Comments on Design with Microcontrollers: SD/SDHC Card Interfacing with ATmega8 /32 (FAT32 i...

Hi Dharmani, Hope so you are best of your health ...

2012-01-24T06:12:19.260-08:00

Hi Dharmani,

Hope so you are best of your health and job.
Currently i have only one problem that the file i write does not exceed in size more than 4KB by writing data into it.
Can u please help me where i need to focus to solve this problem..
YOUR help in this regard will be highly appropriated.

Thanking YOU in anticipation.

Kind Regards
Asif

When i compile the given code for Atmega8 then com...

2012-01-23T02:40:07.924-08:00

When i compile the given code for Atmega8 then compiler-Vmlab give error device memory exceed.

hi, BS_Structure will create one hole in the stru...

2012-01-21T08:36:18.624-08:00

hi,

BS_Structure will create one hole in the structure after the below two variables.
unsigned char jumpBoot[3]; //default: 0x009000EB
unsigned char OEMName[8];

Because last element of OEMName ends with even address. So the next variable "unsigned int bytesPerSector; //default: 512" wont start in next odd address. It will start at even address (known thing). So this will create the hole in the structure.

You wont get proper values after calling "getBootSectorData" function.

So it is better to pack the structure properly by giving the compiler related #pragma.

hi, i have interfaced this sd card code to LPC122...

2012-01-18T05:17:29.389-08:00

hi,

i have interfaced this sd card code to LPC1227. Iam able to detect the sd card, I can create the file, i can write. But when i connect this sd card my laptop/pc. it is not showing any file in the sd card. Please help me

great job....mr... i`ll try to do it...completly....

2012-01-05T08:23:56.836-08:00

great job....mr...

i`ll try to do it...completly..

great job....mr... i`ll try to do it...completly....

2012-01-05T08:15:06.046-08:00

great job....mr...

i`ll try to do it...completly..

I want to interface SD card to replace e2prom for ...

2012-01-03T05:38:14.080-08:00

I want to interface SD card to replace e2prom for my project.So,I need to know difference between sd card and e2prom interfacing API's.and I,also want it with/without using bat32.It will be so great if you help me.

I made something like that: ... unsigned char fi...

2011-12-28T12:01:00.248-08:00

I made something like that:

...

unsigned char fileName[]="INDIE.TXT";

....
while(1)
{

writeFile(fileName);
_delay_ms(2000);

}

In terminal:

appending data..
Enter text (end with ~):TestText~
File appended!
Invalid fileName..Invalid fileName..Invalid fileName..

What's wrong?

I use HyperTerminal. Hardwear is work fine but i h...

2011-12-28T04:40:33.946-08:00

I use HyperTerminal. Hardwear is work fine but i have problem with save data to memory card. I pick number 7 and write FILETEST.TXT ... and i have something like that:

"Enter file name: FILETEST.TXT
FILETEST.TXT
"
i push enter button and nothing happend.
Is any commend to close file name procedure ?

can I ask for examples sdcard datalogger program w...

2011-12-15T05:40:23.567-08:00

can I ask for examples sdcard datalogger program with cvavr?

or can I ask for references for it?

thanks

how to calculate the value of variable for delay t...

2011-11-27T08:23:14.613-08:00

how to calculate the value of variable for delay tht u used in ur every program in this case value of j
for(i=0;i<millisec;i++)//16Mhz
{
for(j=0;j<1550;j++)
{
asm("nop");
asm("nop");
}

}

This is good For micro-controller program and exp...

2011-11-10T05:45:30.994-08:00

This is good

For micro-controller program and experiment follow me also @

www.pradipyadav.com

Thank you very much Mr. Dharmani for your works an...

2011-10-28T19:34:00.317-07:00

Thank you very much Mr. Dharmani for your works and links. I learned a lot and able to read files from SD card. This is my project:

http://www.youtube.com/watch?v=7HYUhdOpEIM

Really great job! I've got two questions. Fir...

2011-10-18T06:12:38.558-07:00

Really great job!

I've got two questions. First, maybe trivial - can I read files (list files) inside directories? And second - is there any chance to handle long file names?

thanks again
best regards

thank you...Just in time for me..

2011-10-13T23:52:49.313-07:00

thank you...Just in time for me..

I would like to know how to set the time in 12 hrs...

2011-10-08T01:01:34.778-07:00

I would like to know how to set the time in 12 hrs format in the RTC library. Then i need to diplay am or pm accordingly. Im actually just trying to display time from the RTC only.Dont need any other hardware like the MMC card etc. Ive looked up all the libraries you have but its not implemented. Can you kindly help? .
I understand that we need to set Bit 6 in the HRS register for the DS1307 but somehow i cant get it to work

i download your code for m32 and I tried to simula...

2011-10-02T04:28:32.071-07:00

i download your code for m32 and
I tried to simulate it in proteus for mega32 but it traped here infinitely

while(!(SPSR & (1<<SPIF)));

i think then will not run in real circuit.
any solution?
besides circuit diagram has crystal of 16Mhz, and in code it is internal 8Mhz, whic is true?

then please inform me krp.eee@gmail.com

2011-10-01T11:56:50.089-07:00

then please inform me

krp.eee@gmail.com

i download your code for m32 and I tried to simula...

2011-10-01T11:55:11.686-07:00

i download your code for m32 and
I tried to simulate it in proteus for mega32 but it traped here infinitely

while(!(SPSR & (1<<SPIF)));

i think then will not run in real circuit.
any solution?

Error to simulate your hex in proteus, it said &q...

2011-09-25T01:18:53.758-07:00

Error to simulate your hex in proteus,

it said "Error at 507 line it expect 0xFF but there is 0xFE"

did anyone used this hex successfully?

to yogesh gupta, use different chip select pin for...

2011-09-10T00:16:24.549-07:00

to yogesh gupta,
use different chip select pin for the three pin and u will be able to perform..
best luck..

thank you sir for providing such a useful informat...

2011-09-10T00:13:31.317-07:00

thank you sir for providing such a useful information..
it worked..

sir, i am making a project and i am using the sd c...

2011-09-06T07:05:03.318-07:00

sir, i am making a project and i am using the sd card interfacing along with the LCD DISPLAY .BUT SIR . IN ATMEGA32 there is only one SPI . AND we need atleast three spi . tell me sir, how can i do this possible . your suggestion will be very helpful for me.
hope for ur answer.

i'm getting th error of time out for some card...

2011-09-05T02:38:21.740-07:00

i'm getting th error of time out for some card and some times flags are not set.. can you please tell me what can be the problem.. let me know ASAP..

i'm getting CRC error.. please if you can let ...

2011-09-02T23:37:48.674-07:00

i'm getting CRC error.. please if you can let me know what shoud i do..?