application: Define UART0_IRQHandler().

[gps-watch.git] / src / application / uart0.rs

diff --git a/src/application/uart0.rs b/src/application/uart0.rs
new file mode 100644 (file)
index 0000000..2c61b83
--- /dev/null
+++ b/src/application/uart0.rs
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2019 Tilman Sauerbeck (tilman at code-monkey de)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+use common::uart;
+use common::ringbuf::Ringbuf;
+
+extern {
+    static mut uart0_rx_buf : Ringbuf;
+}
+
+#[no_mangle]
+pub unsafe extern fn UART0_IRQHandler() {
+    if let Some(received) = uart::try_read(uart::UART0) {
+        if !uart0_rx_buf.is_full() {
+            uart0_rx_buf.write(received);
+        }
+    }
+}