TI中文支持网Part Number:AM4378
我在设备树文件中，添加了SPI0和SPI4的设备结点，如图片1所示。然后会在/dev目录下生成spidev1.0和spidev2.0，我在我的应用程序中调用/dev/spidev1.0来调用SPI0，然后连接SPI0的相关引脚，通过ioctl接口来进行SPI通信，SPI0是可以正常使用的。
但是当我在程序中只更改/dev/spidev1.0为/dev/spidev2.0时，并连接了SPI4的相关引脚，就不能进行SPI通信了。
我用spidev_test测试程序短接SPI4的收发引脚时，是可以收到数据的，但为什么我的应用程序中不能调用SPI4呢？
应用程序中的相关代码如下所示：
spi0.device = "/dev/spidev2.0"
spi->fd_spi = open(spi->device,O_RDWR | O_NONBLOCK)
调用ioctl代码：
ret=ioctl（fd，SPI_IOC_MESSAGE（1），&tr）
我想解决一下SPI4不可以调用的问题，非常感谢！
Nancy Wang：
am4378是master吗？您目前是tx/rx短接是可以收到数据，但是与slave端设备无法通信是吗？
spi1和spi4引脚接法都是相同的吗？主要是D0/D1脚。
,
user6505605：
对，都是相同的，我只是把spidev1.0换成了2.0，然后把引脚换了，然后就不能通信了，我发现好像是在应用程序中调用ioctl那一步出的问题，但测试程序中也会有ioctl接口，短接时没问题，但到了我的程序中就会在这一步卡死。
,
user6505605：
对，AM4378是master
,
Nancy Wang：
我需要咨询相关工程师再给您回复。
,
user6505605：
好的，期待您的回复。
,
Nancy Wang：
将代码修改为 spidev@4, reg =<0x4>试一下。
如果不是这个问题的话
1、请将启动log贴出来看一下，是否有异常。
2、spi0和spi4是同时使用的还是单独使用的？
3、slave端接的什么设备？
,
user6505605：
您好，我现在好像可以使用SPI4了，但是传输的前一段时间数据会乱，过一段时间就会恢复正常，我不知道是能用还是不能用，但应该是通了。
按照您的更改后，perror报错：Bad file descriptor
1.log在我插入的附件中6518.log.txt
[0.338375] media: Linux media interface: v0.10 [0.338456] Linux video capture interface: v2.00 [0.338520] pps_core: LinuxPPS API ver. 1 registered [0.338530] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it> [0.338567] PTP clock support registered [0.339504] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400 [0.339843] Advanced Linux Sound Architecture Driver Initialized. [0.341076] Switched to clocksource timer1 [0.353197] NET: Registered protocol family 2 [0.354127] TCP established hash table entries: 4096 (order: 2, 16384 bytes) [0.354187] TCP bind hash table entries: 4096 (order: 2, 16384 bytes) [0.354254] TCP: Hash tables configured (established 4096 bind 4096) [0.354356] UDP hash table entries: 256 (order: 0, 4096 bytes) [0.354379] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) [0.354564] NET: Registered protocol family 1 [0.354947] RPC: Registered named UNIX socket transport module. [0.354962] RPC: Registered udp transport module. [0.354971] RPC: Registered tcp transport module. [0.354979] RPC: Registered tcp NFSv4.1 backchannel transport module. [0.355020] PCI: CLS 0 bytes, default 64 [0.357747] futex hash table entries: 256 (order: -1, 3072 bytes) [0.357854] audit: initializing netlink subsys (disabled) [0.357917] audit: type=2000 audit(0.340:1): initialized [0.365649] VFS: Disk quotas dquot_6.6.0 [0.365888] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [0.368245] NFS: Registering the id_resolver key type [0.368310] Key type id_resolver registered [0.368320] Key type id_legacy registered [0.368402] jffs2: version 2.2. (NAND) (SUMMARY)\xffffffc2\xffffffa9 2001-2006 Red Hat, Inc. [0.370430] NET: Registered protocol family 38 [0.370510] io scheduler noop registered [0.370529] io scheduler deadline registered [0.370602] io scheduler cfq registered (default) [0.373393] pinctrl-single 44e10800.pinmux: 199 pins at pa f9e10800 size 796 [0.376259] pwm-backlight backlight: GPIO lookup for consumer enable [0.376281] pwm-backlight backlight: using device tree for GPIO lookup [0.376300] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/backlight[0]' [0.376313] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/backlight[0]' [0.376324] pwm-backlight backlight: using lookup tables for GPIO lookup [0.376338] pwm-backlight backlight: lookup for GPIO enable failed [0.376359] backlight supply power not found, using dummy regulator [0.378696] 4832a000.dss supply vdda_video not found, using dummy regulator [0.378829] OMAP DSS rev 2.0 [0.379332] omapdss_dss 4832a000.dss: bound 4832a400.dispc (ops dispc_component_ops) [0.381548] panel-dpi display: GPIO lookup for consumer enable [0.381569] panel-dpi display: using device tree for GPIO lookup [0.381586] of_get_named_gpiod_flags: can't parse 'enable-gpios' property of node '/display[0]' [0.381598] of_get_named_gpiod_flags: can't parse 'enable-gpio' property of node '/display[0]' [0.381610] panel-dpi display: using lookup tables for GPIO lookup [0.381624] panel-dpi display: lookup for GPIO enable failed [0.382421] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle [0.383836] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled [0.388051] omap_uart 44e09000.serial: no wakeirq for uart0 [0.388076] of_get_named_gpiod_flags: can't parse 'rts-gpio' property of node '/ocp/serial@44e09000[0]' [0.388096] omap_uart 44e09000.serial: No clock speed specified: using default: 48000000 [0.388279] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 30, base_baud = 3000000) is a OMAP UART0 [1.133761] console [ttyO0] enabled [1.138136] omap_uart 481aa000.serial: no wakeirq for uart5 [1.144146] of_get_named_gpiod_flags: parsed 'rts-gpio' property of node '/ocp/serial@481aa000[0]' - status (0) [1.144185] omap_uart 481aa000.serial: No clock speed specified: using default: 48000000 [1.152931] 481aa000.serial: ttyO5 at MMIO 0x481aa000 (irq = 31, base_baud = 3000000) is a OMAP UART5 [1.163454] [drm] Initialized drm 1.1.0 20060810 [1.181759] brd: module loaded [1.190991] loop: module loaded [1.195666] mtdoops: mtd device (mtddev=name/number) must be supplied [1.204402] omap2_mcspi 48030000.spi: registered master spi1 [1.204713] spi spi1.0: setup: speed 48000000, sample leading edge, clk normal [1.204741] spi spi1.0: setup mode 0, 8 bits/w, 48000000 Hz max --> 0 [1.205322] omap2_mcspi 48030000.spi: registered child spi1.0 [1.205901] omap2_mcspi 48345000.spi: registered master spi2 [1.206079] spi spi2.0: not using DMA for McSPI (-19) [1.211538] spi spi2.0: setup: speed 48000000, sample leading edge, clk normal [1.211562] spi spi2.0: setup mode 0, 8 bits/w, 48000000 Hz max --> 0 [1.212129] omap2_mcspi 48345000.spi: registered child spi2.0 [1.271141] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6 [1.277612] davinci_mdio 4a101000.mdio: detected phy mask ffffffef [1.285120] Atheros 8035 ethernet 4a101000.mdio:04: GPIO lookup for consumer reset [1.285144] Atheros 8035 ethernet 4a101000.mdio:04: using lookup tables for GPIO lookup [1.285159] Atheros 8035 ethernet 4a101000.mdio:04: lookup for GPIO reset failed [1.285178] libphy: 4a101000.mdio: probed [1.289435] davinci_mdio 4a101000.mdio: phy[4]: device 4a101000.mdio:04, driver Atheros 8035 ethernet [1.300127] cpsw 4a100000.ethernet: Detected MACID = 6c:c3:74:49:9e:79 [1.308043] cpsw 4a100000.ethernet: cpsw: Detected MACID = 6c:c3:74:49:9e:7b [1.317390] mousedev: PS/2 mouse device common for all mice [1.323487] i2c /dev entries driver [1.328889] omap_hsmmc 48060000.mmc: GPIO lookup for consumer cd [1.328910] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup [1.328974] of_get_named_gpiod_flags: parsed 'cd-gpios' property of node '/ocp/mmc@48060000[0]' - status (0) [1.329051] omap_hsmmc 48060000.mmc: Got CD GPIO [1.334073] omap_hsmmc 48060000.mmc: GPIO lookup for consumer wp [1.334090] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup [1.334105] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@48060000[0]' [1.334118] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@48060000[0]' [1.334130] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup [1.334144] omap_hsmmc 48060000.mmc: lookup for GPIO wp failed [1.361553] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer cd [1.361573] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup [1.361589] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@481d8000[0]' [1.361602] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@481d8000[0]' [1.361614] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup [1.361627] omap_hsmmc 481d8000.mmc: lookup for GPIO cd failed [1.361642] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer wp [1.361653] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup [1.361665] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@481d8000[0]' [1.361677] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@481d8000[0]' [1.361688] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup [1.361700] omap_hsmmc 481d8000.mmc: lookup for GPIO wp failed [1.391562] ledtrig-cpu: registered to indicate activity on CPUs [1.398672]remoteproc0: wkup_m3 is available [1.403487]remoteproc0: Note: remoteproc is still under development and considered experimental. [1.413013]remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed. [1.426626] oprofile: no performance counters [1.431510] oprofile: using timer interrupt. [1.436414] Initializing XFRM netlink socket [1.440979] NET: Registered protocol family 17 [1.445815] NET: Registered protocol family 15 [1.450666] Key type dns_resolver registered [1.455445] omap_voltage_late_init: Voltage driver support not added [1.462649] cpu cpu0: of_pm_voltdm_notifier_register: Failed to get cpu0 regulator/voltdm: -517 [1.471922] cpu cpu0: cpu0 clock notifier not ready, retry [1.478140] ThumbEE CPU extension supported. [1.482726] Registering SWP/SWPB emulation handler [1.490946] omapdrm omapdrm.0: DMM not available, disable DMM support [1.499356] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [1.506452] [drm] No driver support for vblank timestamp query. [1.559337] Console: switching to colour frame buffer device 100x30 [1.581307] omapdrm omapdrm.0: fb0: omapdrm frame buffer device [1.587574] omapdrm omapdrm.0: registered panic notifier [1.621116] [drm] Initialized omapdrm 1.0.0 20110917 on minor 0 [1.641310] rtc-ds1307: probe of 0-0068 failed with error -5 [1.668041] omap_i2c 44e0b000.i2c: bus 0 rev0.12 at 100 kHz [1.675752] omap_i2c 4802a000.i2c: bus 1 rev0.12 at 100 kHz [1.683046] omap_hsmmc 48060000.mmc: GPIO lookup for consumer cd [1.683067] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup [1.683129] of_get_named_gpiod_flags: parsed 'cd-gpios' property of node '/ocp/mmc@48060000[0]' - status (0) [1.683196] omap_hsmmc 48060000.mmc: Got CD GPIO [1.688095] omap_hsmmc 48060000.mmc: GPIO lookup for consumer wp [1.688108] omap_hsmmc 48060000.mmc: using device tree for GPIO lookup [1.688122] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@48060000[0]' [1.688135] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@48060000[0]' [1.688147] omap_hsmmc 48060000.mmc: using lookup tables for GPIO lookup [1.688160] omap_hsmmc 48060000.mmc: lookup for GPIO wp failed [1.688854]remoteproc0: powering up wkup_m3 [1.693552]remoteproc0: Booting fw image am335x-pm-firmware.elf, size 219803 [1.702261]remoteproc0: remote processor wkup_m3 is now up [1.708268] wkup_m3_ipc 44e11324.wkup_m3_ipc: CM3 Firmware Version = 0x191 [1.722103] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer cd [1.722124] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup [1.722141] of_get_named_gpiod_flags: can't parse 'cd-gpios' property of node '/ocp/mmc@481d8000[0]' [1.722155] of_get_named_gpiod_flags: can't parse 'cd-gpio' property of node '/ocp/mmc@481d8000[0]' [1.722167] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup [1.722181] omap_hsmmc 481d8000.mmc: lookup for GPIO cd failed [1.722196] omap_hsmmc 481d8000.mmc: GPIO lookup for consumer wp [1.722207] omap_hsmmc 481d8000.mmc: using device tree for GPIO lookup [1.722218] of_get_named_gpiod_flags: can't parse 'wp-gpios' property of node '/ocp/mmc@481d8000[0]' [1.722230] of_get_named_gpiod_flags: can't parse 'wp-gpio' property of node '/ocp/mmc@481d8000[0]' [1.722241] omap_hsmmc 481d8000.mmc: using lookup tables for GPIO lookup [1.722252] omap_hsmmc 481d8000.mmc: lookup for GPIO wp failed [1.761566] cpu cpu0: of_pm_voltdm_notifier_register: Fail calculating voltage latency[950000<->1325000]:-22 [1.772359] cpu cpu0: of_pm_voltdm_notifier_register: Fail calculating voltage latency[950000<->1325000]:-22 [1.786100] hctosys: unable to open rtc device (rtc0) [1.800899] ALSA device list: [1.804160]No soundcards found. [1.808246] Waiting for root device PARTUUID=ca74a542-02... [1.834782] mmc1: MAN_BKOPS_EN bit is not set [1.842557] mmc1: new high speed MMC card at address 0001 [1.848713] mmcblk0: mmc1:0001 Q2J54A 3.59 GiB[1.853717] mmcblk0boot0: mmc1:0001 Q2J54A partition 1 16.0 MiB [1.860083] mmcblk0boot1: mmc1:0001 Q2J54A partition 2 16.0 MiB [1.867596]mmcblk0: p1 p2 p3 [2.119570] EXT4-fs (mmcblk0p2): recovery complete [2.125116] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [2.133773] VFS: Mounted root (ext4 filesystem) on device 179:2. [2.141187] devtmpfs: mounted [2.144841] Freeing unused kernel memory: 276K (c08af000 - c08f4000) [2.319911] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null) [2.936986] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec [2.962149] of_get_named_gpiod_flags: parsed 'gpios' property of node '/volume_keys@0/switch@1[0]' - status (0) [2.962203] of_get_named_gpiod_flags: parsed 'gpios' property of node '/volume_keys@0/switch@2[0]' - status (0) [2.962660] input: volume_keys@0 as /devices/platform/volume_keys@0/input/input0 [2.991167] cfg80211: Calling CRDA to update world regulatory domain [3.026150] NET: Registered protocol family 10 [3.038966] omap-aes 53501000.aes: OMAP AES hw accel rev: 0.1 [3.050931] omap-sham 53100000.sham: hw accel on OMAP rev 0.0 [3.073126] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20 [3.180366] udevd[122]: starting version 3.2.1 [3.192902] random: udevd urandom read with 32 bits of entropy available [3.244480] udevd[123]: starting eudev-3.2.1 [3.572329] ov2659 0-0030: GPIO lookup for consumer pwrdn [3.572349] ov2659 0-0030: using device tree for GPIO lookup [3.572362] of_get_named_gpiod_flags: can't parse 'pwrdn-gpios' property of node '/ocp/i2c@44e0b000/ov2659@30[0]' [3.572370] of_get_named_gpiod_flags: can't parse 'pwrdn-gpio' property of node '/ocp/i2c@44e0b000/ov2659@30[0]' [3.572377] ov2659 0-0030: using lookup tables for GPIO lookup [3.572386] ov2659 0-0030: lookup for GPIO pwrdn failed [3.575972] ov2659 0-0030: Sensor detection failed (3030, 0) [3.596683] input: tps65218_pwrbutton as /devices/platform/44000000.ocp/44e0b000.i2c/i2c-0/0-0024/44e0b000.i2c:tps65218@24:power-button/input/input1 [3.618332] ov2659 1-0030: GPIO lookup for consumer pwrdn [3.618353] ov2659 1-0030: using device tree for GPIO lookup [3.618366] of_get_named_gpiod_flags: can't parse 'pwrdn-gpios' property of node '/ocp/i2c@4802a000/ov2659@30[0]' [3.618375] of_get_named_gpiod_flags: can't parse 'pwrdn-gpio' property of node '/ocp/i2c@4802a000/ov2659@30[0]' [3.618382] ov2659 1-0030: using lookup tables for GPIO lookup [3.618391] ov2659 1-0030: lookup for GPIO pwrdn failed [3.630392] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0 [3.634308] ov2659 1-0030: Sensor detection failed (3030, 0) [3.645408] input: ti-tsc as /devices/platform/44000000.ocp/44e0d000.tscadc/TI-am335x-tsc/input/input2 [3.656561] of_get_named_gpiod_flags: parsed 'tp_int' property of node '/ocp/i2c@4802a000/ft0x5x_ts@38[0]' - status (0) [3.656605] of_get_named_gpiod_flags: parsed 'tp_resetn' property of node '/ocp/i2c@4802a000/ft0x5x_ts@38[0]' - status (0) [3.656611] tp reset gpio=119 [3.671615] ft5x0x id: 0xF830 [3.696090] input: ft5x06_ts as /devices/virtual/input/input3 [3.697043] sgtl5000: probe of 1-000a failed with error -121 [3.703521] ft5x0x_ts_init successful [3.717958] CAN device driver interface [3.729816] c_can_platform 481cc000.can: c_can_platform device registered (regs=fa1cc000, irq=261) [3.748146] c_can_platform 481d0000.can: c_can_platform device registered (regs=fa1d0000, irq=262) [3.972805] omap-des 53701000.des: OMAP DES hw accel rev: 0.33 [4.018624] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@0[0]' - status (0) [4.018836] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@1[0]' - status (0) [4.019024] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@2[0]' - status (0) [4.019146] of_get_named_gpiod_flags: parsed 'gpios' property of node '/leds/led@3[0]' - status (0) [4.067722] PM: bootloader does not support rtc-only! [5.192965] usbcore: registered new interface driver usbfs [5.193963] usbcore: registered new interface driver hub [5.194897] usbcore: registered new device driver usb [5.208488] dwc3 48390000.usb: otg: primary host xhci-hcd.0.auto registered [5.208514] dwc3 48390000.usb: otg: shared host xhci-hcd.0.auto registered [5.208522] dwc3 48390000.usb: otg: can't start till gadget registers [5.209325] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller [5.209365] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 1 [5.209975] xhci-hcd xhci-hcd.1.auto: hcc params 0x0238f06d hci version 0x100 quirks 0x00210010 [5.210030] xhci-hcd xhci-hcd.1.auto: irq 301, io mem 0x483d0000 [5.210196] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [5.210208] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [5.210216] usb usb1: Product: xHCI Host Controller [5.210223] usb usb1: Manufacturer: Linux 4.1.18 xhci-hcd [5.210230] usb usb1: SerialNumber: xhci-hcd.1.auto [5.212735] hub 1-0:1.0: USB hub found [5.212802] hub 1-0:1.0: 1 port detected [5.214322] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller [5.214351] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 2 [5.214481] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM. [5.214590] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003 [5.214601] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [5.214608] usb usb2: Product: xHCI Host Controller [5.214616] usb usb2: Manufacturer: Linux 4.1.18 xhci-hcd [5.214623] usb usb2: SerialNumber: xhci-hcd.1.auto [5.215957] hub 2-0:1.0: USB hub found [5.216015] hub 2-0:1.0: 1 port detected [5.990998] net eth0: initializing cpsw version 1.15 (0) [6.071734] net eth0: phy found : id is : 0x4dd072 [6.079004] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [6.100901] net eth1: initializing cpsw version 1.15 (0) [6.118672] libphy: PHY 4a101000.mdio:01 not found [6.151319] net eth1: phy 4a101000.mdio:01 not found on slave 1 [6.160469] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready [6.161832] cfg80211: Calling CRDA to update world regulatory domain [6.675575]*******************register dev success [6.675665] request gpio irq success*******************[9.072152] cpsw 4a100000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx [9.072226] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [9.301306] 8021q: 802.1Q VLAN Support v1.8 [9.301367] 8021q: adding VLAN 0 to HW filter on device eth0 [9.301461] 8021q: adding VLAN 0 to HW filter on device eth1 [9.311504] cfg80211: Calling CRDA to update world regulatory domain [11.165511] spidev spi2.0: not using DMA for McSPI (-19) [11.174699] There is't a process to receive the spi0 signal [11.177025] spidev spi2.0: setup: speed 48000000, sample trailing edge, clk normal [11.177057] spidev spi2.0: setup mode 1, 8 bits/w, 48000000 Hz max --> 0 [11.177066] spidev spi2.0: spi mode 1 [11.177246] spidev spi2.0: not using DMA for McSPI (-19) [11.186902] spidev spi2.0: setup: speed 48000000, sample trailing edge, clk normal [11.186928] spidev spi2.0: setup mode 1, 8 bits/w, 48000000 Hz max --> 0 [11.186937] spidev spi2.0: 8 bits per word [11.187070] spidev spi2.0: not using DMA for McSPI (-19) [11.196182] spidev spi2.0: setup: speed 9600000, sample trailing edge, clk normal [11.196203] spidev spi2.0: setup mode 1, 8 bits/w, 10000000 Hz max --> 0 [11.200232] gpio-114 (sysfs): gpiod_request: status -16 [11.200247] export_store: status -16 [11.219115] send_sync_signal kill SIGIO [11.226398] spidev spi2.0: setup: speed 9600000, sample trailing edge, clk normal [11.253853] spidev spi2.0: setup: speed 48000000, sample trailing edge, clk normal [11.297812] send_sync_signal kill SIGIO [11.299606] spidev spi2.0: setup: speed 9600000, sample trailing edge, clk normal [11.327272] spidev spi2.0: setup: speed 48000000, sample trailing edge, clk normal [12.461247] cfg80211: Calling CRDA to update world regulatory domain [12.991201] random: nonblocking pool is initialized [15.611208] cfg80211: Calling CRDA to update world regulatory domain [15.631040] send_sync_signal kill SIGIO [15.635827] spidev spi2.0: setup: speed 9600000, sample trailing edge, clk normal [15.668959] spidev spi2.0: setup: speed 48000000, sample trailing edge, clk normal [15.700488] gpio-116 (sysfs): gpiod_request: status -16 [15.700523] export_store: status -162.SPI4和SPI0都是单独测试的
3.slave端接的是STM32F407VET6
