Hardware requirements

• Micro USB cable

• MIMXRT700-EVK

• Personal Computer

Board settings

The MMC_SelectBusTiming in mmccard_init will fail, need to be commented out.

Prepare the Demo

1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J54) 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. Launch the debugger in your IDE to begin running the demo.

Running the demo

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

MMCCARD interrupt example.



Card user partition size xxxx bytes



Working condition:



  Voltage: xxxx



  Timing mode: xxxx



  Bus width: xxxx



  Freq : xxxx



Read/Write 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 data groups......



Input 'q' to quit read/write/erase process.

Input other char to read/write/erase data blocks again.