Dear Sir:
Hi,i have sucessfully used SocketCan in s3c6410 2.6.29 BSP with
merge socketcan svn tree,I use 2 development board to communicate to test,all
are mcp2515 chip.
[root@Tommy canbustest]# ifconfig can0
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:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:8 (8.0 B) TX bytes:8 (8.0 B)
Thanks for all.
B.R
Tommy
At 2011-10-31 18:38:40,"Marc Kleine-Budde" <m...@pengutronix.de> wrote:
>On 10/31/2011 11:13 AM, Tommy wrote:
>> Dear folks:
>> Hi,i met a bus off in S3C64XX SockCan,from lower-level spi
>> read/write,seems mcp2515 read/write is OK,but when i use cansend to send
>> data ,mcp2515 enter bus off mode,what should i go on debuging or verfy
>> hardware is no problem? please give me suggestions,i will read mcp2515
>> datasheet and socketcan carefully in deep.
>>
>> Kernel booting log:
>>
>> Driver 'sd' needs updating - please use bus_type methods
>> drivers/spi/spi_s3c.c:s3c_spi_init:1149
>> drivers/spi/spi_s3c.c:s3c_spi_probe:842 ID=0
>>
>> mcp251x_read_reg
>>
>> mcp251x_spi_trans
>>
>> mcp251x_read_reg
>>
>> mcp251x_spi_trans
>>
>> mcp251x_read_reg
>>
>> mcp251x_spi_trans
>> mcp251x spi0.0: CANSTAT 0x80 CANCTRL 0x07
>>
>> mcp251x_write_reg
>>
>> mcp251x_spi_trans
>> mcp251x spi0.0: probed
>>
>> Samsung SoC SPI Driver loaded for Bus SPI-0 with 1 Slaves attached
>> Max,Min-Speed [33250000, 129882]Hz
>> Irq=80 IOmem=[0x7f00bfff-0x7f00b000] DMA=[Rx-33, Tx-34]
>> usbmon: debugfs is not available
>>
>>
>> here is debug step:
>>
>>
>> 2)ifconfig can0 up
>>
>> 3)./cansend can0 111#1122334455667788
>
>I suggest you try to first receive a canframe from another proven
>working station. Or even better, first build a working CAN network, then
>attach your mcp2515 and listen.
>
>>
>>
>> debug log:
>> [root@Tommy canbustest]# ./ip link set can0 type can bitrate 125000
>> triple-sampl
>> ing on
>
>try without the "triple-sampling on"
>
>regards, Marc
>
>--
>Pengutronix e.K. | Marc Kleine-Budde |
>Industrial Linux Solutions | Phone: +49-231-2826-924 |
>Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
>Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
>
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