2

回答

当前 本站 问答板块的 兼容性存在bug,个别提的问题在pc环境下就不能进行回答,打不开回答界面啊。比如:https://www.icxbk.com/ask/detail/54045.htmlhttps://www.icxbk.com/ask/detail/54042.html这类问题如何处理?

xdsnet 11:55 阅读:14

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回答

​cs5532内部模拟放大是64倍的,但是还不够大,所以需要用到数字放大,那么芯片内部数字放大效果怎么样,如何使用

yhj416606438 08:21 阅读:14

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回答

有需要的联系我18001818269

xbk_818269 08:09 阅读:12

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回答

伺服电机是怎么精确控制位置的

yhj416606438 08:08 阅读:14

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回答

因为ucos是收费的,我们做的产品是用ucos的,那么形评的时候有没有办法查出芯片是否用了ucos,

yhj416606438 07:53 阅读:14

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回答

如题,能否将一般的实时操作系统也改成类似于Linux实时态和用户态,然后通过中间的Ioctrl来调用?有熟悉嵌入式操作系统的大神试过没?该怎么实现?结合CPU的异常等级(特权)?如何切换硬件层面的CPU的特权等级?

沃尔夫斯堡的羊 00:21 阅读:12

2

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在线电路仿真的网站,有没有

莱克迷KW 2021-03-04 阅读:19

2

回答

三极管与mos哪个干扰小一些

莱克迷KW 2021-03-04 阅读:18

2

回答
JFET与mos有什么区别 电子元器件

JFET与mos有什么区别

莱克迷KW 2021-03-04 阅读:15

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回答

在AM3358平台移植Uboot(ver=U-Boot 2018.07)以太网可以识别但是ping不通: U-Boot 2018.07 (Feb 28 2021 - 18:59:04 -0800) WJP F:arch/arm/mach-omap2/am33xx/sys_info.c,L:130, CPU  : AM335X-GP rev 2.1 Model: TI AM335x EVM-SK DRAM:  256 MiB F:common/board_r.c,L:423,board_init_r start F:common/board_r.c,L:423,board_init_r end WJP F:board/ti/am335x/board.c, L:636, F:board_init, start: WJP F:board/ti/am335x/board.c, L:718, F:board_init, end: F:commooard_r.c,L:403,NAND:  128 MiB F:commooard_r.c,L:423, MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1 Loading Environment from FAT... Unable to use mmc 0:1... Failed (-5) No USB device found <ethaddr> not set. Validating first E-fuse MAC Net:   eth0: ethernet@4a100000 Hit any key to stop autoboot:  0 => setenv ipaddr 172.30.131.12 => setenv serverip 172.30.131.200 => printenv arch=arm args_mmc=run finduuid;setenv bootargs console=${console} ${optargs} root=PARTUUID=${uuid} rw rootfstype=${mmcrootfstype} baudrate=115200 board=am335x boot_a_script=load ${devtype} ${devnum}{distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr} boot_efi_binary=if fdt addr ${fdt_addr_r}; then bootefi bootmgr ${fdt_addr_r};else bootefi bootmgr ${fdtcontroladdr};fi;load ${devtype} ${devnum}{distro_bootpart} ${kernel_addr_r} efi/boot/bootarm.efi; if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r};else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi boot_extlinux=sysboot ${devtype} ${devnum}{distro_bootpart} any ${scriptaddr} ${prefix}extlinux/extlinux.conf boot_fdt=try boot_fit=0 boot_net_usb_start=usb start boot_prefixes=/ /boot/ boot_script_dhcp=boot.scr.uimg boot_scripts=boot.scr.uimg boot.scr boot_targets=mmc0 legacy_mmc0 mmc1 legacy_mmc1 nand0 pxe dhcp bootcmd=if test ${boot_fit} -eq 1; then run update_to_fit; fi; run findfdt; run init_console; run envboot; run distro_bootcmd bootcmd_dhcp=run boot_net_usb_start; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}" -a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXEClient:Arch:00010:UNDI:003000;setenv bootp_arch 0xa;if dhcp ${kernel_addr_r}; then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r}; else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi;fi;setenv bootp_vci ${efi_old_vci};setenv bootp_arch ${efi_old_arch};setenv efi_fdtfile;setenv efi_old_arch;setenv efi_old_vci; bootcmd_legacy_mmc0=setenv mmcdev 0; setenv bootpart 0:2 ; run mmcboot bootcmd_legacy_mmc1=setenv mmcdev 1; setenv bootpart 1:2 ; run mmcboot bootcmd_mmc0=setenv devnum 0; run mmc_boot bootcmd_mmc1=setenv devnum 1; run mmc_boot bootcmd_nand=run nandboot bootcmd_pxe=run boot_net_usb_start; dhcp; if pxe get; then pxe boot; fi bootcount=6 bootdelay=2 bootdir=/boot bootenvfile=uEnv.txt bootfile=zImage bootm_size=0x10000000 bootpart=0:2 bootscript=echo Running bootscript from mmc${mmcdev} ...; source ${loadaddr} console=ttyO0,115200n8 cpu=armv7 dfu_alt_info_emmc=rawemmc raw 0 3751936;boot part 1 1;rootfs part 1 2;MLO fat 1 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x300 0x1000;u-env.raw raw 0x1300 0x200;spl-os-args.raw raw 0x1500 0x200;spl-os-image.raw raw 0x1700 0x6900;spl-os-args fat 1 1;spl-os-image fat 1 1;u-boot.img fat 1 1;uEnv.txt fat 1 1 dfu_alt_info_mmc=boot part 0 1;rootfs part 0 2;MLO fat 0 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x300 0x1000;u-env.raw raw 0x1300 0x200;spl-os-args.raw raw 0x1500 0x200;spl-os-image.raw raw 0x1700 0x6900;spl-os-args fat 0 1;spl-os-image fat 0 1;u-boot.img fat 0 1;uEnv.txt fat 0 1 dfu_alt_info_nand=SPL part 0 1;SPL.backup1 part 0 2;SPL.backup2 part 0 3;SPL.backup3 part 0 4;u-boot part 0 5;u-boot-spl-os part 0 6;kernel part 0 8;rootfs part 0 9 dfu_alt_info_ram=kernel ram 0x80200000 0x4000000;fdt ram 0x80f80000 0x80000;ramdisk ram 0x81000000 0x4000000 distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done efi_dtb_prefixes=/ /dtb/ /dtb/current/ envboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootscript; then run bootscript;else if run loadbootenv; then echo Loaded env from ${bootenvfile};run importbootenv;fi;if test -n $uenvcmd; then echo Running uenvcmd ...;run uenvcmd;fi;fi;fi; eth1addr=90:70:65:db:2a:7e ethact=ethernet@4a100000 ethaddr=90:70:65:db:2a:7c fdt_addr_r=0x88000000 fdtaddr=0x88000000 fdtcontroladdr=8df1e8f0 fdtfile=undefined findfdt=if test $board_name = A335BONE; then setenv fdtfile am335x-bone.dtb; fi; if test $board_name = A335BNLT; then setenv fdtfile am335x-boneblack.dtb; fi; if test $board_name = A335PBGL; then setenv fdtfile am335x-pocketbeagle.dtb; fi; if test $board_name = BBBW; then setenv fdtfile am335x-boneblack-wireless.dtb; fi; if test $board_name = BBG1; then setenv fdtfile am335x-bonegreen.dtb; fi; if test $board_name = BBGW; then setenv fdtfile am335x-bonegreen-wireless.dtb; fi; if test $board_name = BBBL; then setenv fdtfile am335x-boneblue.dtb; fi; if test $board_name = A33515BB; then setenv fdtfile am335x-evm.dtb; fi; if test $board_name = A335X_SK; then setenv fdtfile am335x-evmsk.dtb; fi; if test $board_name = A335_ICE; then setenv fdtfile am335x-icev2.dtb; fi; if test $fdtfile = undefined; then echo WARNING: Could not determine device tree to use; fi; finduuid=part uuid mmc ${bootpart} uuid fit_bootfile=fitImage fit_loadaddr=0x87000000 importbootenv=echo Importing environment from mmc${mmcdev} ...; env import -t ${loadaddr} ${filesize} init_console=if test $board_name = A335_ICE; then setenv console ttyO3,115200n8;else setenv console ttyO0,115200n8;fi; ipaddr=172.30.131.12 kernel_addr_r=0x82000000 load_efi_dtb=load ${devtype} ${devnum}{distro_bootpart} ${fdt_addr_r} ${prefix}${efi_fdtfile} loadaddr=0x82000000 loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenvfile} loadbootscript=load mmc ${mmcdev} ${loadaddr} boot.scr loadfdt=load ${devtype} ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile} loadfit=run args_mmc; bootm ${loadaddr}#${fdtfile}; loadimage=load ${devtype} ${bootpart} ${loadaddr} ${bootdir}/${bootfile} loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi mmcboot=mmc dev ${mmcdev}; setenv devnum ${mmcdev}; setenv devtype mmc; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadimage; then if test ${boot_fit} -eq 1; then run loadfit; else run mmcloados;fi;fi;fi; mmcdev=0 mmcloados=run args_mmc; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdtaddr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi; mmcrootfstype=ext4 rootwait mtdids=nand0=nand.0 mtdparts=mtdparts=nand.0:128k(NAND.SPL),128k(NAND.SPL.backup1),128k(NAND.SPL.backup2),128k(NAND.SPL.backup3),256k(NAND.u-boot-spl-os),1m(NAND.u-boot),128k(NAND.u-boot-env),128k(NAND.u-boot-env.backup1),8m(NAND.kernel),-(NAND.file-system) nandargs=setenv bootargs console=${console} ${optargs} root=${nandroot} rootfstype=${nandrootfstype} nandboot=echo Booting from nand ...; run nandargs; nand read ${fdtaddr} NAND.u-boot-spl-os; nand read ${loadaddr} NAND.kernel; bootz ${loadaddr} - ${fdtaddr} nandroot=ubi0:rootfs rw ubi.mtd=NAND.file-system,2048 nandrootfstype=ubifs rootwait=1 netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}{rootpath},${nfsopts} rw ip=dhcp netboot=echo Booting from network ...; setenv autoload no; dhcp; run netloadimage; run netloadfdt; run netargs; bootz ${loadaddr} - ${fdtaddr} netloadfdt=tftp ${fdtaddr} ${fdtfile} netloadimage=tftp ${loadaddr} ${bootfile} nfsopts=nolock partitions=uuid_disk=${uuid_gpt_disk};name=bootloader,start=384K,size=1792K,uuid=${uuid_gpt_bootloader};name=rootfs,start=2688K,size=-,uuid=${uuid_gpt_rootfs} pxefile_addr_r=0x80100000 ramargs=setenv bootargs console=${console} ${optargs} root=${ramroot} rootfstype=${ramrootfstype} ramboot=echo Booting from ramdisk ...; run ramargs; bootz ${loadaddr} ${rdaddr} ${fdtaddr} ramdisk_addr_r=0x88080000 ramroot=/dev/ram0 rw ramrootfstype=ext2 rdaddr=0x88080000 rootpath=/export/rootfs scan_dev_for_boot=echo Scanning ${devtype} ${devnum}{distro_bootpart}...; for prefix in ${boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_for_efi; scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devplist || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devnum}{distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done scan_dev_for_efi=setenv efi_fdtfile ${fdtfile}; if test -z "${fdtfile}" -a -n "${soc}"; then setenv efi_fdtfile ${soc}-${board}${boardver}.dtb; fi; for prefix in ${efi_dtb_prefixes}; do if test -e ${devtype} ${devnum}{distro_bootpart} ${prefix}${efi_fdtfile}; then run load_efi_dtb; fi;done;if test -e ${devtype} ${devnum}{distro_bootpart} efi/boot/bootarm.efi; then echo Found EFI removable media binary efi/boot/bootarm.efi; run boot_efi_binary; echo EFI LOAD FAILED: continuing...; fi; setenv efi_fdtfile scan_dev_for_extlinux=if test -e ${devtype} ${devnum}{distro_bootpart} ${prefix}extlinux/extlinux.conf; then echo Found ${prefix}extlinux/extlinux.conf; run boot_extlinux; echo SCRIPT FAILED: continuing...; fi scan_dev_for_scripts=for script in ${boot_scripts}; do if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}${script}; then echo Found U-Boot script ${prefix}${script}; run boot_a_script; echo SCRIPT FAILED: continuing...; fi; done scriptaddr=0x80000000 serial#=90:70:65:db:2a:7c serverip=172.30.131.200 soc=am33xx spiargs=setenv bootargs console=${console} ${optargs} root=${spiroot} rootfstype=${spirootfstype} spiboot=echo Booting from spi ...; run spiargs; sf probe ${spibusno}:0; sf read ${loadaddr} ${spisrcaddr} ${spiimgsize}; bootz ${loadaddr} spibusno=0 spiimgsize=0x362000 spiroot=/dev/mtdblock4 rw spirootfstype=jffs2 spisrcaddr=0xe0000 static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:ff stderr=serial@44e09000 stdin=serial@44e09000 stdout=serial@44e09000 update_to_fit=setenv loadaddr ${fit_loadaddr}; setenv bootfile ${fit_bootfile} usb_boot=usb start; if usb dev ${devnum}; then setenv devtype usb; run scan_dev_for_boot_part; fi vendor=ti ver=U-Boot 2018.07 (Feb 28 2021 - 18:59:04 -0800) Environment size: 9886/131068 bytes => ping 172.30.131.200 link up on port 0, speed 100, full duplex Using ethernet@4a100000 device ARP Retry count exceeded; starting again ping failed; host 172.30.131.200 is not alive =>

mingming 2021-03-04 阅读:17

1

回答

STM32实现CDC和MSC的USB复合设备后,FLASH存储到一定数据量后,CDC就不能使用了,flash格式化后,虚拟串口就可以正常通信了,有没有人遇到这种情况?

chunyang 2021-03-04 阅读:13

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回答

就这个显示一个字符的程序,当中chr是字符串的首地址,也就是要显示字符的地址。 第一个问题                   然后chr既然是地址。为什么asc2_2412[chr][t]这样用。  这个chr怎么会是一个整数。 第二个问题                  chr-“ ”    也是很不理解。我知道的是这个asc2_2412[chr][t]数组刚开始是空格的编码。 这整个程序我就这里这一点不理解了,心里特堵得慌。 本人新手,对于很多知识学习不到位,希望各位能伸手帮一下!      void OLED_ShowChar(u8 x,u8 y,u8 chr,u8 size,u8 mode) {                                           u8 temp,t,t1;         u8 y0=y;         u8 csize=(size/8+((size%8)?1:0))*(size/2);                //μ&#195;μ&#189;×&#214;ì&#229;ò&#187;&#184;&#246;×&#214;·&#251;&#182;&#212;ó|μ&#227;&#213;ó&#188;ˉ&#203;ù&#213;&#188;μ&#196;×&#214;&#189;úêy         chr=chr-' ';//μ&#195;μ&#189;&#198;&#171;ò&#198;oóμ&#196;&#214;μ                    就是这一句     for(t=0;t<csize;t++)     {                    if(size==12)temp=asc2_1206[chr][t];                  //μ÷ó&#195;1206×&#214;ì&#229;                 else if(size==16)temp=asc2_1608[chr][t];        //μ÷ó&#195;1608×&#214;ì&#229;                 else if(size==24)temp=asc2_2412[chr][t];        //μ÷ó&#195;2412×&#214;ì&#229;                 else return;                                                                //&#195;&#187;óDμ&#196;×&#214;&#191;a         for(t1=0;t1<8;t1++)                 {                         if(temp&0x80)OLED_DrawPoint(x,y,mode);  //&#187;-μ&#227;oˉêy                         else OLED_DrawPoint(x,y,!mode);                         temp<<=1;                         y++;                         if((y-y0)==size)                         {                                 y=y0;                                 x++;                                 break;                         }                 }                }          }

sjsjling 2021-03-04 阅读:30

1

回答

有哥哥可以介绍下吗

有花堪折 2021-03-04 阅读:13

1

回答

我现在有三个传感器要采集数据,几乎是同时进行的,请问硬件设计是要同时启用三个ADC,还是只选择一个ADC但用其三个通道。目前用的片内ADC,共有三个。谢谢朋友们~~~还有就是区别大不大?

雪狼 2021-03-04 阅读:12

0

回答

can't open /dev/ttyAMA0: No such file or directory 全部是这个打印,网络,nfs服务器一切正常,rcS,权限为777, 没有出现无法挂载nfs 失败的情况,网上基本没有这些信息,怎么实验,都不行,在线等

雪狼 2021-03-04 阅读:13

2

回答

mt9v034的并行数据输出有10位,DOUT2~DOUT9输出8位的像素灰度值,那么DOUT0和DOUT1这另个引脚输出什么信息呢?在官方手册没找到。

liubo 2021-03-04 阅读:13

1

回答

型号:RXEF030 厂牌:LITTELFUSE 规格书有需要直pin脚的Figure 3,型号帮确认是哪个?

匿名用户 2021-03-04 阅读:7

1

回答

型号:V23154-Z1002 厂牌:TE CONNECTIVITY V23154-Z1002 和V23154Z1002的区别

匿名用户 2021-03-04 阅读:8

1

回答

型号:DM13A 厂牌:SITI/台湾点晶科技 请提供一下这个型号的规格书或者封装?

匿名用户 2021-03-04 阅读:8

1

回答

型号:1 厂牌:1 TMS320F28023PTT 技术推荐替代料:TI厂牌 TMS320F28027FPTT : 我看资料中28027F和28027的区别是RAM和ROM的分配有点区别,想问一下,我以前的28027的程序如果用28027F的芯片,不用28027F自带的foc库,是否需要重新分配RAM? : 有一块RAM是FOC专用的,我不用FOC库的话,那部分RAM是否也需要预留出来 客户的问题,可以处理吗

匿名用户 2021-03-04 阅读:8
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