<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[crazykwb的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/crazykwb</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; crazykwb]]></copyright><item><title><![CDATA[ov5640_rgmii_udp]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121991347</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121991347</guid><author>crazykwb</author><pubDate>Fri, 17 Dec 2021 11:57:35 +0800</pubDate><description><![CDATA[FPGA，图像前置处理，UDP传输，图像采集。。。]]></description><category></category></item><item><title><![CDATA[SD卡读取BMP图片显示例程]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121990359</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121990359</guid><author>crazykwb</author><pubDate>Fri, 17 Dec 2021 10:39:04 +0800</pubDate><description><![CDATA[在前面的实验中我们练习了SD卡读写，VGA视频显示等例程，本实验将SD卡里的BMP图片读出，写入到外部存储器，再通过VGA、LCD等显示。在前面的实验中我们在VGA上显示的是彩条，是FPGA内部产生的数据，本实验将彩条替换为SD内的BMP图片数据，但是SD卡读取速度远远不能满足显示速度的要求，只能先写入外部高速RAM，再读出后给视频时序模块显示。





我想对于初学者来说看了一个这么复杂的网络，最开始一定是处于比较懵逼的状态。但是身为一个FPGA工程师，我们一定要具备像工藤新一一样抽丝剥茧的能力，这么.]]></description><category></category></item><item><title><![CDATA[vga_char设计]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121989631</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121989631</guid><author>crazykwb</author><pubDate>Fri, 17 Dec 2021 10:16:48 +0800</pubDate><description><![CDATA[实验通过字符转换工具将字符转换为8进制mif文件存放在单端口的ROM IP核中，再从ROM中把转换后的数据读取出来显示到VGA上。






]]></description><category></category></item><item><title><![CDATA[sd_card_audio]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121989023</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121989023</guid><author>crazykwb</author><pubDate>Fri, 17 Dec 2021 09:41:56 +0800</pubDate><description><![CDATA[我们在前文中讲过一个关于audio的例程，它主要完成了录制播放功能(直接从SDRAM中写/读数据)，而本文相较之前的例程有两处不同，第一处：本例程是从SD卡中读取数据；第二处：本例程添加了文件检索功能(但是并没有添加文件系统)。关于第一处我们没有太多问题，因为在之前关于SD卡的读写已经详细讲解过了，那么第二处的文件检索就成为了重中之重，在没有文件系统的情况下如何完成文件检索？在已知文件格式为WAV的条件下(大部分的文件都有文件头)，我们需要做的是分析SD卡一个扇区的前几个字节，判断这个文件是否为WAV文件。]]></description><category></category></item><item><title><![CDATA[FPGA-音频模块开发(三)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121982602</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121982602</guid><author>crazykwb</author><pubDate>Fri, 17 Dec 2021 09:18:41 +0800</pubDate><description><![CDATA[frame_read_write.v



从RTL视图中可以看出，该模块由多个子模块（afifo_64i_16o_64、afifo_16i_64o_256、frame_fifo_write、frame_fifo_read）组成。

其中afifo_64i_16o_64.v作为一个连接audio_record_play_ctrl与frame_fifo_write的跨时域数据交互，前者的时钟为系统时钟，后者的时钟为MEM_CLK。我们可以看到在RTL视图中连接到这个fifo中几个主要的信号：

其中有两个异步]]></description><category></category></item><item><title><![CDATA[FPGA-音频模块开发(二)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121982212</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121982212</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 19:54:32 +0800</pubDate><description><![CDATA[FPGA-音频开发]]></description><category></category></item><item><title><![CDATA[FPGA-音频模块开发(一)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121981805</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121981805</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 19:32:19 +0800</pubDate><description><![CDATA[FPGA-音频]]></description><category></category></item><item><title><![CDATA[SDRAM开发(三)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121981657</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121981657</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 19:11:14 +0800</pubDate><description><![CDATA[FPGA-SDRAM]]></description><category></category></item><item><title><![CDATA[SDRAM开发(二)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121981397</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121981397</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 19:03:58 +0800</pubDate><description><![CDATA[FPGA-SDRAM]]></description><category></category></item><item><title><![CDATA[SDRAM开发(一)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121981219</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121981219</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 18:48:33 +0800</pubDate><description><![CDATA[FPGA-SDRAM]]></description><category></category></item><item><title><![CDATA[SD卡开发学习总结(四)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121981121</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121981121</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 18:34:18 +0800</pubDate><description><![CDATA[FPGA-SD开发]]></description><category></category></item><item><title><![CDATA[SD卡开发学习总结(三)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121980794</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121980794</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 18:28:47 +0800</pubDate><description><![CDATA[FPGA-SD卡开发]]></description><category></category></item><item><title><![CDATA[SD卡开发学习总结(二)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121980604</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121980604</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 18:06:14 +0800</pubDate><description><![CDATA[FPGA-SD卡开发]]></description><category></category></item><item><title><![CDATA[SD卡开发学习总结(一)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121980102</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121980102</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 17:49:14 +0800</pubDate><description><![CDATA[FPGA之SD卡开发]]></description><category></category></item><item><title><![CDATA[AXI Protocal(一)]]></title><link>https://blog.youkuaiyun.com/crazykwb/article/details/121979807</link><guid>https://blog.youkuaiyun.com/crazykwb/article/details/121979807</guid><author>crazykwb</author><pubDate>Thu, 16 Dec 2021 17:33:01 +0800</pubDate><description><![CDATA[AXI]]></description><category></category></item></channel></rss>