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File: [local] / funnyos / dev / sdmmc / sdmmc.c (download)

Revision 1.2, Fri Dec 21 17:45:26 2007 UTC (16 years, 5 months ago) by nbrk
Branch: MAIN
Changes since 1.1: +2 -2 lines 

another step towards SD/MMC SPI protocol support;
add functions to initialize, read block, read CID, get tokens..
still not completed and not much tested (doesn't work for now).

/*
 * $Id: sdmmc.c,v 1.2 2007/12/21 17:45:26 nbrk Exp $
 */
#include <sys/types.h>
#include <dev/sdmmc/sdmmcvar.h>

struct sdmmc_cmdframe
sdmmc_command(uint8_t cmd, uint32_t arg, uint8_t crc)
{
	/*
	 * Construct command frame and return it.
	 */
	struct sdmmc_cmdframe cmdframe;

	cmdframe.sc_cmd = CMDFRAME_CMD(cmd);
	cmdframe.sc_arg = arg;
	cmdframe.sc_crc = cmd != 0 ? CMDFRAME_CRC(crc) : crc;

	return(cmdframe);
}