LPC Microcontrollers中的主题 Re: read and write in pendriver through USB communication in lpc 54018

read and write in pendriver through USB communication in lpc 54018

Arularasan — Thu, 02 Feb 2023 11:23:29 GMT

how to write and read in pendriver through USB communication in lpc 54018.

iam using USB1 host ?

Re: read and write in pendriver through USB communication in lpc 54018

RaRo — Fri, 03 Feb 2023 16:55:24 GMT

Could you please check the following thread with a similar issue? Solved: I want to use USB conection to read files from pen... - NXP Community

Also, you could try using the USB examples from LPC54018 SDK, if you are using MCUXpresso IDE, click on Import SDK examples… and search for USB. You can download the SDK trough the IDE, or through the following link: MCUXpresso SDK Builder.

[MCUXpresso IDE Quickstart Panel and SDK Import Wizard]

It may be necessary to define which USB are you going to use: USB1 or USB0.

Best regards, Raul.

Re: read and write in pendriver through USB communication in lpc 54018

Arularasan — Tue, 07 Feb 2023 10:42:03 GMT

@RaRo yes i have done all the procedure in lpc 54018 with the help MCUXpresso IDE.

example code generated MCUXpresso IDE. read and write function is not created, kindly help me the steps to read and write in pendriver through USB communication in lpc 54018 iam using USB1 HOST.

Re: read and write in pendriver through USB communication in lpc 54018

RaRo — Tue, 07 Feb 2023 17:15:42 GMT

Hello @Arularasan,

Have you tried out the host_msd_fatfs_bm example? The example seems to use f_write() and f_read(), which are used for writing and reading trough FATFS and USB.

Could you please check the following reference manuals for more information in USB + FATFS applications?

Best regards, Raul.

Re: read and write in pendriver through USB communication in lpc 54018

Arularasan — Mon, 27 Feb 2023 04:57:53 GMT

@RaRo thanks for your reply.

USB HOST demo under SDK example code ("host_msd_fatfs_bm") I have download but its not working !

I want to read and write in pen drive through usb communication iam using USB1.

kindly help me @RaRo

Re: read and write in pendriver through USB communication in lpc 54018

kiwisbrown — Mon, 27 Feb 2023 18:07:06 GMT

You need a JTAG debugger to launch and debug your code running on the NXP LPC54018 board. FreeRTOS was tested using an OM40006 IoT Module. For more information about supported debuggers, see the User Manual for NXP LPC54018 IoT Module that is available from the OM40007 LPC54018 IoT Module product page.

If you're using an OM40006 IoT Module debugger, use a converter cable to connect the 20-pin connector from the debugger to the 10-pin connector on the NXP IoT module.

Connect the NXP LPC54018 and the OM40006 IoT Module Debugger to the USB ports on your computer using mini-USB to USB cables.

filmplus app

Re: read and write in pendriver through USB communication in lpc 54018

RaRo — Mon, 27 Feb 2023 19:37:56 GMT

Hello @Arularasan,

Just for double check, could you please check that your USB1 port is working? You could try using it like a device with one of the USB examples.

Also, could you please check your pendrive? When you enter the pendrive to a computer, does the computer detect it? Could you please try the USB Host example with another pendrive or USB device?

Finally, could you please test another USB Host example with the pendrive? It might be useful to try it with examples: usb_host_cdc and/or usb_host_msd_command.

Best regards, Raul.

Re: read and write in pendriver through USB communication in lpc 54018

butmanufacturer — Tue, 04 Mar 2025 07:49:52 GMT

usb communication in pendriver is quite difficult to use.

Re: read and write in pendriver through USB communication in lpc 54018

butmanufacturer — Thu, 06 Mar 2025 08:46:42 GMT

The movie viewing app HDO Box movies I manage uses this method and it works fine,

Re: read and write in pendriver through USB communication in lpc 54018

Tony889 — Thu, 01 Jan 2026 20:31:45 GMT

the microcontroller must work in USB Host mode, because a pen drive is a USB Mass Storage Class (MSC) device.

The LPC54018 supports USB 2.0 Full-Speed Host, which is sufficient for standard pen drives.

Implementation overview:

Hardware requirements
- USB Type-A connector
- External 5V VBUS supply for the pen drive
- Proper D+ and D− connections
- VBUS sensing recommended
USB Host stack
- Use NXP MCUXpresso SDK
- Enable USB Host + MSC class drivers
- Use FATFS for file system handling
Enumeration
- On insertion, the USB Host enumerates the pen drive
- The device is identified as a Mass Storage device
- Bulk-Only Transport is used for data transfer
File system access
- Most pen drives are formatted as FAT32
- After mounting, standard file operations can be performed
- APIs like f_open(), f_read(), and f_write() are used
Use case example
- Such USB storage access is commonly used in embedded systems to store logs, media files, or cached data.
- For example, an embedded media box that streams content from platforms like HDOBOX could store configuration files, subtitles, or playback logs on a USB pen drive using this method.

Important notes:

exFAT and NTFS are not supported by default
USB Host + FATFS requires sufficient RAM
Add delay after device attachment before mounting