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STM32F407开发板 WiFi模块 SDIO/SPI高速视频传输 带OV2640摄像头

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he Marvell 88W8801 is a highly integrated, single-band (2.4 GHz) IEEE 802.11n 1x1
System-on-Chip (SoC), specifically designed to support High Throughput (HT) data rates for next generation WLAN products.
The device provides the combined functions of Direct Sequence Spread Spectrum (DSSS) and Orthogonal Frequency Division Multiplexing (OFDM) baseband modulation, Medium Access Controller (MAC), CPU, memory, host interfaces, and direct conversion WLAN
RF radio on a single integrated chip.
For security, the 802.11i security standard is supported through several protocols. And for video, voice, and multimedia applications, 802.11e Quality of Service
(QoS) is supported.
Generic interfaces include a USB 2.0 device and SDIO 2.0 interface for connecting WLAN technologies to the host processor.
以上话是摘自datasheet上,有几个关键的点需要再罗嗦下:
1)单频,也就是只支持2.4G
2)支持802.11N(这里不罗嗦这个概念)
3)System-on-Chip (SoC),这个是什么意思呢,我用最简短的话来概括下,正常来说芯片之间会按照802.11的数据帧格式来进行数据传输,但是作为驱动,是根据芯片要求的特定的command形式下发给芯片命令,然后芯片内部解析完毕(解析的程序你就可以理解为开始下载的firmware)再转换成802.11帧发送出去,如果你还不是很懂,没关系,继续往后看,会懂我在说什么。
4)接口是USB2.0,SDIO 2.0,也就是说Marvell支持两种接口,USB,SDIO,版本分别都是2.0,本系列文章是基于SDIO的接口来做的。
5)至于一些名词,比如HT,DSSS,OFDM,QoS之类的暂时不需要关注,是802.11的概念
802.11概念比较繁杂,我们暂时先不做说明
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版权声明:本文为CSDN博主「Wireless_Link」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/XiaoXiaoPengBo/article/details/103786004