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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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38
LUFA/Drivers/Board/USBKEY/Dataflash.h
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@ -74,5 +74,43 @@
/** Total number of pages inside each of the board's dataflash ICs. */
#define DATAFLASH_PAGES 8192
/* Inline Functions: */
/** 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.
*
* \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 (PageAddress & 0x01)
Dataflash_SelectChip(DATAFLASH_CHIP2);
else
Dataflash_SelectChip(DATAFLASH_CHIP1);
}
/** 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.
*
* \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)
{
PageAddress >>= 1;
Dataflash_SendByte(PageAddress >> 5);
Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
Dataflash_SendByte(BufferByte);
}
#endif