feat: worked writing using probe
This commit is contained in:
+7
-2
@@ -1,6 +1,9 @@
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[build]
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target = "thumbv6m-none-eabi"
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[env]
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DEFMT_LOG = "trace"
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[target.thumbv6m-none-eabi]
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rustflags = [
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"-C",
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@@ -8,11 +11,13 @@ rustflags = [
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"-C",
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"link-arg=-Tlink.x",
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"-C",
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"link-arg=-Tdefmt.x",
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"-C",
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"no-vectorize-loops",
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]
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runner = "picotool load --update --verify --execute -t elf"
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#runner = "picotool load --update --verify --execute -t elf"
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# This runner will find a supported SWD debug probe and flash your RP2040 over
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# SWD:
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# runner = "probe-rs run --chip RP2040"
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runner = "probe-rs run --chip RP2040 --protocol swd --speed 2000"
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Generated
+82
-2
@@ -74,6 +74,12 @@ version = "0.14.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2d7e60934ceec538daadb9d8432424ed043a904d8e0243f3c6446bce549a46ac"
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[[package]]
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name = "bitflags"
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version = "1.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
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[[package]]
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name = "bitflags"
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version = "2.13.0"
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@@ -189,6 +195,47 @@ version = "0.3.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "80a4af69c60438a1a82af89d362f4729fd38db7b73f305a237636fad31ceb2bf"
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[[package]]
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name = "defmt"
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version = "1.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e2953bfe4f93bbd20cc71198842756f77d161884c99ebbabc41d80231ded88d1"
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dependencies = [
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"bitflags 1.3.2",
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"defmt-macros",
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]
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[[package]]
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name = "defmt-macros"
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version = "1.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bad9c72e7ca2137e0dc3813245a0d282fd6daad32fd800af018306a9169b5fe8"
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dependencies = [
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"defmt-parser",
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"proc-macro2",
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"quote",
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"syn 2.0.118",
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]
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[[package]]
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name = "defmt-parser"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
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dependencies = [
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"thiserror",
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]
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[[package]]
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name = "defmt-rtt"
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version = "1.3.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "05144944c117db54127a8ac17a3c9a28d55e7047bfddb950bcd20b4a94c79b10"
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dependencies = [
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"critical-section",
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"defmt",
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]
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[[package]]
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name = "digest"
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version = "0.10.7"
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@@ -608,6 +655,16 @@ version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a513e167849a384b7f9b746e517604398518590a9142f4846a32e3c2a4de7b11"
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[[package]]
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name = "panic-probe"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fd402d00b0fb94c5aee000029204a46884b1262e0c443f166d86d2c0747e1a1a"
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dependencies = [
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"cortex-m",
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"defmt",
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]
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[[package]]
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name = "parking_lot"
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version = "0.12.5"
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@@ -661,10 +718,13 @@ name = "pico"
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version = "0.1.0"
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dependencies = [
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"cortex-m-rt",
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"defmt",
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"defmt-rtt",
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"embedded-graphics",
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"embedded-hal 1.0.0",
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"heapless 0.9.3",
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"panic-halt",
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"panic-probe",
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"rp2040-boot2",
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"rp2040-hal",
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"ssd1306",
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@@ -797,7 +857,7 @@ version = "0.11.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "679341d22c78c6c649893cbd6c3278dcbe9fc4faa62fea3a9296ae2b50c14625"
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dependencies = [
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"bitflags",
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"bitflags 2.13.0",
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"memchr",
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"unicase",
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]
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@@ -823,7 +883,7 @@ version = "0.5.18"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
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dependencies = [
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"bitflags",
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"bitflags 2.13.0",
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]
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[[package]]
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@@ -1072,6 +1132,26 @@ dependencies = [
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"winapi-util",
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]
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[[package]]
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name = "thiserror"
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version = "2.0.18"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
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dependencies = [
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"thiserror-impl",
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]
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[[package]]
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name = "thiserror-impl"
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version = "2.0.18"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn 2.0.118",
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]
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[[package]]
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name = "typenum"
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version = "1.20.1"
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@@ -5,10 +5,13 @@ edition = "2024"
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[dependencies]
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cortex-m-rt = "0.7.5"
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defmt = "1.1.1"
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defmt-rtt = "1.3.0"
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embedded-graphics = "0.8.2"
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embedded-hal = "1.0.0"
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heapless = "0.9.3"
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panic-halt = "1.0.0"
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panic-probe = { version = "1.0.0", features = ["print-defmt"] }
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rp2040-boot2 = "0.3.0"
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rp2040-hal = { version = "0.12.0", features = ["critical-section-impl"] }
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ssd1306 = "0.10.0"
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+267
@@ -0,0 +1,267 @@
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# Raspberry Pi Pico Debugging mit Rust
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## ST-Link V2 funktioniert nicht mit dem RP2040
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### Problem
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Beim Verbinden über `probe-rs` erschien:
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```text
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JtagGetIdcodeError
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```
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Mit OpenOCD:
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```text
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Error: init mode failed (unable to connect to the target)
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```
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### Ursache
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Der verwendete günstige ST-Link-V2-Klon konnte zwar erkannt werden und sogar die Zielspannung messen, war aber nicht in der Lage, zuverlässig mit dem RP2040 über SWD zu kommunizieren.
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### Lösung
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Verwendung der offiziellen **Raspberry Pi Debug Probe** (CMSIS-DAP).
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---
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## Raspberry Pi Debug Probe
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Die Raspberry Pi Debug Probe wird von `probe-rs` und OpenOCD nativ unterstützt.
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Verkabelung:
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```
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Debug Probe Pico
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SWCLK --------> SWCLK
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SWDIO --------> SWDIO
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GND --------> GND
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```
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Der Pico kann weiterhin separat per USB versorgt werden.
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---
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## Firmware der Debug Probe aktualisieren
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`probe-rs` meldete:
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```text
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The firmware on the probe is outdated.
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The minimum supported firmware version is 2.2.0.
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```
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### Lösung
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Firmware der Debug Probe mittels UF2-Datei aktualisieren.
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Danach funktionierte `probe-rs` problemlos.
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---
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## OpenOCD testen
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Zum Testen der SWD-Verbindung:
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```bash
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openocd \
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-f interface/cmsis-dap.cfg \
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-f target/rp2040.cfg
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```
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Erfolgreiche Verbindung erkennt man an:
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```text
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SWD DPIDR 0x0bc12477
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```
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---
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## probe-rs als Cargo Runner
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In `.cargo/config.toml`:
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```toml
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[target.thumbv6m-none-eabi]
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runner = "probe-rs run --chip RP2040 --protocol swd"
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```
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Dadurch führt `cargo run` automatisch aus:
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- Build
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- Flash
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- Reset
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- Start
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- RTT/defmt-Monitoring
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---
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## cargo run beendet sich nicht
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### Beobachtung
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Nach dem Flashen blieb `cargo run` geöffnet.
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### Erklärung
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Das ist beabsichtigt.
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`probe-rs run` bleibt mit dem Mikrocontroller verbunden, damit:
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- RTT gelesen werden kann
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- `defmt`-Logs angezeigt werden
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- später Debugging möglich ist
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---
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## defmt einrichten
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Benötigte Crates:
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```toml
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defmt = "1"
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defmt-rtt = "1"
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panic-probe = { version = "...", features = ["print-defmt"] }
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```
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Initialisierung:
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```rust
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use defmt_rtt as _;
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use panic_probe as _;
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```
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Logs:
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```rust
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defmt::info!("Hello!");
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defmt::warn!("Voltage low");
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defmt::debug!("Counter = {}", counter);
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```
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---
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## duplicate lang item: panic_impl
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### Problem
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```text
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duplicate lang item: panic_impl
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```
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### Ursache
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Es waren zwei Panic-Handler eingebunden.
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Beispielsweise:
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```rust
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use panic_halt as _;
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```
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und zusätzlich
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```rust
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use panic_probe as _;
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```
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### Lösung
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Es darf nur **ein** Panic-Handler vorhanden sein.
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Für `defmt` sollte ausschließlich `panic-probe` verwendet werden.
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---
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## Failed to parse defmt data
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### Problem
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```text
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Failed to parse defmt data
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defmt version found, but no .defmt section
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```
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### Ursache
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Das Linkerscript `defmt.x` wurde nicht eingebunden.
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### Lösung
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`.cargo/config.toml` erweitern:
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```toml
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rustflags = [
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"-C", "link-arg=-Tlink.x",
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"-C", "link-arg=-Tdefmt.x",
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]
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```
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---
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## Keine defmt-Ausgaben sichtbar
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### Ursache
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`DEFMT_LOG` war nicht gesetzt.
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### Lösung
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In `.cargo/config.toml`:
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```toml
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[env]
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DEFMT_LOG = "info"
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```
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oder
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```toml
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DEFMT_LOG = "debug"
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```
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oder
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```toml
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DEFMT_LOG = "trace"
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```
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Danach wurden die Log-Ausgaben sofort angezeigt.
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---
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## Debugging-Geschwindigkeit
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Anfangs wurde mit
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```text
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--speed 100
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```
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gearbeitet.
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Das funktioniert zuverlässig, ist aber sehr langsam.
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Später kann die Geschwindigkeit auf mehrere MHz erhöht werden, z.B.
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```text
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--speed 4000
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```
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was Flash- und Debug-Zeiten deutlich reduziert.
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---
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## Erkenntnisse
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- SWD benötigt lediglich:
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- SWCLK
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- SWDIO
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- GND
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- Der Pico kann gleichzeitig per USB versorgt werden.
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- `probe-rs run` ersetzt den manuellen Flash-Vorgang.
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- `defmt` ist der De-facto-Standard für Logging im Rust-Embedded-Ökosystem.
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- Die Raspberry Pi Debug Probe funktioniert mit dem RP2040 deutlich zuverlässiger als günstige ST-Link-V2-Klone.
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@@ -1,4 +1,6 @@
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use defmt_rtt as _;
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use panic_halt as _;
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// use panic_probe as _;
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use rp2040_hal::{
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Timer,
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clocks::ClocksManager,
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@@ -16,6 +16,8 @@ use crate::display::DisplayModule;
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#[rp2040_hal::entry]
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fn main() -> ! {
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defmt::info!("Controller started.");
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|
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let PicoParts {
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timer,
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pins,
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Reference in New Issue
Block a user