标签 a64 下的文章

a64 uboot 代码走读


目录 [隐藏]I. 术语II. 流程III. 日志mmcIV. lcduboot中disp init流程kernel中disp init流程V. emmcboot0ubootkernelVI. Troubleshootingsd 启动并且成功挂载emmc uboot code reviewI. 术语术语描述fdtflattened device treeII. 流程st=>start: main op0=>operation: board_init_f op1=>operation: init_sequence_r op2=>opera...

a64 io 中断初始化失败


a64 gpio interrupt init failed如下pc0,gpio64 设置中断触发边沿失败。~$ tree /sys/class/gpio/gpio64/ ├── active_low ├── device -> ../../../1c20800.pinctrl ├── direction ├── power │   ├── async │   ├── autosuspend_delay_ms │   ├── control │   ├── runtime_active_kids │   ├── runtime_active_time │   ├── runtime...

a64 sdk pack tool


目录 [隐藏]I. boot0II. u-bootIII. sys_configIV. dtsV. boot-resouceVI. bootimg(kernel+ramdisk)VII. rootfs pack tool编译打包相关脚本文件。vim -p build.sh buildroot/scripts/mkcommon.sh buildroot/scripts/mkcmd.sh tools/pack/pack I. boot0拷贝tools/pack/chips/sun50iw1p1/bin/boot0_sdcard_sun50iw1p1.bin到out...

v4l2 driver framework code review


目录 [隐藏]I. 术语解释II. 启动流程III. 驱动框架kernel spaceuserspace v4l2 drvier framework code reviewI. 术语解释术语解释vfevideo front end driverccicamera control interfacecsicamera serial interfaceII. 启动流程$dmesg -T |egrep -i 'vfe|ov5640|v4l|csi|cci'如上启动顺序csi、cci、mipi 等外设初始化;vfe控制 v4l2 启动;vfe在初始化 v4l2-device...