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(dd if=/dev/mtd0; dd if=/dev/mtd1; dd if=/dev/mtd2; dd if=/dev/mtd3; dd if=/dev/mtd4; dd if=/dev/mtd5) > /mnt/sd/hisi_flash.bin

(dd if=/dev/mtd0; dd if=/dev/mtd1; dd if=/dev/mtd2) > /mnt/sd/hisi_flash.bin

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下载源代码
wget https://www.eecis.udel.edu/\~ntp/ntp_spool//ntp4/ntp-4.2/ntp-4.2.8p15.tar.gz

配置静态编译
./configure –prefix=/media/server_disk/nfs/ntp/output –host=arm-linux-gnueabi CC=arm-himix200-linux-gcc –enable-static –with-yielding-select=no –with-openssl-incdir=/home/leon/Workspace/opensshd/output/include/openssl –with-openssl-libdir=/home/leon/Workspace/opensshd/output/lib

make

make install

在output/bin文件夹找到ntpdate文件，拷贝到目标板，

首先确定目标板可正常联网，比如ping baidu.com可以ping通，然后

执行：ntpdate stdtime.gov.hk
或者：ntpdate time.nist.gov
成功获取时间
Dec 02:14:43 ntpdate[910]: adjust time server 223.255.185.2 offset -0.001138 sec
使用date命令检查系统时间，发现时区不对

从别的机器上拷贝/usr/localtime 文件到目标板
再运行 date -R查看：
Thu, 03 Dec 2020 10:34:48 +0800

大功造成

cc = arm-himix200-linux-gcc
prom = psdk_com
deps = $(shell find ./ -name “*.h”)
src = $(shell find ./ -name “*.c”)
obj = $(src:%.c=%.o)

root_dir = $(shell pwd)

ccflags = -lpthread -I$(root_dir)

$(prom): $(obj)
$(cc) $(ccflags) -o $(prom) $(obj)

%.o: %.c $(deps)
$(cc) $(ccflags) -c $< -o $@ clean: rm -rf $(obj) $(prom)

所有数据以小端模式传输，字符串为UTF8编码

服务端：
安装
sudo apt-get install nfs-kernel-server # 安装 NFS服务器端
sudo apt-get install nfs-common # 安装 NFS客户端

修改
sudo vim /etc/exports
如下：
/media/server_disk/nfs *(rw,sync,no_root_squash,no_subtree_check)

客户端：
mount -t nfs 192.168.8.200:/media/server_disk/nfs /mnt/nfs

由于ubuntu上mount -tcifs 必须使用sudo，挂载后目录属于root，其他用户无写入权限
可以挂载指定用户来解决：
sudo mount -t cifs //192.168.8.200/OfficeServer ./OfficeServer -o username=leon,password=123456,uid=1000,gid=1000

参考：https://blog.csdn.net/sbddbfm/article/details/100883650
SDK默认只打开了uart0，但我实际上要用三个串口。
ls /dev/ttyAMA*可以看到：
/dev/ttyAMA0 /dev/ttyAMA1
看实际只有ttyAMA0可以用，也就是上电默认的终端
使用echo测试：
~ # echo 123 > /dev/ttyAMA0
123

~ # echo 123 > /dev/ttyAMA1
can not create file:/dev/ttyAMA1

首先看内核配置文件arch/arm/boot/dts/hi3516ev300.dtsi：
uart0: uart@12040000 {
compatible = “arm,pl011”, “arm,primecell”;
reg = <0x12040000 0x1000>;
interrupts = <0 7 4>;
clocks = <&clock HI3516EV300_UART0_CLK>;
clock-names = “apb_pclk”;
status = “disabled”;
};

uart1: uart@12041000 {
compatible = “arm,pl011”, “arm,primecell”;
reg = <0x12041000 0x1000>;
interrupts = <0 8 4>;
clocks = <&clock HI3516EV300_UART1_CLK>;
clock-names = “apb_pclk”;
status = “disabled”;
};

uart2: uart@12042000 {
compatible = “arm,pl011”, “arm,primecell”;
reg = <0x12042000 0x1000>;
interrupts = <0 9 4>;
clocks = <&clock HI3516EV300_UART2_CLK>;
clock-names = “apb_pclk”;
status = “disabled”;
};
可见是有个串口的，但都是disable的状态，其实起作用的是另一个文件： arch/arm/boot/dts/hi3516ev300-demb.dts：
&uart0 {
status = “okay”;
};
所以再copy两份就可以了，在下面添加：
&uart1 {
status = “okay”;
};
&uart2 {
status = “okay”;
};
重新编译内核，下载到目标板，启动后ls /dev/ttyAMA*可以看到：
/dev/ttyAMA0 /dev/ttyAMA1 /dev/ttyAMA2
echo测试都可以成功，但与实际串口相连的设备没有收到数据，查资料得知，还得配置引脚复用寄存器。

使用hisi工具btools，具体使用方法可参考另一文章：

我的板子串口发送接在E1脚
查文档如下：

默认值为0x1E00，应该修改为0x1E04
使用himd.l读取寄存器的值：
~ # himd.l 0x120C0014
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:168}cmdstr:himd.l
====dump memory 0x120C0014====
0000: 00001e00 00001d00 00001400 00001d00
0010: 00000000 00000000 00000000 00000000
0020: 00000000 00000000 00000000 00000000
0030: 00000000 00000000 00000000 00000000
0040: 00000000 00000000 00000000 00000000
0050: 00000000 00000000 00000000 00000000
0060: 00000000 00000000 00000000 00000000
0070: 00000000 00000000 00000000 00000000
0080: 00000000 00000000 00000000 00000000
0090: 00000000 00000000 00000000 00000000
00a0: 00000000 00000000 00000000 00000000
00b0: 00000000 00000000 00000000 00000000
00c0: 00000000 00000000 00000000 00000000
00d0: 00000000 00000000 00000000 00000000
00e0: 00000000 00000000 00000000 00000000
00f0: 00000000 00000000 00000000 00000000
[END]
寄存器的值还是默认值，修改它：
~ # himm 0x120C0014 0x00001e04
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:168}cmdstr:himm
0x120C0014: 0x00001E00 –> 0x00001E04
[END]

再次echo测试：
~ # echo 123 > /dev/ttyAMA2
不成功，为什么呢？收发接反了！！！再次尝试，乱码，波特率不对，初始波特率是9600

1、编译
进入Hi3516EV200_SDK_V1.0.0.2/osdrv/tools/board/reg-tools-1.0.0
修改Makefile中的目标芯片的目标编译器，我的是3516EV300，对应编译器是himix200
ifndef CHIP
CHIP = hi3516ev300
endif

ifndef OSDRV_CROSS
OSDRV_CROSS ?= arm-himix200-linux
endif
保存直接make即可在bin文件夹下生成btools文件和几个软件连接
2、拷贝
把生成的btools文件拷贝到目标板，我放在sbin目录下了
3、软连接
以下是手工生成，太笨了，搞完才发现，可以自动
~ # ln -s /sbin/btools /sbin/himc
~ # ln -s /sbin/btools /sbin/himd
~ # ln -s /sbin/btools /sbin/himd.l
~ # ln -s /sbin/btools /sbin/himm
~ # ln -s /sbin/btools /sbin/hivd
~ # ln -s /sbin/btools /sbin/himdb
~ # ln -s /sbin/btools /sbin/hiddrs
~ # ln -s /sbin/btools /sbin/i2c_read
~ # ln -s /sbin/btools /sbin/i2c_write
~ # ln -s /sbin/btools /sbin/ssp_read
~ # ln -s /sbin/btools /sbin/ssp_write
自动生成命令：
进入/sbin目录，执行：btools -i
4、使用
himc : memory clear
himd : memory display (8bit)
himd.l : memory display (32bit)
himm : memory modify
hivd : video dump
himdb : video dump
hiddrs : ddr statistic
i2c_read : i2c device read
i2c_write : i2c device read
ssp_read : ssp device read
ssp_write : ssp device read

以下是修改E1引脚的复用功能为UART2_TXD
himd.l 0x120C0014
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:168}cmdstr:himd.l
====dump memory 0x120C0014====
0000: 00001e00 00001d00 00001400 00001d00
0010: 00000000 00000000 00000000 00000000
0020: 00000000 00000000 00000000 00000000
0030: 00000000 00000000 00000000 00000000
0040: 00000000 00000000 00000000 00000000
0050: 00000000 00000000 00000000 00000000
0060: 00000000 00000000 00000000 00000000
0070: 00000000 00000000 00000000 00000000
0080: 00000000 00000000 00000000 00000000
0090: 00000000 00000000 00000000 00000000
00a0: 00000000 00000000 00000000 00000000
00b0: 00000000 00000000 00000000 00000000
00c0: 00000000 00000000 00000000 00000000
00d0: 00000000 00000000 00000000 00000000
00e0: 00000000 00000000 00000000 00000000
00f0: 00000000 00000000 00000000 00000000
[END]

himm 0x120C0014 0x00001e04
*** Board tools : ver0.0.1_20121120 ***
[debug]: {source/utils/cmdshell.c:168}cmdstr:himm
0x120C0014: 0x00001E00 –> 0x00001E04
[END]

单独编译U-boot
注意：发布包默认按照DMEB板的配置发布，如果客户单板和DEMB板不一致，需要根据客户自己的单板环境修改uboot表格才能使用，否则可能导致uboot无法启动或者其他问题。

待进入boot源代码目录后，执行以下操作
make ARCH=arm CROSS_COMPILE=arm-himix100-linux- hi3516ev300_defconfig
(emmc启动时执行如下操作：make ARCH=arm CROSS_COMPILE=arm-himix200-linux- hi3516ev300_emmc_defconfig)

make ARCH=arm CROSS_COMPILE=arm-himix100-linux- -j 20

make -C ../../../tools/pc/hi_gzip

cp ../../../tools/pc/hi_gzip/bin/gzip arch/arm/cpu/armv7/hi3516ev200/hw_compressed/ -rf

Windowns下进入到osdrv/tools/pc/uboot_tools/目录下打开对应单板的Excel文件,在main标签中点击”Generate reg bin file”按钮,生成reg_info.bin即为对应平台的表格文件。
从osdrv/tools/pc/uboot_tools目录拷贝reg_info.bin到boot源代码目录,重命名为.reg
cp ../../../tools/pc/uboot_tools/reg_info.bin .reg

make ARCH=arm CROSS_COMPILE=arm-himix200-linux- u-boot-z.bin

opensource/uboot/u-boot-2016.11下生成的u-boot-hi3516ev300.bin即为可用的u-boot镜像

单独编译内核

本文档简要说明将内核的补丁打到v4.9.37的linux kernel上。

1、从linux开源社区下载v4.9.37版本的内核：
1)进入网站：www.kernel.org
2)选择HTTP协议资源的https://www.kernel.org/pub/选项,进入子页面
3)选择linux/菜单项，进入子页面
4)选择kernel/菜单项，进入子页面
5)选择v4.x/菜单项，进入子页面
6)下载linux-4.9.37.tar.gz（或linux-4.9.37.tar.xz）

2、打补丁
1)将下载的 linux-4.9.37.tar.gz 存放到 osdrv的opensource/kernel目录中
2)在linux服务器中进入 osdrv 的根目录,执行如下命令：
cd opensource/kernel
tar -zxf linux-4.9.37.tar.gz
mv linux-4.9.37 linux-4.9.y
cd linux-4.9.y
patch -p1 < ../linux-4.9.37.patch cd ../ tar -czf linux-4.9.y.tgz linux-4.9.y cd ../../ 注意： 若下载的内核格式为linux-4.9.37.tar.xz， 第一步先用： xz -d linux-4.9.37.tar.xz 命令将linux-4.9.37.tar.xz解压为linux-4.9.37.tar。 第二步再用： tar -xvf linux-4.9.37.tar 解压linux-4.9.37.tar。 进入内核根目录 编译： 步骤 1. 手动拷贝.config 文件: cp arch/arm/configs/hi3516ev300_xxx_defconfig .config 步骤 2. 用户通过“make menuconfig” 进行内核配置： make ARCH=arm CROSS_COMPILE=arm-himix200-linux- menuconfig 步骤 3. 选择需要的模块。 步骤 4. 选择完毕后，保存并退出。 步骤 5. 编译内核，生成uImage镜像 make ARCH=arm CROSS_COMPILE=arm-himix200-linux- uImage -j20 此命令可能需要几分钟时间，编译完成，生成文件：arch/arm/boot/uImage，此文件可以烧写到目标板内核分区加载执行

linux下，文件有写权限却不能删除，可能是因为对文件的父目录没有写权限，因为目录是一种特殊的文件，它里面保存着目录下的文件列表，删除其下的文件，需要修改目录里面保存的信息。“一切皆文件”的思想又一次得到体现。