common: Add the watchdog module.

For now this only lets us disable the COP watchdog.

diff --git a/SConscript.libcommon b/SConscript.libcommon
index 79433bc78b5236e1117654e2e5ca93194d587cb5..e4dd29a4c93c83adff2ceeffe79ea73580bbd2c8 100644 (file)
--- a/SConscript.libcommon
+++ b/SConscript.libcommon
@@ -9,6 +9,7 @@ source_files_rs = [
     'src/common/systick.rs',
     'src/common/port.rs',
     'src/common/gpio.rs',
+    'src/common/watchdog.rs',
     'src/common/crc32.rs',
     'src/common/buffer.rs',
     'src/common/usb_serial.rs',

diff --git a/src/common/lib.rs b/src/common/lib.rs
index 7828fea3224f237605130d4ceae19926009f3dfc..0c179fce0f3469f3cec82ce4226963874c3b4b64 100644 (file)
--- a/src/common/lib.rs
+++ b/src/common/lib.rs
@@ -31,6 +31,7 @@ pub mod clock;
 pub mod systick;
 pub mod port;
 pub mod gpio;
+pub mod watchdog;
 pub mod crc32;
 pub mod buffer;
 pub mod usb_serial;

diff --git a/src/common/watchdog.rs b/src/common/watchdog.rs
new file mode 100644 (file)
index 0000000..981e98a
--- /dev/null
+++ b/src/common/watchdog.rs
@@ -0,0 +1,36 @@
+/*
+ * 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 register;
+
+type Reg32 = register::Register<u32>;
+
+const SIM_COPC: u32 = 0x40048100;
+
+const SIM_COPC_COPT_SHIFT: u32 = 2;
+
+pub fn disable() {
+    let mut copc = Reg32::new(SIM_COPC);
+
+    copc.modify(|v| v & !(3 << SIM_COPC_COPT_SHIFT));
+}