LPC Microcontrollers中的主题 Re: LPC43S57 USB1 Host Configuration issue

LPC43S57 USB1 Host Configuration issue

Sabarish — Thu, 11 Sep 2025 15:29:01 GMT

We are trying to use USB1 peripheral of LPC43S57 controller as USB host to connect a device in customer board. We are using KEIL MDK to configure the USB stack and USB driver.

When we call USBH_Initialize(1) function it returns an error indicating "Controller does not exist". We tried to search on the internet regarding the USB1 Hardware connections, and we observed that in many places it is mentioned that USB1 peripheral will not work without external PHY. However, the datasheet indicates that it supports on chip full speed PHY.

Can you clarify for us if the USB1 does have on chip full speed PHY?

The USB1_VBUS pin is not used since it is a Host and the device we are connecting is a self powered device.

Also please find below the snapshot of the USB1 connection we have done as Host

Regards

Sabarish Kumar

Re: LPC43S57 USB1 Host Configuration issue

Alice_Yang — Mon, 15 Sep 2025 10:23:14 GMT

Hello @Sabarish

In USB Full-speed mode, use CLK_USB1 to generate a clock for USB1 interface, no need external PHY. While In High-speed mode, the external PHY generates the clock for the USB1 interface, and the USB1_ULPI_CLK must be enabled on pins PC_0 or P8_8 through their respective pin configuration registers in the system configuration block.

Please check that the USB1_DP and USB1_DM signals are correctly connected to the device. Additionally, ensure that the software configuration is properly set up. For reference, you can refer to the USB-host demo provided in the LPCopen library.

Alice

Re: LPC43S57 USB1 Host Configuration issue

Sabarish — Mon, 15 Sep 2025 12:31:25 GMT

Hi @Alice_Yang

I have already configured CLK_USB1 to generate the clock for USB1 interface for 60MHZ. I have Configured USB1 as device(Full Speed mode) and connected to the PC. In LPC43S57 USB controller I can able to see the USB is attached as A device in USB Status register but in PC I can't able to see any COM port or any other USB device is connected. I Have Configured USB0 as device and connected to PC it is detected as COM port and not working with USB1 configuration.

I have attached USB1 device configuration image for your reference

Regards

Sabarish Kumar

Re: LPC43S57 USB1 Host Configuration issue

HeatherUlrich — Wed, 17 Sep 2025 06:13:35 GMT

@Slope Game Anyway, speaking of things crashing spectacularly, I once spent an entire weekend wrestling with a dodgy microcontroller that refused to enumerate correctly. Turns out a single misconfigured clock speed was the culprit, cascading into a chain of unexpected errors that was a real of debugging. It was incredibly frustrating.

Re: LPC43S57 USB1 Host Configuration issue

Alice_Yang — Fri, 19 Sep 2025 08:23:55 GMT

Hello @HeatherUlrich

Did you change USB1 from Host to Device mode and develop the device_cdc project?
If yes, you can first run the CDC demo under LPCOpen on your board to test it.
This will help confirm whether there are any issues with your hardware.

Thank you.

Alice

Re: LPC43S57 USB1 Host Configuration issue

RogerTrahan — Tue, 09 Dec 2025 08:23:48 GMT

Okay, let's unpack this USB conundrum! Is it the internal PHY or some hardware quirk messing things up? That controller error is always a headache. Finding the right USB configuration can feel like navigating a maze. Once, I was wrestling with a stubborn Arduino setup, trying to get it to communicate with a sensor for a project. Spent hours tracing wires and debugging code only to realize a simple power supply issue was the root cause, completely sidelining my @geometry dash -filled afternoon. Sometimes, the obvious escapes us, right?

Re: LPC43S57 USB1 Host Configuration issue

JonathanAshton — Tue, 06 Jan 2026 07:14:36 GMT

That's a tricky issue with the USBH_Initialize function! I remember facing similar hardware connection problems before. Sometimes, even seemingly minor details in the setup can cause headaches. While I can't offer specific hardware debugging advice here, have you considered checking out the Geometry Dash forums? The community there is surprisingly knowledgeable about all sorts of technical challenges, and someone might have encountered a similar problem with USB device initialization.

Re: LPC43S57 USB1 Host Configuration issue

LeoKing — Mon, 09 Feb 2026 08:34:52 GMT

It sounds like you're facing a tricky hardware configuration issue! I've definitely been there with USB setups. Regarding the on-chip PHY, double-checking the specific silicon revision and errata sheet for your chip might provide clarity. While you're troubleshooting, testing your reaction time and mouse skills on a CPS test website could be a fun distraction. It helps sharpen focus! Hope you resolve your USB issue soon!