AM5728: DCAN issues

Hi,

The software team have been notified. They will respond here.

Hi Biser,
Thanks for your help, I will wait for the software team to respond.
Better

Hi Biser,

You are talking about here?

Yes, please check the connections on the processor side. ISO1050 RX pin is output, and TX is input.

Hi Biser,

My ISO1050 RX pin is connected to the processor TX，is output.

ISO1050 TX pin is connected to the processor RX，is input.

This connection is the opposite?
I should RX connects to RX，TX connects to TX？

Thanks.

Better

Hi Biser,

You are right,I refer to the am335X EVM design, and you said the same.
Such as our hardware engineers to change the connection I will tell you the results of software testing, may be two days later.

Thanks.
Better

Hi Biser,

Your suggestion is correct, I pin the correct connection has improved, but there are still some problems.
I connect two boards with DB9F-DB9F straight cable.

When I set the bit rate is no problem.(use " ip link set can0 type can bitrate 50000 triple-sampling on " command)

I bring up the device in which a plate appeared as follows print:
root@am57xx-evm:~# ip link set can0 up
[ 762.012487] net can0: c_can_hw_raminit_wait_syscon: time out
[ 762.018391] c_can_platform 4ae3c000.can can0: setting BTR=1c18 BRPE=0000

When I would like to set up two boards were sent and received there is not the same information:
root@am57xx-evm:~# cansend can0 -i 0x10 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88
interface = can0, family = 29, type = 3, proto = 1
root@am57xx-evm:~# dmesg | grep can
[ 5.836458] ahci 4a140000.sata: SSS flag set, parallel bus scan disabled
[ 6.056142] pinctrl-single 4a003400.pinmux: could not add functions for dcan1_pins_default 14288x
[ 6.056800] c_can_platform 4ae3c000.can: c_can_platform device registered (regs=fce3c000, irq=352)
[ 762.012487] net can0: c_can_hw_raminit_wait_syscon: time out
[ 762.018391] c_can_platform 4ae3c000.can can0: setting BTR=1c18 BRPE=0000
[ 1036.826664] can: controller area network core (rev 20120528 abi 9)
[ 1036.842855] can: raw protocol (rev 20120528)
[ 2266.329873] c_can_platform 4ae3c000.can can0: entered error warning state <--------------
[ 2266.339552] c_can_platform 4ae3c000.can can0: entered error passive state <--------------

interface = can0, family = 29, type = 3, proto = 1
^C
root@am57xx-evm:~# dmesg | grep can
[ 6.121183] ahci 4a140000.sata: SSS flag set, parallel bus scan disabled
[ 6.272289] pinctrl-single 4a003400.pinmux: could not add functions for dcan1_pins_default 14288x
[ 6.291229] c_can_platform 4ae3c000.can: c_can_platform device registered (regs=fce3c000, irq=352)
[ 779.303727] net can0: c_can_hw_raminit_wait_syscon: time out
[ 779.309570] c_can_platform 4ae3c000.can can0: setting BTR=1c18 BRPE=0000
[ 1089.981807] can: controller area network core (rev 20120528 abi 9)
[ 1089.998220] can: raw protocol (rev 20120528)

When I set the device to receive mode when the two lines of print is gone.

I hope your software team can help me solve this problem.

Thanks.

Butter

Hi Biser,
These I have tried, the error is the same.

root@am57xx-evm:~# canconfig can0 bitrate 1000000 ctrlmode triple-sampling on
can0 bitrate: 1000000, sample-point: 0.750
can0 ctrlmode: loopback[OFF], listen-only[OFF], tripple-sampling[ON],one-shot[OFF], berr-reporting[OFF]
root@am57xx-evm:~# canconfig can0 start
[ 152.712228] net can0: c_can_hw_raminit_wait_syscon: time out
[ 152.718141] c_can_platform 4ae3c000.can can0: setting BTR=4d00 BRPE=0000
can0 state: ERROR-ACTIVE

root@am57xx-evm:~# 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:0 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:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:96

root@am57xx-evm:~# cansend can0 -i 0x10 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88
interface = can0, family = 29, type = 3, proto = 1
[ 193.476873] can: controller area network core (rev 20120528 abi 9)
[ 193.483347] NET: Registered protocol family 29
[ 193.493555] can: raw protocol (rev 20120528)

root@am57xx-evm:~# dmesg | grep can
[ 5.826472] ahci 4a140000.sata: SSS flag set, parallel bus scan disabled
[ 5.913916] pinctrl-single 4a003400.pinmux: could not add functions for dcan1_pins_default 14288x
[ 5.931418] c_can_platform 4ae3c000.can: c_can_platform device registered (regs=fce3c000, irq=352)
[ 152.712228] net can0: c_can_hw_raminit_wait_syscon: time out
[ 152.718141] c_can_platform 4ae3c000.can can0: setting BTR=4d00 BRPE=0000
[ 193.476873] can: controller area network core (rev 20120528 abi 9)
[ 193.493555] can: raw protocol (rev 20120528)
[ 193.499988] c_can_platform 4ae3c000.can can0: entered error warning state
[ 193.500468] c_can_platform 4ae3c000.can can0: entered error passive state
[ 218.479082] omap_hwmod: dcan1: _wait_target_disable failed
[ 218.493001] omap_hwmod: dcan1: _wait_target_disable failed
[ 218.507508] omap_hwmod: dcan1: _wait_target_disable failed

root@am57xx-evm:~# candump can0
interface = can0, family = 29, type = 3, proto = 1
The receiver did not receive anything, has been parked here.

root@am57xx-evm:~# lsmod | grep can
can_raw 6589 0
can 29605 1 can_raw
c_can_platform 6604 0
c_can 10171 1 c_can_platform
can_dev 14231 1 c_can

I would like to know there is no problem with my kernel configuration, CAN device also need other drive?

Thanks.

Butter

You must run candump on one board first, and after that run cansend on the other board.

Dear Biser,

Yes, that's what I did.
But when I started the device on the wrong, the back has been wrong.

root@am57xx-evm:~# canconfig can0 bitrate 1000000 ctrlmode triple-sampling on
can0 bitrate: 1000000, sample-point: 0.750
can0 ctrlmode: loopback[OFF], listen-only[OFF], tripple-sampling[ON],one-shot[OFF], berr-reporting[OFF]

root@am57xx-evm:~# canconfig can0 start
[ 189.602296] net can0: c_can_hw_raminit_wait_syscon: time out
[ 189.608198] c_can_platform 4ae3c000.can can0: setting BTR=4d00 BRPE=0000
can0 state: ERROR-ACTIVE

Thanks.
BUtter

Dear Biser,

Now I can test to send and receive, because I am a board interface connection is wrong, but when you start the device will still appear "ERROR-ACTIVE" print.

You say this is the 9-pin? But I refer to AM335XEVM is so connected.

Dear Biser,

Thank you very much for your reply, which helped me a lot.

Thankd.