可以socket printf格式

Question

我在显示我的 CAN ID 时遇到问题。我正在通过 ID 为 0x18FF11F3 的 CAN 总线发送消息。我的程序收到此消息以及所有数据字段，只是 ID 不完全匹配

    void set_can_listener(uint16 *s16_Socket, struct can_frame *Frame) {
    /* Create the socket */
    *s16_Socket = socket(PF_CAN, SOCK_RAW, CAN_RAW);

    /* Locate the interface you wish to use */
    struct ifreq t_Ifr;
    strcpy(t_Ifr.ifr_name, "can0");
    ioctl(*s16_Socket, SIOCGIFINDEX, &t_Ifr); /* Ifr.ifr_ifindex gets filled with that device's index*/

    /* Select that CAN interface, and bind the socket to it.*/
    struct sockaddr_can t_Addr;
    t_Addr.can_family = AF_CAN;
    t_Addr.can_ifindex = t_Ifr.ifr_ifindex;
    bind(*s16_Socket, (struct sockaddr*) &t_Addr, sizeof(t_Addr));
}


void can_listener(uint16 *s16_Socket, struct can_frame *Frame) {
    /* Read message from CAN */
    unsigned int i;
    uint16 s16_BytesRead = read(*s16_Socket, Frame, sizeof(*Frame));
    if (s16_BytesRead >= 0) {
        printf("\nMessage received!\nID: 0x%X\nDLC: %X\n", Frame->can_id,
                Frame->can_dlc);
    }
}

我的输出看起来像:

Message received! 
ID: 0x98FF11F3 
DLC: 8

Answer 1

您正在使用 CAN_EFF_FLAG 过滤器集读取 ID，定义为

#define CAN_EFF_FLAG 0x80000000U

HERE

代码没问题，收到的消息也没有问题。发送方在套接字上启用了 EFF 过滤器。

THIS链接可以为您解释所有关于SocketCAN