ascan数据微信是什么么意思呢

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The CAN bus is an ISO standard bus originally developed for vehicles. It manages the Chassis Electrical System Control
and is responsible for critical activities like engine electrical, and skid control. This system is also used
to provide vehicle diagnostic information for maintenance. A multi-star configuration seems typical of
this bus with a primary bus line that branches into sub bus lines at its extremities then attaches to
multiple device nodes. Differential voltage is applied over twisted pair at 1.5 to 2.5V and 2.5 to 3.5V
for noise resistant signaling. Bit rates up to 1 Mbit/s are possible at network lengths below 40 m.
Decreasing the bit rate allows longer network distances (e.g., 500 m at 125 kbit/s).
(Jeremiah J. Flerchinger )
Controllers supporting CAN FD, an enhanced CAN version with frames up to 64 byte and bit rates up to 4 Mbit/s,
will be available in the second half of 2014. A can4linux version supportig CAN FD on a
is ready to be used.
Although developed as car communication network CAN is used in many other areas, industrial, medical, maritime laboratory and more.
Most often with a CAN based higher layer protocol like
on top of it.
Additional information can be found at:
CAN user association
CAN is supported by Linux device drivers. Mainly two types exist. Character device based drivers and network socket based drivers. The Linux kernel supports CAN with the SocketCAN framework.
One of the character based drivers is can4linux.
RAW: send & receive raw CAN frames
BCM: Broadcast manager, offload repetitive work to the Linux kernel
Microchip MCP251x
Atmel AT91 SoCs
ESD 331 CAN Cards
NXP (Philips) SJA1000
Freescale MPC52xx SoCs
Bosch CC770
Intel AN82527
Serial/network devices utilizing ASCII protocol (slcan driver)
Device Name
Driver Module Name
Controller
Kconfig Option
Linux Mainline
CONFIG_CAN_SLCAN
needs slcand and socat
CONFIG_CAN_SLCAN
needs slcand
CONFIG_CAN_SLCAN
needs slcand
CONFIG_CAN_SLCAN
needs slcand
CONFIG_CAN_PEAK_PCI
supports all PCAN-[mini]PCI[e][104] variants
CONFIG_CAN_PEAK_USB
supports PCAN-USB[pro][hub] (no LIN support)
kvaser_pci
CONFIG_CAN_KVASER_PCI
supports all PCI-[mini]PCI[e][104] variants
kvaser_usb
CONFIG_CAN_KVASER_USB
supports USB Leaf / Memorator / Blackbird / R (see detailed USB device IDs in kvaser_usb.c)
kvaser_usb
CONFIG_CAN_KVASER_USB
Kvaser USBCan-II HS/LS
Kvaser USBCan-II HS/HS
Kvaser USBcan Rugged ("USBcan Rev B")
Kvaser Memorator HS/LS
Kvaser Memorator HS/HS
Scania VCI2 (if you have the Kvaser logo on top)
ems_pcmcia
CONFIG_CAN_EMS_PCMCIA
discontinued
CONFIG_CAN_EMS_USB
CONFIG_CAN_EMS_PCI
up to four channel
CONFIG_CAN_EMS_PCI
up to four channel on a PC104+ board
(STR750FV2)
CONFIG_CAN_8DEV_USB
softing_cs
sja1000 or NEC-005(?)
CONFIG_CAN_SOFTING_CS
Supports {CAN,EDIC}card{,SJA,2} PCMCIA cards
Needs firmware
with integrated CAN (on the popular
single-board computer.)
Analog Devices BlackFin BF537
Atmel AT91 SoCs
FlexCAN (ColdFire 5282, i.MX25, i.MX28, i.MX35)
Intel 82527 (the replacement Bosch CC770 should work)
Microchip Stand Alone CAN MCP2515
NXP Stand Alone CAN
(on different ISA or PCI/PCIe boards)
Zynq with XCAN
'virtual' CAN mode without CAN hardware
'virtual' CAN mode supporting
FPGA IP, in classic CAN mode and CAN FD mode
C - many examples and useful applications are provided with the package, check can4linux-examples/
also in can4linux-examples/
also in can4linux-examples/
SJA1000 CAN controller based PCI board emulation for QEMU
Cards models provided:
Simple memory mapped SJA1000 in the first PCI BAR with ad-hoc PCI ID
Kvaser PCIcan-S single I/O mapped SJA1000 model compatible with kvaser_pci Linux driver on guest side
Advantech PCM-3680i PCI CAN (dual SJA1000 channel)
The emulated CAN buses can be connected to virtual or physical SocketCAN interface if Linux is used as host system
Project repository:
Work started by 2013 GSoC project when RTEMS project donated its slot to work on QEMU CAN support - see
for more info and use instructions
Some instructions and RTLWS article can be found at工具类服务
编辑部专用服务
作者专用服务
作为市场化的人口流动--第五次全国人口普查数据分析
文章利用2000年第五次全国人口普查等有关资料,分析了改革以来中国大规模人口迁移的空间分布特征、决定因素,及其与市场化改革之间的关系.城乡二元分割的户籍制度使得中国大规模人口迁移在经济转型过程中具有区别一般迁移理论的独特之处.伴随经济增长的市场化改革程度和市场发育的不平衡性,是决定人口迁移基本方向的一个重要因素.加快城乡户籍制度改革和劳动力市场建设,特别是清除阻碍劳动力市场发育的各种制度性障碍,将起到引导和规范人口迁移、促进持续经济增长的双重作用.
作者单位：
中国社会科学院人口与劳动经济研究所
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