Hardware requirements

  • Micro USB cable

  • LPCXpresso55S28 board

  • Personal Computer

Board settings

Insert the card into card slot

Prepare the Demo

Note: MCUXpresso IDE project default debug console is semihost

  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 with the following 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. Note:Do not try to use DATA3 to detect card, the demo board pull up the DATA3 pin, but DATA3 should be pull down when used as card detect pin.

Running the demo

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


SDCARD polling example.

Please insert a card into board.

Card inserted.

Card size 15523840 * 512 bytes

Working condition:

  Voltage : 3.3V

  Timing mode: High Speed

  Freq : 12000000 HZ

Read/Write/Erase the card continuously until encounter error......

Write/read one data block......
Compare the read/write content......
The read/write content is consistent.
Write/read multiple data blocks......
Compare the read/write content......
The read/write content is consistent.
Erase multiple data blocks......

Input 'q' to quit read/write/erase process.                
Input other char to read/write/erase data blocks again.