diff options
| author | Dean Camera <dean@fourwalledcubicle.com> | 2009-03-17 04:43:34 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2009-03-17 04:43:34 +0000 |
| commit | d770d98bca4af54b10316d03979bfcdb71ce623d (patch) | |
| tree | 899ba4118bcc9389fb3199b6f67a975dbcf2edb9 /LUFA/DriverStubs | |
| parent | e611b250c170c9e830f8212ca5d49e505e3f4af1 (diff) | |
| download | lufa-d770d98bca4af54b10316d03979bfcdb71ce623d.tar.gz lufa-d770d98bca4af54b10316d03979bfcdb71ce623d.tar.bz2 lufa-d770d98bca4af54b10316d03979bfcdb71ce623d.zip | |
Board Dataflash driver now allows for dataflash ICs which use different shifts for setting the current page/byte address (thanks to Kenneth Clubb).
Diffstat (limited to 'LUFA/DriverStubs')
| -rw-r--r-- | LUFA/DriverStubs/Dataflash.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/LUFA/DriverStubs/Dataflash.h b/LUFA/DriverStubs/Dataflash.h index 0bef94ebb..41581a730 100644 --- a/LUFA/DriverStubs/Dataflash.h +++ b/LUFA/DriverStubs/Dataflash.h @@ -78,4 +78,40 @@ /** Total number of pages inside each of the board's dataflash ICs. */
#define DATAFLASH_PAGES // TODO: Replace with the total number of pages inside one of the Dataflash ICs
+ /* 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;
+
+ // TODO: If more than one dataflash chip, select the correct chip from the page address here
+ 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)
+ {
+ // TODO: If more than one dataflash chip, adjust absolute page address to be correct for the current chip,
+ // also the shifts may need to be altered to suit the dataflash model being used
+ Dataflash_SendByte(PageAddress >> 5);
+ Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
+ Dataflash_SendByte(BufferByte);
+ }
+
#endif
|