ports: litex: add port and fomu board

This adds support for Litex, along with support for the Fomu FPGA board.

Signed-off-by: Sean Cross <sean@xobs.io>

1 files changed, 60 insertions, 0 deletions

diff --git a/ports/litex/background.c b/ports/litex/background.c
new file mode 100644
index 000000000..8c1897043
--- /dev/null
+++ b/ports/litex/background.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ *
+ * 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.
+ */
+
+#include "py/runtime.h"
+#include "supervisor/filesystem.h"
+#include "supervisor/usb.h"
+#include "supervisor/shared/stack.h"
+
+#if CIRCUITPY_DISPLAYIO
+#include "shared-module/displayio/__init__.h"
+#endif
+
+static bool running_background_tasks = false;
+
+void background_tasks_reset(void) {
+    running_background_tasks = false;
+}
+
+void run_background_tasks(void) {
+    // Don't call ourselves recursively.
+    if (running_background_tasks) {
+        return;
+    }
+    running_background_tasks = true;
+    filesystem_background();
+
+    #if USB_AVAILABLE
+    usb_background();
+    #endif
+
+    #if CIRCUITPY_DISPLAYIO
+    displayio_background();
+    #endif
+    running_background_tasks = false;
+
+    assert_heap_ok();
+}