https://dean.sellers.id.au/tags/oscilloscope/ Recent content in Oscilloscope on Ampsand Hugo en-AU Dean Sellers Thu, 29 Oct 2026 12:04:08 +1100 https://dean.sellers.id.au/2026/10/27/riscv-14-measuring-the-board/ Tue, 27 Oct 2026 14:00:00 +1100 https://dean.sellers.id.au/2026/10/27/riscv-14-measuring-the-board/ <p class="post-subtitle">Measuring the board</p><p><em>Part 14 of the RISC-V soft core series. Previously: <a href="https://dean.sellers.id.au/2026/10/23/riscv-13-the-board-arrives/">The board arrives</a>.</em></p> <p>Part 13 ended with a list of things only the board can tell me. This part is the list I could get to: a scope on three signals, and a lot of bytes down the serial port. This might be the first part with no surprises, or a bunch of <em>that&rsquo;s what I thought</em> bits.</p> <p>I&rsquo;ll say up front what is <em>not</em> here. I haven&rsquo;t shown that the core meets 25 MHz on every path, and I haven&rsquo;t looked at button bounce or the 7-segment flicker. Those are still to do, and maybe I will. This isn&rsquo;t going to production, and with the signals I scoped and the serial soaks behind me I am fairly confident that what is supposed to happen is happening. As we know though &hellip; there are always edges.</p>