can測試-refer to ok6410自帶例子
//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 #endifint 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的接口序號到ifr.ifr_ifindex，必須先去取得can0的index，因為bind時用的是addr的index，而不是名字can0strcpy(ifr.ifr_name,"can0");ioctl(s,SIOCGIFINDEX,&ifr);printf("can0 can_ifindex = %x\n",ifr.ifr_ifindex);//bind to all enabled can interfaceaddr.can_family = AF_CAN;//addr.can_ifindex =0;//選擇監聽所有can接口addr.can_ifindex =ifr.ifr_ifindex;//選擇監聽can0,和網絡中監聽某個ip類似 server_address.sin_addr.s_addr = inet_addr("127.0.0.1");bind(s,(struct sockaddr*)&addr,sizeof(addr));struct can_filter rfilter;//過濾rfilter.can_id?? = 0x123;//選擇監聽can_frame中標示符是0x123的can幀，不過濾則監聽所有。和網絡中監聽某個端口有點類似 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 6union{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 #endifint 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的接口序號到ifr.ifr_ifindexstrcpy((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;//選擇監聽can0bind(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; }
源碼見

can5--socketcan之mcp251x.c

測試發送
//應用打印 [root@FORLINX6410]# /mnt/client can0 can_ifindex = 3 Send a CAN frame from interface can0 //驅動打印 [root@FORLINX6410]#? DBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 631): 從應用層收到發送命令DBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 642): 要發送的數據是skbDBG(drivers/net/can/mcp251x.c, mcp251x_hard_start_xmit(), 643): 啟動發送隊列DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 876): 進入發送隊列DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 889): 打印skb里的數據DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[0]=23//canidDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[1]=1//canidDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[2]=0//canidDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[3]=0//canidDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[4]=5//長度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//數據0 hDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[9]=65//數據1 eDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[10]=6c//數據2 lDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[11]=6c//數據3 lDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[12]=6f//數據4 oDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[13]=0//數據5 隨機DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[14]=f//數據6 隨機DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[15]=40//數據7 隨機DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[16]=3//超范圍DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[17]=0DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[18]=28DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 892): priv->tx_skb->data[19]=0DBG(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=0x123DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901):? p=23DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901):? p=1DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901):? p=0DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 901):? p=0DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 904):? frame->can_dlc=5DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[0]=68DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[1]=65DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[2]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[3]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[4]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[5]=0DBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[6]=fDBG(drivers/net/can/mcp251x.c, mcp251x_tx_work_handler(), 907):? frame->data[7]=40DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 455): 打印是否擴展幀DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 464): 是標準幀DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 479): 打印送給spi的數據DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[0]=40//裝載tx緩沖器命令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//TXBnDLCDBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[6]=68//TXBnD0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[7]=65//TXBnD1DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[8]=6c//TXBnD2DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[9]=6c//TXBnD3DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[10]=6f//TXBnD4DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[11]=0//TXBnD5DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[12]=0//TXBnD6DBG(drivers/net/can/mcp251x.c, mcp251x_hw_tx(), 482): buf[13]=0//TXBnD7DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=40DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=24DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=60DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=1DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[4]=23DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[5]=5DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[6]=68DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[7]=65DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[8]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[9]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[10]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[4]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[5]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[6]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[7]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[8]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[9]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[10]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356):? DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中斷產生 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=2//寫寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=30//發送緩沖器0控制寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=8//即1000b，發送緩沖器等待報文發送--用于請求報文發送DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ffDBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 進入中斷下半部DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器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直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=4//中斷標志寄存器的值=0x4=100b,即發送緩沖器0空中斷，即buf0發送完成中斷DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x4DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1056): 是發送完成中斷: DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據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//中斷標志寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4//掩碼DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0//數據，清零中斷標志DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中斷標志寄存器的值=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x0DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中斷產生DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 進入中斷下半部DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中斷標志寄存器的值=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x0測試接收，另外一塊板子執行client，測試板子執行server進行監聽(不執行server也一樣，反正只要can總線有數據到達，驅動會自動接收)
//應用打印 [root@FORLINX6410]# /mnt/server can0 can_ifindex = 3 Received a CAN frame from interface can0 //驅動打印 [root@FORLINX6410]#? DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中斷產生DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 進入中斷下半部DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器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直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=1//中斷標志寄存器值是1，即rx0中有新數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x1DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1079): 是接收到數據中斷: DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1080): receive buffer0有數據DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx_frame(), 494): 打印是否是mcp2515DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx_frame(), 505): 是mcp2515DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=90//讀rx緩沖器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2cDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[4]=23DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[5]=5//長度，以下都未用到DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[6]=68DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[7]=65DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[8]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[9]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[10]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[11]=75DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[12]=78DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[13]=2eDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=24//RXBnSIDH,即0010 0100,<<3=0010 0100 000DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=60//RXBnSIDL,即0110 0000,>>5=011.兩者相加=001 0010 0011=0x123? DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=27//RXBnEID8,標準幀未使用DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[4]=52//RXBnEID0,標準幀未使用DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[5]=5//RXBnDLC，長度DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[6]=68//RXBnDM0,hDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[7]=65//RXBnDM1,eDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[8]=6c//RXBnDM2,lDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[9]=6c//RXBnDM3,lDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[10]=6f//RXBnDM4,oDBG(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): 打印從spi接收到buf里的數據DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 545):? buf_idx=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[1]=24DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[2]=60DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[3]=27DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[4]=52DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[5]=5DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[6]=68DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[7]=65DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[8]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[9]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[10]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[11]=feDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[12]=3dDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 549):? buf[13]=61DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 552): 打印是否是擴展幀DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 570): 是標準幀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=0x123DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599):? p=23DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599):? p=1DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599):? p=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 599):? p=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 603):? frame->can_dlc=5DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[0]=68DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[1]=65DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[2]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[3]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[4]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[5]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[6]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 607):? frame->data[7]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 612): 打印skb里的數據DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[0]=23DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[1]=1DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[2]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[4]=5DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[5]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[6]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[7]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[8]=68DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[9]=65DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[10]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[11]=6cDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[12]=6fDBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[13]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[14]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[15]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[16]=19DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[17]=0DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[18]=18DBG(drivers/net/can/mcp251x.c, mcp251x_hw_rx(), 615): skb->data[19]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中斷標志寄存器的值=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x0DBG(drivers/net/can/mcp251x.c, mcp251x_can_irq(), 984): 有中斷產生DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1031): 進入中斷下半部DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 356): 打印spi直接發送的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[0]=3//讀寄存器命令DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[1]=2c//中斷標志寄存器DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[2]=4DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 359): priv->spi_tx_buf[3]=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 362): 打印spi直接收到的數據DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[0]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[1]=ffDBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[2]=0//中斷標志寄存器的值=0DBG(drivers/net/can/mcp251x.c, mcp251x_spi_trans(), 365): priv->spi_rx_buf[3]=0DBG(drivers/net/can/mcp251x.c, can_irq_work(), 1049): 中斷標志=0x0

轉載于:https://www.cnblogs.com/-song/archive/2012/07/12/3331864.html

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