mirror of
https://github.com/54shady/kernel_drivers_examples.git
synced 2026-01-13 16:02:37 +00:00
874 lines
20 KiB
Markdown
874 lines
20 KiB
Markdown
# Firefly_RK3399
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## 编译脚本参考gen_star
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[RK3399编译脚本](https://github.com/54shady/gen_star/tree/rk3399)
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## 驱动开发
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[代码编译方法(具体可参考Makefile中的注释)](https://github.com/54shady/kernel_drivers_examples)
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[FIQ-Debugger](./debug/fiq_debugger)
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[GPIO驱动调试](./debug/gpio)
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[看门狗驱动调试](./debug/wdog)
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[SPI驱动开发](./debug/spi)
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[USB驱动和应用开发](./debug/usb)
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[UART驱动开发](./debug/uart)
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[I2C驱动开发](./debug/i2c)
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[Regmap 驱动实例](./debug/regmap)
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[SD/MMC](./debug/mmc)
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[字符设备驱动](./debug/char)
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[GPIO操作实例](./debug/platform_driver_test)
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[DVFS User Guide](./debug/misc)
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[LCD驱动调试](./lcd.md)
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## 应用开发
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[LCD应用编程](./apps)
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## Uboot中驱动开发
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[GPIO驱动](./uboot)
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## 烧写
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### 分区和对应文件
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Linux系统
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|分区编号|分区名|镜像文件名|
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|--|--|--
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|mmcblk1p1|uboot|uboot.img
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|mmcblk1p2|trust|trust.img
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|mmcblk1p3|boot|linux_boot.img
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|mmcblk1p4|backup|
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|mmcblk1p5|linuxroot|linuxroot.img
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parameter里分区如下
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mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00010000@0x00006000(boot),0x00002000@0x00016000(backup),-@0x00018000(linuxroot)
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Android系统
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|分区编号|分区名|镜像文件名|
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|--|--|--
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|mmcblk1p1|uboot|uboot.img
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|mmcblk1p2|trust|trust.img
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|mmcblk1p3|misc|misc.img
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|mmcblk1p4|resource|resource.img
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|mmcblk1p5|kernel|kernel.img
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|mmcblk1p6|boot|boot.img
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|mmcblk1p7|recovery|recovery.img
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|mmcblk1p8|backup|
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|mmcblk1p9|cache|
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|mmcblk1p10|system|system.img
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|mmcblk1p11|metadata|
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|mmcblk1p12|baseparamer|
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|mmcblk1p13|userdata|
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parameter里分区如下
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mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00002000@0x00006000(misc),0x00008000@0x00008000(resource),0x0000A000@0x00010000(kernel),0x00010000@0x0001A000(boot),0x00010000@0x0002A000(recovery),0x00038000@0x0003A000(backup),0x00040000@0x00072000(cache),0x00200000@0x000B2000(system),0x00008000@0x002B2000(metadata),0x00002000@0x002BA000(baseparamer),-@0x002BC000(userdata)
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### 使用upgrade_tool烧写
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upgrade_tool ul RK3399MiniLoaderAll_V1.05.bin
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upgrade_tool di uboot uboot.img
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upgrade_tool di trust trust.img
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upgrade_tool rd
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### 使用rkflashtool烧写(nsector = 512byte)
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[rkflashtool for rk3399下载地址](https://github.com/54shady/rkflashtool)
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参考rkflashtool帮助
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读出misc分区(假设起始地址为0x6000)前48K的内容
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rkflashtool r 0x6000 96 > misc.img
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## GPIO类型
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如何确定开发板上调试串口电平是3.0v还是1.8v的
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硬件原理图连接如下
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TX和RX是从主控AJ4,AK2连出来的
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AJ4和AK2所在的电源域(GPIO类型)为APIO4
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APIO4电源域如下图(可以根据硬件电路来配置是1.8v/3.0v)
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电源设置1.8v模式硬件电路
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电源设置3.0v模式硬件电路
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查看开发板原理图如下(所以是3.0v)
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## LED使用
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Firefly-RK3399开发板上有2个LED灯,如下表所示
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|LED|GPIO|PIN NUMBER|
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|---|---|---
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|Blue|GPIO2_D3|91
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|Yellow|GPIO0_B5|13
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### 以设备(LED子系统)的方式控制LED
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echo 0 > /sys/class/leds/firefly:blue:power/brightness
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echo 1 > /sys/class/leds/firefly:blue:power/brightness
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### 使用trigger方式控制LED(参考leds-class.txt)
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首先在DT里将两个LED描述如下
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```c
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leds {
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compatible = "gpio-leds";
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power {
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label = "firefly:blue:power";
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linux,default-trigger = "ir-power-click";
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default-state = "on";
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gpios = <&gpio2 D3 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&led_power>;
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};
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user {
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label = "firefly:yellow:user";
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linux,default-trigger = "ir-user-click";
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default-state = "off";
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gpios = <&gpio0 B5 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&led_user>;
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};
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};
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```
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#### Simple trigger LED
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1. 定义LED触发器
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DEFINE_LED_TRIGGER(ledtrig_default_control);
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2. 注册该触发器
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led_trigger_register_simple("ir-user-click", &ledtrig_default_control);
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3. 控制LED的亮
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led_trigger_event(ledtrig_default_control, LED_FULL);
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#### Complex trigger LED
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查看都支持那些trigger
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cat /sys/class/leds/firefly\:blue\:power/trigger
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使用某个trigger触发
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echo "timer" > /sys/class/leds/firefly\:blue\:power/trigger
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## GPIO使用(以GPIO0_B4为例)
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DT里描述GPIO0_B4如下
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配置管脚MUX为GPIO模式(默认是GPIO模式,这里是为了读者更明白原理)
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```c
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gpio_demo_pin: gpio_demo_pin {
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rockchip,pins = <GPIO0_B4 RK_FUNC_GPIO &pcfg_pull_none>;
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};
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```
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以GPIO的模式使用该PIN脚
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```c
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gpio_demo: gpio_demo {
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status = "okay";
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compatible = "firefly,rk3399-gpio";
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firefly-gpio = <&gpio0 B4 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&gpio_demo_pin>;
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};
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```
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### IO-Domain
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在复杂的片上系统(SOC)中,设计者一般会将系统的供电分为多个独立的block,这称作电源域(Power Domain),这样做有很多好处,例如:
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- 在IO-Domain的DTS节点统一配置电压域,不需要每个驱动都去配置一次,便于管理
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- 依照的是Upstream的做法,以后如果需要Upstream比较方便
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- IO-Domain的驱动支持运行过程中动态调整电压域,例如PMIC的某个Regulator可以1.8v和3.3v的动态切换,一旦Regulator电压发生改变,会通知IO-Domain驱动去重新设置电压域
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### 使用工具IO来调试
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查看GPIO1_B3引脚的复用情况
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1. 从主控的datasheet查到GPIO1对应寄存器基地址为:0xff320000
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2. 从主控的datasheet查到GPIO1B_IOMUX的偏移量为:0x00014
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3. GPIO1_B3的iomux寄存器地址为:基址(Operational Base) + 偏移量(offset)=0xff320000+0x00014=0xff320014
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4. 用以下指令查看GPIO1_B3的复用情况:
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io -4 -r 0xff320014
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ff320014: 0000816a
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5. 如果想复用为GPIO,可以使用以下指令设置
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io -4 -w 0xff320014 0x0000812a
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## 使用Linaro编译器编译(android和linux都验证通过)
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[gcc-linaro-4.9.4-2017.01-i686_aarch64-linux-gnu.tar.xz下载地址](http://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/aarch64-linux-gnu/)
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修改对应的gen脚本里的LOCAL_CROSS_COMPILE为指定的编译器即可
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### 编译u-boot
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烧写u-boot
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upgrade_tool di uboot uboot.img
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upgrade_tool di trust trust.img
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upgrade_tool ul RK3399MiniLoaderAll_V1.05.bin
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进入uboot后查看是否是新编译器编译的,执行下面命令
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version
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结果中能看到如下信息
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U-Boot 2014.10-RK3399-10 (Mar 30 2017 - 00:42:40)
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aarch64-linux-gnu-gcc (Linaro GCC 4.9-2017.01) 4.9.4
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GNU ld (Linaro_Binutils-2017.01) 2.24.0.20141017 Linaro 2014_11-3-git
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### 编译kernel
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烧写kernel
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upgrade_tool di -k kernel.img
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upgrade_tool di resource resource.img
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查编译内核的编译器版本
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cat /proc/version
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结果中能看到如下信息
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Linux version 4.4.16 (gcc version 4.9.4 (Linaro GCC 4.9-2017.01) )
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### 编译ramdisk(busybox-1.22.0)
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修改busybox源码中的xconnect.c解决ping bad addr bug
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[参考文章](http://hankjin.blog.163.com/blog/static/337319372009327101324432/)
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设置交叉编译工具和安装路径等(参考rk3399_busybox_defconfig)
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Build BusyBox as a static binary (no shared libs)
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可以在.config中直接设置
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CONFIG_PREFIX="/home/zeroway/rk3399/bsp/ramdiskfs"
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CONFIG_CROSS_COMPILER_PREFIX="/home/zeroway/rk3399/tool/gcc-linaro-4.9.4-2017.01-i686_aarch64-linux-gnu/bin/aarch64-linux-gnu-"
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编译安装
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make
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make install
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经过上一步已经将busybox安装到ramdiskfs文件夹中,有如下内容(linuxrc是指向busybox的链接)
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bin linuxrc sbin usr
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继续在ramdiskfs目录中创建必要的目录结构
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mkdir var tmp sys root proc opt mnt lib home etc dev
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再在etc下创建一个init.d的目录用于保存一些初始化的脚本
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mkdir etc/init.d
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touch etc/init.d/rcS
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rcS脚本如下
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mount -a
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mkdir /dev/pts
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mount -t devpts devpts /dev/pts
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echo /sbin/mdev > /proc/sys/kernel/hotplug
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/sbin/mdev -s
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给rcS脚本添加可执行权限
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chmod +x etc/init.d/rcS
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创建sysconfig
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mkdir etc/sysconfig
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echo "rk3399" > etc/sysconfig/HOSTNAME
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添加/etc/fstab内容如下
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proc /proc proc defaults 0 0
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tmpfs /tmp tmpfs defaults 0 0
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sysfs /sys sysfs defaults 0 0
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tmpfs /dev tmpfs defaults 0 0
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添加必要的设备节点
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sudo mknod dev/console c 5 1
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sudo mknod dev/null c 1 3
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添加/etc/inittab内容如下
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::sysinit:/etc/init.d/rcS
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console::askfirst:-/bin/sh
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::ctrlaltdel:/sbin/reboot
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::shutdown:/bin/umount -a -r
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添加/etc/profile内容如下
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ulimit -S -c 0 > /dev/null 2>&1
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USER="`id -un`"
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LOGNAME=$USER
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PS1='[\u@\h \W]\# '
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PATH=$PATH:/usr/local/bin
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HOSTNAME=`/bin/hostname`
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export USER LOGNAME PS1 PATH
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添加/etc/passwd内容如下
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root:x:0:0:root:/:/bin/sh
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ftp::14:50:FTP User:/var/ftp:
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bin:*:1:1:bin:/bin:
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daemon:*:2:2:daemon:/sbin:
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nobody:*:99:99:Nobody:/:
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添加/etc/group内容如下
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root:*:0:
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daemon:*:1:
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bin:*:2:
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sys:*:3:
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adm:*:4:
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tty:*:5:
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disk:*:6:
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lp:*:7:lp
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mail:*:8:
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news:*:9:
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uucp:*:10:
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proxy:*:13:
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kmem:*:15:
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dialout:*:20:
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fax:*:21:
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voice:*:22:
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cdrom:*:24:
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floppy:*:25:
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tape:*:26:
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sudo:*:27:
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audio:*:29:
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ppp:x:99:
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修改[cmdline](./cmdline_android)参数如下(主要修改init=/linuxrc)
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CMDLINE: androidboot.baseband=N/A androidboot.selinux=disabled androidboot.hardware=rk30board androidboot.console=ttyFIQ0 init=/linuxrc mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00002000@0x00006000(misc),0x00008000@0x00008000(resource),0x0000A000@0x00010000(kernel),0x00010000@0x0001A000(boot),0x00010000@0x0002A000(recovery),0x00038000@0x0003A000(backup),0x00040000@0x00072000(cache),0x00200000@0x000B2000(system),0x00008000@0x002B2000(metadata),0x00002000@0x002BA000(baseparamer),-@0x002BC000(userdata)
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制作一个大小位8M的ext2格式镜像文件,并挂载到/mnt/initrd目录下
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拷贝ramdiskfs里所有文件到/mnt/initrd下
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dd if=/dev/zero of=initrd.img bs=1k count=8192
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sudo mkfs.ext2 -F initrd.img
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sudo mkdir /mnt/initrd
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sudo mount -t ext2 -o loop initrd.img /mnt/initrd
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sudo cp -rfvd ramdiskfs/* /mnt/initrd
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sudo umount /mnt/initrd
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gzip --best -c initrd.img > ramdisk.img
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sudo chmod 777 ramdisk.img
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使用RK提供的打包工具将ramdisk打包成boot
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rkst/mkkrnlimg ramdisk.img boot.img
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烧写ramdisk镜像
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rkflashtool w boot < boot.img
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上网设置(配置网卡,设置域名服务和默认网关)
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ifconfig eth0 192.168.1.234 up
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echo "nameserver 192.168.1.1" > /etc/resolv.conf
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route add default gw 192.168.1.1
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## linux_boot.img制作
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编译内核得到Image和resource.img
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ramdisk镜像制作
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git clone https://github.com/54shady/firefly_rk3399_ramdisk
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cd firefly_rk3399_ramdisk
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find . | cpio -o -H newc | gzip > ../ramdisk.cpio.gz
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打包成linux_boot.img
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mkbootimg --kernel Image --ramdisk ramdisk_linux.cpio.gz --second resource.img -o linux_boot.img
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## Linux发行版根文件系统制作
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### Gentoo根文件系统制作(在PC主机上操作)
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[参考文章Crossdev qemu-static-user-chroot](https://wiki.gentoo.org/wiki/Crossdev_qemu-static-user-chroot)
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[参考文章Gentoo Arm in a QEmu Chroot](https://cqlug.linux.org.au//node/19)
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[下载QEMU user mode emulation binaries](https://launchpad.net/ubuntu/trusty/+package/qemu-user-static)
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[下载stage3-arm64-arm64-20170223.tar.bz2](http://gentoo.osuosl.org/experimental/arm/arm64/)
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#### 准备stage3
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解压stage3到本地目录temp
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mkdir temp
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sudo tar jxvf stage3-arm64-arm64-20170223.tar.bz2 -C temp
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#### Qemu for chroot(gentoo user only)
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安装alien
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emerge alien
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解压deb,得到qemu-user-static-2.0.0~rc1+dfsg.tgz
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alien -t qemu-user-static_2.0.0~rc1+dfsg-0ubuntu3_amd64.deb
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解压qemu-user-static-2.0.0~rc1+dfsg.tgz得到qemu-aarch64-static
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sudo cp qemu-aarch64-static /usr/bin/qemu-aarch64
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sudo cp /usr/bin/qemu-aarch64 temp/usb/bin/qemu-aarch64
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|
||
安装app-emulation/qemu-user为了获得脚本(用的是overlay安装)
|
||
|
||
emerge app-emulation/qemu-user
|
||
|
||
执行脚本(确保aarch64的执行正确, /usr/bin/qemu-arm如果存在会导致失败,删除即可)
|
||
|
||
sudo /etc/init.d/qemu-binfmt start
|
||
|
||
到这里就可以执行chroot了
|
||
|
||
sudo chroot temp
|
||
|
||
#### 基本配置
|
||
|
||
拷贝DNS信息
|
||
|
||
cp -L /etc/resolv.conf temp/etc/
|
||
|
||
#### 制作文件系统
|
||
|
||
[可以完全参考mygentoo,此处不详细描述](https://github.com/54shady/mygentoo)
|
||
|
||
挂载必要目录
|
||
|
||
mount -t proc proc temp/proc
|
||
mount --rbind /sys temp/sys
|
||
mount --make-rslave temp/sys
|
||
mount --rbind /dev temp/dev
|
||
mount --make-rslave temp/dev
|
||
|
||
chroot temp
|
||
|
||
### Ubuntu根文件系统制作(在PC主机上操作)
|
||
|
||
#### 准备ubuntu base
|
||
|
||
解压ubuntu core到本地目录temp
|
||
|
||
mkdir temp
|
||
sudo tar xzvf ubuntu-base-16.04.1-base-arm64.tar.gz -C temp
|
||
|
||
#### 基本配置
|
||
|
||
拷贝DNS信息
|
||
|
||
cp -L /etc/resolv.conf temp/etc/resolv.conf
|
||
|
||
Qemu static user
|
||
|
||
sudo cp /usr/bin/qemu-aarch64 temp/usr/bin/
|
||
|
||
到这里就可以执行chroot了
|
||
|
||
sudo chroot temp
|
||
|
||
设置主机名(不设置sudo会有问题)
|
||
|
||
echo"rk3399" > /etc/hostname
|
||
|
||
设置主机入口IP(hosts中要包含hostname)
|
||
|
||
echo "127.0.0.1 localhost" >> /etc/hosts
|
||
echo "127.0.1.1 rk3399" >> /etc/hosts
|
||
|
||
#### 制作文件系统
|
||
|
||
进入根文件系统进行操作
|
||
|
||
sudo chroot temp
|
||
|
||
更新及安装必要软件
|
||
|
||
apt update
|
||
apt-get install console-setup iputils-ping sudo vim net-tools
|
||
ssh software-properties-common
|
||
|
||
其中console-setup encoding选的是utf-8(该软件不安装串口无法输入)
|
||
这里并不需要/etc/init/目录下有类似ttyFIQ0.conf的文件
|
||
|
||
添加用户
|
||
|
||
useradd -s '/bin/bash' -m -G adm,sudo zeroway
|
||
|
||
给用户设置密码
|
||
|
||
passwd zeroway
|
||
|
||
修改/etc/sudoers
|
||
|
||
zeroway ALL=(ALL:ALL) ALL
|
||
|
||
设置分区信息(/etc/fstab,推荐这种方法)
|
||
|
||
/dev/mmcblk0p5 / ext4 defaults,noatime,errors=remount-ro 0 1
|
||
|
||
或者用下面这种
|
||
|
||
ln -fs /proc/self/mounts /etc/mtab
|
||
|
||
#### ubuntu 应用
|
||
|
||
安装aria2
|
||
|
||
add-apt-repository ppa:t-tujikawa/ppa
|
||
apt-get update
|
||
apt-get install aria2
|
||
|
||
### ubuntu上触摸屏校准(touch calibrator)
|
||
|
||
[参考文章:i.MX6UL图形界面，触屏校准](https://blog.csdn.net/sements/article/details/88108040)
|
||
|
||
安装校准工具包(用来进行触屏校准数据获取)
|
||
|
||
sudo apt install xinput-calibrator
|
||
|
||
查看/usr/share/X11/xorg.conf.d/目录下是否有40-libinput.conf这个文件
|
||
|
||
没有这个文件,则需要安装xserver-xorg-input-libinput
|
||
|
||
sudo apt-get install xserver-xorg-input-libinput
|
||
|
||
复制该文件到/etc/X11/xorg.conf.d/目录下(/etc/X11可能没有,需要自己创建)
|
||
|
||
sudo cp /usr/share/X11/xorg.conf.d/40-libinput.conf /etc/X11/xorg.conf.d/
|
||
|
||
进入/etc/X11/xorg.conf.d/目录下修改40-libinput.conf文件,找到touchscreen section
|
||
|
||
在Identifier下添加一行 Option "CalibrationMatrix" "校准矩阵数据"
|
||
|
||
这里"校准矩阵数据",需要根据实际情况进行校准矩阵的编写,[可以参考这个链接libinput](https://wayland.freedesktop.org/libinput/doc/latest/absolute-axes.html)
|
||
|
||
下面是我手里板的内容(没有填写校准矩阵数据)
|
||
|
||
Section "InputClass"
|
||
Identifier "libinput touchscreen catchall"
|
||
Option "CalibrationMatrix"
|
||
MatchIsTouchscreen "on"
|
||
MatchDevicePath "/dev/input/event*"
|
||
Driver "libinput"
|
||
EndSection
|
||
|
||
重启开发板后触摸校准即生效
|
||
|
||
### Arch根文件系统制作(在PC主机上操作)
|
||
|
||
[下载ArchLinuxARM-aarch64-latest.tar.gz](http://sg.mirror.archlinuxarm.org/os/ArchLinuxARM-aarch64-latest.tar.gz)
|
||
|
||
解压到本地
|
||
|
||
mkdir temp
|
||
sudo tar xzvf ArchLinuxARM-aarch64-latest.tar.gz -C temp/
|
||
|
||
Qemu static user
|
||
|
||
sudo cp /usr/bin/qemu-aarch64 temp/usr/bin/
|
||
|
||
到这里就可以执行chroot了
|
||
|
||
sudo chroot temp
|
||
|
||
设置用户和密码
|
||
|
||
useradd -m -s /bin/bash zeroway
|
||
passwd zeroway
|
||
|
||
设置主机名
|
||
|
||
echo"rk3399" > /etc/hostname
|
||
|
||
修改支持开发板默认串口
|
||
|
||
cp /lib/systemd/system/serial-getty\@.service /lib/systemd/system/serial-getty@ttyFIQ0.service
|
||
|
||
把里面的"%i.device"改为"%i"
|
||
|
||
设置开机启动服务
|
||
|
||
systemctl enable serial-getty@ttyFIQ0.service
|
||
|
||
修改源(/etc/pacman.d/mirrorlist)
|
||
|
||
Server = http://mirrors.ustc.edu.cn/archlinuxarm/$arch/$repo
|
||
Server = http://mirrors.tuna.tsinghua.edu.cn/archlinuxarm/$arch/$repo
|
||
Server = http://mirrors.stuhome.net/archlinuxarm/$arch/$repo
|
||
|
||
设置到这里就可以制作成镜像烧写,烧写开机后切换到root用户,默认root密码为root
|
||
|
||
#### 安装桌面
|
||
|
||
更新软件源
|
||
|
||
pacman -Syu
|
||
|
||
更新pacman key
|
||
|
||
pacman-key --init
|
||
pacman-key --populate
|
||
|
||
安装X Window
|
||
|
||
pacman -S xorg-server
|
||
pacman -S xorg-twm xorg-xclock xterm
|
||
pacman -S xorg
|
||
pacman -S xorg-xinit
|
||
|
||
测试是否安装成功
|
||
|
||
startx
|
||
|
||
安装slim(Display Manager)
|
||
|
||
pacman -S slim
|
||
|
||
开机启动slim(systemd)
|
||
|
||
systemctl enable slim.service
|
||
|
||
其中DM的配置文件是(/etc/slim.conf)有如下内容
|
||
|
||
login_cmd exec /bin/bash -login ~/.xinitrc %session
|
||
|
||
所以创建(~/.xinitrc)其内容如下(比如启动i3wm)
|
||
|
||
#!/bin/sh
|
||
exec i3
|
||
|
||
添加执行权限给.xinitrc
|
||
|
||
chmod +x ~/.xinitrc
|
||
|
||
安装xfce4(Window Manager)
|
||
|
||
pacman -S xfce4
|
||
|
||
测试是否安装成功
|
||
|
||
startxfce4
|
||
|
||
#### wifi使用
|
||
|
||
拷贝下面的固件到/lib/firmware目录下
|
||
|
||
fw_bcm4356a2_ag.bin
|
||
nvram_ap6356s.txt
|
||
|
||
使用ssid和密码生成配置文件
|
||
|
||
wpa_passphrase yourssid yourpassphrase > /etc/wpa_supplicant.conf
|
||
|
||
在配置文件最顶部添加下面内容
|
||
|
||
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
|
||
|
||
确保有相应的目录
|
||
|
||
mkdir -p /var/run/wpa_supplicant
|
||
|
||
启动wpa_supplicant
|
||
|
||
wpa_supplicant -B -Dnl80211 -i wlan0 -c /etc/wpa_supplicant.conf
|
||
|
||
使用DHCP获得IP地址后即可上网
|
||
|
||
dhcpcd wlan0
|
||
|
||
## 将根文件系统制作成镜像
|
||
|
||
这里制作一个8G的ext4格式的镜像文件
|
||
|
||
dd if=/dev/zero of=linuxroot.img bs=1M count=8192
|
||
sudo mkfs.ext4 linuxroot.img
|
||
mkdir rootfs
|
||
sudo mount linuxroot.img rootfs/
|
||
sudo cp -rfp temp/* rootfs/
|
||
sudo umount rootfs/
|
||
e2fsck -p -f linuxroot.img
|
||
resize2fs -M linuxroot.img
|
||
|
||
烧写制作好的文件系统镜像
|
||
|
||
rkflashtool w linuxroot < linuxroot.img
|
||
|
||
开机进入系统在系统正确加载后执行扩展文件系统命令(这里的mmcblk1p5对应的linuxroot分区)
|
||
|
||
resize2fs /dev/mmcblk1p5
|
||
|
||
## 解包和打包
|
||
|
||
[rk3399 ramdisk下载地址](https://github.com/54shady/firefly_rk3399_ramdisk)
|
||
|
||
[参考文章android boot.img unpack pack](http://www.cnblogs.com/helloworldtoyou/p/6473661.html)
|
||
|
||
[参考文章Boot.img tools unpack, repack, ramdisk](https://forum.xda-developers.com/showthread.php?t=2319018)
|
||
|
||
工具源码下载
|
||
|
||
git clone https://github.com/neo-technologies/rockchip-mkbootimg.git
|
||
cd rockchip-mkbootimg
|
||
make
|
||
|
||
打包boot
|
||
|
||
mkbootimg --kernel Image --ramdisk ramdisk_linux.cpio.gz --second resource.img -o linux_boot.img
|
||
|
||
解包boot
|
||
|
||
unmkbootimg -i linux_boot.img
|
||
|
||
解包ramdisk到当前目录
|
||
|
||
gzip -d ramdisk_linux.cpio.gz
|
||
cpio -idmv < ramdisk_linux.cpio
|
||
|
||
打包当前目录到ramdisk.cpio.gz
|
||
|
||
find . | cpio -o -H newc | gzip > ../ramdisk.cpio.gz
|
||
|
||
## Misc
|
||
|
||
### pincontrl,gpio修改
|
||
|
||
DT里rockchip,pins描述(写的不易读,使用下面提供的脚本批量修改)
|
||
|
||
rockchip,pins = <4 17 RK_FUNC_3 &pcfg_pull_none>
|
||
4 GPIO bank号,从1开始
|
||
17 GPIO offset,从0开始(A0-A7,B0-B7,C0-C7)
|
||
RK_FUNC_3 GPIO mux功能
|
||
pcfg_pull_none GPIO是否上下拉,高阻配置
|
||
|
||
- 使用脚本replace_gpio.sh修改DT里的GPIO使代码可读性更强(修改OFFSET为宏)
|
||
|
||
```shell
|
||
GPIO_OFFSET=(
|
||
A0 A1 A2 A3 A4 A5 A6 A7
|
||
B0 B1 B2 B3 B4 B5 B6 B7
|
||
C0 C1 C2 C3 C4 C5 C6 C7
|
||
D0 D1 D2 D3 D4 D5 D6 D7)
|
||
|
||
for (( offset = 31; offset >= 0; offset-- ))
|
||
do
|
||
sed -i "/&gpio/s/\ $offset/\ ${GPIO_OFFSET[offset]}/g" $1
|
||
done
|
||
```
|
||
|
||
代码修改前
|
||
|
||
gpio = <&gpio1 0 GPIO_ACTIVE_HIGH>;
|
||
|
||
代码修改后
|
||
|
||
gpio = <&gpio1 A0 GPIO_ACTIVE_HIGH>;
|
||
|
||
|
||
- 使用脚本replace_pin.sh修改DT里的PIN使代码可读性更强(修改该为BANK_OFFSET宏)
|
||
|
||
```shell
|
||
GPIO_OFFSET=(
|
||
A0 A1 A2 A3 A4 A5 A6 A7
|
||
B0 B1 B2 B3 B4 B5 B6 B7
|
||
C0 C1 C2 C3 C4 C5 C6 C7
|
||
D0 D1 D2 D3 D4 D5 D6 D7)
|
||
|
||
for (( offset = 31; offset >= 0; offset-- ))
|
||
do
|
||
for (( bank = 4; bank >= 0; bank-- ))
|
||
do
|
||
sed -i "/RK_FUNC_/s/<$bank $offset/<GPIO${bank}_${GPIO_OFFSET[offset]}/g" $1
|
||
done
|
||
done
|
||
```
|
||
|
||
代码修改前
|
||
|
||
rockchip,pins = <4 24 RK_FUNC_1 &pcfg_pull_none>;
|
||
|
||
代码修改后
|
||
|
||
rockchip,pins = <GPIO4_D0 RK_FUNC_1 &pcfg_pull_none>;
|
||
|
||
### 使用7yuv显示fb里的图像
|
||
|
||
抓取fb里的图像数据
|
||
|
||
echo bmp > /sys/class/graphics/fb0/dump_buf
|
||
|
||
会在/data/dmp_buf/里保存图片数据,假设名为frame0_win0_0_1920x1080_XBGR888.bin
|
||
|
||
或者直接拷贝fb里的数据
|
||
|
||
cp /dev/graphics/fb0 current_fb_datas
|
||
|
||
使用7yuv设置好分辨率1920x1080和格式RGBA888就能显示该图片
|
||
|
||
### 编译时出现"缺少libtinfo.so.5解决办法"
|
||
|
||
ln -s /lib/libncurses.so.5 /lib/libtinfo.so.5
|
||
|
||
## 新版本BSP
|
||
|
||
[http://opensource.rock-chips.com](./bsp/README.md)
|