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Score of 3
1 answer
138 views

For the past few days, I've been iterating through different ways to save a txt file in a microSD using this guide from MicroPeta. Very useful, and it's working fine, but my goal is to have around ...
Score of 1
0 answers
92 views

I'm working on an STMCUBE project that runs on an STM32F411. It requires relatively fast SD card reads, and 4-bit SDIO does not work as it should. There are many reports about problems with 4-bit SDIO,...
Score of 0
1 answer
258 views

For a SD card driver I tried to calculate CRC7 for the commands. Now, if I "enable CRC7 check" with CMD59, I get errors with some SD cards. But if I "disable CRC7" check with CMD59,...
Score of 1
0 answers
159 views

I am trying to write data to an SD card on an ESP32-WROOM. My function for file creation is: bool create_file(const char *file_path, const char *data) { if (!file_path || !data) { printf(&...
Score of 1
1 answer
180 views

TL;DR: Is there a way, using only SPI commands, to tell if the SD card is in SD mode vs. SPI mode? Edited TL;DR: Yes. If the SD card doesn't respond at all to your SPI commands, you know it's either ...
Score of 2
1 answer
428 views

I am trying to send raw mmc commands to SD card using Linux MMC subsystem mmc-utils and ioctl and running into Connection timed out (errno: 110). The SD card is micro-sd card that is used in raspberry ...
Score of 1
0 answers
50 views

I'm working on a NodeMCU project that uses an nRF24L01, SD card, MPU6050, and BMP280. Individually, both the SD card and nRF24 work fine, but when I plug in the SD card, the nRF24 stops working (doesn'...
Score of 0
1 answer
203 views

In the SD Card specification, the response format for CMD8 is R7, and its structure differs slightly between SD mode and SPI mode. In SPI mode, there's a 4-bit field called command version. However, I ...
Score of 2
1 answer
242 views

I am currently attempting to create my own SD Card reader. I have the SD card commands and protocol fully implemented and working giving me usefull and accurate data about my SDCard. ---CARD INFO--- ...
Score of 2
0 answers
471 views

I am trying my best to read data from an SD card using SPI. It works using HAL, but it's very slow, so I am trying to code my own SPI driver. I am stuck on trasnmitting data. The GPIO implementation ...
Score of 1
0 answers
74 views

I am working on a project using an ESP32-S3-CAM WROOM FREENOVE board and MicroPython v1.24.1. I need to read and write raw data directly to an SD card without using a filesystem, as the card has a ...
Score of 0
0 answers
79 views

I try to use pn532 on I2C and sd reader on spi. When I tested pn532 alone, it worked very well. But when I make these devices work together, ESP32 will report an error and force a restart: assert ...
Score of 1
1 answer
518 views

I am trying to merge my separate SD card and MQTT code in an ESP-IDF project to enable functionality for sending data from the SD card to the cloud via MQTT. Both the SD card and MQTT code work ...
Score of 1
0 answers
58 views

I have a wpf application that detects the USB removable devices. We have another service(c# and C++) which takes care of the ejection of the drives. This service is being called by the wpf app. When ...
Score of 1
1 answer
255 views

I have been sitting on this problem for a couple of days where I have been trying to use f_mount on a 8GB SD card (I formatted it to FAT32 and to a sector size of 4096.) I am also copying a very ...

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