[讨论] 跪求SAM 9x25 can总线的一些问题的指教

liu20130172 2013-11-21 10:50 楼主

如题目说的，该型号有2路can总线，我按照配套例程，只想使用can1，不想使用can0 ，因为使用can0 后，debug串口不能使用，也就无法使用板子的文件系统和终端。代码以给出截图，我只是将can0 改为can1 。但是显示出类似没有can1这个设备的问题提示，打开can1 失败。求指教。

nt main(char *argv[], int argc)
{
int s,res;
pthread_t id;
unsigned long nbytes;
struct sockaddr_can addr;
struct ifreq ifr;
struct can_frame frame;
char senddata[80] = { "test" };
int len;
int index;
s = socket(PF_CAN,SOCK_RAW,CAN_RAW); // Create a socket with PF_CAN family, SOCK_RAW and CAN_RAW protocol
strcpy((char *)(ifr.ifr_name),"can0"); // Use can0
res = ioctl(s,SIOCGIFINDEX,&ifr); // Control device and get information
printf("ioctl:%d\n", res);
printf("can0 can_ifindex = %x\n",ifr.ifr_ifindex);
int loopback = 0; /* 0 = disabled, 1 = enabled (default) */
setsockopt(s, SOL_CAN_RAW, CAN_RAW_LOOPBACK, &loopback, sizeof(loopback)); // Setting lookback options
printf("set can0 sock loopback unable:%d\n", res);
int recv_own_msgs = 0; /* 0 = disabled (default), 1 = enabled */
res = setsockopt(s, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS, // Setting receiver own massages options
&recv_own_msgs, sizeof(recv_own_msgs));
printf("set can0 do not receiver own massage:%d\n", res);
addr.can_family = AF_CAN; // Use AF_CAN protocol family
addr.can_ifindex = ifr.ifr_ifindex; // frame index
res = bind(s,(struct sockaddr*)&addr,sizeof(addr)); // Binding sock
printf("bind can0 sock:%d\n", res);
/* Create a tread for can1 receiver and send message */
// pthread_create(&id, NULL, (void*)can1_thread, NULL);
frame.can_id = 0x123;
len = strlen(senddata) - 1;
while (1) {
// memset(senddata, 0, sizeof(senddata));
/* Get input from stdin */
// fgets(senddata, sizeof(senddata), stdin);
/* nbytes = recvfrom(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr *)&addr, 16);
if (nbytes != -1) {
printf("Recv message: %d %s\n", nbytes, frame.data);
strncpy(frame.data, senddata, 5);
frame.can_dlc = strlen(frame.data);
nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr *)&addr, sizeof(addr));
if (nbytes != -1) {
printf("Send success:%d %s\n", nbytes, senddata);
}
}
*/
strncpy(frame.data, senddata, 5);
frame.can_dlc = strlen(frame.data);
nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr*)&addr, sizeof(addr));
if (nbytes != -1) {
printf("Send success: %d %s\n", nbytes, senddata);
usleep(500000);
nbytes = recvfrom(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr *)&addr, &len);
if (nbytes != -1) {
printf("Recv message: %d %s\n", nbytes, frame.data);
}
}
/* Send 8 bytes each time */
/*for (index = 0; index < len / 7; ++index) {
memset(frame.data, 0, 8);
strncpy(frame.data, &senddata[index * 7], 7);
frame.can_dlc = strlen(frame.data); // Set data length
nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr*)&addr, sizeof(addr));
if (nbytes == -1) {
perror("send error");
} else {
printf("send %d bytes to can0: %s\n", frame.can_dlc, frame.data);
/* receiver feedback message */
/* nbytes = recvfrom(s,&frame,sizeof(struct can_frame),0,(struct sockaddr *)&addr,&len);
if (nbytes == -1) {
perror("recv error");
} else {
printf("recv %d bytes from can0: %s\n", frame.can_dlc, frame.data);
}
}
}
if (len % 7 != 0) {
memset(frame.data, 0, 8);
strncpy(frame.data, &senddata[index * 7], len % 7);
frame.can_dlc = strlen(frame.data);
nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr*)&addr, sizeof(addr));
if (nbytes == -1) {
perror("send error");
} else {
printf("send %d bytes to can0: %s\n", nbytes, frame.data);
/* receiver feedback message */
/* nbytes = recvfrom(s,&frame,sizeof(struct can_frame),0,(struct sockaddr *)&addr,&len);
if (nbytes == -1) {
perror("recv error");
} else {
printf("recv %d bytes from can0: %s\n", frame.can_dlc, frame.data);
}
}
}*/
}
return 0;
}