/*
LUFA Library
- Copyright (C) Dean Camera, 2011.
+ Copyright (C) Dean Camera, 2015.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2015 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
- The author disclaim all warranties with regard to this
+ The author disclaims all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
*
* Board specific Dataflash driver header for the Atmel USBKEY board.
*
+ * <table>
+ * <tr><th>Name</th><th>Info</th><th>Select Pin</th><th>SPI Port</th></tr>
+ * <tr><td>DATAFLASH_CHIP1</td><td>AT45DB642D (8MB)</td><td>PORTE.0</td><td>SPI0</td></tr>
+ * <tr><td>DATAFLASH_CHIP2</td><td>AT45DB642D (8MB)</td><td>PORTE.1</td><td>SPI0</td></tr>
+ * </table>
+ *
* @{
*/
/* Includes: */
#include "../../../../Common/Common.h"
#include "../../../Misc/AT45DB642D.h"
+ #include "../../../Peripheral/SPI.h"
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_DATAFLASH_H)
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Macros: */
- #define DATAFLASH_CHIPCS_MASK ((1 << 1) | (1 << 0))
+ #define DATAFLASH_CHIPCS_MASK (DATAFLASH_CHIP1 | DATAFLASH_CHIP2)
#define DATAFLASH_CHIPCS_DDR DDRE
#define DATAFLASH_CHIPCS_PORT PORTE
#endif
#define DATAFLASH_TOTALCHIPS 2
/** Mask for no dataflash chip selected. */
- #define DATAFLASH_NO_CHIP DATAFLASH_CHIPCS_MASK
+ #define DATAFLASH_NO_CHIP 0
/** Mask for the first dataflash chip selected. */
- #define DATAFLASH_CHIP1 (1 << 1)
+ #define DATAFLASH_CHIP1 (1 << 0)
/** Mask for the second dataflash chip selected. */
- #define DATAFLASH_CHIP2 (1 << 0)
+ #define DATAFLASH_CHIP2 (1 << 1)
/** Internal main memory page size for the board's dataflash ICs. */
#define DATAFLASH_PAGE_SIZE 1024
/* Inline Functions: */
/** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
- * The microcontroller's SPI driver MUST be initialized before any of the dataflash commands are used.
+ * The appropriate SPI interface will be automatically configured.
*/
static inline void Dataflash_Init(void)
{
DATAFLASH_CHIPCS_DDR |= DATAFLASH_CHIPCS_MASK;
DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
+
+ SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
+ }
+
+ /** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
+ *
+ * \param[in] Byte Byte of data to send to the dataflash
+ *
+ * \return Last response byte from the dataflash
+ */
+ static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+ static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
+ {
+ return SPI_TransferByte(Byte);
+ }
+
+ /** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
+ *
+ * \param[in] Byte Byte of data to send to the dataflash
+ */
+ static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+ static inline void Dataflash_SendByte(const uint8_t Byte)
+ {
+ SPI_SendByte(Byte);
+ }
+
+ /** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
+ *
+ * \return Last response byte from the dataflash
+ */
+ static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+ static inline uint8_t Dataflash_ReceiveByte(void)
+ {
+ return SPI_ReceiveByte();
}
/** Determines the currently selected dataflash chip.
*
* \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
- * or a DATAFLASH_CHIPn mask (where n is the chip number).
+ * or a DATAFLASH_CHIPn mask (where n is the chip number).
*/
static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
static inline uint8_t Dataflash_GetSelectedChip(void)
{
- return (DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK);
+ return (~DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK);
}
/** Selects the given dataflash chip.
*
- * \param[in] ChipMask Mask of the Dataflash IC to select, in the form of DATAFLASH_CHIPn mask (where n is
+ * \param[in] ChipMask Mask of the Dataflash IC to select, in the form of a \c DATAFLASH_CHIPn mask (where n is
* the chip number).
*/
static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE;
static inline void Dataflash_SelectChip(const uint8_t ChipMask)
{
- DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT & ~DATAFLASH_CHIPCS_MASK) | ChipMask);
+ DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT | DATAFLASH_CHIPCS_MASK) & ~ChipMask);
}
/** Deselects the current dataflash chip, so that no dataflash is selected. */
* are deselected.
*
* \param[in] PageAddress Address of the page to manipulate, ranging from
- * ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
+ * 0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
*/
static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress)
{
if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS))
return;
- if (PageAddress & 0x01)
- Dataflash_SelectChip(DATAFLASH_CHIP2);
- else
- Dataflash_SelectChip(DATAFLASH_CHIP1);
+ #if (DATAFLASH_TOTALCHIPS == 2)
+ if (PageAddress & 0x01)
+ Dataflash_SelectChip(DATAFLASH_CHIP2);
+ else
+ Dataflash_SelectChip(DATAFLASH_CHIP1);
+ #else
+ Dataflash_SelectChip(DATAFLASH_CHIP1);
+ #endif
}
/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
}
/** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
- * dataflash commands which require a complete 24-byte address.
+ * dataflash commands which require a complete 24-bit address.
*
* \param[in] PageAddress Page address within the selected dataflash IC
* \param[in] BufferByte Address within the dataflash's buffer
static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
const uint16_t BufferByte)
{
- PageAddress >>= 1;
+ #if (DATAFLASH_TOTALCHIPS == 2)
+ PageAddress >>= 1;
+ #endif
Dataflash_SendByte(PageAddress >> 5);
Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
projects / pub / USBasp.git / blobdiff