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Board Dataflash driver now allows for dataflash ICs which use different shifts for setting the current page/byte address (thanks to Kenneth Clubb).

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This commit is contained in:
Dean Camera 2009-03-17 04:43:34 +00:00
parent e611b250c1
commit d770d98bca
7 changed files with 181 additions and 64 deletions
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102
LUFA/Drivers/Board/Dataflash.h
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@ -52,21 +52,7 @@
/* Includes: */
#include "../AT90USBXXX/SPI.h"
#include "../../Common/Common.h"
#if !defined(BOARD)
#error BOARD must be set in makefile to a value specified in BoardTypes.h.
#elif (BOARD == BOARD_USBKEY)
#include "USBKEY/Dataflash.h"
#elif (BOARD == BOARD_STK525)
#include "STK525/Dataflash.h"
#elif (BOARD == BOARD_STK526)
#include "STK526/Dataflash.h"
#elif (BOARD == BOARD_USER)
#include "Board/Dataflash.h"
#else
#error The selected board does not contain a dataflash IC.
#endif
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
@ -89,19 +75,6 @@
#define Dataflash_DeselectChip() Dataflash_SelectChip(DATAFLASH_NO_CHIP)
/* Inline Functions: */
/** Initializes the dataflash driver (including the SPI driver) so that commands and data may be
* sent to an attached dataflash IC.
*
* \param PrescalerMask SPI prescaler mask, see SPI.h documentation
*/
static inline void Dataflash_Init(const uint8_t PrescalerMask)
{
DATAFLASH_CHIPCS_DDR |= DATAFLASH_CHIPCS_MASK;
DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
SPI_Init(PrescalerMask, true);
}
/** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
*
* \param Byte of data to send to the dataflash
@ -133,21 +106,45 @@
{
return SPI_ReceiveByte();
}
/* Includes: */
#if !defined(BOARD)
#error BOARD must be set in makefile to a value specified in BoardTypes.h.
#elif (BOARD == BOARD_USBKEY)
#include "USBKEY/Dataflash.h"
#elif (BOARD == BOARD_STK525)
#include "STK525/Dataflash.h"
#elif (BOARD == BOARD_STK526)
#include "STK526/Dataflash.h"
#elif (BOARD == BOARD_USER)
#include "Board/Dataflash.h"
#else
#error The selected board does not contain a dataflash IC.
#endif
/* Inline Functions: */
/** Initializes the dataflash driver (including the SPI driver) so that commands and data may be
* sent to an attached dataflash IC.
*
* \param PrescalerMask SPI prescaler mask, see SPI.h documentation
*/
static inline void Dataflash_Init(const uint8_t PrescalerMask)
{
DATAFLASH_CHIPCS_DDR |= DATAFLASH_CHIPCS_MASK;
DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
SPI_Init(PrescalerMask, true);
}
/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
* a new command.
*/
static inline void Dataflash_ToggleSelectedChipCS(void)
{
#if (DATAFLASH_TOTALCHIPS == 2)
uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
Dataflash_DeselectChip();
Dataflash_SelectChip(SelectedChipMask);
#else
Dataflash_DeselectChip();
Dataflash_SelectChip(DATAFLASH_CHIP1);
#endif
Dataflash_DeselectChip();
Dataflash_SelectChip(SelectedChipMask);
}
/** Spinloops while the currently selected dataflash is busy executing a command, such as a main
@ -162,28 +159,14 @@
/** Selects a dataflash IC from the given page number, which should range from 0 to
* ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
* dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside the total number
* of pages contained in the boards dataflash ICs, all dataflash ICs are deselected.
* dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside
* the total number of pages contained in the boards dataflash ICs, all dataflash ICs
* are deselected.
*
* \param PageAddress Address of the page to manipulate, ranging from
* ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
*/
static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress)
{
Dataflash_DeselectChip();
if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS))
return;
#if (DATAFLASH_TOTALCHIPS == 2)
if (PageAddress & 0x01)
Dataflash_SelectChip(DATAFLASH_CHIP2);
else
Dataflash_SelectChip(DATAFLASH_CHIP1);
#else
Dataflash_SelectChip(DATAFLASH_CHIP1);
#endif
}
static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress);
/** 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.
@ -191,16 +174,7 @@
* \param PageAddress Page address within the selected dataflash IC
* \param BufferByte Address within the dataflash's buffer
*/
static inline void Dataflash_SendAddressBytes(uint16_t PageAddress, const uint16_t BufferByte)
{
#if (DATAFLASH_TOTALCHIPS == 2)
PageAddress >>= 1;
#endif
Dataflash_SendByte(PageAddress >> 5);
Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
Dataflash_SendByte(BufferByte);
}
static inline void Dataflash_SendAddressBytes(uint16_t PageAddress, const uint16_t BufferByte);
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)