visus
/
teensy-sd
Watch 1
Star 0
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Wiki Activity
Browse Source

Add support for Kinetis SDHC on Teensy 3.5 & 3.6

main
PaulStoffregen 8 years ago
parent
4ae02baf25
commit
0d0d071957
4 changed files with 1021 additions and 6 deletions
Split View Show Diff Stats
  1. +1
    -0
      keywords.txt
  2. +976
    -0
      utility/KinetisSDHC.c
  3. +3
    -3
      utility/Sd2Card.cpp
  4. +41
    -3
      utility/Sd2Card.h

+ 1
- 0
keywords.txt View File

@@ -28,3 +28,4 @@ size KEYWORD2
#######################################
FILE_READ LITERAL1
FILE_WRITE LITERAL1
BUILTIN_SDCARD LITERAL1

+ 976
- 0
utility/KinetisSDHC.c View File

@@ -0,0 +1,976 @@
// adapted for Arduino SD library by Paul Stoffregen
// following code is modified by Walter Zimmer from
// from version provided by
// Petr Gargulak (NXP Employee)
//https://community.nxp.com/servlet/JiveServlet/download/339474-1-263510/SDHC_K60_Baremetal.ZIP
//see also
//https://community.nxp.com/thread/99202

#if defined(__MK64FX512__) || defined(__MK66FX1M0__)

#include "kinetis.h"
#include "core_pins.h" // testing only

// Missing in Teensyduino 1.30
#ifndef MPU_CESR_VLD_MASK
#define MPU_CESR_VLD_MASK 0x1u
#endif

/******************************************************************************
* Constants
******************************************************************************/

enum {
SDHC_RESULT_OK = 0, /* 0: Successful */
SDHC_RESULT_ERROR, /* 1: R/W Error */
SDHC_RESULT_WRPRT, /* 2: Write Protected */
SDHC_RESULT_NOT_READY, /* 3: Not Ready */
SDHC_RESULT_PARERR, /* 4: Invalid Parameter */
SDHC_RESULT_NO_RESPONSE /* 5: No Response */ // from old diskio.h
};

#define SDHC_STATUS_NOINIT 0x01 /* Drive not initialized */
#define SDHC_STATUS_NODISK 0x02 /* No medium in the drive */
#define SDHC_STATUS_PROTECT 0x04 /* Write protected */


#define IO_SDHC_ATTRIBS (IO_DEV_ATTR_READ | IO_DEV_ATTR_REMOVE | IO_DEV_ATTR_SEEK | IO_DEV_ATTR_WRITE | IO_DEV_ATTR_BLOCK_MODE)

#define SDHC_XFERTYP_RSPTYP_NO (0x00)
#define SDHC_XFERTYP_RSPTYP_136 (0x01)
#define SDHC_XFERTYP_RSPTYP_48 (0x02)
#define SDHC_XFERTYP_RSPTYP_48BUSY (0x03)

#define SDHC_XFERTYP_CMDTYP_ABORT (0x03)

#define SDHC_PROCTL_EMODE_INVARIANT (0x02)

#define SDHC_PROCTL_DTW_1BIT (0x00)
#define SDHC_PROCTL_DTW_4BIT (0x01)
#define SDHC_PROCTL_DTW_8BIT (0x10)

#define SDHC_INITIALIZATION_MAX_CNT 100000

/* SDHC commands */
#define SDHC_CMD0 (0)
#define SDHC_CMD1 (1)
#define SDHC_CMD2 (2)
#define SDHC_CMD3 (3)
#define SDHC_CMD4 (4)
#define SDHC_CMD5 (5)
#define SDHC_CMD6 (6)
#define SDHC_CMD7 (7)
#define SDHC_CMD8 (8)
#define SDHC_CMD9 (9)
#define SDHC_CMD10 (10)
#define SDHC_CMD11 (11)
#define SDHC_CMD12 (12)
#define SDHC_CMD13 (13)
#define SDHC_CMD15 (15)
#define SDHC_CMD16 (16)
#define SDHC_CMD17 (17)
#define SDHC_CMD18 (18)
#define SDHC_CMD20 (20)
#define SDHC_CMD24 (24)
#define SDHC_CMD25 (25)
#define SDHC_CMD26 (26)
#define SDHC_CMD27 (27)
#define SDHC_CMD28 (28)
#define SDHC_CMD29 (29)
#define SDHC_CMD30 (30)
#define SDHC_CMD32 (32)
#define SDHC_CMD33 (33)
#define SDHC_CMD34 (34)
#define SDHC_CMD35 (35)
#define SDHC_CMD36 (36)
#define SDHC_CMD37 (37)
#define SDHC_CMD38 (38)
#define SDHC_CMD39 (39)
#define SDHC_CMD40 (40)
#define SDHC_CMD42 (42)
#define SDHC_CMD52 (52)
#define SDHC_CMD53 (53)
#define SDHC_CMD55 (55)
#define SDHC_CMD56 (56)
#define SDHC_CMD60 (60)
#define SDHC_CMD61 (61)
#define SDHC_ACMD6 (0x40 + 6)
#define SDHC_ACMD13 (0x40 + 13)
#define SDHC_ACMD22 (0x40 + 22)
#define SDHC_ACMD23 (0x40 + 23)
#define SDHC_ACMD41 (0x40 + 41)
#define SDHC_ACMD42 (0x40 + 42)
#define SDHC_ACMD51 (0x40 + 51)

#define SDHC_FIFO_BUFFER_SIZE 16
#define SDHC_BLOCK_SIZE 512

/******************************************************************************
* Macros
******************************************************************************/

// prescale can be 2, 4, 8, 16, 32, 64, 128, 256
// divisor can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
#define SDHC_SYSCTL_DIVISOR(prescale, divisor) \
(SDHC_SYSCTL_DVS((prescale)>>1)|SDHC_SYSCTL_SDCLKFS((divisor)-1))

#if (F_CPU == 240000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(64, 10) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 5) // 24 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 3) // 40 MHz
#elif (F_CPU == 216000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(64, 9) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 5) // 21.6 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 3) // 36 MHz
#elif (F_CPU == 192000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(32, 15) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 4) // 24 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 48 MHz
#elif (F_CPU == 180000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(32, 15) // 351 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 4) // 22.5 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 45 MHz
#elif (F_CPU == 168000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(32, 14) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 4) // 21 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 42 MHz
#elif (F_CPU == 144000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(32, 12) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 3) // 24 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 36 MHz
#elif (F_CPU == 120000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(32, 10) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 3) // 20 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 30 MHz
#elif (F_CPU == 96000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(16, 15) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 24 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 48 MHz
#elif (F_CPU == 72000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(16, 12) // 375 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 2) // 18 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 36 MHz
#elif (F_CPU == 48000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(8, 15) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 24 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 24 MHz
#elif (F_CPU == 24000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(4, 15) // 500 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 12 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 12 MHz
#elif (F_CPU == 16000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(4, 10) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 8 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 8 MHz
#elif (F_CPU == 8000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(2, 10) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 4 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 4 MHz
#elif (F_CPU == 4000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(2, 5) // 400 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 2 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 2 MHz
#elif (F_CPU == 2000000)
#define SDHC_SYSCTL_400KHZ SDHC_SYSCTL_DIVISOR(2, 3) // 333 kHz
#define SDHC_SYSCTL_25MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 1 MHz
#define SDHC_SYSCTL_50MHZ SDHC_SYSCTL_DIVISOR(2, 1) // 1 MHz
#endif


/******************************************************************************
* Types
******************************************************************************/
typedef struct {
uint8_t status;
uint8_t highCapacity;
uint8_t version2;
uint8_t tranSpeed;
uint32_t address;
uint32_t numBlocks;
uint32_t lastCardStatus;
} SD_CARD_DESCRIPTOR;

/******************************************************************************
* Global functions
******************************************************************************/

uint8_t SDHC_InitCard(void);
uint8_t SDHC_GetStatus(void);
uint32_t SDHC_GetBlockCnt(void);

int SDHC_ReadBlocks(void * buff, uint32_t sector);
int SDHC_WriteBlocks(const void * buff, uint32_t sector);




/******************************************************************************
* Private variables
******************************************************************************/

static SD_CARD_DESCRIPTOR sdCardDesc;

/******************************************************************************
* Private functions
******************************************************************************/

static void SDHC_InitGPIO(void);
static void SDHC_ReleaseGPIO(void);
static void SDHC_SetClock(uint32_t sysctl);
static uint32_t SDHC_WaitStatus(uint32_t mask);
static int SDHC_ReadBlock(uint32_t* pData);
static int SDHC_WriteBlock(const uint32_t* pData);
static int SDHC_CMD_Do(uint32_t xfertyp);
static int SDHC_CMD0_GoToIdle(void);
static int SDHC_CMD2_Identify(void);
static int SDHC_CMD3_GetAddress(void);
static int SDHC_ACMD6_SetBusWidth(uint32_t address, uint32_t width);
static int SDHC_CMD7_SelectCard(uint32_t address);
static int SDHC_CMD8_SetInterface(uint32_t cond);
static int SDHC_CMD9_GetParameters(uint32_t address);
static int SDHC_CMD12_StopTransfer(void);
static int SDHC_CMD12_StopTransferWaitForBusy(void);
static int SDHC_CMD16_SetBlockSize(uint32_t block_size);
static int SDHC_CMD17_ReadBlock(uint32_t sector);
static int SDHC_CMD24_WriteBlock(uint32_t sector);
static int SDHC_ACMD41_SendOperationCond(uint32_t cond);


/******************************************************************************
*
* Public functions
*
******************************************************************************/


// initialize the SDHC Controller
// returns status of initialization(OK, nonInit, noCard, CardProtected)
uint8_t SDHC_Init(void)
{
// Enable clock to SDHC peripheral
SIM_SCGC3 |= SIM_SCGC3_SDHC;

// Enable clock to PORT E peripheral (all SDHC BUS signals)
SIM_SCGC5 |= SIM_SCGC5_PORTE;

SIM_SCGC6 |= SIM_SCGC6_DMAMUX;
SIM_SCGC7 |= SIM_SCGC7_DMA;

// Switch of MPU unit (maybe bug of silicon)
MPU_CESR &= ~MPU_CESR_VLD_MASK;

// De-init GPIO - to prevent unwanted clocks on bus
SDHC_ReleaseGPIO();

/* Reset SDHC */
SDHC_SYSCTL = SDHC_SYSCTL_RSTA | SDHC_SYSCTL_SDCLKFS(0x80);
while (SDHC_SYSCTL & SDHC_SYSCTL_RSTA) ; // wait

/* Initial values */ // to do - Check values
SDHC_VENDOR = 0;
SDHC_BLKATTR = SDHC_BLKATTR_BLKCNT(1) | SDHC_BLKATTR_BLKSIZE(SDHC_BLOCK_SIZE);
SDHC_PROCTL = SDHC_PROCTL_EMODE(SDHC_PROCTL_EMODE_INVARIANT) | SDHC_PROCTL_D3CD;
SDHC_WML = SDHC_WML_RDWML(SDHC_FIFO_BUFFER_SIZE) | SDHC_WML_WRWML(SDHC_FIFO_BUFFER_SIZE);

/* Set the SDHC initial baud rate divider and start */
//SDHC_SetBaudrate(400);
SDHC_SetClock(SDHC_SYSCTL_400KHZ);

/* Poll inhibit bits */
while (SDHC_PRSSTAT & (SDHC_PRSSTAT_CIHB | SDHC_PRSSTAT_CDIHB)) { };

/* Init GPIO again */
SDHC_InitGPIO();

/* Enable requests */
SDHC_IRQSTAT = 0xFFFF;
SDHC_IRQSTATEN = SDHC_IRQSTATEN_DMAESEN | SDHC_IRQSTATEN_AC12ESEN | SDHC_IRQSTATEN_DEBESEN |
SDHC_IRQSTATEN_DCESEN | SDHC_IRQSTATEN_DTOESEN | SDHC_IRQSTATEN_CIESEN |
SDHC_IRQSTATEN_CEBESEN | SDHC_IRQSTATEN_CCESEN | SDHC_IRQSTATEN_CTOESEN |
SDHC_IRQSTATEN_BRRSEN | SDHC_IRQSTATEN_BWRSEN | SDHC_IRQSTATEN_DINTSEN |
SDHC_IRQSTATEN_CRMSEN | SDHC_IRQSTATEN_TCSEN | SDHC_IRQSTATEN_CCSEN;

/* 80 initial clocks */
SDHC_SYSCTL |= SDHC_SYSCTL_INITA;
while (SDHC_SYSCTL & SDHC_SYSCTL_INITA) { };

// to do - check if this needed
SDHC_IRQSTAT |= SDHC_IRQSTAT_CRM;

// Check card
if (SDHC_PRSSTAT & SDHC_PRSSTAT_CINS) {
return 0;
} else {
return SDHC_STATUS_NODISK;
}
}

uint8_t KinetisSDHC_GetCardType(void)
{
if (sdCardDesc.status) return 0;
if (sdCardDesc.version2 == 0) return 1; // SD_CARD_TYPE_SD1
if (sdCardDesc.highCapacity == 0) return 2; // SD_CARD_TYPE_SD2
return 3; // SD_CARD_TYPE_SDHC
}

// initialize the SDHC Controller and SD Card
// returns status of initialization(OK, nonInit, noCard, CardProtected)
uint8_t KinetisSDHC_InitCard(void)
{
uint8_t resS;
int resR;
uint32_t i;

resS = SDHC_Init();

sdCardDesc.status = resS;
sdCardDesc.address = 0;
sdCardDesc.highCapacity = 0;
sdCardDesc.version2 = 0;
sdCardDesc.numBlocks = 0;

if (resS)
return resS;

resR = SDHC_CMD0_GoToIdle();
if (resR) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

resR = SDHC_CMD8_SetInterface(0x000001AA); // 3.3V and AA check pattern
if (resR > 0) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

if (resR == 0) {
if (SDHC_CMDRSP0 != 0x000001AA) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}
sdCardDesc.highCapacity = 1;
}

if (SDHC_ACMD41_SendOperationCond(0)) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

if (SDHC_CMDRSP0 & 0x300000) {
uint32_t condition = 0x00300000;
if (sdCardDesc.highCapacity)
condition |= 0x40000000;
i = 0;
do {
i++;
if (SDHC_ACMD41_SendOperationCond(condition)) {
resS = SDHC_STATUS_NOINIT;
break;
}
} while ((!(SDHC_CMDRSP0 & 0x80000000)) && (i < SDHC_INITIALIZATION_MAX_CNT));


if (resS)
return resS;

if ((i >= SDHC_INITIALIZATION_MAX_CNT) || (!(SDHC_CMDRSP0 & 0x40000000)))
sdCardDesc.highCapacity = 0;
}

// Card identify
if(SDHC_CMD2_Identify()) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

// Get card address
if(SDHC_CMD3_GetAddress()) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

sdCardDesc.address = SDHC_CMDRSP0 & 0xFFFF0000;

// Get card parameters
if(SDHC_CMD9_GetParameters(sdCardDesc.address)) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

if (!(SDHC_CMDRSP3 & 0x00C00000)) {
uint32_t read_bl_len, c_size, c_size_mult;

read_bl_len = (SDHC_CMDRSP2 >> 8) & 0x0F;
c_size = SDHC_CMDRSP2 & 0x03;
c_size = (c_size << 10) | (SDHC_CMDRSP1 >> 22);
c_size_mult = (SDHC_CMDRSP1 >> 7) & 0x07;
sdCardDesc.numBlocks = (c_size + 1) * (1 << (c_size_mult + 2)) * (1 << (read_bl_len - 9));
} else {
uint32_t c_size;
sdCardDesc.version2 = 1;
c_size = (SDHC_CMDRSP1 >> 8) & 0x003FFFFF;
sdCardDesc.numBlocks = (c_size + 1) << 10;
}

// Select card
if (SDHC_CMD7_SelectCard(sdCardDesc.address)) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

// Set Block Size to 512
// Block Size in SDHC Controller is already set to 512 by SDHC_Init();
// Set 512 Block size in SD card
if (SDHC_CMD16_SetBlockSize(SDHC_BLOCK_SIZE)) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

// Set 4 bit data bus width
if (SDHC_ACMD6_SetBusWidth(sdCardDesc.address, 2)) {
sdCardDesc.status = SDHC_STATUS_NOINIT;
return SDHC_STATUS_NOINIT;
}

// Set Data bus width also in SDHC controller
SDHC_PROCTL &= (~ SDHC_PROCTL_DTW_MASK);
SDHC_PROCTL |= SDHC_PROCTL_DTW(SDHC_PROCTL_DTW_4BIT);

// De-Init GPIO
SDHC_ReleaseGPIO();

// Set the SDHC default baud rate
SDHC_SetClock(SDHC_SYSCTL_25MHZ);
// TODO: use CMD6 and CMD9 to detect if card supports 50 MHz
// then use CMD4 to configure card to high speed mode,
// and SDHC_SetClock() for 50 MHz config

// Init GPIO
SDHC_InitGPIO();

return sdCardDesc.status;
}


// read a block from disk
// buff - pointer on buffer where read data should be stored
// sector - index of start sector
int KinetisSDHC_ReadBlock(void * buff, uint32_t sector)
{
int result;
uint32_t* pData = (uint32_t*)buff;

// Check if this is ready
if (sdCardDesc.status != 0)
return SDHC_RESULT_NOT_READY;

// Convert LBA to uint8_t address if needed
if (!sdCardDesc.highCapacity)
sector *= 512;

SDHC_IRQSTAT = 0xffff;

// Just single block mode is needed
result = SDHC_CMD17_ReadBlock(sector);
if(result != SDHC_RESULT_OK) return result;
result = SDHC_ReadBlock(pData);

// finish up
while (!(SDHC_IRQSTAT & SDHC_IRQSTAT_TC)) { } // wait for transfer to complete
SDHC_IRQSTAT = (SDHC_IRQSTAT_TC | SDHC_IRQSTAT_BRR | SDHC_IRQSTAT_AC12E);

return result;
}

//-----------------------------------------------------------------------------
// FUNCTION: disk_write
// SCOPE: SDHC public related function
// DESCRIPTION: Function write block/blocks to disk
//
// PARAMETERS: buff - pointer on buffer where is stored data
// sector - index of start sector
// count - count of sector to write
//
// RETURNS: result of operation
//-----------------------------------------------------------------------------
int KinetisSDHC_WriteBlock(const void * buff, uint32_t sector)
{
int result;
const uint32_t *pData = (const uint32_t *)buff;

// Check if this is ready
if (sdCardDesc.status != 0) return SDHC_RESULT_NOT_READY;

// Convert LBA to uint8_t address if needed
if(!sdCardDesc.highCapacity)
sector *= 512;

SDHC_IRQSTAT = 0xffff;

// Just single block mode is needed
result = SDHC_CMD24_WriteBlock(sector);
if (result != SDHC_RESULT_OK) return result;
result = SDHC_WriteBlock(pData);

// finish up
while (!(SDHC_IRQSTAT & SDHC_IRQSTAT_TC)) { } // wait for transfer to complete
SDHC_IRQSTAT = (SDHC_IRQSTAT_TC | SDHC_IRQSTAT_BWR | SDHC_IRQSTAT_AC12E);

return result;
}

/******************************************************************************
*
* Private functions
*
******************************************************************************/

// initialize the SDHC Controller signals
static void SDHC_InitGPIO(void)
{
PORTE_PCR0 = PORT_PCR_MUX(4) | PORT_PCR_PS | PORT_PCR_PE | PORT_PCR_DSE; /* SDHC.D1 */
PORTE_PCR1 = PORT_PCR_MUX(4) | PORT_PCR_PS | PORT_PCR_PE | PORT_PCR_DSE; /* SDHC.D0 */
PORTE_PCR2 = PORT_PCR_MUX(4) | PORT_PCR_DSE; /* SDHC.CLK */
PORTE_PCR3 = PORT_PCR_MUX(4) | PORT_PCR_PS | PORT_PCR_PE | PORT_PCR_DSE; /* SDHC.CMD */
PORTE_PCR4 = PORT_PCR_MUX(4) | PORT_PCR_PS | PORT_PCR_PE | PORT_PCR_DSE; /* SDHC.D3 */
PORTE_PCR5 = PORT_PCR_MUX(4) | PORT_PCR_PS | PORT_PCR_PE | PORT_PCR_DSE; /* SDHC.D2 */
}

// release the SDHC Controller signals
static void SDHC_ReleaseGPIO(void)
{
PORTE_PCR0 = 0;
PORTE_PCR1 = 0;
PORTE_PCR2 = 0;
PORTE_PCR3 = 0;
PORTE_PCR4 = 0;
PORTE_PCR5 = 0;
}


static void SDHC_SetClock(uint32_t sysctl)
{
uint32_t n, timeout;

n = SDHC_SYSCTL;
// Disable SDHC clocks
n &= ~SDHC_SYSCTL_SDCLKEN;
SDHC_SYSCTL = n;
// Change dividers
n &= ~(SDHC_SYSCTL_DTOCV_MASK | SDHC_SYSCTL_SDCLKFS_MASK | SDHC_SYSCTL_DVS_MASK);
n |= sysctl | SDHC_SYSCTL_DTOCV(0x0E);
SDHC_SYSCTL = n;
/* Wait for stable clock */
timeout = 0xFFFFF;
while ((!(SDHC_PRSSTAT & SDHC_PRSSTAT_SDSTB)) && timeout) {
timeout--;
}
/* Enable SDHC clocks */
SDHC_SYSCTL = n | SDHC_SYSCTL_SDCLKEN;
SDHC_IRQSTAT |= SDHC_IRQSTAT_DTOE;
}

// waits for status bits sets
static uint32_t SDHC_WaitStatus(uint32_t mask)
{
uint32_t result;
uint32_t timeout = 1<<24;
do {
result = SDHC_IRQSTAT & mask;
timeout--;
}
while(!result && (timeout));

if (timeout)
return result;

return 0;
}

// reads one block
static int SDHC_ReadBlock(uint32_t* pData)
{
uint32_t i, irqstat;
const uint32_t i_max = ((SDHC_BLOCK_SIZE) / (4 * SDHC_FIFO_BUFFER_SIZE));

for (i = 0; i < i_max; i++) {
irqstat = SDHC_IRQSTAT;
SDHC_IRQSTAT = irqstat | SDHC_IRQSTAT_BRR;
if (irqstat & (SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE | SDHC_IRQSTAT_DTOE)) {
SDHC_IRQSTAT = irqstat | SDHC_IRQSTAT_BRR |
SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE | SDHC_IRQSTAT_DTOE;
SDHC_CMD12_StopTransferWaitForBusy();
return SDHC_RESULT_ERROR;
}
while (!(SDHC_PRSSTAT & SDHC_PRSSTAT_BREN)) { };
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
*pData++ = SDHC_DATPORT;
}
return SDHC_RESULT_OK;
}

// writes one block
static int SDHC_WriteBlock(const uint32_t* pData)
{
uint32_t i, i_max, j;
i_max = ((SDHC_BLOCK_SIZE) / (4 * SDHC_FIFO_BUFFER_SIZE));

for(i = 0; i < i_max; i++) {
while (!(SDHC_IRQSTAT & SDHC_IRQSTAT_BWR)) ; // wait
if (SDHC_IRQSTAT & (SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE | SDHC_IRQSTAT_DTOE)) {
SDHC_IRQSTAT |= SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE |
SDHC_IRQSTAT_DTOE | SDHC_IRQSTAT_BWR;
(void)SDHC_CMD12_StopTransferWaitForBusy();
return SDHC_RESULT_ERROR;
}
for(j=0; j<SDHC_FIFO_BUFFER_SIZE; j++) {
SDHC_DATPORT = *pData++;
}
SDHC_IRQSTAT |= SDHC_IRQSTAT_BWR;

if (SDHC_IRQSTAT & (SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE | SDHC_IRQSTAT_DTOE)) {
SDHC_IRQSTAT |= SDHC_IRQSTAT_DEBE | SDHC_IRQSTAT_DCE |
SDHC_IRQSTAT_DTOE | SDHC_IRQSTAT_BWR;
(void)SDHC_CMD12_StopTransferWaitForBusy();
return SDHC_RESULT_ERROR;
}
}
return SDHC_RESULT_OK;
}

// sends the command to SDcard
static int SDHC_CMD_Do(uint32_t xfertyp)
{

// Card removal check preparation
SDHC_IRQSTAT |= SDHC_IRQSTAT_CRM;

// Wait for cmd line idle // to do timeout PRSSTAT[CDIHB] and the PRSSTAT[CIHB]
while ((SDHC_PRSSTAT & SDHC_PRSSTAT_CIHB) || (SDHC_PRSSTAT & SDHC_PRSSTAT_CDIHB))
{ };

SDHC_XFERTYP = xfertyp;

/* Wait for response */
if (SDHC_WaitStatus(SDHC_IRQSTAT_CIE | SDHC_IRQSTAT_CEBE | SDHC_IRQSTAT_CCE | SDHC_IRQSTAT_CC) != SDHC_IRQSTAT_CC) {
SDHC_IRQSTAT |= SDHC_IRQSTAT_CTOE | SDHC_IRQSTAT_CIE | SDHC_IRQSTAT_CEBE |
SDHC_IRQSTAT_CCE | SDHC_IRQSTAT_CC;
return SDHC_RESULT_ERROR;
}

/* Check card removal */
if (SDHC_IRQSTAT & SDHC_IRQSTAT_CRM) {
SDHC_IRQSTAT |= SDHC_IRQSTAT_CTOE | SDHC_IRQSTAT_CC;
return SDHC_RESULT_NOT_READY;
}

/* Get response, if available */
if (SDHC_IRQSTAT & SDHC_IRQSTAT_CTOE) {
SDHC_IRQSTAT |= SDHC_IRQSTAT_CTOE | SDHC_IRQSTAT_CC;
return SDHC_RESULT_NO_RESPONSE;
}

SDHC_IRQSTAT |= SDHC_IRQSTAT_CC;

return SDHC_RESULT_OK;

}

// sends CMD0 to put SDCARD to idle
static int SDHC_CMD0_GoToIdle(void)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = 0;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD0) | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_NO));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

// sends CMD2 to identify card
static int SDHC_CMD2_Identify(void)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = 0;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD2) | SDHC_XFERTYP_CCCEN |
SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_136));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

// sends CMD 3 to get address
static int SDHC_CMD3_GetAddress(void)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = 0;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD3) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}
return result;
}

// sends ACMD6 to set bus width
static int SDHC_ACMD6_SetBusWidth(uint32_t address, uint32_t width)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = address;
// first send CMD 55 Application specific command
xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD55) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
} else {
return result;
}
SDHC_CMDARG = width;

// Send 6CMD
xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD6) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}
return result;
}


// sends CMD 7 to select card
static int SDHC_CMD7_SelectCard(uint32_t address)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = address;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD7) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48BUSY));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}
return result;
}

// CMD8 to send interface condition
static int SDHC_CMD8_SetInterface(uint32_t cond)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = cond;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD8) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if(result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}
return result;
}

// sends CMD 8 to send interface condition
static int SDHC_CMD9_GetParameters(uint32_t address)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = address;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD9) | SDHC_XFERTYP_CCCEN |
SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_136));

result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
//(void)SDHC_CMDRSP0;
sdCardDesc.tranSpeed = SDHC_CMDRSP2 >> 24;
}

return result;
}


// sends CMD12 to stop transfer
static int SDHC_CMD12_StopTransfer(void)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = 0;
xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD12) | SDHC_XFERTYP_CMDTYP(SDHC_XFERTYP_CMDTYP_ABORT) |
SDHC_XFERTYP_CICEN | SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48BUSY));

result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
}
return result;
}

// sends CMD12 to stop transfer and first waits to ready SDCArd
static int SDHC_CMD12_StopTransferWaitForBusy(void)
{
uint32_t timeOut = 100;
int result;
do {
result = SDHC_CMD12_StopTransfer();
timeOut--;
} while(timeOut && (SDHC_PRSSTAT & SDHC_PRSSTAT_DLA) && result == SDHC_RESULT_OK);

if (result != SDHC_RESULT_OK)
return result;

if(!timeOut)
return SDHC_RESULT_NO_RESPONSE;

return SDHC_RESULT_OK;
}

// sends CMD8 to set block size
static int SDHC_CMD16_SetBlockSize(uint32_t block_size)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = block_size;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD16) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

// sends CMD17 to read one block
static int SDHC_CMD17_ReadBlock(uint32_t sector)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = sector;

SDHC_BLKATTR = SDHC_BLKATTR_BLKCNT(1) | 512;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD17) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48) |
SDHC_XFERTYP_DTDSEL | SDHC_XFERTYP_DPSEL);

result = SDHC_CMD_Do(xfertyp);
if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

// sends CMD24 to write one block
static int SDHC_CMD24_WriteBlock(uint32_t sector)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = sector;
SDHC_BLKATTR = SDHC_BLKATTR_BLKCNT(1) | 512;

xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD24) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48) |
SDHC_XFERTYP_DPSEL);

result = SDHC_CMD_Do(xfertyp);
if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

// ACMD 41 to send operation condition
static int SDHC_ACMD41_SendOperationCond(uint32_t cond)
{
uint32_t xfertyp;
int result;

SDHC_CMDARG = 0;
// first send CMD 55 Application specific command
xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_CMD55) | SDHC_XFERTYP_CICEN |
SDHC_XFERTYP_CCCEN | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));

result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
} else {
return result;
}

SDHC_CMDARG = cond;

// Send 41CMD
xfertyp = (SDHC_XFERTYP_CMDINX(SDHC_ACMD41) | SDHC_XFERTYP_RSPTYP(SDHC_XFERTYP_RSPTYP_48));
result = SDHC_CMD_Do(xfertyp);

if (result == SDHC_RESULT_OK) {
(void)SDHC_CMDRSP0;
}

return result;
}

#endif // __MK64FX512__ or __MK66FX1M0__

+ 3
- 3
utility/Sd2Card.cpp View File

@@ -220,7 +220,7 @@ void Sd2Card::chipSelectLow(void) {
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
uint8_t Sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin) {
uint8_t Sd2Card::SD_init(uint8_t sckRateID, uint8_t chipSelectPin) {
type_ = 0;
chipSelectPin_ = chipSelectPin;
// 16-bit init start time allows over a minute
@@ -314,7 +314,7 @@ fail:
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
uint8_t Sd2Card::readBlock(uint32_t block, uint8_t* dst)
uint8_t Sd2Card::SD_readBlock(uint32_t block, uint8_t* dst)
{
// use address if not SDHC card
if (type_ != SD_CARD_TYPE_SDHC) block <<= 9;
@@ -434,7 +434,7 @@ uint8_t Sd2Card::waitStartBlock(void) {
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
uint8_t Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
uint8_t Sd2Card::SD_writeBlock(uint32_t blockNumber, const uint8_t* src) {
#if SD_PROTECT_BLOCK_ZERO
// don't allow write to first block
if (blockNumber == 0) {

+ 41
- 3
utility/Sd2Card.h View File

@@ -74,6 +74,16 @@ uint8_t const SD_CARD_TYPE_SD2 = 2;
/** High Capacity SD card */
uint8_t const SD_CARD_TYPE_SDHC = 3;
//------------------------------------------------------------------------------
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
extern "C" {
uint8_t KinetisSDHC_InitCard(void);
uint8_t KinetisSDHC_GetCardType(void);
int KinetisSDHC_ReadBlock(void * buff, uint32_t sector);
int KinetisSDHC_WriteBlock(const void * buff, uint32_t sector);
}
#endif
#define BUILTIN_SDCARD 254
//------------------------------------------------------------------------------
/**
* \class Sd2Card
* \brief Raw access to SD and SDHC flash memory cards.
@@ -84,17 +94,45 @@ class Sd2Card {
Sd2Card(void) : type_(0) {}
/* Initialize an SD flash memory card with the selected SPI clock rate
* and the SD chip select pin. */
uint8_t init(uint8_t sckRateID, uint8_t chipSelectPin);
uint8_t init(uint8_t sckRateID, uint8_t chipSelectPin) {
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
if (chipSelectPin == BUILTIN_SDCARD) {
chipSelectPin_ = BUILTIN_SDCARD;
uint8_t ret = KinetisSDHC_InitCard();
type_ = KinetisSDHC_GetCardType();
return (ret == 0) ? true : false;
}
#endif
return SD_init(sckRateID, chipSelectPin);
}
/* return the type of SD card detected during init() */
uint8_t type(void) const {return type_;}
/** Returns the current value, true or false, for partial block read. */
uint8_t readBlock(uint32_t block, uint8_t* dst);
uint8_t readBlock(uint32_t block, uint8_t* dst) {
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
if (chipSelectPin_ == BUILTIN_SDCARD) {
return (KinetisSDHC_ReadBlock(dst, block) == 0) ? true : false;
}
#endif
return SD_readBlock(block, dst);
}
/** Return the card type: SD V1, SD V2 or SDHC */
uint8_t writeBlock(uint32_t blockNumber, const uint8_t* src);
uint8_t writeBlock(uint32_t block, const uint8_t* src) {
#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
if (chipSelectPin_ == BUILTIN_SDCARD) {
return (KinetisSDHC_WriteBlock(src, block) == 0) ? true : false;
}
#endif
return SD_writeBlock(block, src);
}
private:
uint8_t chipSelectPin_;
uint8_t status_;
uint8_t type_;
// private functions
uint8_t SD_init(uint8_t sckRateID, uint8_t chipSelectPin);
uint8_t SD_readBlock(uint32_t block, uint8_t* dst);
uint8_t SD_writeBlock(uint32_t blockNumber, const uint8_t* src);
uint8_t cardAcmd(uint8_t cmd, uint32_t arg) {
cardCommand(CMD55, 0);
return cardCommand(cmd, arg);

Write Preview
Loading…
Cancel
Save