From 7c3867da33250e5a20d26f64c5a127323c2094cc Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Sat, 6 Apr 2013 22:07:54 +0000 Subject: Added new CONCAT() and CONCAT_EXPANDED() convenience macros. --- LUFA/Drivers/Board/Dataflash.h | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) (limited to 'LUFA/Drivers/Board/Dataflash.h') diff --git a/LUFA/Drivers/Board/Dataflash.h b/LUFA/Drivers/Board/Dataflash.h index e05c4e7c4..cc4aa2ee2 100644 --- a/LUFA/Drivers/Board/Dataflash.h +++ b/LUFA/Drivers/Board/Dataflash.h @@ -70,44 +70,44 @@ * SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING | * SPI_SAMPLE_TRAILING | SPI_MODE_MASTER); * Dataflash_Init(); - * + * * uint8_t WriteBuffer[DATAFLASH_PAGE_SIZE]; * uint8_t ReadBuffer[DATAFLASH_PAGE_SIZE]; - * + * * // Fill page write buffer with a repeating pattern * for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++) * WriteBuffer[i] = (i & 0xFF); - * + * * // Must select the chip of interest first before operating on it * Dataflash_SelectChip(DATAFLASH_CHIP1); - * + * * // Write to the Dataflash's first internal memory buffer * printf("Writing data to first dataflash buffer:\r\n"); * Dataflash_SendByte(DF_CMD_BUFF1WRITE); * Dataflash_SendAddressBytes(0, 0); - * + * * for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++) * Dataflash_SendByte(WriteBuffer[i]); - * + * * // Commit the Dataflash's first memory buffer to the non-volatile FLASH memory * printf("Committing page to non-volatile memory page index 5:\r\n"); * Dataflash_SendByte(DF_CMD_BUFF1TOMAINMEMWITHERASE); * Dataflash_SendAddressBytes(5, 0); * Dataflash_WaitWhileBusy(); - * + * * // Read the page from non-volatile FLASH memory into the Dataflash's second memory buffer * printf("Reading data into second dataflash buffer:\r\n"); * Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF2); * Dataflash_SendAddressBytes(5, 0); * Dataflash_WaitWhileBusy(); - * + * * // Read the Dataflash's second internal memory buffer * Dataflash_SendByte(DF_CMD_BUFF2READ); * Dataflash_SendAddressBytes(0, 0); - * + * * for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++) * ReadBuffer[i] = Dataflash_ReceiveByte(); - * + * * // Deselect the chip after use * Dataflash_DeselectChip(); * \endcode @@ -131,18 +131,16 @@ /* Public Interface - May be used in end-application: */ /* Macros: */ - #if !defined(__DOXYGEN__) - #define __GET_DATAFLASH_MASK2(x, y) x ## y - #define __GET_DATAFLASH_MASK(x) __GET_DATAFLASH_MASK2(DATAFLASH_CHIP,x) - #endif - /** Retrieves the Dataflash chip select mask for the given Dataflash chip index. * - * \param[in] index Index of the dataflash chip mask to retrieve + * \attention This macro will only work correctly on chip index numbers that are compile-time + * constants defined by the preprocessor. + * + * \param[in] index Index of the dataflash chip mask to retrieve. * * \return Mask for the given Dataflash chip's /CS pin */ - #define DATAFLASH_CHIP_MASK(index) __GET_DATAFLASH_MASK(index) + #define DATAFLASH_CHIP_MASK(index) CONCAT_EXPANDED(DATAFLASH_CHIP, index) /* Inline Functions: */ /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC. -- cgit v1.2.3