From 66d7958392222213f252c8164c86f0abc65ce24c Mon Sep 17 00:00:00 2001
From: Harald Kube <harald.kube@gmx.de>
Date: Thu, 25 Feb 2021 22:58:52 +0100
Subject: [PATCH] Add build target for RPi which will access the GPIOs if
 build-option --fetaure "rppal" is passed.

---
 .cargo/config.toml |  2 ++
 Cargo.lock         | 45 +++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml         |  2 ++
 src/main.rs        | 14 ++++++++++++--
 4 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 .cargo/config.toml

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..6df6788
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.armv7-unknown-linux-musleabihf]
+linker = "/usr/local/Cellar/arm-linux-gnueabihf-binutils/2.36.1/bin/arm-linux-gnueabihf-ld"
diff --git a/Cargo.lock b/Cargo.lock
index 9521a44..84da9f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -617,6 +617,16 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
 
+[[package]]
+name = "embedded-hal"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa998ce59ec9765d15216393af37a58961ddcefb14c753b4816ba2191d865fcb"
+dependencies = [
+ "nb 0.1.3",
+ "void",
+]
+
 [[package]]
 name = "event-listener"
 version = "2.5.1"
@@ -999,6 +1009,21 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "nb"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
+dependencies = [
+ "nb 1.0.0",
+]
+
+[[package]]
+name = "nb"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
+
 [[package]]
 name = "nb-connect"
 version = "1.0.3"
@@ -1234,6 +1259,19 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56770675ebc04927ded3e60633437841581c285dc6236109ea25fbf3beb7b59e"
 
+[[package]]
+name = "rppal"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "137dbba1fb867daa27cda4c3cd6a11bca5bb5a1551f034cf9319b994846ddbe1"
+dependencies = [
+ "embedded-hal",
+ "lazy_static",
+ "libc",
+ "nb 0.1.3",
+ "void",
+]
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -1264,6 +1302,7 @@ dependencies = [
  "function_name",
  "lazy_static",
  "minreq",
+ "rppal",
  "serde",
  "serde_derive",
  "tide",
@@ -1732,6 +1771,12 @@ version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
 
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
 [[package]]
 name = "waker-fn"
 version = "1.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 168ee4a..7d45637 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,5 +15,7 @@ serde_derive = "1.0"
 function_name = "0.2"
 tide = "0.16"
 
+rppal = { version = "0.11.3", features = ["hal"], optional = true }
+
 lazy_static = "1.4"
 minreq = { version = "2.3", features = ["json-using-serde"] }
diff --git a/src/main.rs b/src/main.rs
index 83b05f4..f6e38f7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,13 +1,15 @@
 #[macro_use]
 extern crate clap;
 
-use async_std::task;
-
 mod cfg_reader;
 mod pulse_counter;
 mod rest_api;
 
+use async_std;
+use async_std::task;
+
 const APP_VERSION: &'static str = env!("CARGO_PKG_VERSION");
+
 const DEFAULT_CONFIG_FILE_NAME: &str = "/etc/s0_logger.cfg";
 
 fn main() {
@@ -32,6 +34,14 @@ fn main() {
         .unwrap_or(DEFAULT_CONFIG_FILE_NAME);
     println!("Read the config from file '{}'", config_file_name);
 
+    if cfg!(feature = "rppal") {
+        println!("Will access GPIO pins");
+    } else if cfg!(feature = "hal") {
+        println!("Will access HAL");
+    } else {
+        println!("Will NOT access GPIO pins");
+    }
+
     let rest_api_config = rest_api::RestApiConfig {
         ip_and_port: String::from("127.0.0.1:8080"),
         get_channels: fake_get_channels,