can4--测试can
can测试-refer to ok6410自带例子
源码见
//server.c
//server.c
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/can.h>
#ifndef PF_CAN
#define PF_CAN 29
#endif
#ifndef AF_CAN
#define AF_CAN PF_CAN
#endif
int main()
{
int s;
unsigned long nbytes,len;
struct sockaddr_can addr;
struct ifreq ifr;
struct can_frame frame;
s = socket(PF_CAN,SOCK_RAW,CAN_RAW);
//取得can0的接口序号到ifr.ifr_ifindex，必须先去取得can0的index，因为bind时用的是addr的index，而不是名字can0
strcpy(ifr.ifr_name,"can0");
ioctl(s,SIOCGIFINDEX,&ifr);
printf("can0 can_ifindex = %x\n",ifr.ifr_ifindex);
//bind to all enabled can interface
addr.can_family = AF_CAN;
//addr.can_ifindex =0;//选择监听所有can接口
addr.can_ifindex =ifr.ifr_ifindex;//选择监听can0,和网络中监听某个ip类似 server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
bind(s,(struct sockaddr*)&addr,sizeof(addr));
struct can_filter rfilter;//过滤
rfilter.can_id = 0x123;//选择监听can_frame中标示符是0x123的can帧，不过滤则监听所有。和网络中监听某个端口有点类似 server_address.sin_port = 9734;
rfilter.can_mask = CAN_SFF_MASK;
setsockopt(m_can, SOL_CAN_RAW, CAN_RAW_FILTER, &rfilter, sizeof(rfilter));
nbytes = recvfrom(s,&frame,sizeof(struct can_frame),0,(struct sockaddr *)&addr,&len);
/*get interface name of the received CAN frame*/
ifr.ifr_ifindex = addr.can_ifindex;
ioctl(s,SIOCGIFNAME,&ifr);
printf("Received a CAN frame from interface %s\n",ifr.ifr_name);
printf("frame message\n"
"--can_id = %x\n"
"--can_dlc = %x\n"
"--data = %s\n",frame.can_id,frame.can_dlc,frame.data);
return 0;
}
其中，ifreq /*
* Interface request structure used for socket
* ioctl's. All interface ioctl's must have parameter
* definitions which begin with ifr_name. The
* remainder may be interface specific.
*/
struct ifreq {
#define IFHWADDRLEN 6
union
{
char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
char ifru_newname[IFNAMSIZ];
void __user * ifru_data;
struct if_settings ifru_settings;
} ifr_ifru;
};
#define ifr_name ifr_ifrn.ifrn_name /* interface name */
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address */
#define ifr_addr ifr_ifru.ifru_addr /* address */
#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk */
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask */
#define ifr_flags ifr_ifru.ifru_flags /* flags */
#define ifr_metric ifr_ifru.ifru_ivalue /* metric */
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu */
#define ifr_map ifr_ifru.ifru_map /* device map */
#define ifr_slave ifr_ifru.ifru_slave /* slave device */
#define ifr_data ifr_ifru.ifru_data /* for use by interface */
#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index */
#define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth */
#define ifr_qlen ifr_ifru.ifru_ivalue /* Queue length */
#define ifr_newname ifr_ifru.ifru_newname /* New name */
#define ifr_settings ifr_ifru.ifru_settings /* Device/proto settings*///client.c
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/can.h>
#ifndef PF_CAN
#define PF_CAN 29
#endif
#ifndef AF_CAN
#define AF_CAN PF_CAN
#endif
int main()
{
int s;
unsigned long nbytes;
struct sockaddr_can addr;
struct ifreq ifr;
struct can_frame frame;
s = socket(PF_CAN,SOCK_RAW,CAN_RAW);
//取得can0的接口序号到ifr.ifr_ifindex
strcpy((char *)(ifr.ifr_name),"can0");
ioctl(s,SIOCGIFINDEX,&ifr);
printf("can0 can_ifindex = %x\n",ifr.ifr_ifindex);
addr.can_family = AF_CAN;
addr.can_ifindex = ifr.ifr_ifindex;//选择监听can0
bind(s,(struct sockaddr*)&addr,sizeof(addr));
frame.can_id = 0x123;
strcpy((char *)frame.data,"hello");
frame.can_dlc = strlen(frame.data);
printf("Send a CAN frame from interface %s\n",ifr.ifr_name);
nbytes = sendto(s,&frame,sizeof(struct can_frame),0,(struct sockaddr*)&addr,sizeof(addr));
return 0;
}
源码见
can5--socketcan之mcp251x.c
测试发送//应用打印 [root@FORLINX6410]# /mnt/client can0 can_ifindex = 3 Send a CAN frame from interface can0 //驱动打印 [root@FORLINX6410]# DBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 631): 从应用层收到发送命令 DBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 642): 要发送的数据是skb DBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 643): 启动发送队列 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 876): 进入发送队列 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 889): 打印skb里的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[0]=23//canid DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[1]=1//canid DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[2]=0//canid DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[3]=0//canid DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[4]=5//长度 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[5]=4d//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[6]=ba//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[7]=be//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[8]=68//数据0 h DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[9]=65//数据1 e DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[10]=6c//数据2 l DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[11]=6c//数据3 l DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[12]=6f//数据4 o DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[13]=0//数据5 随机 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[14]=f//数据6 随机 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[15]=40//数据7 随机 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[16]=3//超范围 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[17]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[18]=28 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[19]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 896): 打印can_frame的字段 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 897): frame->can_id=0x123 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901): p=23 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901): p=1 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901): p=0 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901): p=0 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 904): frame->can_dlc=5 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[0]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[1]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[2]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[3]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[4]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[5]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[6]=f DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907): frame->data[7]=40 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 455): 打印是否扩展帧 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 464): 是标准帧 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 479): 打印送给spi的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[0]=40//装载tx缓冲器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[1]=24//TXBnSIDH--? DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[2]=60//TXBnSIDL--? DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[3]=1//TXBnEID8--? DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[4]=23//TXBnEID0--? DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[5]=5//TXBnDLC DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[6]=68//TXBnD0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[7]=65//TXBnD1 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[8]=6c//TXBnD2 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[9]=6c//TXBnD3 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[10]=6f//TXBnD4 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[11]=0//TXBnD5 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[12]=0//TXBnD6 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[13]=0//TXBnD7 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=40 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=24 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=60 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=1 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[4]=23 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[5]=5 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[6]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[7]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[8]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[9]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[10]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[4]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[5]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[6]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[7]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[8]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[9]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[10]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中断产生 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=2//写寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=30//发送缓冲器0控制寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=8//即1000b，发送缓冲器等待报文发送--用于请求报文发送 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ff DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 进入中断下半部 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=8//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=1//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=4//中断标志寄存器的值=0x4=100b,即发送缓冲器0空中断，即buf0发送完成中断 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x4 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1056): 是发送完成中断: DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=5//位修改指令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4//掩码 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0//数据，清零中断标志 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中断标志寄存器的值=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x0 DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中断产生 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 进入中断下半部 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中断标志寄存器的值=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x0测试接收，另外一块板子执行client，测试板子执行server进行监听(不执行server也一样，反正只要can总线有数据到达，驱动会自动接收)
//应用打印 [root@FORLINX6410]# /mnt/server can0 can_ifindex = 3 Received a CAN frame from interface can0 //驱动打印 [root@FORLINX6410]# DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中断产生 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 进入中断下半部 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0//未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=1//中断标志寄存器值是1，即rx0中有新数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x1 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1079): 是接收到数据中断: DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1080): receive buffer0有数据 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx_frame(), 494): 打印是否是mcp2515 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx_frame(), 505): 是mcp2515 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=90//读rx缓冲器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[4]=23 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[5]=5//长度，以下都未用到 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[6]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[7]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[8]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[9]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[10]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[11]=75 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[12]=78 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[13]=2e DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=24//RXBnSIDH,即0010 0100,<<3=0010 0100 000 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=60//RXBnSIDL,即0110 0000,>>5=011.两者相加=001 0010 0011=0x123 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=27//RXBnEID8,标准帧未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[4]=52//RXBnEID0,标准帧未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[5]=5//RXBnDLC，长度 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[6]=68//RXBnDM0,h DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[7]=65//RXBnDM1,e DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[8]=6c//RXBnDM2,l DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[9]=6c//RXBnDM3,l DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[10]=6f//RXBnDM4,o DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[11]=fe//RXBnDM5,未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[12]=3d//RXBnDM6,未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[13]=61//RXBnDM7,未使用 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 544): 打印从spi接收到buf里的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 545): buf_idx=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[1]=24 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[2]=60 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[3]=27 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[4]=52 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[5]=5 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[6]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[7]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[8]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[9]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[10]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[11]=fe DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[12]=3d DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549): buf[13]=61 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 552): 打印是否是扩展帧 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 570): 是标准帧 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 594): 打印can_frame的字段 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 595): frame->can_id=0x123 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599): p=23 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599): p=1 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599): p=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599): p=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 603): frame->can_dlc=5 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[0]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[1]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[2]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[3]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[4]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[5]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[6]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607): frame->data[7]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 612): 打印skb里的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[0]=23 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[1]=1 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[2]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[4]=5 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[5]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[6]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[7]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[8]=68 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[9]=65 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[10]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[11]=6c DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[12]=6f DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[13]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[14]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[15]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[16]=19 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[17]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[18]=18 DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[19]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中断标志寄存器的值=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x0 DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中断产生 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 进入中断下半部 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接发送的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//读寄存器命令 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中断标志寄存器 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的数据 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ff DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中断标志寄存器的值=0 DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0 DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中断标志=0x0
