<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/mrlixirong</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; mrlixirong]]></copyright><item><title><![CDATA[整流和肖特基二极管价格多少钱？]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/147290087</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/147290087</guid><author>mrlixirong</author><pubDate>Thu, 17 Apr 2025 01:44:55 +0800</pubDate><description><![CDATA[整流和肖特基二极管价格多少钱？从几分到几角不等。封装、电流、耐压、结电容、寿命、形态、品牌、采购量都是常见因素。]]></description><category></category></item><item><title><![CDATA[bat批处理运行cmd命令执行java -jar程序关闭cmd dos窗口]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/146134577</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/146134577</guid><author>mrlixirong</author><pubDate>Sun, 09 Mar 2025 16:46:02 +0800</pubDate><description><![CDATA[如原本的bat指令为：java -jar a.jar，但是dos窗口会保留在任务栏，如何关闭呢？即bat内容变更为“start javaw -jar a.jar”，OK，搞定！1）java变更为javaw。2）前面增加start。]]></description><category></category></item><item><title><![CDATA[电容价格多少钱？]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/145435354</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/145435354</guid><author>mrlixirong</author><pubDate>Tue, 04 Feb 2025 01:48:40 +0800</pubDate><description><![CDATA[电容价格多少钱？小型贴片电容几厘至几分钱，电解电容几毛钱。封装、容量、耐压、等效阻抗、寿命、形态、品牌、采购量都是常见因素。]]></description><category></category></item><item><title><![CDATA[电阻价格多少钱？]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/145292818</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/145292818</guid><author>mrlixirong</author><pubDate>Wed, 22 Jan 2025 00:29:40 +0800</pubDate><description><![CDATA[电阻价格多少钱？小型贴片电阻几厘钱，大型高精密采样电阻几百元。封装、精度、品牌、采购量都是常见因素。]]></description><category></category></item><item><title><![CDATA[GD32F30x的PB3和PB4异常，实际上需要配置remap]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/136940716</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/136940716</guid><author>mrlixirong</author><pubDate>Fri, 22 Mar 2024 14:47:50 +0800</pubDate><description><![CDATA[/config需要AF时钟。如下图2（GD32F30x用户手册截图）所示，当JTAG-DP功能被禁止时，PB3和PB4才能作GPIO用。如下图1（GD32F30x数据手册截图）所示，PB3默认是JTDO，PB4默认是NJTRST。所以，要使用PB3和PB4，需要先禁止JTAG-DP。]]></description><category></category></item><item><title><![CDATA[STM32之串口中断接收UART_Start_Receive_IT]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/136588753</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/136588753</guid><author>mrlixirong</author><pubDate>Sat, 09 Mar 2024 18:57:12 +0800</pubDate><description><![CDATA[在stm32g0xx_it.c文件中，找到了USART2_IRQHandler()函数，特意测试了一下HAL_UART_IRQHandler()其。网上搜索了好多，都是说主函数增加UART_Receive_IT()函数来着，实际正确的是UART_Start_Receive_IT()函数。STM32G030F6的主频设置为64MHz。Cube版本：STM32CubeMX 6.8.1版本。参考芯片：STM32G030F6P6。参考时间：2024年3月9日。调试人员：李工喜荣，LXR。说实话，不是很喜欢HAL。]]></description><category></category></item><item><title><![CDATA[关于液晶显示LCD、TFT、IPS、VA、TN、HTN、STN、FSTN、DSTN、CSTN、VATN（BTN）]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/134158453</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/134158453</guid><author>mrlixirong</author><pubDate>Wed, 01 Nov 2023 12:01:54 +0800</pubDate><description><![CDATA[关于液晶显示LCD、TFT、IPS、VA、TN、HTN、STN、FSTN、DSTN、CSTN、VATN（BTN）]]></description><category></category></item><item><title><![CDATA[GD32F4系列外部晶振启动异常问题解析]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/133918992</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/133918992</guid><author>mrlixirong</author><pubDate>Thu, 19 Oct 2023 09:24:23 +0800</pubDate><description><![CDATA[6）试一下匹配电容，从8.2pF——22pF（标称负载电容式12.5pF），都换过，NG。当时正巧试产设备和一批研发样机，都出现了这个问题，于是赶紧反馈给双边供应商，寻求帮助。OK，LXTAL正常启动，示波器检测有波形，但是还是有些故障。最后发现，去纽扣电池，掉电再上电，重新烧写程序，一切OK。重新领取库存全新物料，焊接到NG的板子上，也还是NG。5）对调MCU，OK的板NG了，NG的板依然NG。3）对调电容，OK的还是OK，NG的还是NG。4）对调晶振，OK的还是OK，NG的还是NG。]]></description><category></category></item><item><title><![CDATA[STM32F0 HAL库TIM16 PWM控制无效]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/131808728</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/131808728</guid><author>mrlixirong</author><pubDate>Wed, 19 Jul 2023 14:48:32 +0800</pubDate><description><![CDATA[正确函数  HAL_TIMEx_PWMN_Start(&htim16, TIM_CHANNEL_1);上面一个函数是通用定时器的启动函数，TIM16属于高级（带死区参数配置）定时器，得用下面的函数。错误函数  HAL_TIM_PWM_Start(&htim16,TIM_CHANNEL_1);弄了很久，发现函数用错了。]]></description><category></category></item><item><title><![CDATA[linux ubuntu挂载ntfs硬盘只读问题]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/129312438</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/129312438</guid><author>mrlixirong</author><pubDate>Fri, 03 Mar 2023 06:43:04 +0800</pubDate><description><![CDATA[原本是windows下的移动硬盘，ntfs格式，挂载到linux ubuntu系统下，共享硬盘，发现只读。可以通过ntfsfix指令修复。]]></description><category></category></item><item><title><![CDATA[Linux ubuntu20.04 磁盘挂载]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/129312401</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/129312401</guid><author>mrlixirong</author><pubDate>Fri, 03 Mar 2023 05:53:26 +0800</pubDate><description><![CDATA[获取磁盘的UUID，创建文件夹，关联映射]]></description><category></category></item><item><title><![CDATA[pyaudio声卡信息中hostApi是什么意思？]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/129186453</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/129186453</guid><author>mrlixirong</author><pubDate>Thu, 23 Feb 2023 17:46:42 +0800</pubDate><description><![CDATA[hostApi是声卡驱动协议，声卡驱动模式，有如下很多类。MME，ASIO，DirectSound和WDM]]></description><category></category></item><item><title><![CDATA[linux局域网文件共享之samba]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/128928799</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/128928799</guid><author>mrlixirong</author><pubDate>Wed, 08 Feb 2023 07:08:59 +0800</pubDate><description><![CDATA[linux局域网文件共享之samba安装、配置、用户名与密码、启动服务]]></description><category></category></item><item><title><![CDATA[图解Base64]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/127112826</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/127112826</guid><author>mrlixirong</author><pubDate>Thu, 29 Sep 2022 20:26:48 +0800</pubDate><description><![CDATA[Base64的由来、编码、变种介绍]]></description><category></category></item><item><title><![CDATA[while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){}卡死]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/126293097</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/126293097</guid><author>mrlixirong</author><pubDate>Thu, 11 Aug 2022 20:59:04 +0800</pubDate><description><![CDATA[while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){}卡死
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) != SET){}卡死]]></description><category></category></item><item><title><![CDATA[STM32有关I2S录音有噪声噼里啪啦及其他应用注意PCM1808]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/125321997</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/125321997</guid><author>mrlixirong</author><pubDate>Thu, 16 Jun 2022 19:38:23 +0800</pubDate><description><![CDATA[1、用PCM1808录音，只用右声道录音，24位左对齐，调了很久，都有噪声，噼里啪啦响，特别大，以为时钟不对，软件配置不对。调了很久，结果发现是左声道用了一个电阻接地，影响到右声道了。正确方法是悬空。2、常用声音采样率是44100、48000、96000，如果你用8M的晶振，不管怎么配置都有误差。解决方案就是换晶振，11.0592MHz，22.1184MHz。...]]></description><category></category></item><item><title><![CDATA[关于WCH沁恒以太网透传芯片CH9121的波特率问题]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/124842764</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/124842764</guid><author>mrlixirong</author><pubDate>Wed, 18 May 2022 15:54:51 +0800</pubDate><description><![CDATA[最近在做一个项目，计划用CH9121做音频传输，音频采样率是48KHz，每帧数据是16位，串口设置8N1，一个字节相当于10bps，然后48K*2*10=960000&gt;921600，咋怎？退而求次，采用44.1K的采样率，可行。

1、关于波特率的误差

CH9121的数据手册没有明显告知921600时的波特率误差，我在用单片机调试时，配置了单片机波特率也是921600，但是中间通讯数据错误很多。后来想，波特率的的产生机制都是一样，无非就是系统频率和某个寄存器值的商，误差是因为和主频不是整数关系。那我]]></description><category></category></item><item><title><![CDATA[STM32F030系列 HAL库FLASH读写（当EEPROM用）]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/124787282</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/124787282</guid><author>mrlixirong</author><pubDate>Sun, 15 May 2022 20:56:09 +0800</pubDate><description><![CDATA[此处已STM32F030F4P6为例，HAL库版本为Keil.STM32F0xx_DFP.2.1.1

1、解锁：程序下载后，默认Flash空间是保护的，所以要先进行解锁。大家都知道，解锁就是对FLASH_KEYR寄存器写两次数据，第一次是0x45670123，第二次是0xCDEF89AB，对应有现成的HAL库函数直接使用，HAL_FLASH_Unlock()。

2、擦除：关于Flash闪存的电气特性：flash编程原理只能将1写成0，不能将0写成1，等同于按位与的关系。比如经过擦除后的存储状态是0xFF]]></description><category></category></item><item><title><![CDATA[运行python程序时nohup.out更新不及时]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/121691289</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/121691289</guid><author>mrlixirong</author><pubDate>Fri, 03 Dec 2021 09:21:44 +0800</pubDate><description><![CDATA[执行 nohup python3.x abc.py &amp;

原以为python的日志都能及时输出到nohup.out日志里，结果发现几十分钟都没更新，以为程序挂了。



好久才知道，python的print是有缓存机制的，要想直接立即输出，则带上-u 参数即可，如下：

nohup python3.x -u abc.py &amp;
...]]></description><category></category></item><item><title><![CDATA[Java 录音与文件保存]]></title><link>https://blog.youkuaiyun.com/mrlixirong/article/details/120407764</link><guid>https://blog.youkuaiyun.com/mrlixirong/article/details/120407764</guid><author>mrlixirong</author><pubDate>Fri, 03 Dec 2021 09:17:32 +0800</pubDate><description><![CDATA[package cn.lixirong.audiotest;

import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Mixer;

public class AudioTest {

	public static void main(String[] args) {

		Mixer.Info[] info= AudioSystem.getMixerInfo();
		for(int i=0;i&lt;info.length.]]></description><category></category></item></channel></rss>