Parse command line arguments.

All available parameters can be passed as arguments with clap.  Port,
baud rate, char size, parity, stop bits and flow control can now be
specified.

Cargo.lock

@@ -6,6 +6,61 @@ version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "afddf7f520a80dbf76e6f50a35bca42a2331ef227a28b3b6dc5c2e2338d114b1"
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "bitflags"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+
+[[package]]
+name = "clap"
+version = "3.0.0-beta.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4bd1061998a501ee7d4b6d449020df3266ca3124b941ec56cf2005c3779ca142"
+dependencies = [
+ "atty",
+ "bitflags",
+ "clap_derive",
+ "indexmap",
+ "lazy_static",
+ "os_str_bytes",
+ "strsim",
+ "termcolor",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
+[[package]]
+name = "clap_derive"
+version = "3.0.0-beta.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "370f715b81112975b1b69db93e0b56ea4cd4e5002ac43b2da8474106a54096a1"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "embedded-hal"
 version = "0.2.4"
@@ -16,6 +71,40 @@ dependencies = [
  "void",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
+
+[[package]]
+name = "heck"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "322f4de77956e22ed0e5032c359a0f1273f1f7f0d79bfa3b8ffbc730d7fbcc5c"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb1fa934250de4de8aef298d81c729a7d33d8c239daa3a7575e6b92bfc7313b"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
 [[package]]
 name = "ioctl-rs"
 version = "0.1.6"
@@ -25,6 +114,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.86"
@@ -46,6 +141,54 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
 
+[[package]]
+name = "os_str_bytes"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afb2e1c3ee07430c2cf76151675e583e0f19985fa6efae47d6848a3e2c824f85"
+
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "991431c3519a3f36861882da93630ce66b52918dcf1b8e2fd66b397fc96f28df"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "serial"
 version = "0.4.0"
@@ -114,10 +257,37 @@ name = "spidrs"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "clap",
  "serial-embedded-hal",
  "spidriver",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
+[[package]]
+name = "syn"
+version = "1.0.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c700597eca8a5a762beb35753ef6b94df201c81cca676604f547495a0d7f0081"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "termios"
 version = "0.2.2"
@@ -127,8 +297,78 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "203008d98caf094106cfaba70acfed15e18ed3ddb7d94e49baec153a2b462789"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
+[[package]]
+name = "version_check"
+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 = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -3,8 +3,10 @@ name = "spidrs"
 version = "0.1.0"
 authors = ["finga <finga@onders.org>"]
 edition = "2018"
+description = "A small cli program for spidriver."
 
 [dependencies]
 anyhow = "1.0"
 serial-embedded-hal = "0.1"
 spidriver = "0.1"
+clap = "3.0.0-beta.2"

src/main.rs

@@ -1,23 +1,65 @@
 use anyhow::Result;
+use clap::{crate_authors, crate_description, crate_name, crate_version, Clap};
 use serial_embedded_hal::{PortSettings, Serial};
 use spidriver::SPIDriver;
 
 use std::io;
 
+#[derive(Clap)]
+#[clap(name = crate_name!(), version = crate_version!(),
+       author = crate_authors!(","), about = crate_description!())]
+struct Opts {
+    #[clap(short, long, default_value = "/dev/ttyUSB0")]
+    port: String,
+    #[clap(short, long, default_value = "460800")]
+    baud_rate: usize,
+    #[clap(short, long, default_value = "8", possible_values = &["5", "6", "7", "8"])]
+    char_size: u8,
+    #[clap(short = 'P', long, default_value = "none", possible_values = &["none", "odd", "even"])]
+    parity: String,
+    #[clap(short, long, default_value = "1", possible_values = &["1", "2"])]
+    stop_bits: u8,
+    #[clap(short, long, default_value = "none", possible_values = &["none", "software", "hardware"])]
+    flow_control: String,
+}
+
 fn main() -> Result<()> {
+    let opts: Opts = Opts::parse();
+
     let port = Serial::new(
-        "/dev/ttyUSB0",
+        &opts.port,
         &PortSettings {
-            baud_rate: serial_embedded_hal::BaudRate::BaudOther(460800),
+            baud_rate: serial_embedded_hal::BaudRate::BaudOther(opts.baud_rate),
-            char_size: serial_embedded_hal::CharSize::Bits8,
+            char_size: match opts.char_size {
-            parity: serial_embedded_hal::Parity::ParityNone,
+                5 => serial_embedded_hal::CharSize::Bits5,
-            stop_bits: serial_embedded_hal::StopBits::Stop1,
+                6 => serial_embedded_hal::CharSize::Bits6,
-            flow_control: serial_embedded_hal::FlowControl::FlowNone,
+                7 => serial_embedded_hal::CharSize::Bits7,
+                8 => serial_embedded_hal::CharSize::Bits8,
+                _ => unreachable!(),
+            },
+            parity: match opts.parity.as_str() {
+                "none" => serial_embedded_hal::Parity::ParityNone,
+                "odd" => serial_embedded_hal::Parity::ParityOdd,
+                "even" => serial_embedded_hal::Parity::ParityEven,
+                _ => unreachable!(),
+            },
+            stop_bits: match opts.stop_bits {
+                1 => serial_embedded_hal::StopBits::Stop1,
+                2 => serial_embedded_hal::StopBits::Stop2,
+                _ => unreachable!(),
+            },
+            flow_control: match opts.flow_control.as_str() {
+                "none" => serial_embedded_hal::FlowControl::FlowNone,
+                "software" => serial_embedded_hal::FlowControl::FlowSoftware,
+                "hardware" => serial_embedded_hal::FlowControl::FlowHardware,
+                _ => unreachable!(),
+            },
         },
     )?;
 
     let (tx, rx) = port.split();
     let mut spidriver = SPIDriver::new(tx, rx);
+
     loop {
         let mut input = String::new();
         io::stdin().read_line(&mut input)?;