Secure Digital (SD), a memory card standard. Has multiple form factors (Standard, MiniSD and MicroSD/Transflash) and multiple capacity ratings (SDSC, SDHC, SDXC). Also extends to SDIO, which allows peripherals in sd form factor to attach to a host, similar to USB.

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39 views

Command Response SD Card Timing in SD Mode

I'm making a SD card stack and I'm currently starting to implement the SD mode. In SPI mode a card is able to receive the command, put the DO/MISO line in '1' while is taking care of the response and ...
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2answers
63 views

Printing SD Card File contents on LCD

This is a part of my program which reads data from SD card File and Display that on LCD screen. ...
0
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1answer
26 views

Replacing SD card reader on a Raspberry Pi B+

I recently purchased a Raspberry Pi B+. However, the micro SD Card reader had a defective spring loading mechanism, so the card would not lock in place (a new Pi is now on the way!) However, I would ...
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2answers
62 views

How to correctly connect a MicroSD card to an FPGA device

I want to ask how to correctly connect a MicroSD card to an FPGA device(not spi version), consider all FPGA pins will be floating for an amount of time before FPGA is configured. I've found a lot of ...
3
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0answers
63 views

FSInit() - “CE_BAD_PARTITION”

I am using a PIC18F26K80 and an XC8 compiler. I am trying to initialise an SD card and create a file. I have simply formatted the SD card on Windows to have a "FAT32" file system and an "Allocation ...
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0answers
93 views

Send a file to an SD card over SPI

I am using a PIC18F4620 and an XC8 compiler. I am trying to create a file and send it to the SD card. I am using the MDD library from the MLA Legacy. My main is: ...
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0answers
45 views

FSIO.c:8344: error: (1089) recursive function call to “_WriteFAT”

I am using a PIC18F25K80 and an XC8 compiler. I am currently trying to use the MDD library from the MLA legacy version (http://www.microchip.com/pagehandler/en-us/devtools/mla/legacy-mla.html). It was ...
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0answers
38 views

FatFs compilation error

I am using a PIC18F25K80 microprocessor and an MPLAB X XC8 compiler. I am trying to crate a new file so I can store data in an SD card. I am using the "FatFs - Generic FAT File System Module" (can be ...
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1answer
76 views

SD card SPI interface for PIC18F25k80

I am using a PIC18f25k80 microprocessor and I want to transfer data on an SD card over SPI. The compiler I am using is MPLAB X XC8. Could you please provide an example of how I can initialise the SD ...
0
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1answer
71 views

I2C-to-SPI bridge and SD card

I am using a PIC18F25k80 microprocessor, which is communicating by using I2C protocol with peripheral ICs. After collecting the data from the ICs I want to store them in an SD card. However for the SD ...
1
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0answers
66 views

FatFs issue with f_write and f_sync

I'm trying to set up a PIC18F67K22 to log data to an SD card, but I am having some trouble getting FatFs working properly. I implemented some low level code following the diskio.c API that is ...
2
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0answers
91 views

SPI / SD Card communication issues

I am working with a PIC18F67K22 and am seeing some bizarre things in the SPI data stream. I am trying to interact with a FAT32 partition using FatFs and a custom built diskio.c file. I am able to ...
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2answers
77 views

Why SD card is less durable than internal storage in smart phones? [closed]

For instance, Raspberry PI managed to destroy SD card in few weeks. (It seems to be a common problem.) However, internal storage in a smartphone works well for several years (5-years-old Nexus One is ...
0
votes
1answer
62 views

Is it possible to check max storage address of a SD card via a command?

How much memory can an SD card hold? I am not going to use a data format. I want to use it as an upgradeable internal storage. So I want to know in which range of addresses I can work. Maybe there is ...
2
votes
2answers
121 views

read sd without filesystem [closed]

I design a DAQ to collect data from different sensor. The data are write in an SD Card by a microcontroller dsPIC33FJ256GP710A. The data are stored without a file system for speed reason. Now I need ...
2
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0answers
41 views

SD Card Buffer in FreeRTOS

One of my tasks in project is resposible for gathering information about values measured from sensors and write information in .txt file on SD Card. I've got question, how would be the most correct ...
1
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1answer
119 views

My For loop isn't exiting and I don't know why

I'm programming an ATMEGA328p on a breadboard and using an arduino board to do the USB to Serial conversion. Part of some code I'm writing involves a for loop that is being used to take the 8 bit ...
1
vote
1answer
72 views

Problems initializing SD card with MSP430

I've been working on some code to talk to an SD card with the MSP430. I can't get the card to enter into idle mode, and I'm actually pretty stumped as to why. I've looked at the microcontroller output ...
0
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2answers
61 views

SDXC Card Reader with LPC1822

in my application I have an SD Card reader using the NXP LPC1822 microcontroller. It works very good with all SD- and SDHC-Cards I've tested so far. Only thing that does not work is SDXC. I already ...
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2answers
182 views

Most carefull way to concatenate strings in C

My firmware in one cycle per 10 second is moving string to the output (csv file on SD card). The problem is that string sometimes in non-deterministic way is changing adding values that shouldn't be ...
1
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1answer
121 views

A USB SD card reader on your own PCB

I'm actively looking for a solution about this since nearly 2 months: I need to build a USB SD card reader slot for my project www.samplerbox.org. I tried various solutions: buy some cheap USB SD ...
0
votes
1answer
128 views

File transfer between two gsm modem

I'm wanting to build a system that will store value on a SD card to form .CSV file , that this is not a problem. There will be about 1000 value recorded daily.I'm wanting to send this values to a pc ...
5
votes
2answers
520 views

What does it mean when components in schematics do not connect?

I'm fairly new to the whole Arduino world, and I'm just really curious about this schematic that I came across... I can read the basics of a schematic, but this one has me puzzled. What are the ...
0
votes
1answer
81 views

Arduino to read file data from SD storage board, and PC user to update same file via usb cable as needed

I have a project where in the finished product (sketch loaded to Arduino and it's running on its own), Arduino needs to regularly read data from a text file stored on a SPI Micro SD storage board (the ...
1
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1answer
65 views

microSDXC Card not responding to SD Interface commands in 3.3V mode

I want to interface a 64GB microSDXC Card via 50MHz SD Bus mode (not UHS, 400kHz during initialization). My initialization sequence works fine with the regular 2 GB SD card from my phone up to ACMD41, ...
0
votes
1answer
105 views

STM32 and SDCard: space management

My task is to gather measurement from peripheries of STM32F4 on SDCard and I started reading about this. Could you double check if I'm correct: Single block memory on my SDCard is 512 bytes, so ...
0
votes
0answers
48 views

Audio recorder takes more time than expected

I'm building an Audio recorder with PIC32, that store the recorded audio in a SD card. I have a problem that happeans with both the compiler mikroC (using swap file) and MPLAB X IDE (using fatfs ...
0
votes
2answers
276 views

SPI Troubleshooting, Teensy, Arduino, and tri-state

I'm trying to get my SPI bus devices up and running on a custom circuit board that I've soldered together. Unfortunately, I neglected to add probe testing spots on this particular circuit board, and ...
1
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1answer
127 views

Adapt fatFS library to PIC32

I'm developing an application with PIC32MX, that record 3 WAV sounds and store theme into SD. Unfortunately the speed that I have reach is 155 kB/s and is insufficient for my application. Then I have ...
0
votes
2answers
90 views

SD card logic levels

I'd like to use an SD card using an SPI interface. My microcontroller uses GPIO logic levels of 2.8V. Do I need a level shifter, or can I connect the card directly? I've had a look at the Physical ...
-4
votes
1answer
376 views

What's the absolute cheapest way to make a 4K HDMI recorder [closed]

I'm looking to build my own 4K HDMI recorder, because the products currently on the market are just to expensive for me. As my title says, I'm trying to do that in the most low-cost way possible. ...
0
votes
0answers
90 views

SD card PIC interface

I wonder if anyone can answer this question. I am working on a project whereby I would like to interface an SD card using a PIC. I already have the PIC16F887. The circuit will basically connect to an ...
0
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0answers
281 views

SDHC + SPI - “illegal command” when trying to read

I was given a supposedly non-working MicroSDHC 16GB Kingston and I am trying to salvage any data from it. I am interfacing it with BusPirate in SPI mode. I can sucessfuly initialize the card, but ...
0
votes
1answer
154 views

Atmega328 to SD card issues [duplicate]

I am working on a board that includes an Atmega328 which needs to read data from an SD card. I am having problems. Here is a diagram: I believe the issue may stem from the voltage divider that is ...
2
votes
1answer
514 views

MicroSD card SPI with ATmega32 [closed]

I want to communicate with a microSD card with an ATmega32 using SPI. I make a simple SPI loopback, and it works fine. Now, how can I communicate with the microSD card to write and read simple bytes ...
0
votes
3answers
177 views

Level Translator for AVR and microSD

I want to connect a microSD card in my AVR ATMEGA32, through SPI, which its operate with 5V. The microSD card i think that operates with 3.3V so, it is must to connected via bidirectinal level ...
2
votes
0answers
104 views

Conformal coating and micro SD card sockets

I have a embedded computer design which uses a low profile micro sd card socket as an extra option in addition to an on board solid state disk as storage/booting mediums. In manufacture the board is ...
0
votes
2answers
71 views

A NAND flash sector suddenly goes bad. What happens to the file using that sector?

I can read a lot about how NAND flash can be checked for bad sectors, which are flagged and won't be read/written to in the future, but happens at the moment a sector goes bad? Any file that was using ...
0
votes
1answer
77 views

Retrieving data recorded by an IoT sensor

If an IoT object records data (accelerometer, gyroscope, ...) in memory, what would be the smartest way to retrieve these data after, let's say, 2-3 days? Store in JSON format on an SD Card? Store ...
1
vote
1answer
161 views

SD Card 4-bit Mode License

The Micro (STM23F4xx) I'm using happens to include a SDIO peripheral that is supposed to support the 4-bit parallel bus SD Card protocol. I'm aware that the SD Association holds patents on the ...
0
votes
1answer
155 views

SD Card Access Library

I am accessing my SD card using SPI. But I've found this to be slow and I am also sad that when there is a faster protocol already supported by my SD card I am using a slower version. Is there a C ...
1
vote
1answer
725 views

How to write on SD card smaller than sector size (512 bytes)

I am writing a library for FAT file system management on STM32 for learning purpose. I want to use a SD/MMC card connected through SPI bus. I do some tests with a disk image on PC (I emulate ...
1
vote
2answers
752 views

Interfacing FPGA and a storage device

I'm doing this project called "High data rate logger". The requirements for this project is to sample the 2 analog signals simultaneously. 2x channel 14-bit ADC Store 60 MSps (mega samples per ...
2
votes
2answers
432 views

Writing to SD Card cheaply

So, here's the scenario: I have an Arduino and an SD card. Unfortunately, I don't have one of the fancy shields, and I don't have the time to order one. As we know, Arduinos run on 5V, and SD cards ...
1
vote
1answer
277 views

How to add a password to an SD card?

I want to build an embedded system that reads external data and logs it to a file saved in an SD card. However this system is accessed through a password and I want either the SD card or the file in ...
2
votes
2answers
994 views

How about soldering microSD card directly to PCB?

I know that microSD cards are typically not designed for this type of use, but has anyone tried this? Would it be possible in production ( >1000 units), that is, would any PCBA service be able to do ...
0
votes
2answers
177 views

Buffer management for SD card in SPI mode

I'm looking into implementing storage of large audio files onto an SD card. I'll be using SPI to access the card to avoid any patents by the SD card mafia. I'll be generating a lot of data, about ...
0
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0answers
117 views

Is a file system something that is implemented in hardware or software?

The context of this question is that I would like to be able to take an SPI flash IC and store audio files on it. The reason I need a file system, specifically FAT, is because I'm using an OGG Decoder ...
0
votes
0answers
78 views

Cost effective high quality audio recording & playback design

For a few days now, I'm looking for a cost effective way for recording a few minutes of audio in high quality 44.1KHz @ 24bit and be able to save a bunch of these "tracks". I thought to use SRAM + ...
0
votes
1answer
318 views

Designing Flash Memory to USB Mass Storage bridge

I've been scratching my head at this for a while now. I'm trying to build a device that records audio using a VS1053 encoder IC to some sort of SPI flash memory. I want to be able to download the ...