From 37a60e2d14857c582ad5770a936c6a5647ea2b9e Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sun, 26 Aug 2018 22:03:10 +0200
Subject: Add initial code

---
 src/main.rs | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 src/main.rs

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..9073975
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,111 @@
+// Copyright 2018 Matthias P. Braendli
+// SPDX-License-Identifier: GPL-2.0-only
+extern crate libc;
+
+extern crate raspi_rfm95_kiss;
+use raspi_rfm95_kiss::rfm95::{RF95, Bandwidth, CodingRate, SpreadingFactor};
+use std::fs::{OpenOptions, File};
+use std::ffi::{CStr, CString};
+use std::os::unix::io::AsRawFd;
+
+const MAX_MTU: usize = 251;
+
+extern {
+    fn kissattach(
+        callsign: * const libc::c_char,
+        speed: libc::int32_t,
+        mtu: libc::int32_t,
+        kttyname: * const libc::c_char,
+        allow_broadcast: libc::int32_t) -> libc::int32_t;
+}
+
+fn create_pts_pair() -> std::io::Result<File> {
+    let master_file = OpenOptions::new()
+        .read(true)
+        .write(true)
+        .open("/dev/ptmx")?;
+
+    unsafe {
+        let master_fd = master_file.as_raw_fd();
+        if libc::grantpt(master_fd) == -1 {
+            return Err(std::io::Error::last_os_error());
+        }
+        if libc::unlockpt(master_fd) == -1 {
+            return Err(std::io::Error::last_os_error());
+        }
+    }
+
+    Ok(master_file)
+}
+
+fn main() {
+    println!("Creating PTY pair");
+
+    let master_file = match create_pts_pair() {
+        Ok(fd) => fd,
+        Err(e) => panic!("create_pts_pair failed: {}", e)
+    };
+
+    let slavename;
+    unsafe {
+        slavename = libc::ptsname(master_file.as_raw_fd());
+    }
+
+    if slavename.is_null() {
+        panic!("Cannot get PTS slave name");
+    }
+    unsafe {
+        let slice = CStr::from_ptr(slavename);
+        println!("PTS slave: {:?}", slice);
+    }
+
+    match RF95::new(Bandwidth::Bw250, CodingRate::Cr8, SpreadingFactor::Sf10) {
+        Ok(mut radio) => {
+            radio.reset().expect("radio reset");
+
+            if let Ok(ver) = radio.get_version() {
+                println!("Device version: {:02x}", ver);
+            }
+            else {
+                println!("Cannot read device version");
+            }
+        },
+        Err(e) => panic!("Cannot create lora radio object, {}", e)
+    };
+
+    let callsign = CString::new("HB9EGM-1").expect("Failed to convert callsign to CString");
+    let speed : i32 = 9600;
+    let mtu : i32 = 251;
+    let allow_broadcast : i32 = 1;
+
+    let success = unsafe {
+        kissattach(
+            callsign.as_ptr(),
+            speed,
+            mtu,
+            slavename,
+            allow_broadcast)
+    };
+
+    if success == 0 {
+        panic!("kissattach failed");
+    }
+
+    let todo = "Read/Write from/to TTY and RFM95";
+
+    /*
+    let master_tty = Box::new(master_file);
+
+    let writer = thread::spawn(|| {
+        loop {
+            let mut buffer = [0; MAX_MTU];
+            match *master_tty.read(&mut buffer[..]) {
+                Ok(n) => radio.write_buffer(buffer),
+                Err(e) => panic!("TTY Read error {}", e);
+            }
+        }
+    });
+
+    writer.join().unwrap();
+    */
+}
-- 
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