我正在运行一个带有两个CAN通道的程序(使用TowerTech CAN Cape TT3201)。
这两个通道是can0(500k)和can1(125k)。can0通道正常工作,但can1会出现写入“无可用缓冲区”的错误。
我正在使用ValueCAN3/VehicleSpy检查消息。
这是在我运行程序之前。can0和can1都似乎发送了消息,但只有can0出现在VehicleSpy中。
root@cantool:~# cansend can0 100#00
root@cantool:~# cansend can1 100#20
这是我尝试运行程序后的结果
root@cantool:~# cansend can1 100#20
write: No buffer space available
root@cantool:~# cansend can0 111#10
当我的程序正在运行时:我对要在can1上发送的所有消息都收到了这个错误
2016-11-02 15:36:03,052 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 12f83018 010 1 00
2016-11-02 15:36:03,131 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 0af81118 010 6 00 00 00 00 00 00
2016-11-02 15:36:03,148 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 12f81018 010 6 00 00 00 00 00 00
2016-11-02 15:36:03,174 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 0af87018 010 3 00 00 00
2016-11-02 15:36:03,220 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 12f89018 010 4 00 00 00 00
2016-11-02 15:36:03,352 - can.socketcan.native.tx - WARNING - Failed to send: 0.000000 12f83018 010 1 00
然而有时整个程序会完美运行(如果模块被重新启动或发生某些随机事件)。
我该如何解决这个问题?
root@cantool:~# uname -r
4.1.15-ti-rt-r43
经过一番搜索,我找到了这个。
root@cantool:-#ip -details link show can0
4:can0: <NOARP,UP,LOWER_UP, ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 10
link/can promiscuity 0
can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 100
bitrate 500000 sample-point 0.875
tq 125 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
c_can: tseg1 2..16 tseg2 1..8 sjw 1..4 brp 1..1024 brp-inc 1
clock 24000000
root@cantool:-#ip -details link show can1
5: can1: <NOARP,UP,LOWER_UP, ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 10
link/can promiscuity 0
can state STOPPED restart-ms 100
bitrate 125000 sample-point 0.875
tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
c_can: tseg1 2..16 tseg2 2..8 sjw 1..4 brp 1..64 brp-inc 1
clock 8000000
原来can1由于某些原因已经停止
但是当我尝试:
ip link set can1 type can restart
RNETLINK answers: Invalid argument
ip link set can0 txqueuelen 1000
- Dawierha