26 Matching Annotations
- Mar 2024
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Local file Local file设计方案模板1
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在实现该接口时有线形态设备应在获取合法 IP 地址前阻塞该接口
wifi 也应该阻塞一段时间吧?
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Local file Local file
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Layers 1 to 4 not defined)
应用协议
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oss.komect.com oss.komect.com
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若是 TRSSI 阈值范围内的设备,智能组网终端则下发入网信息(热点信息中 password 采用 AES-128 进行加密),通知设备连接工作热点;若不是 TRSSI 阈值范围内的设备,或智能组网终端获取信号强度阈值异常,则不下发入网信息
借助已经配网的设备配网,ap配网
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自有生态设备
相当于有一个网关做代理,终端设备没有注册、上线流程
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- Feb 2024
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stackoverflow.com stackoverflow.com
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For anyone else having the same issue with the integrity, adding the following code to my config.yml file solved the problem.
这个有效
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download.mikroe.com download.mikroe.comMLX753051
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Figure 3Relative Spectral Response00.20.40.60.811.2350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050Wave Length [nm]Relative Spectral Response
看图是线性关系
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Consider a small 4-byte file. With a two block metadata-pair and one block for the CTZ skip-list, we find ourselves using a full 3 blocks. On most NOR flash with 4 KiB blocks, this is 12 KiB of overhead. A ridiculous 3072x increase.
小文件的存储开销大
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The main downside is performance
日志型文件系统存在性能问题
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we have logging filesystems, such as JFFS, YAFFS, and SPIFFS,
日志文件系统,掉电保护的实现方式之一
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such as FAT and ext2.
没有掉电保护和磨损均衡
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- Jan 2024
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docs.zephyrproject.org docs.zephyrproject.org
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Bluetooth Shell
rw612 和这个文档基本一样
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Local file Local file
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Manufacturer and Device Identification
MID与XM25QU32C一样,还有看其他参数是否有差异
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b, rb+, wb, wb+, ab, ab+
fdi nvm只支持这几个权限,仅w权限会打开失败。老坑了。
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Local file Local file
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设备注册singleSert
测试使用get方法, https 的证书?
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原有的通道为星图,新的通道为阿里云微消息队列,当发现设备的 mac 地址在认证表中时,使用阿里云通道下载数据,否则使用星图通道
要增加新的消息通道下发消息处理,同时还要兼容旧的。这里需要对业务功能熟悉才能搞。
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0不需要重新生成设备证书、1需要重新生成设备证书
什么时候需要重新生成证书?
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tp合法性校验字段,根据指定加密盐(salt)生成
签名算法没给出
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Up to eight pins can be selected from all GPIO pins on ports 0 and 1 as edge-sensitive or level-sensitiveinterrupt requests
有些脚不可以?
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www.byteparadigm.com www.byteparadigm.com
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Use another master edge for sampling data.
在另一个时钟边沿采样。有些spi控制器可以延迟半个时钟周期或者1个时钟周期采样。
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This means that the SCLK frequency can be at max: 1/ 18.56 ns = 53.87 MHz if a 'pure SPI' protocol has to beused with the provided system.
另一种解决方案是降频
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Shorten the connections and find a Slave with a shorter clock to output delay. However such a 'fasterslave' may simply not be available. Using shorter or 'faster' connections will also have a very limited impactbecause this is the smallest share of the 'missing' timing budget
缩短二者的电路连接影响甚微。在这种频率下能够快速响应的slave也难以做到。
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TSamp
master 采样的可用时间
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tprop_data
slave数据输出到master的延迟
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tSSCLKtoOut
slave 时钟到数据输出的延迟
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tprop_SCLK
master 到 slave 的时钟 延迟
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TSamp = TSCLK / 2 - tprop_SCLK - tSSCLKtoOut - tprop_data
采样时间的计算
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