mmc.h

来自「本代码是采用ARM7TDMI内核的S3C44BOX芯片硬件测试程序」· C头文件 代码 · 共 65 行

/**************************************************************
 * ARMSYS-P, LiYuTai elec.
 *
 * .h file for mmc functions
 ************************************************************/
#include "../Target/44b.h"
#include "../Target/44blib.h"

#define CLR_SPICLK rPDATF&=~(1<<8);
#define SET_SPICLK rPDATF|=(1<<8); 
#define CLR_SPITXD rPDATF&=~(1<<5);
#define SET_SPITXD rPDATF|=(1<<5);
#define READ_SPIRXD (rPDATF&(1<<7));//for MSB
 
#define mmc_select()     rPDATB &= ~(1<<10);// rPDATE&=0xDF;
#define mmc_deselect()   rPDATB |= (1<<10); // rPDATE|=0x20;

void mcu_io_init_formmc(void)
{
//GPF5:OutputTXD; GPF7:InputRXD;GPF8:CLKoutput;GPE5:Output
	rPCONF&=~((7<<19)|(7<<16)|(7<<10));
    rPCONF|=(1<<19)|(1<<10);
	rPUPF&=0x5f;
	rPCONB &= ~(1<<10);
}

unsigned char spi_byte(unsigned char dat)
{
	int i,tmp,tmptxd, tmprxd=0;

	tmptxd=dat;
		
	for(i=0;i<8;i++)
		{
              CLR_SPICLK;
			  
			if(tmptxd&(0x80>>i))//MSB
			{
				SET_SPITXD;
			}
			else
			{
			    CLR_SPITXD;
			}
			
              tmp=READ_SPIRXD;
	       tmprxd|=tmp>>i;
		
		SET_SPICLK;
		}
	return tmprxd;
}
		
/**************************
 * mmc functions
 *************************/
int mmc_init(void);
int mmc_command(unsigned char, unsigned int, unsigned int );
unsigned char mmc_get_r1(void);
int mmc_get_r2(void);
int mmc_print_card_info(void);
int mmc_read_sector(unsigned long int, unsigned char *);
int mmc_write_sector(unsigned long int, unsigned char *);
unsigned char sdi_byte(unsigned char);
void sdmmc_test(void);