/*------------------------------------------------------------------------*/
/* LPCXpresso176x: MMCv3/SDv1/SDv2 (SPI mode) control module */
/*------------------------------------------------------------------------*/
/*
/ Copyright (C) 2011, ChaN, all right reserved.
/
/ * This software is a free software and there is NO WARRANTY.
/ * No restriction on use. You can use, modify and redistribute it for
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice.
/
/-------------------------------------------------------------------------*/
#include "LPC11xx.h"
#include "diskio.h"
#include "sspAdr.h"
#include "spi.h"
#define SSP_CH0/* SSP channel to use (0:SSP0, 1:SSP1) */
#defineCCLK100000000UL/* cclk frequency [Hz] */
#define PCLK_SSP50000000UL/* PCLK frequency for SSP [Hz] */
#define SCLK_FAST25000000UL/* SCLK frequency under normal operation [Hz] */
#defineSCLK_SLOW400000UL/* SCLK frequency under initialization [Hz] */
BYTE INS = 1;
//#defineINS(!(FIO2PIN1 & _BV(1)))/* Socket status (true:Inserted, false:Empty) */
#defineWP0 /* Card write protection (true:yes, false:no) */
#define CS (1<<8)
#if SSP_CH == 0
#defineSSPxDRSSP_SSP0DR
#defineSSPxSRSSP_SSP0SR
#defineSSPxCR0SSP_SSP0CR0
#defineSSPxCR1SSP_SSP0CR1
#defineSSPxCPSRSSP_SSP0CPSR
#defineCS_LOW(){LPC_GPIO2->MASKED_ACCESS[CS] = ~0;}
#defineCS_HIGH(){LPC_GPIO2->MASKED_ACCESS[CS] = 0;}
//#define PCSSPxPCSSP0
//#definePCLKSSPxPCLK_SSP0
#elif SSP_CH == 1
#defineSSPxDRSSP_SSP1DR
#defineSSPxSRSSP_SSP1SR
#defineSSPxCR0SSP_SSP1CR0
#defineSSPxCR1SSP_SSP1CR1
#defineSSPxCPSRSSP_SSP1CPSR
#defineCS_LOW(){LPC_GPIO2->MASKED_ACCESS[CS] = ~0;}
#defineCS_HIGH(){LPC_GPIO2->MASKED_ACCESS[CS] = 0;}
//#define PCSSPxPCSSP1
//#definePCLKSSPxPCLK_SSP1
#endif
#if PCLK_SSP * 1 == CCLK
#define PCLKDIV_SSPPCLKDIV_1
#elif PCLK_SSP * 2 == CCLK
#define PCLKDIV_SSPPCLKDIV_2
#elif PCLK_SSP * 4 == CCLK
#define PCLKDIV_SSPPCLKDIV_4
#elif PCLK_SSP * 8 == CCLK
#define PCLKDIV_SSPPCLKDIV_8
#else
#error Invalid clock frequency.
#endif
//#define FCLK_FAST() { SSPxCPSR = (PCLK_SSP / SCLK_FAST) & ~1; }
//#define FCLK_SLOW() { SSPxCPSR = (PCLK_SSP / SCLK_SLOW) & ~1; }
static void FCLK_SLOW()
{
/* Divide by 5 (SSPCLKDIV also enables to SSP CLK) */
SCB_SSP1CLKDIV = SCB_SSP1CLKDIV_DIV5;
/* (PCLK / (CPSDVSR * [SCR+1])) = (7,200,000 / (2 x [8 + 1])) = 400 KHz */
uint32_t configReg = ( SSP_SSP1CR0_DSS_8BIT // Data size = 8-bit
| SSP_SSP1CR0_FRF_SPI // Frame format = SPI
| SSP_SSP1CR0_SCR_8); // Serial clock rate = 8
// Set clock polarity (low between frames)
// configReg &= ~SSP_SSP1CR0_CPOL_MASK;
// configReg |= SSP_SSP1CR0_CPOL_LOW;
// Set edge transition (leading edge)
// configReg &= ~SSP_SSP1CR0_CPHA_MASK;
// configReg |= SSP_SSP1CR0_CPHA_FIRST;
// Assign config values to SSP1CR0
SSP_SSP1CR0 = configReg;
/* Clock prescale register must be even and at least 2 in master mode */
SSP_SSP1CPSR = SSP_SSP1CPSR_CPSDVSR_DIV2;
}
/**************************************************************************/
/*!
Set SSP clock to fast mode
*/
/**************************************************************************/
static void FCLK_FAST()
{
/* Divide by 1 (SSPCLKDIV also enables to SSP CLK) */
SCB_SSP1CLKDIV = SCB_SSP1CLKDIV_DIV1;
/* (PCLK / (CPSDVSR * [SCR+1])) = (36,000,000 / (2 x [8 + 1])) = 2.0 MHz */
uint32_t configReg = ( SSP_SSP1CR0_DSS_8BIT // Data size = 8-bit
| SSP_SSP1CR0_FRF_SPI // Frame format = SPI
| SSP_SSP1CR0_SCR_8); // Serial clock rate = 8
// Set clock polarity (low between frames)
// configReg &= ~SSP_SSP1CR0_CPOL_MASK;
// configReg |= SSP_SSP1CR0_CPOL_LOW;
// Set edge transition (leading edge)
// configReg &= ~SSP_SSP1CR0_CPHA_MASK;
// configReg |= SSP_SSP1CR0_CPHA_FIRST;
// Assign config values to SSP1CR0
SSP_SSP1CR0 = configReg;
/* Clock prescale register must be even and at least 2 in master mode */
SSP_SSP1CPSR = SSP_SSP1CPSR_CPSDVSR_DIV2;
}
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/* MMC/SD command */
#define CMD0(0)/* GO_IDLE_STATE */
#define CMD1(1)/* SEND_OP_COND (MMC) */
#defineACMD41(0x80+41)/* 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(0x80+13)/* 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 (MMC) */
#defineACMD23(0x80+23)/* SET_WR_BLK_ERASE_COUNT (SDC) */
#define CMD24(24)/* WRITE_BLOCK */
#define CMD25(25)/* WRITE_MULTIPLE_BLOCK */
#define CMD32(32)/* ERASE_ER_BLK_START */
#define CMD33(33)/* ERASE_ER_BLK_END */
#define CMD38(38)/* ERASE */
#define CMD55(55)/* APP_CMD */
#define CMD58(58)/* READ_OCR */
static volatile
DSTATUS Stat = STA_NOINIT;/* Physical drive status */
static volatile
UINT Timer1, Timer2;/* 1kHz decrement timer stopped at zero (disk_timerproc()) */
static
BYTE CardType;/* Card type flags */
/* Card type flags (CardType) */
#define CT_MMC0x01/* MMC ver 3 */
#define CT_SD10x02/* SD ver 1 */
#define CT_SD20x04/* SD ver 2 */
#define CT_SDC(CT_SD1|CT_SD2)/* SD */
#define CT_BLOCK0x08/* Block addressing */
DWORD get_fattime(void)
{
return 0;
}
/*-----------------------------------------------------------------------*/
/* Send/Receive data to the MMC (Platform dependent) */
/*-----------------------------------------------------------------------*/
/* Exchange a byte */
static
BYTE xchg_spi (
BYTE dat/* Data to send */
)
{
SSPxDR = dat;
while (SSPxSR & 0x10) ;
return SSPxDR;
}
/* Receive multiple byte */
static
void rcvr_spi_multi (
BYTE *buff,/* Pointer to data buffer */
UINT btr/* Number of bytes to receive (16, 64 or 512) */
)
{
UINT n = 512;
WORD d;
SSPxCR0 = 0x000F;/* Select 16-bit mode */
for (n = 0; n < 8; n++)/* Push 8 frames into pipeline */
SSPxDR = 0xFFFF;
btr -= 16;
while (btr) {/* Receive the data block into buffer */
while (!(SSPxSR & (1<<2))) ;
d = SSPxDR;
SSPxDR = 0xFFFF;
*buff++ = d >> 8;
*buff++ = d;
btr -= 2;
}
for (n = 0; n < 8; n++) {/* Pop remaining frames from pipeline */
while (!(SSPxSR & (1<<2))) ;
d = SSPxDR;
*buff++ = d >> 8;
*buff++ = d;
}
SSPxCR0 = 0x0007;/* Select 8-bit mode */
}
//#if _USE_WRITE
/* Send multiple byte */
static
void xmit_spi_multi (
const BYTE *buff,/* Pointer to the data */
UINT btx/* Number of bytes to send (512) */
)
{
UINT n = 512;
WORD d;
SSPxCR0 = 0x000F;/* Select 16-bit mode */
for (n = 0; n < 8; n++) {/* Push 8 frames into pipeline */
d = *buff++;
d = (d << 8) | *buff++;
SSPxDR = d;
}
btx -= 16;
do {/* Transmit data block */
d = *buff++;
d = (d << 8) | *buff++;
while (!(SSPxSR & (1<<2))) ;
SSPxDR; SSPxDR = d;
} while (btx -= 2);
for (n = 0; n < 8; n++) {
while (!(SSPxSR & (1<<2))) ;
SSPxDR;
}
SSPxCR0 = 0x0007;/* Select 8-bit mode */
}
//#endif
/*-----------------------------------------------------------------------*/
/* Wait for card ready */
/*-----------------------------------------------------------------------*/
static
int wait_ready (/* 1:Ready, 0:Timeout */
UINT wt/* Timeout [ms] */
)
{
BYTE d;
Timer2 = wt;
do {
d = xchg_spi(0xFF);
/* This loop takes a time. Insert rot_rdq() here for multitask envilonment. */
} while (d != 0xFF && Timer2);/* Wait for card goes ready or timeout */
return (d == 0xFF) ? 1 : 0;
}
/*-----------------------------------------------------------------------*/
/* Deselect card and release SPI */
/*-----------------------------------------------------------------------*/
static
void deselect (void)
{
CS_HIGH();/* CS = H */
xchg_spi(0xFF);/* Dummy clock (force DO hi-z for multiple slave SPI) */
}
/*-----------------------------------------------------------------------*/
/* Select card and wait for ready */
/*-----------------------------------------------------------------------*/
static
int select (void)/* 1:OK, 0:Timeout */
{
CS_LOW();
xchg_spi(0xFF);/* Dummy clock (force DO enabled) */
if (wait_ready(500)) return 1;/* OK */
deselect();
return 0;/* Timeout */
}
/*-----------------------------------------------------------------------*/
/* Control SPI module (Platform dependent) */
/*-----------------------------------------------------------------------*/
static
void power_on (void)/* Enable SSP module and attach it to I/O pads */
{/*
__set_PCONP(PCSSPx, 1);// Enable SSP module
__set_PCLKSEL(PCLKSSPx, PCLKDIV_SSP);// Select PCLK frequency for SSP
SSPxCR0 = 0x0007;// Set mode: SPI mode 0, 8-bit
SSPxCR1 = 0x2;// Enable SSP with Master
#if SSP_CH == 0
__set_PINSEL(0, 15, 2);// Attach SCK0 to I/O pad
__set_PINSEL(0, 16, 2);// Attach MISO0 to I/O pad
__set_PINSEL(0, 17, 2);// Attach MOSI0 to I/O pad
FIO0DIR |= _BV(18);// Set CS# as output
#elif SSP_CH == 1
__set_PINSEL(0, 7, 2);// Attach SCK1 to I/O pad
__set_PINSEL(0, 8, 2);// Attach MISO1 to I/O pad
__set_PINSEL(0, 9, 2);// Attach MOSI1 to I/O pad
FIO0DIR |= _BV(6);// Set CS# as output
#endif*/
init_spi();
CS_HIGH();// Set CS# high
//for (Timer1 = 10; Timer1; ) ;/* 10ms */
}
static
void power_off (void)/* Disable SPI function */
{
select();/* Wait for card ready */
deselect();
}
/*-----------------------------------------------------------------------*/
/* Receive a data packet from the MMC */
/*-----------------------------------------------------------------------*/
static
int rcvr_datablock (/* 1:OK, 0:Error */
BYTE *buff,/* Data buffer */
UINT btr/* Data block length (byte) */
)
{
BYTE token;
Timer1 = 200;
do {/* Wait for DataStart token in timeout of 200ms */
token = xchg_spi(0xFF);
/* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
} while ((token == 0xFF) && Timer1);
if(token != 0xFE) return 0;/* Function fails if invalid DataStart token or timeout */
rcvr_spi_multi(buff, btr);/* Store trailing data to the buffer */
xchg_spi(0xFF); xchg_spi(0xFF);/* Discard CRC */
return 1;/* Function succeeded */
}
/*-----------------------------------------------------------------------*/
/* Send a data packet to the MMC */
/*-----------------------------------------------------------------------*/
//#if _USE_WRITE
static
int xmit_datablock (/* 1:OK, 0:Failed */
const BYTE *buff,/* Ponter to 512 byte data to be sent */
BYTE token/* Token */
)
{
BYTE resp;
if (!wait_ready(500)) return 0;/* Wait for card ready */
xchg_spi(token);/* Send token */
if (token != 0xFD) {/* Send data if token is other than StopTran */
xmit_spi_multi(buff, 512);/* Data */
xchg_spi(0xFF); xchg_spi(0xFF);/* Dummy CRC */
resp = xchg_spi(0xFF);/* Receive data resp */
if ((resp & 0x1F) != 0x05)/* Function fails if the data packet was not accepted */
return 0;
}
return 1;
}
//#endif
/*-----------------------------------------------------------------------*/
/* Send a command packet to the MMC */
/*-----------------------------------------------------------------------*/
static
BYTE send_cmd (/* Return value: R1 resp (bit7==1:Failed to send) */
BYTE cmd,/* Command index */
DWORD arg/* Argument */
)
{
BYTE n, res;
if (cmd & 0x80) {/* Send a CMD55 prior to ACMD<n> */
cmd &= 0x7F;
res = send_cmd(CMD55, 0);
if (res > 1) return res;
}
/* Select card */
deselect();
if (!select()) return 0xFF;
/* Send command packet */
xchg_spi(0x40 | cmd);/* Start + command index */
xchg_spi((BYTE)(arg >> 24));/* Argument[31..24] */
xchg_spi((BYTE)(arg >> 16));/* Argument[23..16] */
xchg_spi((BYTE)(arg >> 8));/* Argument[15..8] */
xchg_spi((BYTE)arg);/* Argument[7..0] */
n = 0x01;/* Dummy CRC + Stop */
if (cmd == CMD0) n = 0x95;/* Valid CRC for CMD0(0) */
if (cmd == CMD8) n = 0x87;/* Valid CRC for CMD8(0x1AA) */
xchg_spi(n);
/* Receive command resp */
if (cmd == CMD12) xchg_spi(0xFF);/* Diacard following one byte when CMD12 */
n = 10;/* Wait for response (10 bytes max) */
do
res = xchg_spi(0xFF);
while ((res & 0x80) && --n);
return res;/* Return received response */
}
/*--------------------------------------------------------------------------
Public Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* Initialize disk drive */
/*-----------------------------------------------------------------------*/
DSTATUS disk_initialize (
BYTE drv/* Physical drive number (0) */
)
{
BYTE n, cmd, ty, ocr[4];
if (drv) return STA_NOINIT;/* Supports only drive 0 */
power_on();/* Initialize SPI */
if (Stat & STA_NODISK) return Stat;/* Is card existing in the soket? */
FCLK_SLOW();
for (n = 10; n; n--) xchg_spi(0xFF);/* Send 80 dummy clocks */
ty = 0;
if (send_cmd(CMD0, 0) == 1) {/* Put the card SPI/Idle state */
Timer1 = 1000;/* Initialization timeout = 1 sec */
if (send_cmd(CMD8, 0x1AA) == 1) {/* SDv2? */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);/* Get 32 bit return value of R7 resp */
if (ocr[2] == 0x01 && ocr[3] == 0xAA) {/* Is the card supports vcc of 2.7-3.6V? */
while (Timer1 && send_cmd(ACMD41, 1UL << 30)) ;/* Wait for end of initialization with ACMD41(HCS) */
if (Timer1 && send_cmd(CMD58, 0) == 0) {/* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;/* Card id SDv2 */
}
}
} else {/* Not SDv2 card */
if (send_cmd(ACMD41, 0) <= 1) {/* SDv1 or MMC? */
ty = CT_SD1; cmd = ACMD41;/* SDv1 (ACMD41(0)) */
} else {
ty = CT_MMC; cmd = CMD1;/* MMCv3 (CMD1(0)) */
}
while (Timer1 && send_cmd(cmd, 0)) ;/* Wait for end of initialization */
if (!Timer1 || send_cmd(CMD16, 512) != 0)/* Set block length: 512 */
ty = 0;
}
}
CardType = ty;/* Card type */
deselect();
if (ty) {/* OK */
FCLK_FAST();/* Set fast clock */
Stat &= ~STA_NOINIT;/* Clear STA_NOINIT flag */
} else {/* Failed */
power_off();
Stat = STA_NOINIT;
}
return Stat;
}
/*-----------------------------------------------------------------------*/
/* Get disk status */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE drv/* Physical drive number (0) */
)
{
if (drv) return STA_NOINIT;/* Supports only drive 0 */
return Stat;/* Return disk status */
}
/*-----------------------------------------------------------------------*/
/* Read sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_read (
BYTE drv,/* Physical drive number (0) */
BYTE *buff,/* Pointer to the data buffer to store read data */
DWORD sector,/* Start sector number (LBA) */
BYTE count/* Number of sectors to read (1..128) */
)
{
if (drv || !count) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check if drive is ready */
if (!(CardType & CT_BLOCK)) sector *= 512;/* LBA ot BA conversion (byte addressing cards) */
if (count == 1) {/* Single sector read */
if ((send_cmd(CMD17, sector) == 0)/* READ_SINGLE_BLOCK */
&& rcvr_datablock(buff, 512))
count = 0;
}
else {/* Multiple sector read */
if (send_cmd(CMD18, sector) == 0) {/* READ_MULTIPLE_BLOCK */
do {
if (!rcvr_datablock(buff, 512)) break;
buff += 512;
} while (--count);
send_cmd(CMD12, 0);/* STOP_TRANSMISSION */
}
}
deselect();
return count ? RES_ERROR : RES_OK;/* Return result */
}
/*-----------------------------------------------------------------------*/
/* Write sector(s) */
/*-----------------------------------------------------------------------*/
//#if _USE_WRITE
DRESULT disk_write (
BYTE drv,/* Physical drive number (0) */
const BYTE *buff,/* Ponter to the data to write */
DWORD sector,/* Start sector number (LBA) */
BYTE count/* Number of sectors to write (1..128) */
)
{
if (drv || !count) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check drive status */
if (Stat & STA_PROTECT) return RES_WRPRT;/* Check write protect */
if (!(CardType & CT_BLOCK)) sector *= 512;/* LBA ==> BA conversion (byte addressing cards) */
if (count == 1) {/* Single sector write */
if ((send_cmd(CMD24, sector) == 0)/* WRITE_BLOCK */
&& xmit_datablock(buff, 0xFE))
count = 0;
}
else {/* Multiple sector write */
if (CardType & CT_SDC) send_cmd(ACMD23, count);/* Predefine number of sectors */
if (send_cmd(CMD25, sector) == 0) {/* WRITE_MULTIPLE_BLOCK */
do {
if (!xmit_datablock(buff, 0xFC)) break;
buff += 512;
} while (--count);
if (!xmit_datablock(0, 0xFD))/* STOP_TRAN token */
count = 1;
}
}
deselect();
return count ? RES_ERROR : RES_OK;/* Return result */
}
//#endif
/*-----------------------------------------------------------------------*/
/* Miscellaneous drive controls other than data read/write */
/*-----------------------------------------------------------------------*/
#if _USE_IOCTL
DRESULT disk_ioctl (
BYTE drv,/* Physical drive number (0) */
BYTE cmd,/* Control command code */
void *buff/* Pointer to the conrtol data */
)
{
DRESULT res;
BYTE n, csd[16], *ptr = buff;
DWORD *dp, st, ed, csize;
if (drv) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check if drive is ready */
res = RES_ERROR;
switch (cmd) {
case CTRL_SYNC :/* Wait for end of internal write process of the drive */
if (select()) res = RES_OK;
break;
case GET_SECTOR_COUNT :/* Get drive capacity in unit of sector (DWORD) */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
if ((csd[0] >> 6) == 1) {/* SDC ver 2.00 */
csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
*(DWORD*)buff = csize << 10;
} else {/* SDC ver 1.XX or MMC ver 3 */
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
*(DWORD*)buff = csize << (n - 9);
}
res = RES_OK;
}
break;
case GET_SECTOR_SIZE :/* Get sector size in unit of byte (WORD) */
*(WORD*)buff = 512;
res = RES_OK;
break;
case GET_BLOCK_SIZE :/* Get erase block size in unit of sector (DWORD) */
if (CardType & CT_SD2) {/* SDC ver 2.00 */
if (send_cmd(ACMD13, 0) == 0) {/* Read SD status */
xchg_spi(0xFF);
if (rcvr_datablock(csd, 16)) {/* Read partial block */
for (n = 64 - 16; n; n--) xchg_spi(0xFF);/* Purge trailing data */
*(DWORD*)buff = 16UL << (csd[10] >> 4);
res = RES_OK;
}
}
} else {/* SDC ver 1.XX or MMC */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {/* Read CSD */
if (CardType & CT_SD1) {/* SDC ver 1.XX */
*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
} else {/* MMC */
*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
}
res = RES_OK;
}
}
break;
case CTRL_ERASE_SECTOR :/* Erase a block of sectors (used when _USE_ERASE == 1) */
if (!(CardType & CT_SDC)) break;/* Check if the card is SDC */
if (disk_ioctl(drv, MMC_GET_CSD, csd)) break;/* Get CSD */
if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break;/* Check if sector erase can be applied to the card */
dp = buff; st = dp[0]; ed = dp[1];/* Load sector block */
if (!(CardType & CT_BLOCK)) {
st *= 512; ed *= 512;
}
if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000))/* Erase sector block */
res = RES_OK;/* FatFs does not check result of this command */
break;
/* Following commands are never used by FatFs module */
case MMC_GET_TYPE :/* Get MMC/SDC type (BYTE) */
*ptr = CardType;
res = RES_OK;
break;
case MMC_GET_CSD :/* Read CSD (16 bytes) */
if (send_cmd(CMD9, 0) == 0/* READ_CSD */
&& rcvr_datablock(ptr, 16))
res = RES_OK;
break;
case MMC_GET_CID :/* Read CID (16 bytes) */
if (send_cmd(CMD10, 0) == 0/* READ_CID */
&& rcvr_datablock(ptr, 16))
res = RES_OK;
break;
case MMC_GET_OCR :/* Read OCR (4 bytes) */
if (send_cmd(CMD58, 0) == 0) {/* READ_OCR */
for (n = 4; n; n--) *ptr++ = xchg_spi(0xFF);
res = RES_OK;
}
break;
case MMC_GET_SDSTAT :/* Read SD status (64 bytes) */
if (send_cmd(ACMD13, 0) == 0) {/* SD_STATUS */
xchg_spi(0xFF);
if (rcvr_datablock(ptr, 64))
res = RES_OK;
}
break;
default:
res = RES_PARERR;
}
deselect();
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Device timer function */
/*-----------------------------------------------------------------------*/
/* This function must be called from timer interrupt routine in period
/ of 1 ms to generate card control timing.
*/
void disk_timerproc (void)
{
WORD n;
BYTE s;
n = Timer1;/* 1kHz decrement timer stopped at 0 */
if (n) Timer1 = --n;
n = Timer2;
if (n) Timer2 = --n;
s = Stat;
if (WP)/* Write protected */
s |= STA_PROTECT;
else/* Write enabled */
s &= ~STA_PROTECT;
if (INS)/* Card is in socket */
s &= ~STA_NODISK;
else/* Socket empty */
s |= (STA_NODISK | STA_NOINIT);
Stat = s;
}
DWORD get_fattime (void)
{
return ((DWORD)(2012 - 1980) << 25)/* Year = 2012 */
| ((DWORD)1 << 21)/* Month = 1 */
| ((DWORD)1 << 16)/* Day_m = 1*/
| ((DWORD)0 << 11)/* Hour = 0 */
| ((DWORD)0 << 5)/* Min = 0 */
| ((DWORD)0 >> 1);/* Sec = 0 */
}
|