1 files changed, 52 insertions, 0 deletions
diff --git a/src/atsamd/main.c b/src/atsamd/main.c
new file mode 100644
index 00000000..4687fc34
--- /dev/null
+++ b/src/atsamd/main.c
@@ -0,0 +1,52 @@
+// Main starting point for SAMD21 boards
+//
+// Copyright (C) 2018  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "command.h" // DECL_CONSTANT
+#include "samd21.h" // SystemInit
+#include "sched.h" // sched_main
+
+DECL_CONSTANT(MCU, "samd21g");
+
+
+/****************************************************************
+ * watchdog handler
+ ****************************************************************/
+
+void
+watchdog_reset(void)
+{
+    WDT->CLEAR.reg = 0xa5;
+}
+DECL_TASK(watchdog_reset);
+
+void
+watchdog_init(void)
+{
+    WDT->CONFIG.reg = WDT_CONFIG_PER_16K; // 500ms timeout
+    WDT->CTRL.reg = WDT_CTRL_ENABLE;
+}
+DECL_INIT(watchdog_init);
+
+
+/****************************************************************
+ * misc functions
+ ****************************************************************/
+
+void
+command_reset(uint32_t *args)
+{
+    NVIC_SystemReset();
+}
+DECL_COMMAND_FLAGS(command_reset, HF_IN_SHUTDOWN, "reset");
+
+// Main entry point
+int
+main(void)
+{
+    SystemInit();
+    sched_main();
+    return 0;
+}