2021-4-13-半潜船杂项笔记-526互联


layout: post
title: 4月份笔记
categories: 日志
tags: 
    - 开发 
    - 日志
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    musicid: '460119352'

USB软重启

拔出设备并执行以下命令

ls /sys/bus/usb/drivers/usb/

接入设备再次执行该命令

记录差异，比如 1-1

之后在不插拔的情况下执行

echo '1-1' | sudo tee /sys/bus/usb/drivers/usb/bind

启用设备；

echo '1-1' | sudo tee /sys/bus/usb/drivers/usb/unbind

禁用设备；

链接：https://www.zhihu.com/question/269627584/answer/358564001

Distclean

不仅有cmake clean的功能

还附加一个git回档的功能，所以平时慎用

用clean即可

vscode配置文件

//setting.json
"background.enabled": true,
"background.useDefault": false,
"background.customImages": [
"file:///C:\\Users\\星星\\Pictures\\87082023_p0.jpg"
],
"background.style": {
"content": "''",
"pointer-events": "none",
"position": "absolute",
"z-index": "99999",
"width": "100%",
"height": "100%",
"background-position": "center",
"background-repeat": "no-repeat",
"background-size": "100%,100%",
"opacity": 0.2
},
"kite.showWelcomeNotificationOnStartup": false,
"commentTranslate.targetLanguage": "zh-CN",
"editor.fontFamily": "Fira Code",
"editor.fontLigatures":true

//tasks.json
            "label": "build",
            "type": "shell",
            "command": "/bin/bash",
            "args": [
                "-c",
                "${command:cmake.tasksBuildCommand} upload"
            ],
            "options": {
                "cwd": "${command:cmake.buildDirectory}"
            },
            "group": "build",
            "problemMatcher": {
                "base": "$gcc",
                "fileLocation": [
                    "relative",
                    "${command:cmake.buildDirectory}"
                ]
            },
            "presentation": {
                "echo": false,
                "showReuseMessage": false,
                "clear": true,
                "panel": "shared",
                "group": "build"
            }
        },
        {
            "label": "nsh",
            "type": "shell",
            "key": "ctrl+shift+n",
            "command": "./Tools/mavlink_shell.py /dev/ttyACM0",
            "problemMatcher": []
        },
        {
            "label": "clean",
            "type": "shell",
            "command": "make clean",
            "problemMatcher": [],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        },
        {
            "label": "ready",
            "type": "shell",
            "command": "/home/seabird/bin/cmake --no-warn-unused-cli -DCONFIG:STRING=px4_fmu-v2_default -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_BUILD_TYPE:STRING=MinSizeRel -DCMAKE_C_COMPILER:FILEPATH=/opt/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc-9.3.1 -H/home/seabird/Project/PX4-Autopilot -B/home/seabird/Project/PX4-Autopilot/build/px4_fmu-v2_default -G Ninja",
            "problemMatcher": [],
            "group": "build",
            "dependsOn": [
                "clean"
            ]
        },

vscode 管道不存在

win10默认openssh废物

改环境变量，删openssh，加git的ssh

移植uart程序

https://blog.csdn.net/oqqENvY12/article/details/57131022

CMakeLists.txt中

DEPENDS 中删去 platforms__common

rw_uart.c中

删去#include <systemlib/systemlib.h>

配置自定义msg文件

添加.msg

然后编译时会在bulid产生对应的.h，此时vscode在引用该信息时会报错但不影响（由于build文件夹默认不检索）

https://blog.csdn.net/Lin_QC/article/details/84550743

其中比较重要的几句

1. # 和 topics 之间有空格   

2. topics 之后的第一个主题必须与 文件名相同

3.timestamp 这个字段必须添加不然之后的make会报错

文件名和内容相同就一样吗

不一定

你的内容的定义必须是完全一致，md5一致

vscode比较就是相同但md5不同

MusicTime绑定错误

https://raw.githubusercontent.com/xutongxin1/PictureBed/master/img0/image-20210425214834036.png

I2C地址获取

for (uint8_t i = 0; i < 255; i++) {
    if(HAL_I2C_IsDeviceReady(&hi2c1,i,1,1000)==HAL_OK)
        printf("OK");
}

如果发现255个地址都没有且发现HAL_I2C_IsDeviceReady都是HAL_Busy，可能是你没共地或者另一种情况

https://electronics.stackexchange.com/questions/272427/stm32-busy-flag-is-set-after-i2c-initialization

RCC时钟信号选择

BYPASS Clock Source（旁路时钟源）---有源
Crystal/Ceramic Resonator（晶体/陶瓷晶振）---无源

定时器中断进不去可能

//HAL_TIM_Base_Start(&htim2);//这个命令不能打开
HAL_TIM_Base_Start_IT(&htim2);//这个必须要有

定时器来计脉冲数

TIM ETR2外部输入

cubemx配置

如果没有计数需要检查是否打开了计数器自动重载，其他都可以不用动

用另一个定时器开1s中断来检查这个值

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
    if (htim == (&htim2))
    {
        a+=htim1.Instance->CNT;
        htim1.Instance->CNT=0;//这种复位是有效的
    }
}