https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1408108/tcan4550-tcan4550
器件型号：TCAN4550工具与软件：
您好！
我们使用的是集成在 IMX8DXL 处理器中的 TCAN4450模块。 TCAN 模块已成功初始化、但无法发送数据(TX)、并且 RX 正确发生。
当我们尝试从处理器发送消息(TX)时、观察到 TCAN 紧急情况。
下面是 DTS 配置。
&lpspi3 {
pinctrl-names ="默认值"；
pinctrl-0 =<&pinctrl_lpspi3>；
fsl、spi-num-chipselect =<1>；
spi-max-Frequency =<6000000>；
CS-GPIO =<&lsi_GPIO0 16 GPIO_ACTIVE_HIGH>；
状态="正常"；
tcan4x5x1：tcan4x5x@0｛
兼容="ti、tcan4x5x"；
REG =<0>；
pinctrl-names ="默认值"；
#address-cells =<1>；
#size-cells =<1>；
spi-max-frequency =<4000000>；
Bosch、MRAM-cfg =<0x0 3 2 28 10 0 20 12>；
Clocks =<&hclk>、<&cclk>；
时钟名称="hclk"、"cclk"；
interrupt-parent =<&lsio_GPIO3>；
中断=<18 IRQ_TYPE_EDGE_FALLING>；
数据就绪-GPIO =<&lsi_GPIO3 18 GPIO_ACTIVE_HIGH>；
RESET-GPIO =<&EXP2 11 GPIO_ACTIVE_HIGH>；
iw-tcan-prop；
唤醒源；
状态="正常"；
}；
}；
以下是尝试发送数据时的紧急情况
root@imx8dxl-iwg46s：~# insmod /run/media/mmcblk0p1/tcan4x5x.ko
[25.051965]内探头---
[ 25.40915] tcan4x5x spi3.0：M_CAN 器件已注册(IRQ=215、版本=32)
[ 25.419456] tcan4x5x spi3.0 CAN3：TCAN4X5X 成功初始化。
root@imx8dxl-iwg46s：~#
root@imx8dxl-iwg46s：~# ip link set CAN3 up type can bitr[ 33.851928] CAN-3V3：disabling
[ 33.855019] Vref_1v8：禁用
[ 33.858219] USB_OTG1_VBUS：禁用
ATE 250000
[ 36.234793] IPv6：ADDRCONF (NETDEV_CHANGE)：CAN3：链路就绪
root@imx8dxl-iwg46s：~# cansend CAN3 123#aabbccddee
[42.931517]开始----
[ 42.934202]处理程序启动了-----------
[42.938970]第11位标识符
[42.938977] else part of version---------------
[ 42.946910]错误：原子调度：cansend/447/0x00000203
[42.952990]模块链接于：tcan4x5x
[42.956893] CPU：1 PID：447 Comm：cansend not dament 5.15.52+gf266012f09d6 #129
[42.964318]硬件名称: IW-Rainbow-G46M-i.MX8DXL OSM (DT)
[42.969983]呼叫跟踪：
[ 42.972429] dump_backtrace+0x0/0x1a0
[ 42.976116] show_stack+0x1c/0x70
[ 42.979451] dump_stack_lvl+0x68/0x84
[ 42.983124] dump_stack+0x1c/0x38
[ 42.986454]_SCHEDULE_BUG+0x60/0x80
[ 42.990126]__SCHEDULE+0x658/0x710
[42.993627] SCHEDULE+0x74/0x110
[ 42.996869] schedule_timeout+0x80/0xf0
[ 43.000716] WAIT_FOR_COMPENSATION_TIMEOUT+0x80/0x10c
[ 43.005607] fsl_lpspi_transfer_one_0x4c8/0x6e0
[ 43.010153] SPI_TRANSFER_ONE_MESSAGE+0x174/0x1d0
[ 43.014868]__SPI_PUMP_MESSAGE.constprop.0+0x264/0x50c
[ 43.020195]__SPI_SYNC+0x18c/0x1c0
[ 43.023694] SPI_WRITE_THEN_READ+0xf8/0x1e0
[43.027890] tcan4x5x_regmap_read+0x3c/0x64 [tcan4x5x]
[ 43.033051]_regmap_raw_read+0xd8/0x17c
[ 43.036986]_regmap_BUS_READ+0x48/0x80
[ 43.040835]_regmap_read+0x64/0xf0
[ 43.044338] regmap_read+0x50/0x80
[ 43.047752] tcan4x5x_read_reg+0x34/0x60 [tcan4x5x]
[ 43.052652] m_can_tx_handler+0x298/0x89c
[ 43.056672] m_can_start_xmit+0xac/0x14c
[ 43.060610] DEV_hard_start_xmit+0xd8/0x160
[ 43.064803] sch_direct_xmit+0xe8/0x36c
[ 43.068652]__dev_queue_xmit+0x524/0xb6c
[ 43.072677] dev_queue_xmit+0x18/0x24
[ 43.076351] CAN_SEND+0xc0/0x260
[ 43.079592] raW_sendmsg+0x140/0x30c
[ 43.083180] SOCK_WRITE_ITE+0xa4/0x110
[ 43.087028] NEW_SYNC_WRITE+0x174/0x184
[ 43.090877] vfs_WRITE+0x230/0x29c
[ 43.094291] ksys_write+0xdc/0xf4
[ 43.097618]__ARM64_sys_WRITE+0x20/0x2C
[ 43.101554] invoke_syscall+0x48/0x114
[43.105313] el0_Svc_common.constprop.0+0xd4/0xFC
[43.110033] DO_el0_Svc+0x2C/0x94
[43.113361] el0_Svc+0x28/0x80
[ 43.116427] el0t_64_SYNC_HANDER+0xa8/0x130
[ 43.120707] el0t_64_sync+0x1a0/0x1a4
[ 43.124997] putidx 0000 0000 0000 0000 0000 0000 0000
[ 43.132847] M_CAN_TXFQS0000 0000 0000 0000 0000 1100
[ 43.139491] M_CAN_FIFO_ID、---- 0011 0010 0001 0101 0000 0011 0010 0000
[ 43.147313]后-- M_CAN_FIFO_ID、---- 0011 0010 0001 0101 0000 0011 0010 0000
[43.155643]在 FIFO 写入前----
[43.161333] FIFO 写入后即可---
[ 43.166784]内有循环 fifo write-----
[ 43.172771]内有循环 FIFO 可写------------
[43.178959]请求拖延-------
[43.184270]延迟结束-------
[43.189771]未满---
[43.193134]---- [剪切于此处]--------
[ 43.193139]警告：CPU：0 PID：447 at kernel/softirq.c：362 __local_bh_enable_ip+0xac/0xbc
[ 43.193164]已链接的模块：
[43.193168] tcan4x5x
[43.209194]
[43.209202] CPU: 0 PID: 447 Comm: cansend damed: G W 5.15.52+gf266012f09d6 #129.
[ 43.209213]硬件名称：IW-Rainbow-G46M-i.MX8DXL OSM (DT)
[ 43.209218] pstate：00000005 (nzcv daif -pan -uao -tco -dit -ssbs BTYPE=-)
[ 43.209227] PC：_LOCAL_BH_ENABLE_IP+0xac/0xbc
[ 43.209240] lr :_dev_queue_xmit+0x424/0xb6c.
[43.209250] sp : ffff80000af5bb20.
[43.209253] x29: ffff80000af5bb20 x28: ffff000005f38000 x27: 00000000000000000000
[43.209268] x26：ffff000005c59028 x25：ffff000005b91000 x24：0000000000000010
[43.209283] x23：ffff000005b91000 x22：ffff000005e99e00 x21：ff000005b90400
[43.209300] x20：0000000000000000 x19：ffff000005c59000 x18：0000000000000003
[ 43.209314] x17：00000000000000001aeb x16：0000000000000113 x15：000000b4caf04ccf
[ 43.209329] x14：0000000000000245 x13：0000000000000000 x12：0000000000000000
[43.209343] x11：0000000000000002 x10：0000000000000990 x9：ffff80000af5b7a0
[43.209359] x8 : ffffff000005f389f0 x7 : ffffff000005b90540 x6 : ffff000005b90780
[ 43.209378] x5：000000000000000a x4：000000000000000a x3：ffffff000005b904d8.
[ 43.209391] x2 : 0000000000000000 x1 : 0000000000000200 x0 : 00000000fffffe.
[43.209409]呼叫跟踪：
[ 43.209414]__LOCAL_BH_ENABLE_IP+0xac/0xbc
[ 43.209425]__dev_queue_xmit+0x424/0xb6c
[ 43.209435] dev_queue_xmit+0x18/0x24
[ 43.209445] can_send+0xc0/0x260
[ 43.209456] raW_sendmsg+0x140/0x30c
[ 43.209465] SOCK_WRITE_ITE+0xa4/0x110
[ 43.209480] NEW_SYNC_WRITE+0x174/0x184
[ 43.209494] vfs_WRITE+0x230/0x29c
[ 43.209505] ksys_write+0xdc/0xf4
[ 43.209518]__ARM64_sys_WRITE+0x20/0x2C
[ 43.209529] Invoke_syscall+0x48/0x114
[43.209540] el0_Svc_common.constprop.0+0xd4/0xFC
[43.209554] DO_el0_Svc+0x2C/0x94
[43.209567] el0_Svc+0x28/0x80
[ 43.209578] el0t_64_sync_handler+0xa8/0x130
[ 43.209586] el0t_64_SYNC+0x1a0/0x1a4
[ 43.209595][结束跟踪1101eba41d86a994 ]--
[43.209712]无法处理虚拟地址0000ffff84049df0处的内核分页请求
[ 43.209726]存储器中止信息：
[ 43.209728] ESR = 0x82000007
[ 43.209731] EC = 0x20：IABT (较低 EL)、IL = 32位
[ 43.209737]设置= 0、FNV = 0
[ 43.209741] EA = 0、S1PTW = 0
[ 43.209744] FSC = 0x07：3级转换故障
[43.209749]用户 pgtable：4K 页、48位 vas、pgdp=0000000094a20000
[ 43.209755][0000ffff84049df0] pgd=0800000085ee3003、p4d=0800000085ee3003、pud=0800000085c1d003、pmd=0800000085c25003、pte=0000000000000000
[ 43.209776]内部错误：Oops：82000007 [#1] preempty SMP
[43.209782] Modules linked in：tcan4x5x
[ 43.209790] CPU：0 PID：447 Comm：cansend 污染：G W 5.15.52+gf266012f09d6 #129
[ 43.209799]硬件名称：IW-Rainbow-G46M-i.MX8DXL OSM (DT)
[ 43.209803] pstate：20000000 (NzCv daif -pan -uaO -tco -dit -ssbs BTYPE=-)
[43.209812] PC : 0000ffff84049df0
[43.209815] LR : 0000ffff83fd06d0
[43.209817] sp : 0000fffffd6ba8250
[43.209820] x29：0000ffffd6ba8250 x28：0000ffffff8417c350 x27：0000aaaad3e13b88
[43.209834] x26：0000ffffd6ba82d0 x25：000000000000 x24：0000ffff8417aaf8.
[43.209850] x23：0000ffff8412c000 x22：0000000000000004 x21：0000ffff8412c748
[43.209864] x20：0000aaaad3e14008 x19：0000ffffff8412c728 x18：fffffffffffffffffffffffffff000
[ 43.209881] x17：0000000000000000 x16：0000000000000000 x15：0000ffff84175da0
[43.209894] x14：0000ffffff8417c000 x13：0000ffffff8417bb60 x12：0000ffff841740b0
[43.209909] x11：0000ffffd6ba82c0 x10：0000210000000000 x9：0000ffffd6ba82bf
[ 43.209924] x8 : 0000000000000020 x7 : 0000ffffff8417c930 x6 : 0000ffff8417c350
[ 43.209939] x5 : 000000000000017f x4 : 0000ffff8417bab0 x3 : 00000000000000000000
[ 43.209953] x2 : 0000ffffff8412cb60 x1 : 0000000000000001 x0 : 0000aaaad3e14008.
[43.546303]--[结束跟踪1101eba41d86a995 ]--
[ 43.546310]内核严重-未同步：哎呀：中断中出现致命异常
[43.546316] SMP：停止辅助 CPU
[ 43.546324]内核偏移：禁用
[ 43.546327] CPU 特性：0x00000,001,20000846
[43.546333]内存限制：无
[ 43.572634]--[结束内核恐慌-未同步:哎呀:中断中的致命异常]--
