2021-08-30T06:24:55Z
FluxBB
https://whycan.com/viewtopic.php?id=7080
无意间搜到sigrok和plusview项目,打算入坑开源逻辑分析]]>
https://whycan.com/profile.php?id=1315
2021-08-30T06:24:55Z
https://whycan.com/viewtopic.php?pid=67833#p67833
可以通过输入捕获+定时器计次试试,短时间说不定可以,时间长了数据存储可能也有点问题]]>
https://whycan.com/profile.php?id=7105
2021-08-30T03:15:51Z
https://whycan.com/viewtopic.php?pid=67832#p67832
加一个FPGA试试]]>
https://whycan.com/profile.php?id=739
2021-08-27T00:44:05Z
https://whycan.com/viewtopic.php?pid=67738#p67738
用逻辑分析仪抓了一下,周期大概15us,高电平2us。
]]>
https://whycan.com/profile.php?id=1315
2021-08-26T17:37:38Z
https://whycan.com/viewtopic.php?pid=67737#p67737
最小周期 2us,500khz.印象中stm32f1x 的捕获方式测频率好像不行]]>
https://whycan.com/profile.php?id=1407
2021-08-26T14:34:14Z
https://whycan.com/viewtopic.php?pid=67733#p67733
需要测量脉冲宽度,相当于做个3通道逻辑分析仪]]>
https://whycan.com/profile.php?id=1315
2021-08-26T12:04:39Z
https://whycan.com/viewtopic.php?pid=67731#p67731
没太看明白用途,是需要捕获到跳变沿,还是要测量2us的脉冲宽度?
这两种完全不同,如果只是跳变沿,用外部中断(注意外部中断了滤波的设置参数),
如果是测量脉冲宽度就用timer的捕获模式,2us的宽度stm32全系列应该都没问题,就是看mcu还有没有精力去处理捕获之后的数据]]>
https://whycan.com/profile.php?id=2619
2021-08-26T10:53:00Z
https://whycan.com/viewtopic.php?pid=67727#p67727
逻辑分析仪抓了一下,时钟信号好高电平大概只持续了1us多。采样要2m或更高才行]]>
https://whycan.com/profile.php?id=1315
2021-08-26T06:59:51Z
https://whycan.com/viewtopic.php?pid=67700#p67700
要这么精确干嘛?1us应该可以吧!看MCU的定时器时钟啊!如果1m那记一次就1us,一般来说MCU最低8m,2us唾手可得啊!stm32就戳戳有余,反正是硬件脉冲捕获,设置上升沿中断,下降沿中断,读定时器就OK啊!至于频繁中断,中断里不干其他事就算一下计数器差值,没问题的!任何MCU都行。]]>
https://whycan.com/profile.php?id=6953
2021-08-26T05:17:29Z
https://whycan.com/viewtopic.php?pid=67694#p67694
信号有点类似spi,有时钟和数据]]>
https://whycan.com/profile.php?id=1315
2021-08-26T04:36:50Z
https://whycan.com/viewtopic.php?pid=67690#p67690
mcu型号不限,能够采集3路就行]]>
https://whycan.com/profile.php?id=1315
2021-08-26T04:11:14Z
https://whycan.com/viewtopic.php?pid=67688#p67688