MMC/SD card initialization

Hi all,

I am trying to communicate to a SD/MMC card. I have search all over the internet to find examples to get it to work, but it doesn't.
I have made my own PCB according to the schematic that micro engineering has provided. I have also already checked if the SPI is
active, and it is. But right after i call FSinit, i get an error (i read out the error according the example of micro engineering). The
output is as follows:
FAT_error = 6
SDC_status = 1
SDC_response = 255

This is de code for generating to general variables for the SD include:

Code:

---

SD_WE      var PORTC.6    'SD card Write Protect
    SD_WE_TRIS  var TRISC.6    'SD card Write Protect direction
    SDI        var PORTC.4    'SPI data in
    SDI_TRIS    var TRISC.4    'SPI data in direction
    SCL        var PORTC.3    'SPI clock
    SCL_TRIS    var TRISC.3    'SPI clock direction
    SD_CS      var PORTA.5    'SD card Chip Select
    SD_CS_TRIS  var TRISA.5    'SD card chip select direction
    SD_CD      var PORTC.7    'SD card Detect
    SD_CD_TRIS  var TRISC.7    'SD card detect direction
    SDO        var PORTC.5    'SPI data out
    SDO_TRIS    Var TRISC.5    'SPI data out direction

---

and my own code in main:

Code:

---

    gosub FSInit                'initialise the SD card
    Serout2 PORTB.1, 84, ["Init: ", FAT_error, " ", SDC_status, " ", SDC_response, $d, $a]
    gosub SD_error_check        'Check for errors on SD card
    gosub FINDfirst            'Look for files on SD card
    While(FAT_error = 0)        'Find next file on card
        files_found = files_found + 1
        Gosub FINDnext         
    Wend

---

Can someone give me a direction to search for. I have already wasted lots of time to confirm if
it is actually working (PIC) and I am know at the point of desperation (almost :) ).

I'm waiting for that good old little segment that you always forget somehow ;(.

kind regards,

Remco

Code:

---

' This section defines a specific short (8.3) filename
'  Note that spaces are use in empty elements and must be upper case for Windows
        FAT_FileName[0] = "T"
        FAT_FileName[1] = "E"
        FAT_FileName[2] = "S"
        FAT_FileName[3] = "T"
        FAT_FileName[4] = "1"
        FAT_FileName[5] = " "
        FAT_FileName[6] = " "
        FAT_FileName[7] = " "
        FAT_FileName[8] = "T"
        FAT_FileName[9] = "X"
        FAT_FileName[10] = "T"

---

This is important.

Robert

Kept on going through the pages of threads and found this one:
http://www.picbasic.co.uk/forum/show...hlight=sd+card

They point to MeLabs samples (that we probably already have in PBP):
http://melabs.com/samples/PBP-mixed/index.htm

(scroll down to sdfs3.pbp)

It's the same ReadMe, but it has an earlier date on at least two of the files at a quick glance.

I'd use that one. It has the truckload of pins like you are using, :) so it's possible it'll suit your needs.

Nice schematic too.

Robert


EDIT: And after going through the files a bit, this is where I notice that this is exactly where you got your code from.

Did you notice this part?

Quote:

---

The included PICBASIC PRO code requires PBP version 2.50 or later. It uses
the PIC18 long libraries that are part of that version of the compiler. This
also means the files only work on PIC18 parts. Be sure to specify the long
version of the compiler, PBPL, when compiling programs using these files.

---

Did you go through the little test program?

Code:

---

' Name        : sdfs3.pbp
' Compiler    : PICBASIC PRO Compiler 2.6 (PBPL only)
' Assembler  : MPASM
' Target PIC  : PIC16F4550
' Hardware    : Schematic available in http://melabs.com/resources/samples/pbp/sdfs3.zip
' Oscillator  : 20MHz
' Keywords    : SD Card, SD/MMC, FAT16
' Description : 10/02/08 - PICBASIC PRO 2.50L test program to talk to FAT16
' formatted MMC/SD cards with PIC18F4550.  This is only a test program that
' is part of a larger project.  The complete fileset with schematic, includes,
' and details can be found at download:
' http://melabs.com/resources/samples/pbp/sdfs3.zip


        Define        OSC        20        ' 20 MHz oscillator

' Alias PIC pins and registers for SD/MMC card
SD_WE                Var        PORTA.4        ' SD card write protect
SD_WE_TRIS        Var        TRISA.4        ' SD card write protect direction
SDI                Var        PORTB.0        ' SPI data in
SDI_TRIS        Var        TRISB.0        ' SPI data in direction
SCL                Var        PORTB.1        ' SPI clock
SCL_TRIS        Var        TRISB.1        ' SPI clock direction
SD_CS                Var        PORTB.3        ' SD card chip select
SD_CS_TRIS        Var        TRISB.3        ' SD card chip select direction
SD_CD                Var        PORTB.4        ' SD card detect
SD_CD_TRIS        Var        TRISB.4        ' SD card detect direction
SDO                Var        PORTC.7        ' SPI data out
SDO_TRIS        Var        TRISC.7        ' SPI data out direction


' Include the SD/MMC subroutines (found in http://melabs.com/resources/samples/pbp/sdfs3.zip)
        Include "SDFS.PBP"
        SDC_UseHardSPI = TRUE        ' Use hardware SSP port for SPI.

        ADCON1 = 15                ' All I/O pins digital
        Pause 100

        ' FSInit initializes the card and reads all the preliminary information from it
        Gosub FSInit
        Serout2 PORTC.6, 84, ["Init: ", Dec FAT_error, " ", Dec SDC_status, " ", Dec SDC_response, $d, $a]
        If (FAT_error != 0) Then Stop

        ' Display card directory
        Gosub FINDfirst                ' Find first file on card
        While (FAT_error = 0)
                Serout2 PORTC.6, 84, [Str FAT_FileName\11, $d, $a]
                Gosub FINDnext        ' Find next file on card
        Wend

' This section defines a specific short (8.3) filename
'  Note that spaces are use in empty elements and must be upper case for Windows
        FAT_FileName[0] = "T"
        FAT_FileName[1] = "E"
        FAT_FileName[2] = "S"
        FAT_FileName[3] = "T"
        FAT_FileName[4] = "1"
        FAT_FileName[5] = " "
        FAT_FileName[6] = " "
        FAT_FileName[7] = " "
        FAT_FileName[8] = "T"
        FAT_FileName[9] = "X"
        FAT_FileName[10] = "T"

' Set file time to 8:30:10 and date to 1/1/2008
        FAT_seconds = 5
        FAT_minutes = 30
        FAT_hours = 8
        FAT_day = 1
        FAT_month = 1
        FAT_year = 28

' Open a file for write
        FAT_mode = "w"                ' Write mode
        Gosub FSfopen                ' Open file pointed to by Byte array FAT_FileName
        Serout2 PORTC.6, 84, ["Open for write: ", Dec FAT_error, $d, $a]
        If (FAT_error != 0) Then Stop

' Write to file
        FAT_src[0] = "A"
        FAT_src[1] = "B"
        FAT_src[2] = "C"
        FAT_count = 3
        Gosub FSfwrite
        Serout2 PORTC.6, 84, [ "Write ", Dec FAT_error, $d, $a]
        If (FAT_error != 0) Then Stop

' Close file
        Gosub FSfclose
        Serout2 PORTC.6, 84, [ "Close ", Dec FAT_error, $d, $a]
        If (FAT_error != 0) Then Stop

' Open a file for read
        FAT_mode = "r"                ' Read mode
        Gosub FSfopen                ' Open file pointed to by Byte array FAT_FileName
        Serout2 PORTC.6, 84, ["Open: ", Dec FAT_error, $d, $a]
        If (FAT_error != 0) Then Stop

' Read and display the whole file
        FAT_count = 1                ' Read 1 byte to buffer at a time
        Gosub FSfread
        While (FAT_error = 0)
                Serout2 PORTC.6, 84, [FAT_dest[0]]
                FAT_count = 1        ' Read 1 byte to buffer at a time
                Gosub FSfread
        Wend
        Serout2 PORTC.6, 84, [ "Read: ", Dec FAT_error, $d, $a]

' Delete a file
'        Gosub FSremove                ' Delete file pointed to by Byte array FAT_FileName
'        Serout2 PORTC.6, 84, ["Remove: ", Dec FAT_error, $d, $a]
'        If (FAT_error != 0) Then Stop

' Rename a file
' FAT_FileName2 is new name
'        FAT_FileName2[0] = "T"
'        FAT_FileName2[1] = "E"
'        FAT_FileName2[2] = "S"
'        FAT_FileName2[3] = "T"
'        FAT_FileName2[4] = "2"
'        FAT_FileName2[5] = " "
'        FAT_FileName2[6] = " "
'        FAT_FileName2[7] = " "
'        FAT_FileName2[8] = "T"
'        FAT_FileName2[9] = "X"
'        FAT_FileName2[10] = "T"
'        Gosub FSrename                ' Rename file pointed to by Byte array FAT_FileName
'        Serout2 PORTC.6, 84, ["Rename: ", Dec FAT_error, $d, $a]
'        If (FAT_error != 0) Then Stop

        End

---

And now I notice you copied from this program, yeeesh, I'm great help tonight. :D

Dumb question, have you tried using the sample test program AS IS? (correcting pins and CONFIGs of course)

Robert


EDIT: The Target PIC must be a typo in the comments:

Code:

---

' Target PIC  : PIC16F4550

---

The Description is most likely correct:

Code:

---

' Target PIC  : PIC18F4550

---

Post your whole code. State the parts you are using and how they are connected. Verify the SD card is good, 2 gb or less and formatted FAT16.

Do you have this line near the top of your code ?

Code:

---

SDC_UseHardSPI = FALSE    ' Use hardware SSP port for SPI.

---

Code:

---

CE_GOOD        Con    0    ' No error
CE_ERASE_FAIL    Con    1    ' An erase failed
CE_NOT_PRESENT    Con    2    ' No device was present
CE_NOT_FORMATTED Con    3    ' The disk is of an unsupported format
CE_BAD_PARTITION Con    4    ' The boot record is bad
CE_UNSUPPORTED_FS Con    5    ' The file system type is unsupported
CE_INIT_ERROR    Con    6    ' An initialization error has occured
CE_NOT_INIT    Con    7    ' An operation was performed on an uninitialized device
CE_BAD_SECTOR_READ Con    8    ' A bad read of a sector occured
CE_WRITE_ERROR    Con    9    ' Could not write to a sector
CE_INVALID_CLUSTER Con    10    ' Invalid cluster value > maxcls
CE_FILE_NOT_FOUND Con    11    ' Could not find the file on the device
CE_DIR_NOT_FOUND Con    12    ' Could not find the directory
CE_BAD_FILE    Con    13    ' File is corrupted
CE_DONE        Con    14    ' No more files in this directory
CE_COULD_NOT_GET_CLUSTER Con 15    ' Could not load/allocate next cluster in file
CE_FILENAME_2_LONG Con    16    ' A specified file name is too long to use
CE_FILENAME_EXISTS Con    17    ' A specified filename already exists on the device
CE_INVALID_FILENAME Con    18    ' Invalid file name
CE_DELETE_DIR    Con    19    ' The user tried to delete a directory with FSremove
CE_DIR_FULL    Con    20    ' All root dir entry are taken
CE_DISK_FULL    Con    21    ' All clusters in partition are taken
CE_DIR_NOT_EMPTY Con    22    ' This directory is not empty yet, remove files b4 deleting
CE_NONSUPPORTED_SIZE Con 23    ' The disk is too big to format as FAT16
CE_WRITE_PROTECTED Con    24    ' Card is write protected
CE_FILENOTOPENED Con    25    ' File not opened for the write
CE_SEEK_ERROR    Con    26    ' File location could not be changed successfully
CE_BADCACHEREAD    Con    27    ' Bad cache read
CE_CARDFAT32    Con    28    ' FAT32 - card not supported
CE_READONLY    Con    29    ' The file is read-only
CE_CARDFAT12    Con    30    ' FAT12 - card not supported
CE_WRITEONLY    Con    31    ' The file is write-only
CE_INVALID_ARGUMENT Con    32    ' Invalid argument
CE_FAT_EOF    Con    60    ' Attempt to read beyond the FAT's EOF
CE_EOF        Con    61    ' End of file reached

---

Code:

---

sdcValid        Con        0
sdcCardInitCommFailure Con 1
sdcCardNotInitFailure Con 2
sdcCardInitTimeout Con        3
'sdcCardTypeInvalid Con        4
sdcCardBadCmd        Con        5
sdcCardTimeout        Con        6
'sdcCardCRCError        Con        7
sdcCardDataRejected Con        8
'sdcEraseTimedOut Con        9

---

Code:

---

SDC_FLOATING_BUS Con        $ff
SDC_BAD_RESPONSE Con        SDC_FLOATING_BUS

---

Well, the codes aren't much help.

Robert

First of all thank you for all you replies.

With regard to you Demon:
*Yes, I use capital letters for the files.
*Yes, I have selected to use PBPL (get the message when it is compiled).
*Yes, I am using an PIC18 part (specific PIC18F26K80).
*And yes, I also found what the error codes represents and as you stated they aren't so much of a help.

With regards to mackrackit:
As you can see in the code below, i have specified your line directly after I include the SDFS file.
And i use a 2GB card and it is in FAT format (and that will be FAT16, according to Microsoft).

I have already established that all my IO works, but today I am gonna try to monitor the data that is send
to the SD card and what he will send back

Code:

---

'configuration bits 
#CONFIG
    CONFIG  RETEN = ON          ; Ultra low-power regulator is Enabled (Controlled by SRETEN bit)
    CONFIG  INTOSCSEL = HIGH    ; LF-INTOSC in High-power mode during Sleep
    CONFIG  SOSCSEL = HIGH      ; High Power SOSC circuit selected
    CONFIG  XINST = OFF        ; Disabled
    CONFIG  FOSC = INTIO2      ; Internal RC oscillator
    CONFIG  PLLCFG = ON        ; Enabled
    CONFIG  FCMEN = ON          ; Enabled
    CONFIG  IESO = OFF          ; Disabled
    CONFIG  PWRTEN = ON        ; Enabled
    CONFIG  BOREN = SBORDIS    ; Enabled in hardware, SBOREN disabled
    CONFIG  BORV = 3            ; 1.8V
    CONFIG  BORPWR = ZPBORMV    ; ZPBORMV instead of BORMV is selected
    CONFIG  WDTEN = ON          ; WDT controlled by SWDTEN bit setting
    CONFIG  WDTPS = 512        ; 1:512
    ;CONFIG  CANMX = PORTB      ; ECAN TX and RX pins are located on RB2 and RB3, respectively
    ;CONFIG  MSSPMSK = MSK7    ; 7 Bit address masking mode
    CONFIG  MCLRE = ON          ; MCLR Enabled, RE3 Disabled
    CONFIG  STVREN = ON        ; Enabled
    CONFIG  BBSIZ = BB2K        ; 2K word Boot Block size
    CONFIG  CP0 = OFF          ; Disabled
    CONFIG  CP1 = OFF          ; Disabled
    CONFIG  CP2 = OFF          ; Disabled
    CONFIG  CP3 = OFF          ; Disabled
    CONFIG  CPB = OFF          ; Disabled
    CONFIG  CPD = OFF          ; Disabled
    CONFIG  WRT0 = OFF          ; Disabled
    CONFIG  WRT1 = OFF          ; Disabled
    CONFIG  WRT2 = OFF          ; Disabled
    CONFIG  WRT3 = OFF          ; Disabled
    CONFIG  WRTC = OFF          ; Disabled
    CONFIG  WRTB = OFF          ; Disabled
    CONFIG  WRTD = OFF          ; Disabled
    CONFIG  EBTR0 = OFF        ; Disabled
    CONFIG  EBTR1 = OFF        ; Disabled
    CONFIG  EBTR2 = OFF        ; Disabled
    CONFIG  EBTR3 = OFF        ; Disabled
    CONFIG  EBTRB = OFF        ; Disabled
#ENDCONFIG

'alias PIC pins definition
    OP1        var PORTC.1    'For JUMPER1
    OP1_TRIS    var TRISC.1
    TX1        var PORTC.0
    TX1_TRIS    var TRISC.2
    OP2        var PORTB.4
    OP2_TRIS    var TRISB.4
    RX1        var PORTC.2
    RX1_TRIS    var TRISC.2
   
    OP3        var PORTB.2    'For JUMPER2
    OP3_TRIS    var TRISB.2
    TX2        var PORTB.3
    TX2_TRIS    var TRISB.3
    OP4        var PORTB.0
    OP4_TRIS    var TRISB.0
    RX2        var PORTB.1
    RX2_TRIS    var TRISB.1
   
    OP5        var PORTA.3    'For JUMPER3
    OP5_TRIS    var TRISA.3
    TX3        var PORTA.2
    TX3_TRIS    var TRISA.2
    OP6        var PORTA.6
    OP6_TRIS    var TRISA.6
    RX3        var PORTA.7
    RX3_TRIS    var TRISA.7
   
    SHTDWN      var PORTA.1    'Shutdown 3.3V regulator
    SHTDWN_TRIS VAR TRISA.1
   
    SD_WE      var PORTC.6    'SD card Write Protect
    SD_WE_TRIS  var TRISC.6    'SD card Write Protect direction
    SDI        var PORTC.4    'SPI data in
    SDI_TRIS    var TRISC.4    'SPI data in direction
    SCL        var PORTC.3    'SPI clock
    SCL_TRIS    var TRISC.3    'SPI clock direction
    SD_CS      var PORTA.5    'SD card Chip Select
    SD_CS_TRIS  var TRISA.5    'SD card chip select direction
    SD_CD      var PORTC.7    'SD card Detect
    SD_CD_TRIS  var TRISC.7    'SD card detect direction
    SDO        var PORTC.5    'SPI data out
    SDO_TRIS    Var TRISC.5    'SPI data out direction
       
    Rail_v      var PORTA.0    'incomming 5V rail
    Rail_v_TRis var TRISA.0
   
    LED        var PORTB.5    'Status LED
    LED_TRIS    var TRISB.5   

    MCLR        var PORTE.3    'MCLR
   
    PGD        var PORTB.7    'PGD programming data
    PGD_TRIS    var TRISB.7
    PGC        var PORTB.6    'PGC programming clock
    PGC_TRIS    var TRISB.6

'includes:
    include "SDFS.bas"          ' include for using FAT16-SD card
    'include "SDFShc32d.pbp."
    SDC_UseHardSPI = FALSE
    INCLUDE "DT_INTS-14.bas"    ' Base Interrupt System
    INCLUDE "ReEnterPBP.bas"    ' Include if using PBP interrupts
    include "modedefs.bas"
   
'defines for compiler
    DEFINE  LOADER_USED 0      'Not using a bootloader
    define  OSC 16              'Tell PBP to expect 64MHz clock   
       
'watchdog settings
    WDTCON = 22                'Set WDT to 2 s (default = 2 s)
    WDTCON.0 = 1                'enable watchdog
   
'oscillator settings
    OSCCON = %01110000          'Set internal clock to 16 MHz 
    'OSCTUNE = %11000000        'enable PLL (clock = now 64 MHz)
   
'interrupt settings
    INTCON = %00000000          'disabled all interupts
   
'option settings

'analog i/o port settings   
    ANCON0 = %00000001
    ANCON1 = %00000000
    SLRCON = %00000000
       
'digital i/o port settings
    PADCFG1 = %00000000        'disable pull-up 
    WPUB = %00000000            'disable pull-up 
    ODCON = %00000000          'disable open-drain 
    TRISA = %00010101          'Port A
    TRISB = %11001000          'Port B     
    TRISC = %11010001          'Port C
   
'adc settings
    ADCON0 = %00000001
    ADCON1 = %00110000          'Use internal 4.1 refference
    ADCON2 = %10000000          'Right justified
   
'uart settings

         
'spi settings
     
'timer2
    T2CON = %01111111          'postscaler=16,timer on, prescaler=16 (62500 Hz)   
    PR2 = 251                  'comperator value is set to divide by 251(250 Hz)
    PIR2.1 = 0                  'reset flag
       
'constant definition
    FIRMWARE_VERSION_M  con 00  ' M + . + S is the firmware version -> XX.XX
    FIRMWARE_VERSION_S  con 10
   
    log_control_max    con 53  'Maxmimum data to be received from control board
    log_pumpfix_max    con 11  'and pumpfix board after logging reqeust
    log_row_bytes      con 67  'Add log_control and log_pumpfix + carriage return and 2 tabs
    Startup_control_max con 1  'Maximu data to be received from control after start up request
    log_general_max    con 207 'Maximum of data that is contained in the general information block
    log_info_banner    con 229 'maximum of data that is contained in the infromation banner for the logging
    log_ofset_bytes    con 436 'Ofset in bytes for log data to be stored : log_general_max + log_info_banner
    MAX_NOEN            con 8000'max of log entries, after that a new file has to be created (~500 MB)
    MAX_files          con 3

    File_PN_L          con 10  'Following numbers represents the maximum number
    File_SN_L          con 9  'of bytes (LENGTH) that can be written to the
    File_FV_L          con 5  'file for each point in the general information
    File_TSO_L          con 6  'banner.
    File_TSON_L        con 6  'One byte represents one decimal value in a .txt
    File_TT_L          con 10  'file.
    File_NOER_L        con 9
    File_NOEN_L        con 4
   
    File_PN_S          con 15  'Following numbers represents the first (START) 
    File_SN_S          con 43  'possistion (byte) of the corresponding general 
    File_FV_S          con 72  'information.
    File_TSO_S          con 98  'All the given numbers are measured from the
    File_TSON_S        con 116 'starting point (0) in the file.
    File_TT_S          con 137
    File_NOER_S        con 167
    File_NOEN_S        con 197
       
'variable definition
    TimerTick_max      var word'variable to contain needed interval
    TimerTick_counter  var word'variable that counts the interval
    LED_blink_counter  var byte'variable for pulses on the error LED
    i                  var byte
   
    log_control_data    var byte [log_control_max]      'array for received data
    log_pumpfix_data    var byte [log_pumpfix_max]      'array for received data
    strtup_control_data var byte [Startup_control_max]  'array for recived data
    AN0_value          var word'variable to store ADC value of 5V rail   

    files_found        var word'For indexing the number of files
   
    File_PN            var byte[File_PN_L]    'Variables to write to the
    File_SN            var byte[File_SN_L]    'SD card when there needs to
    File_FV            var byte[File_FV_L]    'be a new file to be
    File_TSO            var byte[File_TSO_L]    'generated
    File_TSON          var byte[File_TSON_L]
    File_TT            var byte[File_TT_L]
    File_NOER          var byte[File_NOER_L]
    File_NOEN          var byte[File_NOEN_L]
   
    Current_TSO        var long'Current values that are read out from the file
    Current_TSON        var long'on the SD card. These wil also be used for
    Current_TT          var long'general values to be written to the file
    Current_NOER        var LOng
    Current_NOEN        var word
    Current_NOER_last  var byte

'hardware initialisation   
    SHTDWN = 0
    LED = 0
'software initialisation, setting variables at their initial value
    TimerTick_max = 15000      'is 60 seconds   
    TimerTick_counter = 0      'Set counter to 0
    LED_blink_counter = 0      'For indicating error
    files_found = 0
    Current_TSO = 0
    Current_TSON = 0
    Current_TT = 0
    Current_NOER = 0
    Current_NOEN = 0
   
   
    pause 10000
'interrupt settings
ASM
INT_LIST  macro    ;    IntSource,  Label,                  Type,  ResetFlag?
        INT_Handler    TMR2_INT,  _TimerTick,            PBP,    yes         
    endm
    INT_CREATE                  ;Creates the interrupt processor
ENDASM
@ INT_ENABLE        TMR2_INT    ;enable Timer 2 interrupts

'---[Main]----------------------------------------------------------------------
Main:
    LED = 0                    'indicate start up procedure
                                 
    gosub FSInit                'initialise the SD card
    Serout2 PORTB.1, 84, ["Init: ", FAT_error, " ", SDC_status, " ", SDC_response, $d, $a]
    gosub SD_error_check        'Check for errors on SD card
    gosub FINDfirst            'Look for files on SD card
    While(FAT_error = 0)        'Find next file on card
                files_found = files_found + 1
                Gosub FINDnext             
        Wend

---

Hi Demon,

Thanks for you private message. Only I cant reply with that and cant create my own.
When i go to: "My profile" I get the following message:

Quote:

---

You have been banned for the following reason:
No reason was specified.

Date the ban will be lifted: Never

---

Fortunally i can react on my own post, so that why I direct this "mail" to you in this way.
If you have read it, it may be deleted because is has no further information to this kind
of topic.

With kind regards and helpful wishes,

Remco

Hi Remco.

Try again and see your status. Hope is OK now.

If not, Lester Please see the case.

Ioannis

one problem i had when first getting sd card to work was cheep / ebay sd card slot holder
i had micro sd card that was then fitted to standard sd card adapter

changing the sd slot holder pcb allowed the sd card to work , it turned out 4 sd slot card holders did not hold the sd card well and would not allow initialization

something to check / test

All of you, thank you for your help.

But ofcource, as always, the code wasn't wrong (for now). My PCB layout was a tiny bit wrong with regards to the SD pinout.

As they say, the devil is in the details :frown:

Yet another little fact learned.

But i will stay in touch, because I see other problem in the near furture.

Kind regards,

Rmeco

And here am i again,

I am using the standard example from microengineering to write to a SD card.
I can see that it's willing to create a new file, only when i want to write to it i
get the error 9 (CE_WRITE_ERROR Con 9 ' Could not write to a sector).
Am I blind to something or is it just so simple that i miss it?

And ofcource it was sutch a simple but rather irritating problem.

Apperently the SDFS file or SD card doenst like a timer interrupt around the 4 ms.

After removing this timer, is all worked an i could write to the file and read all of it.

Thanks for the help anyway.

Kind regards,

Remco

You're welcome.

This was research for my future use of SD cards. That sample code is perfect.

also even though he removed the timer, i wonder why it was using DT-INT-14,and not the int-18 version which is correct for the 18f chip sets

Al-tho it works fine (I see no difference in it't execution). And I actually never knew there was another file specially for pic18F and pic18LF. But I have changed it to the correct version now, thanks for the head-up.