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This demo assumes that a Micro-B to USB 2.0 A Female cable is plugged into the USB1 interface connector on the NXP i.MX RT1170 EVK board and that a pre-formatted USB Flash disk with an FAT32 partition is plugged into the USB 2.0 A Female connector of the above USB cable.
2. Logging Data onto USB Flash
On power-up or reset, U-Boot loads the Linux and Device Tree images from the SD Card to the SDRAM and passes control to the kernel entry point:
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U-Boot SPL 2023.04 (Sep 01 2023 - 17:34:47 +0000) Trying to boot from MMC1 U-Boot 2023.04 (Sep 01 2023 - 17:34:47 +0000) Model: NXP imxrt1170-evk board DRAM: 960 KiB (effective 64.9 MiB) Core: 72 devices, 15 uclasses, devicetree: separate MMC: FSL_SDHC: 0 Loading Environment from MMC... OK In: serial@4007c000 Out: serial@4007c000 Err: serial@4007c000 Net: eth0: ethernet@40424000 Hit any key to stop autoboot: 0 8489874 bytes read in 755 ms (10.7 MiB/s) ## Booting kernel from Legacy Image at 80007fc0 ... Image Name: Linux-6.1.22 Image Type: ARM Linux Multi-File Image (uncompressed) Data Size: 8489810 Bytes = 8.1 MiB Load Address: 80008000 Entry Point: 80008001 Contents: Image 0: 8480224 Bytes = 8.1 MiB Image 1: 9574 Bytes = 9.3 KiB Verifying Checksum ... OK ## Flattened Device Tree from multi component Image at 80007FC0 Booting using the fdt at 0x8081e5ec Working FDT set to 8081e5ec Loading Multi-File Image Loading Device Tree to 2032a000, end 2032f565 ... OK Working FDT set to 2032a000 Starting kernel ... |
The kernel proceeds to boot-up, initializing the configured I/O interfaces and sub-systems:
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Booting Linux on physical CPU 0x0 Linux version 6.1.22 (sasha@workbench.emcraft.com) (arm-none-eabi-gcc (GNU Arm Embedded Toolchain 10.3-2021.10) 10.3.1 20210824 (release), GNU ld (GNU Arm Embedded Toolchain 10.3-2021.10) 2.36.1.20210621) #2 Fri Sep 1 14:20:49 UTC 2023 CPU: ARMv7-M [411fc272] revision 2 (ARMv7M), cr=00000000 CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache OF: fdt: Machine model: NXP IMXRT1170 EVK board Reserved memory: created DMA memory pool at 0x83f00000, size 1 MiB OF: reserved mem: initialized node dmapool@83f00000, compatible id shared-dma-pool Zone ranges: Normal [mem 0x0000000080000000-0x0000000083ffffff] Movable zone start for each node ... usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti < giometti@linux.it> PTP clock support registered Bluetooth: Core ver 2.22 NET: Registered PF_BLUETOOTH protocol family Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized clocksource: Switched to clocksource mxc_timer1 NET: Registered PF_INET protocol family IP idents hash table entries: 2048 (order: 2, 16384 bytes, linear) tcp_listen_portaddr_hash hash table entries: 1024 (order: 0, 4096 bytes, linear) Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear) TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear) TCP bind hash table entries: 1024 (order: 1, 8192 bytes, linear) TCP: Hash tables configured (established 1024 bind 1024) UDP hash table entries: 256 (order: 0, 4096 bytes, linear) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear) NET: Registered PF_UNIX/PF_LOCAL protocol family RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. Bus freq driver module loaded Initialise system trusted keyrings workingset: timestamp_bits=30 max_order=14 bucket_order=0 fuse: init (API version 7.37) Key type asymmetric registered Asymmetric key parser 'x509' registered Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251) io scheduler mq-deadline registered io scheduler kyber registered 4007c000.serial: ttyLP0 at MMIO 0x4007c010 (irq = 447, base_baud = 1500000) is a FSL_LPUART fsl-lpuart 4007c000.serial: Serial: Console lpuart rounded baud ratefrom 187500 to 115200 printk: console [ttyLP0] enabled PPP generic driver version 2.4.2 PPP BSD Compression module registered PPP Deflate Compression module registered usbcore: registered new interface driver rt2800usb usbcore: registered new interface driver cdc_acm cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters usbcore: registered new interface driver uas usbcore: registered new interface driver usb-storage i2c_dev: i2c /dev entries driver usbcore: registered new interface driver btusb sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper usbcore: registered new interface driver usbhid usbhid: USB HID core driver NET: Registered PF_PACKET protocol family mmc0 bounce up to 128 segments into one, max segment size 65536 bytes Bluetooth: RFCOMM TTY layer initialized Bluetooth: RFCOMM socket layer initialized Bluetooth: RFCOMM ver 1.11 ARMv7-M VFP coprocessor found VFP: Double precision floating points are supported Loading compiled-in X.509 certificates mmc0: SDHCI controller on 40418000.usdhc [40418000.usdhc] using DMA input: gpio-keys as /devices/platform/gpio-keys/input/input0 cfg80211: Loading compiled-in X.509 certificates for regulatory database cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 cfg80211: failed to load regulatory.db Freeing unused kernel image (initmem) memory: 3556K This architecture does not have kernel memory protection. Run /init as init process [72] Jan 01 00:00:01 Running in background / # mmc0: host does not support reading read-only switch, assuming write-enable mmc0: new high speed SDHC card at address 59b4 mmcblk0: mmc0:59b4 USD 7.39 GiB mmcblk0: p1 Micrel KSZ8081 or KSZ8091 40424000.ethernet-1:02: attached PHY driver (mii_bus:phy_addr=40424000.ethernet-1:02, irq=POLL) fec 40424000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off |
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