WhyCan Forum(哇酷开发者社区)

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/select.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include "nuc970-etimer.h"

int main(int argc, char **argv){
    int fd_timer;
    int ret,j=0,cnt;
    int ii,jj,kk;
    char *dev = "/dev/etimer0";
    int timeout = 1000;  // base : 1ms 
    fd_timer = open(dev,O_RDWR);
    if(fd_timer < 0)
        printf("open etimer error\n");
    ioctl(fd_timer, ETMR_IOC_CLKHXT, NULL);
    ioctl(fd_timer, ETMR_IOC_PERIODIC, &timeout); 
    for(j=0;j<20;j++){
        read(fd_timer, &cnt, sizeof(cnt));
        printf("startime = %u\n",cnt);
        /*测试运行代码*/
        for(ii=0;ii<100;ii++)    
            for(jj = 0; jj < 200; jj++);            
                
        read(fd_timer, &cnt, sizeof(cnt));
        printf("endtime  = %u\n\n",cnt);
    }
    
    ioctl(fd_timer, ETMR_IOC_STOP, NULL);
    
}

startime = 1
endtime  = 4

startime = 8
endtime  = 12

startime = 15
endtime  = 19

startime = 20
endtime  = 21

startime = 22
endtime  = 23

startime = 24
endtime  = 25

startime = 26
endtime  = 27

startime = 28
endtime  = 29

startime = 30
endtime  = 31

startime = 32
endtime  = 33

startime = 34
endtime  = 35

startime = 36
endtime  = 37

startime = 38
endtime  = 40

startime = 44
endtime  = 48

startime = 49
endtime  = 50

startime = 51
endtime  = 52

startime = 53
endtime  = 54

startime = 55
endtime  = 56

startime = 57
endtime  = 58

startime = 59
endtime  = 60

regulator_init_complete: incomplete constraints, leaving LDO2 on
regulator_init_complete: incomplete constraints, leaving LDO1 on
ata1: SATA link down (SStatus 0 SControl 300)
regulator_init_complete: incomplete constraints, leaving VDCDC3 on
regulator_init_complete: incomplete constraints, leaving VDCDC2 on
regulator_init_complete: incomplete constraints, leaving VDCDC1 on
davinci_emac_probe: using random MAC addr: 5a:60:e9:a5:c5:19
mmc0: new high speed SDHC card at address 0002
mmcblk0: mmc0:0002 SD16G 14.9 GiB 
 mmcblk0:
emac-mii: probed
omap_rtc omap_rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)

RAMDISK: gzip image found at block 0
uncompression error
VFS: Mounted root (ext2 filesystem) on device 1:0.
Freeing init memory: 148K
EXT2-fs (ram0): error: ext2_check_page: bad entry in directory #3841: : rec_len is smaller than minimal - offset=2048, inode=0, rec_len=0, name_len=0
Failed to execute /linuxrc.  Attempting defaults...
Kernel panic - not syncing: No init found.  Try passing init= option to kernel.
Backtrace: 
[<c0031708>] (dump_backtrace+0x0/0x114) from [<c030155c>] (dump_stack+0x18/0x1c)
 r7:00000000 r6:00000000 r5:00000000 r4:c042e310
[<c0301544>] (dump_stack+0x0/0x1c) from [<c03015c4>] (panic+0x64/0x140)
[<c0301560>] (panic+0x0/0x140) from [<c002d628>] (init_post+0x100/0x134)
 r3:c781fedc r2:00000000 r1:c781fedc r0:c0397c1f
[<c002d528>] (init_post+0x0/0x134) from [<c00084e8>] (kernel_init+0x110/0x14c)
 r5:00000000 r4:c042dae0
[<c00083d8>] (kernel_init+0x0/0x14c) from [<c0044c88>] (do_exit+0x0/0x5ec)
 r5:00000000 r4:00000000

SF: Detected W25Q128 with page size 4 KiB, total 16 MiB
## Booting kernel from Legacy Image at 00007fc0 ...
   Image Name:   
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    4080640 Bytes = 3.9 MiB
   Load Address: 00007fc0
   Entry Point:  00008000
   Verifying Checksum ... OK
SF: Detected W25Q128 with page size 4 KiB, total 16 MiB
SF: DeviceBooting Linux on physical CPU 0x0
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Initializing cgroup subsys cpuacct
Linux version 3.10.108 (cookie@NtrGoldWind) (gcc version 4.9.4 (Buildroot 2018.02.8) ) #2 PREEMPT Fri Mar 1 12:45:16 CST 2019
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
CPU: VIVT data cache, VIVT instruction cache
Machine: NUC970
Memory policy: ECC disabled, Data cache writeback
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: noinitrd root=/dev/mtdblock1 rootfstype=jffs2 rootflags=inband-tags console=ttyS0 rdinit=/sbin/init 
PID hash table entries: 256 (order: -2, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 60680k/60680k available, 4856k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    vmalloc : 0xc4800000 - 0xff000000   ( 936 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .text : 0xc0008000 - 0xc0395eec   (3640 kB)
      .init : 0xc0396000 - 0xc03b5740   ( 126 kB)
      .data : 0xc03b6000 - 0xc03ec400   ( 217 kB)
       .bss : 0xc03ec400 - 0xc0421ac4   ( 214 kB)
SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Preemptible hierarchical RCU implementation.
NR_IRQS:625
sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 4294967286ms
Console: colour dummy device 80x30
console [ttyS0] enabled
Calibrating delay loop... 148.88 BogoMIPS (lpj=744448)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
Initializing cgroup subsys devices
Initializing cgroup subsys freezer
Initializing cgroup subsys perf_event
CPU: Testing write buffer coherency: ok
Setting up static identity map for 0xc02d99f0 - 0xc02d9a2c
devtmpfs: initialized
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
NET: Registered protocol family 2
TCP established hash table entries: 512 (order: 0, 4096 bytes)
TCP bind hash table entries: 512 (order: -1, 2048 bytes)
TCP: Hash tables configured (established 512 bind 512)
TCP: reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
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.
NetWinder Floating Point Emulator V0.97 (double precision)
jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 118
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
nuc970-uart.0: ttyS0 at I/O 0x0 (irq = 36) is a NUC970
brd: module loaded
nuc970-spi0 nuc970-spi0: master is unqueued, this is deprecated
m25p80: Enable Dual Read Mode
m25p80 spi0.0: w25q128 (16384 Kbytes)
Creating 2 MTD partitions on "m25p80":
0x000000000000-0x000000800000 : "kernel"
0x000000800000-0x000001000000 : "rootfs"
CAN device driver interface
nuc970-can0 nuc970-can0: nuc970_can0_platform device registered (regs=f800b000, irq=58)
libphy: nuc970_rmii0: probed
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci_nuc970_probe() - name: nuc970-ehci
nuc970-ehci nuc970-ehci: Nuvoton NUC970/N9H30 EHCI Host Controller
nuc970-ehci nuc970-ehci: new USB bus registered, assigned bus number 1
nuc970-ehci nuc970-ehci: irq 23, io mem 0xb0005000
nuc970-ehci nuc970-ehci: USB 2.0 started, EHCI 0.95
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
nuc970-ohci nuc970-ohci: Nuvoton NUC970/N9H30 OHCI Host Controller
nuc970-ohci nuc970-ohci: new USB bus registered, assigned bus number 2
nuc970-ohci nuc970-ohci: irq 24, io mem 0xb0007000
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
usbcore: registered new interface driver usb-storage
cpuidle: using governor ladder
TCP: cubic registered
NET: Registered protocol family 17
can: controller area network core (rev 20120528 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20120528)
can: broadcast manager protocol (rev 20120528 t)
can: netlink gateway (rev 20130117) max_hops=1
List of all partitions:
No filesystem could mount root, tried:  jffs2
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
CPU: 0 PID: 1 Comm: swapper Not tainted 3.10.108 #2
Backtrace: 
[<c001213c>] (dump_backtrace+0x0/0x108) from [<c001234c>] (show_stack+0x18/0x1c)
 r6:00008000 r5:c03b0ef0 r4:c38a5000 r3:00000000
[<c0012334>] (show_stack+0x0/0x1c) from [<c02d6af4>] (dump_stack+0x20/0x28)
[<c02d6ad4>] (dump_stack+0x0/0x28) from [<c02d4aa0>] (panic+0xa0/0x1f4)
[<c02d4a00>] (panic+0x0/0x1f4) from [<c03970c0>] (mount_block_root+0x234/0x27c)
 r3:c3843ea8 r2:00000020 r1:c3843ea8 r0:c034d0d0
 r7:c034d138
[<c0396e8c>] (mount_block_root+0x0/0x27c) from [<c03972f0>] (mount_root+0xec/0x114)
[<c0397204>] (mount_root+0x0/0x114) from [<c0397478>] (prepare_namespace+0x160/0x1c0)
 r8:c03ec400 r7:0000005b r6:c03b0ef0 r5:c03b0ef0 r4:c03ec460
[<c0397318>] (prepare_namespace+0x0/0x1c0) from [<c0396c3c>] (kernel_init_freeable+0x1d8/0x224)
 r6:c03ec400 r5:00000008 r4:c03b5738
[<c0396a64>] (kernel_init_freeable+0x0/0x224) from [<c02d4420>] (kernel_init+0x10/0x158)
[<c02d4410>] (kernel_init+0x0/0x158) from [<c000ee98>] (ret_from_fork+0x14/0x3c)
 r5:c02d4410 r4:00000000

baudrate=115200
bootargs=noinitrd root=/dev/mtdblock1 rootfstype=jffs2 rootflags=inband-tags console=ttyS0 rdinit=/sbin/init 
bootcmd=sf probe 0 240000000; sf read 0x7fc0 0x200000 0x8a0000;bootm 0x7fc0
bootdelay=3
ethact=emac
ethaddr=00:00:00:11:66:88
stderr=serial
stdin=serial
stdout=serial

mkfs.jffs2 -r target -o images/k2rootfs.jffs2 -n -l

 --- >CAN bus subsystem support                                                  
        <*>   Raw CAN Protocol (raw access with CAN-ID filtering)                    
        <*>   Broadcast Manager CAN Protocol (with content filtering)               
        <*>   CAN Gateway/Router (with netlink configuration)                         
              CAN Device Drivers  --->                                               
                      --- NUC970 CAN0/CAN1 devices                                                   
                      [*]   NUC970 CAN0 support                                                    
                      [*]     Enable CAN0 wake-up function                                           
                              NUC970 CAN0 pin selection (Tx:PI4, Rx:PI3)  --->                      
                      [*]   NUC970 CAN1 support                                                     
                      [*]     Enable CAN1 wake-up function                                         
                              NUC970 CAN1 pin selection (Tx:PH15, Rx:PH14)  ---> 

int main(int argc, char **argv)
{
	struct can_frame frame;
	struct can_frame Rx_frame;
	struct ifreq ifr;
	struct sockaddr_can addr;
	
	int family = PF_CAN, type = SOCK_RAW, proto = CAN_RAW;
	int dlc = 8;
	int can0_fd, ret, i, rtr = 0, extended = 0;
	int j;
	int ret1;
	int Rx_cnt = 0;

	can_set_bitrate("can0", 5000);
	can_do_start("can0");
    strcpy(ifr.ifr_name, "can0");
		
	can0_fd = socket(family, type, proto);
	if (can0_fd < 0)
	{
		printf("ERROR");
		return 1;
	}

	addr.can_family = family;

	if (ioctl(can0_fd, SIOCGIFINDEX, &ifr) < 0)
	{
		printf("ERROR");
		return 1;
	}

	addr.can_ifindex = ifr.ifr_ifindex;
	if (bind(can0_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
	{
		printf("ERROR");
		return 1;
	}
		
	
	
	for(i = 0; i < dlc; i++)
	{
		frame.data[i] = Rx_cnt%34 + i;
		Rx_frame.data[i] = 0;
	}

	frame.can_id = 0x100;
	frame.can_dlc = dlc;

	if (extended)
	{
		frame.can_id &= CAN_EFF_MASK;
		frame.can_id |= CAN_EFF_FLAG;
	} 
	else
	{
		frame.can_id &= CAN_SFF_MASK;
	}

	if (rtr)
		frame.can_id |= CAN_RTR_FLAG;
	
	printf("\n CAN0 transfer id: %d", frame.can_id);
	printf("\n CAN0 transfer dlc: %d", frame.can_dlc);
	printf("\n CAN0 transfer Data:\n");
	for (i = 0; i < frame.can_dlc; i++)
		printf(" 0x%02x", frame.data[i]);
	printf("\n");

	ret1 = 0;
	for(;;){
		
		for(i = 0; i < dlc; i++)
		{
			frame.data[i] = Rx_cnt%34 + i;
			Rx_frame.data[i] = 0;
		}

		ret = write(can0_fd, &frame, sizeof(frame));
		if (ret == -1)
		{
			printf("write error !! \n");
		}
		printf("\n CAN0 transfer Data:\t");
		for (i = 0; i < frame.can_dlc; i++)
			printf(" 0x%02x", frame.data[i]);
		Rx_cnt++;
		printf("\t Rx: %d \n", Rx_cnt);
	}
	
	can_do_stop("can0"); 

        
	return 0;
}

~ # ip link set can0 up
nuc970-can0 nuc970-can0 can0: bit-timing not yet defined
nuc970-can0 nuc970-can0 can0: failed to open can device
ip: ioctl 0x8914 failed: Invalid argument

usbcore: registered new interface driver usb-storage
TCP: cubic registered
NET: Registered protocol family 17
can: controller area network core (rev 20120528 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20120528)
can: broadcast manager protocol (rev 20120528 t)
can: netlink gateway (rev 20130117) max_hops=1
[color#ff0000]
nuc970-emac0 nuc970-emac0: eth0 is OPENED
IP-Config: Complete:
     device=eth0, hwaddr=08:00:27:00:01:92, ipaddr=10.0.20.81, mask=255.255.255.0, gw=10.0.20.254
     host=10.0.20.81, domain=, nis-domain=(none)
     bootserver=10.0.20.78, rootserver=10.0.20.78, rootpath=
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
CPU: 0 PID: 1 Comm: swapper Not tainted 3.10.101 #3
[/color]
Backtrace: 
[<c0011f24>] (dump_backtrace+0x0/0x10c) from [<c0012138>] (show_stack+0x18/0x1c)
 r6:c03fd8d0 r5:00008000 r4:c03977a8 r3:00000000
[<c0012120>] (show_stack+0x0/0x1c) from [<c031a1c8>] (dump_stack+0x20/0x28)
[<c031a1a8>] (dump_stack+0x0/0x28) from [<c0317db4>] (panic+0xa4/0x1f8)
[<c0317d10>] (panic+0x0/0x1f8) from [<c03e2054>] (mount_block_root+0x1c4/0x270)
 r3:00000030 r2:00000000 r1:c3843ea0 r0:c03977a8
 r7:c0397810
[<c03e1e90>] (mount_block_root+0x0/0x270) from [<c03e22e8>] (mount_root+0xec/0x114)
[<c03e21fc>] (mount_root+0x0/0x114) from [<c03e2470>] (prepare_namespace+0x160/0x1c0)
 r8:c03fd8a8 r7:c043b5a0 r6:c03fd8d0 r5:c03fd8d0 r4:c043b600
[<c03e2310>] (prepare_namespace+0x0/0x1c0) from [<c03e1c48>] (kernel_init_freeable+0x1d8/0x220)
 r6:c043b5a0 r5:00000007 r4:c0402114
[<c03e1a70>] (kernel_init_freeable+0x0/0x220) from [<c0317710>] (kernel_init+0x10/0x158)
[<c0317700>] (kernel_init+0x0/0x158) from [<c000ecf8>] (ret_from_fork+0x14/0x3c)
 r5:c0317700 r4:00000000

mem=64M console=ttyS0,115200n8 root=/dev/nfs rw rdinit=/sbin/init mtdparts=nand0:16M(boot)ro,-(rootfs) nfsroot=10.0.20.78:/home/cookie/nuc970bsp/rootfs ip=10.0.20.81:10.0.20.78:10.0.20.254:255.255.255.0::eth0:off