I am using the Sabre Infotainment platform for CAN communications. My problem is that I am unable to send packets successfully or receive packets successfully. I have a device that sends CAN frames onto the bus. The Sabre platform show continuous hardware interrupts but only 2 packets are received.
Additionally, the command "cansend 123#112233445566" does not return, but hangs indefinitely.
Does anyone have experience in the area?
I have ported 2.6.39 flexcan code into the 2.6.35 kernel. I have also compiled the libsocketcan and canutils into by root file system. This is what I am seeing:
root@freescale ~$ ip link set can0 up type can bitrate 250000
flexcan flexcan.0: writing ctrl=0x05312005
root@freescale ~$ ifconfig
can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:16 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:16 (16.0 B) TX bytes:0 (0.0 B)
Interrupt:82
root@freescale ~$ ip -s -d link show can0
2: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
link/can
can state ERROR-PASSIVE (berr-counter tx 0 rx 128) restart-ms 0
bitrate 250000 sample-point 0.875
tq 250 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
clock 24000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 1 1 0
RX: bytes packets errors dropped overrun mcast
16 2 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
root@freescale ~$
root@freescale ~$ cat /proc/interrupts
CPU0
1: 1135 MXC_TZIC mxsdhci
2: 0 MXC_TZIC mxsdhci
6: 1 MXC_TZIC mxc_sdma
8: 2 MXC_TZIC mxc_nd
9: 0 MXC_TZIC VPU_CODEC_IRQ
10: 0 MXC_TZIC mxc_ipu
11: 1 MXC_TZIC mxc_ipu
12: 0 MXC_TZIC ydx
14: 0 MXC_TZIC usb_wakeup, ehci_hcd:usb2
16: 0 MXC_TZIC usb_wakeup, ehci_hcd:usb3
18: 0 MXC_TZIC usb_wakeup, fsl-usb2-otg, ehci_hcd:usb1, fsl-usb2-udc
24: 0 MXC_TZIC mxc_rtc
28: 0 MXC_TZIC ahci
31: 1377 MXC_TZIC mxcintuart
36: 1 MXC_TZIC CSPI_IRQ
39: 4965 MXC_TZIC i.MX Timer Tick
63: 198 MXC_TZIC imx-i2c
64: 60 MXC_TZIC imx-i2c
66: 0 MXC_TZIC asrc
69: 0 MXC_TZIC mxc_iim
73: 0 MXC_TZIC dvfs
82: 420454 MXC_TZIC can0
84: 0 MXC_TZIC g12
129: 0 - mxsdhci
132: 0 - mxsdhci
191: 0 - eth0
Err: 0
root@freescale ~$
