MCUXpresso_LPC55S69/boards/lpcxpresso55s69/sdmmc_examples/sdcard_fatfs_freertos/cm33_core0

Overview

The SDCARD FatFs FreeRTOS project is a demonstration program that uses the SDK software. It reads/writes /erases the SD card continuously. The purpose of this example is to show how to use SDCARD driver with FatFs and freeRTOS in SDK software to access SD card. Note: The output log of the case is not constant, since difference of card access speed and platform will affect the behavior of card access task.

SDK version

• Version: 2.15.000

Toolchain supported

• IAR embedded Workbench 9.40.1
• Keil MDK 5.38.1
• MCUXpresso 11.8.0
• GCC ARM Embedded 12.2

Hardware requirements

• Mini USB cable
• LPCXpresso55S69 board
• Personal Computer

Board settings

Insert the card into the card slot

Prepare the Example

1. Connect a micro USB cable between the PC host and the LPC-Link USB port (P6) on the board.
2. Open a serial terminal on PC for OpenSDA serial device with these settings:
   • 115200 baud rate
   • 8 data bits
   • No parity
   • One stop bit
   • No flow control
3. Download the program to the target board.
4. Reset the SoC and run the project.

Running the demo

When the demo runs successfully, the log would be seen on the terminal like:

FATFS example to demonstrate how to use FATFS with SD card.

Please insert a card into board.

Card inserted.

Make file system......The time may be long if the card capacity is big.

Create directory......

Create a file in that directory......

Create a directory in that directory......

List the file in that directory......
General file : F_1.DAT.
Directory file : DIR_2.

Write/read file until encounters error......

Write to above created file.
Read from above created file.
Compare the read/write content......
The read/write content is consistent.

Input 'q' to quit read/write.
Input other char to read/write file again.

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