(1){
        txSuccessFlag=0;
    if (EMACTransmit(&hdkif_data[0], &pack[0]) != 0)
    {
        // Transmission started, now wait for notification
               while (txSuccessFlag == 0);  // Wait for notification (TX success)
               if (txSuccessFlag == 1) {
                   // Transmission was successful
                   a++;  // Some logic to indicate success
               } else {
                   // Transmission failed
                   b = 9;  // Some logic to indicate failure
               }
    }
    else
    {
        c = 9;
    }
    }
}