enable semihosting
This commit is contained in:
parent
5d8f3e1db9
commit
8e424b675e
17 changed files with 44 additions and 991 deletions
3
.vscode/launch.json
vendored
3
.vscode/launch.json
vendored
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@ -12,6 +12,9 @@
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"type": "cortex-debug",
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"type": "cortex-debug",
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"preLaunchTask": "cargo build",
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"preLaunchTask": "cargo build",
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"servertype": "openocd",
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"servertype": "openocd",
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"preLaunchCommands": [
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"monitor arm semihosting enable",
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],
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"svdFile": "${workspaceFolder}/bluepill-rs/STM32F103.svd",
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"svdFile": "${workspaceFolder}/bluepill-rs/STM32F103.svd",
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"configFiles": [
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"configFiles": [
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"interface/stlink.cfg",
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"interface/stlink.cfg",
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114
bluepill-rs/Cargo.lock
generated
114
bluepill-rs/Cargo.lock
generated
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@ -51,13 +51,12 @@ dependencies = [
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"cortex-m",
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"cortex-m",
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"cortex-m-rt",
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"cortex-m-rt",
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"cortex-m-rtic",
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"cortex-m-rtic",
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"defmt",
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"cortex-m-semihosting",
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"defmt-ringbuf",
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"defmt-rtt",
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"embedded-hal 1.0.0",
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"embedded-hal 1.0.0",
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"heapless 0.8.0",
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"heapless 0.8.0",
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"nb 1.1.0",
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"nb 1.1.0",
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"panic-halt",
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"panic-halt",
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"panic-semihosting",
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"stm32f1",
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"stm32f1",
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"stm32f1xx-hal",
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"stm32f1xx-hal",
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"systick-monotonic",
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"systick-monotonic",
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@ -111,7 +110,7 @@ checksum = "f0f6f3e36f203cfedbc78b357fb28730aa2c6dc1ab060ee5c2405e843988d3c7"
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dependencies = [
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dependencies = [
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"proc-macro2",
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"proc-macro2",
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"quote",
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"quote",
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"syn 1.0.109",
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"syn",
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]
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]
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[[package]]
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[[package]]
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@ -139,7 +138,16 @@ dependencies = [
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"proc-macro2",
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"proc-macro2",
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"quote",
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"quote",
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"rtic-syntax",
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"rtic-syntax",
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"syn 1.0.109",
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"syn",
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]
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[[package]]
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name = "cortex-m-semihosting"
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version = "0.5.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c23234600452033cc77e4b761e740e02d2c4168e11dbf36ab14a0f58973592b0"
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dependencies = [
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"cortex-m",
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]
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]
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[[package]]
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[[package]]
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@ -148,57 +156,6 @@ version = "1.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
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checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
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[[package]]
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name = "defmt"
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version = "0.3.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3939552907426de152b3c2c6f51ed53f98f448babd26f28694c95f5906194595"
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dependencies = [
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"bitflags",
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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 = "0.3.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "18bdc7a7b92ac413e19e95240e75d3a73a8d8e78aa24a594c22cbb4d44b4bbda"
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dependencies = [
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"defmt-parser",
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"proc-macro-error",
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"proc-macro2",
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"quote",
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"syn 2.0.52",
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]
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[[package]]
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name = "defmt-parser"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ff4a5fefe330e8d7f31b16a318f9ce81000d8e35e69b93eae154d16d2278f70f"
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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-ringbuf"
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version = "0.2.0"
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dependencies = [
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"cortex-m",
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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 = "defmt-rtt"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "609923761264dd99ed9c7d209718cda4631c5fe84668e0f0960124cbb844c49f"
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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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[[package]]
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name = "embedded-dma"
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name = "embedded-dma"
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version = "0.2.0"
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version = "0.2.0"
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@ -337,6 +294,16 @@ version = "0.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
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checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
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[[package]]
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name = "panic-semihosting"
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version = "0.6.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ee8a3e1233d9073d76a870223512ce4eeea43c067a94a445c13bd6d792d7b1ab"
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dependencies = [
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"cortex-m",
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"cortex-m-semihosting",
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]
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[[package]]
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[[package]]
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name = "proc-macro-error"
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name = "proc-macro-error"
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version = "1.0.4"
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version = "1.0.4"
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@ -346,7 +313,7 @@ dependencies = [
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"proc-macro-error-attr",
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"proc-macro-error-attr",
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"proc-macro2",
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"proc-macro2",
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"quote",
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"quote",
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"syn 1.0.109",
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"syn",
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"version_check",
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"version_check",
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]
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]
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@ -400,7 +367,7 @@ dependencies = [
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"indexmap",
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"indexmap",
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"proc-macro2",
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"proc-macro2",
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"quote",
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"quote",
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"syn 1.0.109",
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"syn",
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]
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]
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[[package]]
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[[package]]
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@ -517,17 +484,6 @@ dependencies = [
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"unicode-ident",
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"unicode-ident",
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]
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]
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[[package]]
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name = "syn"
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version = "2.0.52"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b699d15b36d1f02c3e7c69f8ffef53de37aefae075d8488d4ba1a7788d574a07"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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[[package]]
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name = "systick-monotonic"
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name = "systick-monotonic"
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version = "1.0.1"
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version = "1.0.1"
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@ -539,26 +495,6 @@ dependencies = [
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"rtic-monotonic",
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"rtic-monotonic",
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]
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]
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[[package]]
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name = "thiserror"
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version = "1.0.57"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1e45bcbe8ed29775f228095caf2cd67af7a4ccf756ebff23a306bf3e8b47b24b"
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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 = "1.0.57"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a953cb265bef375dae3de6663da4d3804eee9682ea80d8e2542529b73c531c81"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn 2.0.52",
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]
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[[package]]
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[[package]]
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name = "unicode-ident"
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name = "unicode-ident"
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version = "1.0.12"
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version = "1.0.12"
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@ -6,8 +6,7 @@ edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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[dependencies]
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defmt-ringbuf = { path = "../defmt-ringbuf", optional = true }
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# main deps
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embedded-hal = "1.0.0"
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embedded-hal = "1.0.0"
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stm32f1 = { version = "0.15", features = ["stm32f103", "rt"] }
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stm32f1 = { version = "0.15", features = ["stm32f103", "rt"] }
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stm32f1xx-hal = { version = "0.10.0", features = ["rt", "stm32f103", "medium"] }
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stm32f1xx-hal = { version = "0.10.0", features = ["rt", "stm32f103", "medium"] }
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@ -17,9 +16,10 @@ cortex-m-rt = { version = "0.7.1", features = ["device"] }
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cortex-m-rtic = "1.1.4"
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cortex-m-rtic = "1.1.4"
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systick-monotonic = "1.0.1"
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systick-monotonic = "1.0.1"
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defmt = { version = "0.3", features = ["encoding-rzcobs"] }
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# i2c_slave deps
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defmt-rtt = { version = "0.4", optional = true }
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heapless = "0.8.0"
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heapless = "0.8.0"
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# Panic behaviour, see https://crates.io/keywords/panic-impl for alternatives
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# Panic behaviour, see https://crates.io/keywords/panic-impl for alternatives
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cortex-m-semihosting = "0.5.0"
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panic-halt = "0.2.0"
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panic-halt = "0.2.0"
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panic-semihosting = "0.6.0"
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@ -99,7 +99,7 @@ where
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self.pos = 0;
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self.pos = 0;
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return Ok(Event::Read { reg: self.reg });
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return Ok(Event::Read { reg: self.reg });
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}
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}
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_ => defmt::unreachable!(),
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_ => unreachable!(),
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},
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},
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State::ReceiveReg => match self.i2c_event()? {
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State::ReceiveReg => match self.i2c_event()? {
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I2cEvent::Read(value) => {
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I2cEvent::Read(value) => {
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@ -107,7 +107,7 @@ where
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self.state = State::ReceivedReg;
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self.state = State::ReceivedReg;
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}
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}
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I2cEvent::End | I2cEvent::Restart => self.state = State::Idle,
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I2cEvent::End | I2cEvent::Restart => self.state = State::Idle,
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_ => defmt::unreachable!(),
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_ => unreachable!(),
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},
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},
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State::ReceivedReg => match self.i2c_event()? {
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State::ReceivedReg => match self.i2c_event()? {
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I2cEvent::Read(value) => {
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I2cEvent::Read(value) => {
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|
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@ -128,7 +128,7 @@ where
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});
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});
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}
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}
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I2cEvent::Restart => self.state = State::Idle,
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I2cEvent::Restart => self.state = State::Idle,
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_ => defmt::unreachable!(),
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_ => unreachable!(),
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},
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},
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State::Receiving => match self.i2c_event()? {
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State::Receiving => match self.i2c_event()? {
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I2cEvent::Read(value) => {
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I2cEvent::Read(value) => {
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@ -143,10 +143,10 @@ where
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self.state = State::Idle;
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self.state = State::Idle;
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return Ok(Event::Write {
|
return Ok(Event::Write {
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reg: self.reg,
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reg: self.reg,
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value: Value(defmt::unwrap!(Vec::try_from(&self.buf[..self.pos]))),
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value: Value(Vec::try_from(&self.buf[..self.pos]).unwrap()),
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});
|
});
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}
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}
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_ => defmt::unreachable!(),
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_ => unreachable!(),
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},
|
},
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State::StartSend => return Ok(Event::Read { reg: self.reg }),
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State::StartSend => return Ok(Event::Read { reg: self.reg }),
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State::Sending => {
|
State::Sending => {
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|
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@ -157,7 +157,7 @@ where
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self.pos += 1;
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self.pos += 1;
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}
|
}
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I2cEvent::End | I2cEvent::Restart => self.state = State::Idle,
|
I2cEvent::End | I2cEvent::Restart => self.state = State::Idle,
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_ => defmt::unreachable!(),
|
_ => unreachable!(),
|
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}
|
}
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}
|
}
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State::Clear => match self.i2c_event()? {
|
State::Clear => match self.i2c_event()? {
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|
|
@ -179,7 +179,7 @@ where
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self.pos = 0;
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self.pos = 0;
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self.state = State::Sending;
|
self.state = State::Sending;
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} else {
|
} else {
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defmt::panic!("I2C register slave had no read register event")
|
panic!("I2C register slave had no read register event")
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}
|
}
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}
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}
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}
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}
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|
|
@ -284,8 +284,8 @@ impl<const BUFFER: usize> Response<BUFFER> {
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///
|
///
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/// The length of the value must not exceed `BUFFER`.
|
/// The length of the value must not exceed `BUFFER`.
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||||||
pub fn set(value: &[u8]) -> Self {
|
pub fn set(value: &[u8]) -> Self {
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defmt::assert!(value.len() <= BUFFER);
|
assert!(value.len() <= BUFFER);
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||||||
Self(defmt::unwrap!(value.try_into()))
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Self(value.try_into().unwrap())
|
||||||
}
|
}
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|
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/// Provides an empty register value which will read as all zeros.
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/// Provides an empty register value which will read as all zeros.
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|
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|
|
@ -199,7 +199,7 @@ where
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Err(nb::Error::WouldBlock)
|
Err(nb::Error::WouldBlock)
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}
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}
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}
|
}
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State::WriteWaiting => defmt::panic!("write event was not handled"),
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State::WriteWaiting => panic!("write event was not handled"),
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State::Receiving => {
|
State::Receiving => {
|
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if sr1.rx_ne().is_not_empty() {
|
if sr1.rx_ne().is_not_empty() {
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let value = self.i2c.dr.read().dr().bits();
|
let value = self.i2c.dr.read().dr().bits();
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|
@ -5,7 +5,8 @@
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mod i2c_reg_slave;
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mod i2c_reg_slave;
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mod i2c_slave;
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mod i2c_slave;
|
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|
|
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use panic_halt as _;
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// extern crate panic_halt;
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|
extern crate panic_semihosting;
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|
|
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#[rtic::app(device = stm32f1::stm32f103, peripherals = true)]
|
#[rtic::app(device = stm32f1::stm32f103, peripherals = true)]
|
||||||
mod app {
|
mod app {
|
||||||
|
|
|
||||||
248
defmt-ringbuf/Cargo.lock
generated
248
defmt-ringbuf/Cargo.lock
generated
|
|
@ -1,248 +0,0 @@
|
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# This file is automatically @generated by Cargo.
|
|
||||||
# It is not intended for manual editing.
|
|
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version = 3
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|
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|
|
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[[package]]
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|
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name = "bare-metal"
|
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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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4. Redistribution. You may reproduce and distribute copies of the
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|
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|
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|
||||||
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|
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(c) You must retain, in the Source form of any Derivative Works
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(d) If the Work includes a "NOTICE" text file as part of its
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|
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|
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|
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|
||||||
END OF TERMS AND CONDITIONS
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|
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|
||||||
APPENDIX: How to apply the Apache License to your work.
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|
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To apply the Apache License to your work, attach the following
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|
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Copyright [yyyy] [name of copyright owner]
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|
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|
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Licensed under the Apache License, Version 2.0 (the "License");
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|
||||||
You may obtain a copy of the License at
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|
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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|
||||||
limitations under the License.
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|
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|
@ -1,23 +0,0 @@
|
||||||
Permission is hereby granted, free of charge, to any
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|
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person obtaining a copy of this software and associated
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|
||||||
documentation files (the "Software"), to deal in the
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Software without restriction, including without
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limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of
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is furnished to do so, subject to the following
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conditions:
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|
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The above copyright notice and this permission notice
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shall be included in all copies or substantial portions
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|
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of the Software.
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|
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|
||||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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|
||||||
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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|
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TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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|
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PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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|
||||||
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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|
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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|
||||||
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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|
||||||
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
||||||
DEALINGS IN THE SOFTWARE.
|
|
||||||
|
|
@ -1,21 +0,0 @@
|
||||||
# defmt-ringbuf
|
|
||||||
|
|
||||||
This crate stores [`defmt`] log messages in a simple ring buffer that is persisted across resets.
|
|
||||||
You still need to read the messages from the buffer and transfer them to a host for formatting.
|
|
||||||
|
|
||||||
[`defmt`]: https://github.com/knurling-rs/defmt
|
|
||||||
|
|
||||||
## License
|
|
||||||
|
|
||||||
Licensed under either of
|
|
||||||
|
|
||||||
- [Apache License, Version 2.0](LICENSE-APACHE)
|
|
||||||
- [MIT license](LICENSE-MIT)
|
|
||||||
|
|
||||||
at your option.
|
|
||||||
|
|
||||||
## Contribution
|
|
||||||
|
|
||||||
Unless you explicitly state otherwise, any contribution intentionally submitted
|
|
||||||
for inclusion in defmt-ringbuf by you shall be licensed as above,
|
|
||||||
without any additional terms or conditions.
|
|
||||||
|
|
@ -1,10 +0,0 @@
|
||||||
[build]
|
|
||||||
target = "thumbv7m-none-eabi"
|
|
||||||
rustflags = [
|
|
||||||
"-C", "link-arg=-Tlink.x",
|
|
||||||
"-C", "link-arg=--nmagic",
|
|
||||||
"-C", "link-arg=-Tdefmt.x",
|
|
||||||
]
|
|
||||||
|
|
||||||
[target.'cfg(all(target_arch = "arm", target_os = "none"))']
|
|
||||||
runner = "probe-run --chip STM32F103RB"
|
|
||||||
|
|
@ -1,22 +0,0 @@
|
||||||
[package]
|
|
||||||
name = "defmt-ringbuf-test"
|
|
||||||
authors = ["Sebastian Urban <surban@surban.net>"]
|
|
||||||
license = "GPL-3.0"
|
|
||||||
version = "0.0.0"
|
|
||||||
publish = false
|
|
||||||
edition = "2021"
|
|
||||||
|
|
||||||
[dependencies]
|
|
||||||
defmt-ringbuf = { path = "..", default-features = false }
|
|
||||||
|
|
||||||
cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
|
|
||||||
cortex-m-rt = { version = "0.7", features = ["device"] }
|
|
||||||
stm32f1 = { version = "0.15", features = ["stm32f103", "rt"] }
|
|
||||||
panic-probe = "0.3"
|
|
||||||
defmt = "0.3"
|
|
||||||
defmt-rtt = "0.4"
|
|
||||||
|
|
||||||
[profile.release]
|
|
||||||
opt-level = 'z'
|
|
||||||
lto = true
|
|
||||||
debug = 2
|
|
||||||
|
|
@ -1,5 +0,0 @@
|
||||||
MEMORY
|
|
||||||
{
|
|
||||||
FLASH : ORIGIN = 0x08000000, LENGTH = 64K
|
|
||||||
RAM : ORIGIN = 0x20000000, LENGTH = 20K
|
|
||||||
}
|
|
||||||
|
|
@ -1,42 +0,0 @@
|
||||||
#![no_std]
|
|
||||||
#![no_main]
|
|
||||||
|
|
||||||
use core::mem;
|
|
||||||
use cortex_m::{asm::nop, peripheral::SCB};
|
|
||||||
use cortex_m_rt::entry;
|
|
||||||
|
|
||||||
use defmt_ringbuf::{RingBuf, RingBuffer};
|
|
||||||
use defmt_rtt as _;
|
|
||||||
use panic_probe as _;
|
|
||||||
use stm32f1::stm32f103::Peripherals;
|
|
||||||
|
|
||||||
#[no_mangle]
|
|
||||||
#[used]
|
|
||||||
#[link_section = ".uninit.BUFFER"]
|
|
||||||
pub static mut BUFFER: mem::MaybeUninit<defmt_ringbuf::RingBuffer<4096>> = mem::MaybeUninit::uninit();
|
|
||||||
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
let _dp = Peripherals::take().unwrap();
|
|
||||||
|
|
||||||
defmt::info!("Init");
|
|
||||||
let buffer = unsafe { RingBuffer::init(&mut BUFFER) };
|
|
||||||
|
|
||||||
let mut data = [0; 128];
|
|
||||||
let (n, lost) = buffer.read(&mut data);
|
|
||||||
let data = &data[..n];
|
|
||||||
defmt::info!("Buffer contents (lost={}): {}", lost, data);
|
|
||||||
|
|
||||||
let mut data = [0; 255];
|
|
||||||
for (i, d) in data.iter_mut().enumerate() {
|
|
||||||
*d = i as u8;
|
|
||||||
}
|
|
||||||
buffer.write(&data);
|
|
||||||
defmt::info!("Wrote {} bytes to buffer", data.len());
|
|
||||||
|
|
||||||
defmt::info!("Done");
|
|
||||||
for _ in 0..1_000_000 {
|
|
||||||
nop();
|
|
||||||
}
|
|
||||||
SCB::sys_reset();
|
|
||||||
}
|
|
||||||
|
|
@ -1,140 +0,0 @@
|
||||||
//! defmt-ringbuf is a [`defmt`](https://github.com/knurling-rs/defmt) global logger that logs into
|
|
||||||
//! a persistent ring buffer.
|
|
||||||
//!
|
|
||||||
//! The ring buffer is not cleared at startup, i.e. if placed in a static global variable log messages
|
|
||||||
//! will still be available after a reset.
|
|
||||||
//!
|
|
||||||
//! To use this crate, link to it by importing it somewhere in your project.
|
|
||||||
//!
|
|
||||||
//! ```
|
|
||||||
//! use core::mem::MaybeUninit;
|
|
||||||
//! use defmt_ringbuf as _;
|
|
||||||
//!
|
|
||||||
//! static mut LOG: MaybeUninit<defmt_ringbuf::RingBuffer<1024>> = MaybeUninit::uninit();
|
|
||||||
//!
|
|
||||||
//! #[entry]
|
|
||||||
//! fn main() -> ! {
|
|
||||||
//! unsafe {
|
|
||||||
//! defmt_ringbuf::init(&mut LOG, || ());
|
|
||||||
//! }
|
|
||||||
//!
|
|
||||||
//! // ...
|
|
||||||
//! }
|
|
||||||
//! ```
|
|
||||||
//!
|
|
||||||
//! Call [init] to initialize logging and [read] to read buffered log data.
|
|
||||||
//!
|
|
||||||
//! # Critical section implementation
|
|
||||||
//!
|
|
||||||
//! This crate uses [`critical-section`](https://github.com/rust-embedded/critical-section) to ensure only one thread
|
|
||||||
//! is writing to the buffer at a time. You must import a crate that provides a `critical-section` implementation
|
|
||||||
//! suitable for the current target. See the `critical-section` README for details.
|
|
||||||
//!
|
|
||||||
//! For example, for single-core privileged-mode Cortex-M targets, you can add the following to your Cargo.toml.
|
|
||||||
//!
|
|
||||||
//! ```toml
|
|
||||||
//! [dependencies]
|
|
||||||
//! cortex-m = { version = "0.7.6", features = ["critical-section-single-core"]}
|
|
||||||
//! ```
|
|
||||||
|
|
||||||
#![no_std]
|
|
||||||
|
|
||||||
use core::{
|
|
||||||
mem::MaybeUninit,
|
|
||||||
sync::atomic::{AtomicBool, Ordering},
|
|
||||||
};
|
|
||||||
|
|
||||||
mod ring_buffer;
|
|
||||||
|
|
||||||
pub use ring_buffer::{RingBuf, RingBuffer};
|
|
||||||
|
|
||||||
#[cfg_attr(feature = "logger", defmt::global_logger)]
|
|
||||||
struct Logger;
|
|
||||||
|
|
||||||
/// Global logger lock.
|
|
||||||
static TAKEN: AtomicBool = AtomicBool::new(false);
|
|
||||||
|
|
||||||
/// Crticial section.
|
|
||||||
static mut CS_RESTORE: critical_section::RestoreState = critical_section::RestoreState::invalid();
|
|
||||||
|
|
||||||
/// Encoder.
|
|
||||||
static mut ENCODER: defmt::Encoder = defmt::Encoder::new();
|
|
||||||
|
|
||||||
/// Ring buffer.
|
|
||||||
static mut RING_BUFFER: Option<&'static mut dyn RingBuf> = None;
|
|
||||||
|
|
||||||
/// Callback when new log data is available.
|
|
||||||
static mut LOG_AVAILABLE: fn() = || ();
|
|
||||||
|
|
||||||
unsafe impl defmt::Logger for Logger {
|
|
||||||
fn acquire() {
|
|
||||||
let restore = unsafe { critical_section::acquire() };
|
|
||||||
if TAKEN.load(Ordering::Relaxed) {
|
|
||||||
panic!("defmt logger taken reentrantly")
|
|
||||||
}
|
|
||||||
TAKEN.store(true, Ordering::Relaxed);
|
|
||||||
unsafe { CS_RESTORE = restore };
|
|
||||||
|
|
||||||
unsafe { ENCODER.start_frame(do_write) }
|
|
||||||
}
|
|
||||||
|
|
||||||
unsafe fn flush() {
|
|
||||||
// Flush is a no-op.
|
|
||||||
}
|
|
||||||
|
|
||||||
unsafe fn release() {
|
|
||||||
ENCODER.end_frame(do_write);
|
|
||||||
|
|
||||||
TAKEN.store(false, Ordering::Relaxed);
|
|
||||||
let restore = CS_RESTORE;
|
|
||||||
critical_section::release(restore);
|
|
||||||
}
|
|
||||||
|
|
||||||
unsafe fn write(bytes: &[u8]) {
|
|
||||||
ENCODER.write(bytes, do_write);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
fn do_write(data: &[u8]) {
|
|
||||||
unsafe {
|
|
||||||
if let Some(buffer) = RING_BUFFER.as_mut() {
|
|
||||||
buffer.write(data);
|
|
||||||
LOG_AVAILABLE();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Initializes logging to a ring buffer.
|
|
||||||
///
|
|
||||||
/// `ring_buffer` specifies the location of the log buffer.
|
|
||||||
/// It is not cleared if it contains vailid data from the previous boot.
|
|
||||||
///
|
|
||||||
/// `log_available` is called when new log messages are available.
|
|
||||||
///
|
|
||||||
/// This must be called exactly once.
|
|
||||||
/// Log messages received before initiailization are discarded.
|
|
||||||
pub unsafe fn init<const SIZE: usize>(
|
|
||||||
ring_buffer: &'static mut MaybeUninit<RingBuffer<SIZE>>,
|
|
||||||
log_available: fn(),
|
|
||||||
) {
|
|
||||||
defmt::assert!(RING_BUFFER.is_none());
|
|
||||||
|
|
||||||
let ring_buffer = RingBuffer::init(ring_buffer);
|
|
||||||
RING_BUFFER = Some(ring_buffer as &mut dyn RingBuf);
|
|
||||||
LOG_AVAILABLE = log_available;
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Reads and removes data from the log buffer.
|
|
||||||
///
|
|
||||||
/// Returns the number of bytes read and whether data was lost.
|
|
||||||
pub fn read(data: &mut [u8]) -> (usize, bool) {
|
|
||||||
unsafe {
|
|
||||||
critical_section::with(|_cs| {
|
|
||||||
if let Some(buffer) = RING_BUFFER.as_mut() {
|
|
||||||
buffer.read(data)
|
|
||||||
} else {
|
|
||||||
(0, false)
|
|
||||||
}
|
|
||||||
})
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
@ -1,155 +0,0 @@
|
||||||
//! Ring buffer.
|
|
||||||
|
|
||||||
use core::{
|
|
||||||
mem::MaybeUninit,
|
|
||||||
ptr::{addr_of, addr_of_mut},
|
|
||||||
sync::atomic::{AtomicBool, AtomicU32, AtomicU8, AtomicUsize, Ordering},
|
|
||||||
};
|
|
||||||
|
|
||||||
use cortex_m::Peripherals;
|
|
||||||
|
|
||||||
/// Ring buffer access methods.
|
|
||||||
pub trait RingBuf {
|
|
||||||
/// Write into the ring buffer.
|
|
||||||
fn write(&mut self, data: &[u8]);
|
|
||||||
|
|
||||||
/// Read from the ring buffer.
|
|
||||||
///
|
|
||||||
/// Returns the number of bytes read and whether data was lost.
|
|
||||||
fn read(&mut self, data: &mut [u8]) -> (usize, bool);
|
|
||||||
}
|
|
||||||
|
|
||||||
/// Ring buffer.
|
|
||||||
#[repr(C)]
|
|
||||||
pub struct RingBuffer<const SIZE: usize> {
|
|
||||||
/// Signature for validity check.
|
|
||||||
signature: AtomicU32,
|
|
||||||
/// Read position.
|
|
||||||
read_pos: AtomicUsize,
|
|
||||||
/// Write position.
|
|
||||||
write_pos: AtomicUsize,
|
|
||||||
/// Unread data overwritten?
|
|
||||||
overwritten: AtomicBool,
|
|
||||||
/// Buffer.
|
|
||||||
buf: [AtomicU8; SIZE],
|
|
||||||
}
|
|
||||||
|
|
||||||
impl<const SIZE: usize> RingBuffer<SIZE> {
|
|
||||||
/// Signature for validity check.
|
|
||||||
const SIGNATURE: u32 = 0xb0ffe300;
|
|
||||||
|
|
||||||
/// Initializes the ring buffer, keeping its data if it appears valid.
|
|
||||||
pub fn init(uninit: &mut MaybeUninit<Self>) -> &mut Self {
|
|
||||||
unsafe {
|
|
||||||
let mut scb = Peripherals::steal().SCB;
|
|
||||||
let ptr = uninit.as_mut_ptr();
|
|
||||||
|
|
||||||
let signature = (addr_of!((*ptr).signature) as *const u32).read_volatile();
|
|
||||||
let mut read_pos = (addr_of!((*ptr).read_pos) as *const usize).read_volatile();
|
|
||||||
let mut write_pos = (addr_of!((*ptr).write_pos) as *const usize).read_volatile();
|
|
||||||
let mut overwritten = (addr_of!((*ptr).overwritten) as *const u8).read_volatile();
|
|
||||||
|
|
||||||
let valid = signature == Self::SIGNATURE
|
|
||||||
&& read_pos < SIZE
|
|
||||||
&& write_pos < SIZE
|
|
||||||
&& (overwritten == 0 || overwritten == 1);
|
|
||||||
|
|
||||||
if !valid {
|
|
||||||
addr_of_mut!((*ptr).signature).write_volatile(AtomicU32::new(0));
|
|
||||||
scb.clean_dcache_by_ref(&(*ptr).signature);
|
|
||||||
|
|
||||||
read_pos = 0;
|
|
||||||
write_pos = 0;
|
|
||||||
overwritten = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
for i in 0..SIZE {
|
|
||||||
let b = if valid { (addr_of!((*ptr).buf[i]) as *const u8).read_volatile() } else { 0 };
|
|
||||||
addr_of_mut!((*ptr).buf[i]).write_volatile(AtomicU8::new(b));
|
|
||||||
}
|
|
||||||
scb.clean_dcache_by_slice(&(*ptr).buf);
|
|
||||||
|
|
||||||
addr_of_mut!((*ptr).read_pos).write_volatile(AtomicUsize::new(read_pos));
|
|
||||||
scb.clean_dcache_by_ref(&(*ptr).read_pos);
|
|
||||||
addr_of_mut!((*ptr).write_pos).write_volatile(AtomicUsize::new(write_pos));
|
|
||||||
scb.clean_dcache_by_ref(&(*ptr).write_pos);
|
|
||||||
addr_of_mut!((*ptr).overwritten).write_volatile(AtomicBool::new(overwritten != 0));
|
|
||||||
scb.clean_dcache_by_ref(&(*ptr).overwritten);
|
|
||||||
addr_of_mut!((*ptr).signature).write_volatile(AtomicU32::new(Self::SIGNATURE));
|
|
||||||
scb.clean_dcache_by_ref(&(*ptr).signature);
|
|
||||||
|
|
||||||
// SAFETY: all fields have been initialized with either default values or their previous contents.
|
|
||||||
uninit.assume_init_mut()
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
impl<const SIZE: usize> RingBuf for RingBuffer<SIZE> {
|
|
||||||
fn write(&mut self, mut data: &[u8]) {
|
|
||||||
let mut scb = unsafe { Peripherals::steal().SCB };
|
|
||||||
|
|
||||||
while !data.is_empty() {
|
|
||||||
// Split data into part that fits remaining buffer.
|
|
||||||
let write_pos = self.write_pos.load(Ordering::SeqCst);
|
|
||||||
let to_end = SIZE - write_pos;
|
|
||||||
let (part, rest) = data.split_at(to_end.min(data.len()));
|
|
||||||
data = rest;
|
|
||||||
|
|
||||||
// Calculate write boundaries.
|
|
||||||
let from = write_pos;
|
|
||||||
let to = write_pos + part.len();
|
|
||||||
|
|
||||||
// Update read position if we overwrite unread data.
|
|
||||||
let read_pos = self.read_pos.load(Ordering::SeqCst);
|
|
||||||
if from < read_pos && to >= read_pos {
|
|
||||||
self.overwritten.store(true, Ordering::SeqCst);
|
|
||||||
|
|
||||||
let mut new_read_pos = to + 1;
|
|
||||||
if new_read_pos >= SIZE {
|
|
||||||
new_read_pos = 0;
|
|
||||||
}
|
|
||||||
self.read_pos.store(new_read_pos, Ordering::SeqCst);
|
|
||||||
scb.clean_dcache_by_ref(&self.read_pos);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Copy.
|
|
||||||
for (dst, src) in self.buf[from..to].iter_mut().zip(part.iter()) {
|
|
||||||
dst.store(*src, Ordering::SeqCst);
|
|
||||||
}
|
|
||||||
scb.clean_dcache_by_slice(&self.buf[from..to]);
|
|
||||||
|
|
||||||
// Update write position.
|
|
||||||
let new_write_pos = if to == SIZE { 0 } else { to };
|
|
||||||
self.write_pos.store(new_write_pos, Ordering::SeqCst);
|
|
||||||
scb.clean_dcache_by_ref(&self.write_pos);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
fn read(&mut self, data: &mut [u8]) -> (usize, bool) {
|
|
||||||
let mut scb = unsafe { Peripherals::steal().SCB };
|
|
||||||
|
|
||||||
let read_pos = self.read_pos.load(Ordering::SeqCst);
|
|
||||||
let write_pos = self.write_pos.load(Ordering::SeqCst);
|
|
||||||
let overwritten = self.overwritten.load(Ordering::SeqCst);
|
|
||||||
|
|
||||||
// Calculate available data.
|
|
||||||
let avail = if read_pos > write_pos { SIZE - read_pos } else { write_pos - read_pos };
|
|
||||||
let n = avail.min(data.len());
|
|
||||||
|
|
||||||
// Copy.
|
|
||||||
let from = read_pos;
|
|
||||||
let to = read_pos + n;
|
|
||||||
for (dst, src) in data[..n].iter_mut().zip(self.buf[from..to].iter()) {
|
|
||||||
*dst = src.load(Ordering::SeqCst);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Update read position and overwritten status.
|
|
||||||
let new_read_pos = if to == SIZE { 0 } else { to };
|
|
||||||
self.read_pos.store(new_read_pos, Ordering::SeqCst);
|
|
||||||
scb.clean_dcache_by_ref(&self.read_pos);
|
|
||||||
self.overwritten.store(false, Ordering::SeqCst);
|
|
||||||
scb.clean_dcache_by_ref(&self.overwritten);
|
|
||||||
|
|
||||||
(n, overwritten)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
Loading…
Reference in a new issue