rt-thread-official/bsp/efm32/drv_sdcard.h

/***************************************************************************//**
 * @file 	drv_sdcard.h
 * @brief 	Memory card driver (SPI mode) of RT-Thread RTOS for using EFM32
 *  USART module
 *  COPYRIGHT (C) 2012, RT-Thread Development Team
 * @author 	onelife
 * @version 1.0
 *******************************************************************************
 * @section License
 * The license and distribution terms for this file may be found in the file
 *  LICENSE in this distribution or at http://www.rt-thread.org/license/LICENSE
 *******************************************************************************
 * @section Change Logs
 * Date			Author		Notes
 * 2011-05-13	onelife		Initial creation for using EFM32 USART module
 * 2011-07-07	onelife		Modify initialization function to return error code
 ******************************************************************************/
#ifndef __DEV_SDCARD_H__
#define __DEV_SDCARD_H__

/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
#define EFM32_SDCLK_LOW         (100000)
#if defined(EFM32_GXXX_DK)
#define EFM32_SDCLK_HIGH        (16000000)
#elif defined(EFM32GG_DK3750)
#define EFM32_SDCLK_HIGH        (19000000)
#endif

#if (EFM32_SDCLK_HIGH > (EFM32_HFXO_FREQUENCY/2))
#error "EFM32 SPI clock should not be more than (EFM32_HFXO_FREQUENCY/2)"
#endif

#define SD_SPEED_LOW 			(0)
#define SD_SPEED_HIGH 			(1)
#define SD_WAIT_PERIOD 			(RT_TICK_PER_SECOND)

#define SD_SECTOR_SIZE_SHIFT	(9)
#define SD_SECTOR_SIZE 			(1 << SD_SECTOR_SIZE_SHIFT)
#define SD_BLOCK_SIZE_CSD 		(16)
#define SD_BLOCK_SIZE_CID 		(16)
#define SD_BLOCK_SIZE_OCR 		(4)
#define SD_BLOCK_SIZE_SDSTAT 	(64)

/* Card type definitions (CardType) */
#define CT_MMC					(0x01)
#define CT_SD1					(0x02)
#define CT_SD2					(0x04)
#define CT_SDC					(CT_SD1|CT_SD2)
#define CT_BLOCK				(0x08)

/* Definitions for MMC/SDC command */
#define CMD0 					(0) 		/* GO_IDLE_STATE */
#define CMD1 					(1) 		/* SEND_OP_COND */
#define ACMD41 					(41|0x80) 	/* SEND_OP_COND (SDC) */
#define CMD8 					(8) 		/* SEND_IF_COND */
#define CMD9 					(9) 		/* SEND_CSD */
#define CMD10 					(10) 		/* SEND_CID */
#define CMD12 					(12) 		/* STOP_TRANSMISSION */
#define ACMD13 					(13|0x80) 	/* SD_STATUS (SDC) */
#define CMD16 					(16) 		/* SET_BLOCKLEN */
#define CMD17 					(17) 		/* READ_SINGLE_BLOCK */
#define CMD18 					(18) 		/* READ_MULTIPLE_BLOCK */
#define CMD23 					(23) 		/* SET_BLOCK_COUNT */
#define ACMD23 					(23|0x80) 	/* SET_WR_BLK_ERASE_COUNT (SDC) */
#define CMD24 					(24) 		/* WRITE_BLOCK */
#define CMD25 					(25) 		/* WRITE_MULTIPLE_BLOCK */
#define CMD41 					(41) 		/* SEND_OP_COND (ACMD) */
#define CMD55 					(55) 		/* APP_CMD */
#define CMD58 					(58) 		/* READ_OCR */

/* Exported functions ------------------------------------------------------- */
rt_err_t efm_spiSd_init(void);
void efm_spiSd_deinit(void);

#endif /* __DEV_SDCARD_H__ */