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Somewhat pocket-sized article comparing a few of the more common debug probes for Cortex-M targets.
noahp
commented
Apr 14, 2022
| if you already have the host computer J-Link software installed. The integrated | ||
| J-Links often have a debug serial port attached to a target UART too! | ||
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| Other features of note: |
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noahp
commented
Apr 14, 2022
| | Black Magic Probe | $60 | ✅ | yes, +3.3v (100mA) only | ✅ | 〰️ ok (but open source!) | | ||
| | DAPLink | $5-$15 | ❌ | | ✅ | 〰️ ok (but open source!) | | ||
| | FTDI FT2232H | $35 ($5 for chip only) | ✅ | varies, adafruit yes | ❌ | 🔼 good | | ||
| | Raspberry Pi Pico | $4 | ✅ | | ❌ | 🔼 good + open source | |
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fix: basically is open source, schematic + sw is published
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Good start! I'd argue that you need a bit more pros/cons written up for each entry. You could have the "Software" portion (which is yet to be written) be a part two follow on article. |
franc0is
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Apr 15, 2022
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| ## Debug Adapter Hardware | ||
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| First off, if you haven't already, take a look at Chris's deep dive on Cortex-M |
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Make this a callout, rather than the first sentence of the paragraph
| debug interfaces, which also covers some of the probes in this article: | ||
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| <https://interrupt.memfault.com/blog/a-deep-dive-into-arm-cortex-m-debug-interfaces> | ||
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Add a sentence at the beginning of this section explaining what a debug adapter is.
| Some probes will support JTAG too, but when working with Cortex-M devices, it's | ||
| often not as preferrable as SWD due to higher pin utilization. | ||
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| Also I'll be focusing on non-trace enabled probes (though some will support some |
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| Also I'll be focusing on non-trace enabled probes (though some will support some | |
| I'll be focusing on non-trace enabled probes (though some will support some |
| including flash algorithms (ability to write a program to target internal | ||
| flash). | ||
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| It's fairly commonly included on development boards, which makes setup simpler |
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| It's fairly commonly included on development boards, which makes setup simpler | |
| It is fairly commonly included on development boards, which makes setup simpler |
| Depending on which FTDI chip you're using, you can use spare UARTs for a debug | ||
| console to your target. | ||
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| One nice thing about this approach is it's possible to add the FTDI chip to your |
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I'd argue that you can do this with DAPLink as well
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Somewhat pocket-sized article comparing a few of the more common debug
probes for Cortex-M targets.