sam3: Rename src/sam3x8e to src/sam3

This is in preparation for merging sam3 and sam4 code into one
directory.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/sam3/main.c b/src/sam3/main.c
new file mode 100644
index 00000000..dd8445ac
--- /dev/null
+++ b/src/sam3/main.c
@@ -0,0 +1,52 @@
+// Main starting point for SAM3x8e boards.
+//
+// Copyright (C) 2016,2017  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 "sam3x8e.h" // WDT
+#include "sched.h" // sched_main
+
+DECL_CONSTANT(MCU, "sam3x8e");
+
+
+/****************************************************************
+ * watchdog handler
+ ****************************************************************/
+
+void
+watchdog_reset(void)
+{
+    WDT->WDT_CR = 0xA5000001;
+}
+DECL_TASK(watchdog_reset);
+
+void
+watchdog_init(void)
+{
+    uint32_t timeout = 500 * 32768 / 128 / 1000;  // 500ms timeout
+    WDT->WDT_MR = WDT_MR_WDRSTEN | WDT_MR_WDV(timeout) | WDT_MR_WDD(timeout);
+}
+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;
+}