add circuitpython code

1 files changed, 78 insertions, 0 deletions

diff --git a/circuitpython/supervisor/shared/external_flash/device.h b/circuitpython/supervisor/shared/external_flash/device.h
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+++ b/circuitpython/supervisor/shared/external_flash/device.h
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+/*
+ * 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_DEVICE_H
+#define MICROPY_INCLUDED_SUPERVISOR_SHARED_EXTERNAL_FLASH_DEVICE_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+typedef struct {
+    uint32_t total_size;
+    uint16_t start_up_time_us;
+
+    // Three response bytes to 0x9f JEDEC ID command.
+    uint8_t manufacturer_id;
+    uint8_t memory_type;
+    uint8_t capacity;
+
+    // Max clock speed for all operations and the fastest read mode.
+    uint8_t max_clock_speed_mhz;
+
+    // Bitmask for Quad Enable bit if present. 0x00 otherwise. This is for the highest byte in the
+    // status register.
+    uint8_t quad_enable_bit_mask;
+
+    bool has_sector_protection : 1;
+
+    // Supports the 0x0b fast read command with 8 dummy cycles.
+    bool supports_fast_read : 1;
+
+    // Supports the fast read, quad output command 0x6b with 8 dummy cycles.
+    bool supports_qspi : 1;
+
+    // Supports the quad input page program command 0x32. This is known as 1-1-4 because it only
+    // uses all four lines for data.
+    bool supports_qspi_writes : 1;
+
+    // Requires a separate command 0x31 to write to the second byte of the status register.
+    // Otherwise two byte are written via 0x01.
+    bool write_status_register_split : 1;
+
+    // True when the status register is a single byte. This implies the Quad Enable bit is in the
+    // first byte and the Read Status Register 2 command (0x35) is unsupported.
+    bool single_status_byte : 1;
+
+    // Does not support using a ready bit within the status register
+    bool no_ready_bit : 1;
+
+    // Does not support the erase command (0x20)
+    bool no_erase_cmd : 1;
+
+    // Device does not have a reset command
+    bool no_reset_cmd : 1;
+} external_flash_device;
+
+#endif  // MICROPY_INCLUDED_SUPERVISOR_SHARED_EXTERNAL_FLASH_DEVICE_H