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This commit is contained in:
Adin Ackerman
parent
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@ -1,5 +1,6 @@
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* xref:getting_started.adoc[Getting started]
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** xref:basic_application.adoc[Basic application]
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** xref:project_structure.adoc[Project Structure]
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* xref:layer_by_layer.adoc[Bare metal to async]
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* xref:runtime.adoc[Executor]
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* xref:hal.adoc[HAL]
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@ -4,87 +4,6 @@ These are a list of unsorted, commonly asked questions and answers.
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Please feel free to add items to link:https://github.com/embassy-rs/embassy/edit/main/docs/modules/ROOT/pages/faq.adoc[this page], especially if someone in the chat answered a question for you!
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== How do I even start?
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There are many ways to configure embassy and it's components for your exact application. The link:https://github.com/embassy-rs/embassy/tree/main/examples[examples] directory for each chipset demonstrate how your project structure should look. Let's break it down:
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The toplevel file structure of your project should look like this:
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[source,plain]
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----
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{} = Maybe
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my-project
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|- .cargo
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| |- config.toml
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|- src
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| |- main.rs
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|- build.rs
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|- Cargo.toml
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|- {memory.x}
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|- rust-toolchain.toml
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----
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=== .cargo/config.toml
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This directory/file describes what platform you're on, and configures link:https://github.com/probe-rs/probe-rs[probe-rs] to deploy to your device.
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Here is a minimal example:
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[source,toml]
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----
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[target.thumbv6m-none-eabi] # <-change for your platform
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runner = 'probe-rs run --chip STM32F031K6Tx' # <- change for your chip
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[build]
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target = "thumbv6m-none-eabi" # <-change for your platform
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[env]
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DEFMT_LOG = "trace" # <- can change to info, warn, or error
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----
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=== build.rs
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This is the build script for your project. It links defmt (what is defmt?) and the `memory.x` file if need be. This file is pretty specific for each chipset, just copy and paste from the corresponding link:https://github.com/embassy-rs/embassy/tree/main/examples[example].
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=== Cargo.toml
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This is your manifest file, where you can configure all of the embassy components to use the features you need.
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TODO: someone should exhaustively describe every feature for every component!
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=== memory.x
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This file outlines the flash/ram usage of your program. It is especially useful when using link:https://github.com/embassy-rs/nrf-softdevice[nrf-softdevice] on an nRF5x.
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Here is an example for using S140 with an nRF52840:
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[source,x]
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----
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MEMORY
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{
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/* NOTE 1 K = 1 KiBi = 1024 bytes */
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/* These values correspond to the NRF52840 with Softdevices S140 7.0.1 */
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FLASH : ORIGIN = 0x00027000, LENGTH = 868K
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RAM : ORIGIN = 0x20020000, LENGTH = 128K
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}
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----
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=== rust-toolchain.toml
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This file configures the rust version and configuration to use.
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A minimal example:
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[source,toml]
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----
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[toolchain]
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channel = "nightly-2023-08-19" # <- as of writing, this is the exact rust version embassy uses
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components = [ "rust-src", "rustfmt" ] # <- optionally add "llvm-tools-preview" for some extra features like "cargo size"
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targets = [
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"thumbv6m-none-eabi" # <-change for your platform
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]
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----
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== How to deploy to RP2040 without a debugging probe.
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Install link:https://github.com/JoNil/elf2uf2-rs[elf2uf2-rs] for converting the generated elf binary into a uf2 file.
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80
docs/modules/ROOT/pages/project_structure.adoc
Normal file
80
docs/modules/ROOT/pages/project_structure.adoc
Normal file
@ -0,0 +1,80 @@
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= Project Structure
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There are many ways to configure embassy and it's components for your exact application. The link:https://github.com/embassy-rs/embassy/tree/main/examples[examples] directory for each chipset demonstrate how your project structure should look. Let's break it down:
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The toplevel file structure of your project should look like this:
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[source,plain]
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----
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{} = Maybe
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my-project
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|- .cargo
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| |- config.toml
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|- src
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| |- main.rs
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|- build.rs
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|- Cargo.toml
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|- {memory.x}
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|- rust-toolchain.toml
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----
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=== .cargo/config.toml
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This directory/file describes what platform you're on, and configures link:https://github.com/probe-rs/probe-rs[probe-rs] to deploy to your device.
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Here is a minimal example:
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[source,toml]
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----
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[target.thumbv6m-none-eabi] # <-change for your platform
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runner = 'probe-rs run --chip STM32F031K6Tx' # <- change for your chip
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[build]
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target = "thumbv6m-none-eabi" # <-change for your platform
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[env]
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DEFMT_LOG = "trace" # <- can change to info, warn, or error
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----
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=== build.rs
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This is the build script for your project. It links defmt (what is defmt?) and the `memory.x` file if need be. This file is pretty specific for each chipset, just copy and paste from the corresponding link:https://github.com/embassy-rs/embassy/tree/main/examples[example].
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=== Cargo.toml
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This is your manifest file, where you can configure all of the embassy components to use the features you need.
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TODO: someone should exhaustively describe every feature for every component!
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=== memory.x
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This file outlines the flash/ram usage of your program. It is especially useful when using link:https://github.com/embassy-rs/nrf-softdevice[nrf-softdevice] on an nRF5x.
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Here is an example for using S140 with an nRF52840:
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[source,x]
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----
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MEMORY
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{
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/* NOTE 1 K = 1 KiBi = 1024 bytes */
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/* These values correspond to the NRF52840 with Softdevices S140 7.0.1 */
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FLASH : ORIGIN = 0x00027000, LENGTH = 868K
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RAM : ORIGIN = 0x20020000, LENGTH = 128K
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}
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----
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=== rust-toolchain.toml
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This file configures the rust version and configuration to use.
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A minimal example:
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[source,toml]
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----
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[toolchain]
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channel = "nightly-2023-08-19" # <- as of writing, this is the exact rust version embassy uses
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components = [ "rust-src", "rustfmt" ] # <- optionally add "llvm-tools-preview" for some extra features like "cargo size"
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targets = [
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"thumbv6m-none-eabi" # <-change for your platform
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]
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----
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