I have gotten through the serial port connection of RaspberryPi. Besides, our development board is not
brand new, so the refurbishment is necessary.
Refurbishment of Raspbian
In this section, I will introduce how download operating system image to this board. At the very first, you must prepare Win32DiskImager and a OS image like 2016-02-26-raspbian-jessie-lite.img as I used. Now, insert your SD card to the computer and make sure the lock on SD card is opened.
Open Disk Imager and write image to the board.
Get through the Serial Port
In order to avoid your confusion, the I prefer presenting the connection picture instead of circuit. Of course, you must ensure that your serial port driver work out. You could consult Getting Started with WRTNode on Windows 8.1 for detail.
Open putty and input Serial line and Speed like below image, them click Open.
As you can, we connect succecfully. Besides, your default login name is pi and password is raspberry.
By connection using serial port, you could read the Starting Content. Unfortunately, in my windows 8.1 platform, the bug of serial port driver would lead a crash of system. Thus, I prefer another way to connect Raspberry.
Connection by LAN
By using a cable connecting Raspberry Pi with Router, Raspberry Pi could be visted like a client.
Also, the router device manager would show your IP of Raspberry Pi.
It’s time to login with Putty.
Cross Compiling
PC is better place to develop software, which is the motivation of Cross Compiling. However, windows is not a good place for raspberry development. I couldn’t find cros compiling tools for windows, but for linux.
In Ubuntu 14.04, apt-get is utilized to gain the tools.1
2
3apt-get install gcc-arm-linux-gnueabi make ncurses-dev
arm-linux-gnueabi-gcc hello.c
scp a.out pi@192.168.1.101:~/hello.out
When you compile the file successfully, you could scp the executable to the raspberrypi. And, execute! Then you could see that.1
Hello World!
Starting Content
Uncompressing Linux… done, booting the kernel.
[ 0.000000] Booting Linux on physical CPU 0x0 //Linux would execute from address 0x0
[ 0.000000] Initializing cgroup subsys cpuset //initialize subsystem cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.1.18+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611) ) #846 Thu Feb 25 14:11:56 GMT 2016 //Linux Version
[ 0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7), cr=00c5387d // CPU information
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
[ 0.000000] Machine model: Raspberry Pi Model B Rev 2 // Booting model of raspberry
[ 0.000000] cma: Reserved 8 MiB at 0x1b400000
[ 0.000000] Memory policy: Data cache writeback // cache strategy
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 113680
[ 0.000000] Kernel command line: dma.dmachans=0x7f35 bcm2708_fb.fbwidth=656 bcm2708_fb.fbheight=416 bcm2708.boardrev=0xf bcm2708.serial=0xb633a796 smsc95xx.macaddr=B8:27:EB:33:A7:96 bcm2708_fb.fbswap=1 bcm2708.uart_clock=3000000 vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Memory: 436836K/458752K available (5792K kernel code, 488K rwdata, 1788K rodata, 352K init, 720K bss, 13724K reserved, 8192K cma-reserved)
[ 0.000000] Virtual kernel memory layout: // memory layout
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
[ 0.000000] vmalloc : 0xdc800000 - 0xff000000 ( 552 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xdc000000 ( 448 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc076f1f0 (7581 kB)
[ 0.000000] .init : 0xc0770000 - 0xc07c8000 ( 352 kB)
[ 0.000000] .data : 0xc07c8000 - 0xc0842260 ( 489 kB)
[ 0.000000] .bss : 0xc0842260 - 0xc08f63e0 ( 721 kB)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:522
[ 0.000000] clocksource stc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns
[ 0.000014] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 2147483647500ns
[ 0.000055] Switching to timer-based delay loop, resolution 1000ns
[ 0.000339] Console: colour dummy device 80x30
[ 0.001263] console [tty1] enabled
[ 0.001322] Calibrating delay loop (skipped), value calculated using timer frequency.. 2.00 BogoMIPS (lpj=10000)
[ 0.001407] pid_max: default: 32768 minimum: 301
[ 0.001784] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.001854] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.002904] Initializing cgroup subsys blkio // initialize other sub systems
[ 0.002997] Initializing cgroup subsys memory
[ 0.003068] Initializing cgroup subsys devices
[ 0.003131] Initializing cgroup subsys freezer
[ 0.003191] Initializing cgroup subsys net_cls
[ 0.003309] CPU: Testing write buffer coherency: ok
[ 0.003428] ftrace: allocating 19747 entries in 58 pages
[ 0.107997] Setting up static identity map for 0x81c0 - 0x81f8
[ 0.110174] devtmpfs: initialized
[ 0.120996] VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 5
[ 0.121448] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.123452] pinctrl core: initialized pinctrl subsystem
[ 0.124353] NET: Registered protocol family 16
[ 0.129822] DMA: preallocated 4096 KiB pool for atomic coherent allocations //DMA information
[ 0.131309] bcm2708.uart_clock = 3000000
[ 0.136188] hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
[ 0.136264] hw-breakpoint: maximum watchpoint size is 4 bytes.
[ 0.136469] Serial: AMBA PL011 UART driver
[ 0.136768] 20201000.uart: ttyAMA0 at MMIO 0x20201000 (irq = 83, base_baud = 0) is a PL011 rev2
[ 0.504783] console [ttyAMA0] enabled
[ 0.509180] bcm2835-mbox 2000b880.mailbox: mailbox enabled
[ 0.555152] bcm2708-dmaengine 20007000.dma: DMA legacy API manager at f2007000, dmachans=0xf35
[ 0.563881] bcm2708-dmaengine 20007000.dma: Initialized 7 DMA channels (+ 1 legacy)
[ 0.572447] bcm2708-dmaengine 20007000.dma: Load BCM2835 DMA engine driver
[ 0.579375] bcm2708-dmaengine 20007000.dma: dma_debug:0
[ 0.585524] SCSI subsystem initialized
[ 0.589687] usbcore: registered new interface driver usbfs
[ 0.595405] usbcore: registered new interface driver hub
[ 0.600937] usbcore: registered new device driver usb
[ 0.606962] raspberrypi-firmware soc:firmware: Attached to firmware from 2016-02-25 14:25
[ 0.642645] Switched to clocksource stc
[ 0.695761] FS-Cache: Loaded
[ 0.699061] CacheFiles: Loaded
[ 0.717829] NET: Registered protocol family 2
[ 0.723757] TCP established hash table entries: 4096 (order: 2, 16384 bytes)//initialize TCP
[ 0.730947] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.737578] TCP: Hash tables configured (established 4096 bind 4096)
[ 0.744216] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.750112] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.756799] NET: Registered protocol family 1
[ 0.761767] RPC: Registered named UNIX socket transport module.
[ 0.767822] RPC: Registered udp transport module.
[ 0.772557] RPC: Registered tcp transport module.
[ 0.777323] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.785046] hw perfevents: enabled with armv6_1176 PMU driver, 3 counters available
[ 0.794182] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.816618] VFS: Disk quotas dquot_6.6.0// VFS information
[ 0.820999] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.830680] FS-Cache: Netfs ‘nfs’ registered for caching
[ 0.837438] NFS: Registering the id_resolver key type
[ 0.842616] Key type id_resolver registered
[ 0.846953] Key type id_legacy registered
[ 0.854796] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.862778] io scheduler noop registered
[ 0.866779] io scheduler deadline registered (default)
[ 0.872354] io scheduler cfq registered
[ 0.878777] BCM2708FB: allocated DMA memory 5b800000
[ 0.883951] BCM2708FB: allocated DMA channel 0 @ f2007000
[ 0.894517] Console: switching to colour frame buffer device 82x26
[ 0.905754] Serial: 8250/16550 driver, 0 ports, IRQ sharing disabled
[ 0.915513] vc-cma: Videocore CMA driver
[ 0.921209] vc-cma: vc_cma_base = 0x00000000
[ 0.927667] vc-cma: vc_cma_size = 0x00000000 (0 MiB)
[ 0.934745] vc-cma: vc_cma_initial = 0x00000000 (0 MiB)
[ 0.942041] vc-mem: phys_addr:0x00000000 mem_base=0x1ec00000 mem_size:0x20000000(512 MiB)
[ 0.972531] brd: module loaded
[ 0.986428] loop: module loaded
[ 0.992227] vchiq: vchiq_init_state: slot_zero = 0xdb880000, is_master = 0
[ 1.002848] Loading iSCSI transport class v2.0-870.
[ 1.010911] usbcore: registered new interface driver smsc95xx
[ 1.018561] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 1.226240] Core Release: 2.80a
[ 1.230928] Setting default values for core params
[ 1.237309] Finished setting default values for core params
[ 1.444723] Using Buffer DMA mode
[ 1.449623] Periodic Transfer Interrupt Enhancement - disabled
[ 1.457074] Multiprocessor Interrupt Enhancement - disabled
[ 1.464295] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 1.470287] Dedicated Tx FIFOs mode
[ 1.475872] WARN::dwc_otg_hcd_init:1047: FIQ DMA bounce buffers: virt = 0xdb814000 dma = 0x5b814000 len=9024
[ 1.489017] FIQ FSM acceleration enabled for :
[ 1.489017] Non-periodic Split Transactions
[ 1.489017] Periodic Split Transactions
[ 1.489017] High-Speed Isochronous Endpoints
[ 1.512339] WARN::hcd_init_fiq:412: FIQ on core 0 at 0xc03dd6ac
[ 1.519921] WARN::hcd_init_fiq:413: FIQ ASM at 0xc03dd988 length 36
[ 1.527836] WARN::hcd_init_fiq:438: MPHI regs_base at 0xdc896000
[ 1.535562] dwc_otg 20980000.usb: DWC OTG Controller
[ 1.542176] dwc_otg 20980000.usb: new USB bus registered, assigned bus number 1
[ 1.551213] dwc_otg 20980000.usb: irq 32, io mem 0x00000000
[ 1.558460] Init: Port Power? op_state=1
[ 1.563985] Init: Power Port (0)
[ 1.569081] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.577540] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.586401] usb usb1: Product: DWC OTG Controller
[ 1.592717] usb usb1: Manufacturer: Linux 4.1.18+ dwc_otg_hcd
[ 1.600031] usb usb1: SerialNumber: 20980000.usb
[ 1.607263] hub 1-0:1.0: USB hub found
[ 1.612757] hub 1-0:1.0: 1 port detected
[ 1.619430] usbcore: registered new interface driver usb-storage
[ 1.627539] mousedev: PS/2 mouse device common for all mice
[ 1.635776] bcm2835-cpufreq: min=700000 max=700000
[ 1.642517] sdhci: Secure Digital Host Controller Interface driver
[ 1.650338] sdhci: Copyright(c) Pierre Ossman
[ 1.656701] sdhost: log_buf @ db813000 (5b813000)
[ 1.742719] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[ 1.750373] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.778602] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.786572] hidraw: raw HID events driver (C) Jiri Kosina
[ 1.793960] usbcore: registered new interface driver usbhid
[ 1.801132] usbhid: USB HID core driver
[ 1.811110] Initializing XFRM netlink socket
[ 1.817278] Indeed it is in host mode hprt0 = 00021501
[ 1.884554] NET: Registered protocol family 17
[ 1.890968] Key type dns_resolver registered
[ 1.904841] registered taskstats version 1
[ 1.910951] vc-sm: Videocore shared memory driver
[ 1.917563] [vc_sm_connected_init]: start
[ 1.924665] [vc_sm_connected_init]: end - returning 0
[ 1.933842] Waiting for root device /dev/mmcblk0p2…
[ 1.950344] mmc0: host does not support reading read-only switch, assuming write-enable
[ 1.963583] mmc0: new high speed SDHC card at address b368
[ 1.971566] mmcblk0: mmc0:b368 SDC 7.51 GiB
[ 1.980155] mmcblk0: p1 p2
[ 2.052765] usb 1-1: new high-speed USB device number 2 using dwc_otg
[ 2.061925] Indeed it is in host mode hprt0 = 00001101
[ 2.130259] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 2.141890] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[ 2.159602] devtmpfs: mounted
[ 2.165579] Freeing unused kernel memory: 352K (c0770000 - c07c8000)
[ 2.283253] usb 1-1: New USB device found, idVendor=0424, idProduct=9512
[ 2.292007] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.302876] hub 1-1:1.0: USB hub found
[ 2.309261] hub 1-1:1.0: 3 ports detected
[ 2.564499] random: systemd urandom read with 61 bits of entropy available
[ 2.579766] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR)
[ 2.597128] usb 1-1.1: new high-speed USB device number 3 using dwc_otg // USB information
[ 2.606478] systemd[1]: Detected architecture ‘arm’.
[ 2.713310] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00
[ 2.722251] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.748879] NET: Registered protocol family 10
[ 2.758094] systemd[1]: Inserted module ‘ipv6’
[ 2.765114] smsc95xx v1.0.4
[ 2.777284] systemd[1]: Set hostname to
[ 2.831806] smsc95xx 1-1.1:1.0 eth0: register ‘smsc95xx’ at usb-20980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:33:a7:96
[ 2.921707] uart-pl011 20201000.uart: no DMA platform data
[ 3.510755] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory.
[ 3.537318] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
[ 3.549967] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ 3.561823] systemd[1]: Expecting device dev-ttyAMA0.device…
[ 3.572924] systemd[1]: Starting Remote File Systems (Pre).
[ 3.583543] systemd[1]: Reached target Remote File Systems (Pre).
[ 3.592030] systemd[1]: Starting Encrypted Volumes.
[ 3.601895] systemd[1]: Reached target Encrypted Volumes.
[ 3.609815] systemd[1]: Starting Arbitrary Executable File Formats File System Automount Point.
[ 3.626548] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[ 3.640487] systemd[1]: Starting Swap.
[ 3.649274] systemd[1]: Reached target Swap.
[ 3.655869] systemd[1]: Expecting device dev-mmcblk0p1.device…
[ 3.666639] systemd[1]: Starting Root Slice.
[ 3.675708] systemd[1]: Created slice Root Slice.
[ 3.682457] systemd[1]: Starting User and Session Slice.
[ 3.692893] systemd[1]: Created slice User and Session Slice.
[ 3.700698] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[ 3.712171] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ 3.721334] systemd[1]: Starting Delayed Shutdown Socket.
[ 3.731613] systemd[1]: Listening on Delayed Shutdown Socket.
[ 3.739521] systemd[1]: Starting Journal Socket (/dev/log).
[ 3.749939] systemd[1]: Listening on Journal Socket (/dev/log).
[ 3.758004] systemd[1]: Starting udev Control Socket.
[ 3.767775] systemd[1]: Listening on udev Control Socket.
[ 3.775334] systemd[1]: Starting udev Kernel Socket.
[ 3.784937] systemd[1]: Listening on udev Kernel Socket.
[ 3.792291] systemd[1]: Starting Journal Socket.
[ 3.801797] systemd[1]: Listening on Journal Socket.
[ 3.809032] systemd[1]: Starting System Slice.
[ 3.818276] systemd[1]: Created slice System Slice.
[ 3.825377] systemd[1]: Starting File System Check on Root Device…
[ 3.840897] systemd[1]: Starting system-systemd\x2dfsck.slice.
[ 3.861987] systemd[1]: Created slice system-systemd\x2dfsck.slice.
[ 3.873883] systemd[1]: Starting system-getty.slice.
[ 3.894040] systemd[1]: Created slice system-getty.slice.
[ 3.903948] systemd[1]: Starting system-serial\x2dgetty.slice.
[ 3.916204] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 3.925608] systemd[1]: Starting Increase datagram queue length…
[ 3.951212] systemd[1]: Starting Restore / save the current clock…
[ 3.988340] systemd[1]: Starting udev Coldplug all Devices…
[ 4.061012] systemd[1]: Started Set Up Additional Binary Formats.
[ 4.116562] systemd[1]: Starting Load Kernel Modules…
[ 4.188874] systemd[1]: Mounting POSIX Message Queue File System…
[ 4.295465] systemd[1]: Mounting Debug File System…
[ 4.320276] systemd[1]: Mounted Huge Pages File System.
[ 4.343804] systemd[1]: Starting Create list of required static device nodes for the current kernel…
[ 4.364861] systemd[1]: Starting Slices.
[ 4.381353] systemd[1]: Reached target Slices.
[ 4.397220] systemd[1]: Started Increase datagram queue length.
[ 4.704288] systemd[1]: Started File System Check on Root Device.
[ 4.733046] systemd[1]: Started Restore / save the current clock.
[ 4.766911] systemd[1]: Started Load Kernel Modules.
[ 4.793010] systemd[1]: Mounted POSIX Message Queue File System.
[ 4.815336] systemd[1]: Mounted Debug File System.
[ 4.842933] systemd[1]: Started Create list of required static device nodes for the current kernel.
[ 4.881438] systemd[1]: Time has been changed
[ 4.939493] systemd[1]: Started udev Coldplug all Devices.
[ 5.196823] systemd[1]: Starting Create Static Device Nodes in /dev…
[ 5.214792] systemd[1]: Mounting Configuration File System…
[ 5.244766] systemd[1]: Starting Apply Kernel Variables…
[ 5.309277] systemd[1]: Mounted FUSE Control File System.
[ 5.339617] systemd[1]: Starting Syslog Socket.
[ 5.380159] systemd[1]: Listening on Syslog Socket.
Raspbian GNU/Linux 8 raspberrypi ttyAMA0