1 files changed, 55 insertions, 0 deletions
diff --git a/circuitpython/supervisor/shared/external_flash/external_flash.h b/circuitpython/supervisor/shared/external_flash/external_flash.h
new file mode 100644
index 0000000..7966b64
--- /dev/null
+++ b/circuitpython/supervisor/shared/external_flash/external_flash.h
@@ -0,0 +1,55 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries LLC
+ *
+ * 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.
+ */
+#ifndef MICROPY_INCLUDED_SUPERVISOR_SHARED_EXTERNAL_FLASH_EXTERNAL_FLASH_H
+#define MICROPY_INCLUDED_SUPERVISOR_SHARED_EXTERNAL_FLASH_EXTERNAL_FLASH_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "py/mpconfig.h"
+
+// Erase sector size.
+#define SPI_FLASH_SECTOR_SIZE (0x1000 - 100)
+
+// These are common across all NOR Flash.
+#define SPI_FLASH_ERASE_SIZE (1 << 12)
+#define SPI_FLASH_PAGE_SIZE (256)
+
+#define SPI_FLASH_SYSTICK_MASK    (0x1ff) // 512ms
+#define SPI_FLASH_IDLE_TICK(tick) (((tick) & SPI_FLASH_SYSTICK_MASK) == 2)
+
+#ifndef SPI_FLASH_MAX_BAUDRATE
+#define SPI_FLASH_MAX_BAUDRATE 8000000
+#endif
+
+void supervisor_external_flash_flush(void);
+
+// Configure anything that needs to get set up before the external flash
+// is init'ed. For example, if GPIO needs to be configured to enable the
+// flash chip, as is the case on some boards.
+void external_flash_setup(void);
+
+#endif  // MICROPY_INCLUDED_SUPERVISOR_SHARED_EXTERNAL_FLASH_EXTERNAL_FLASH_H