Hello, i'm trying to run USB Host code example provided by NXP for LPC17xx. I have LPC1768 and I'm using the mass storage example. I already check my board, it doesn't matter what I do I always get an error returning from "USBH_MSC_DriveGetMediaStatus" function. USBH_Initialize returns OK. The USB led works great, when I put a pendrive it blinks and thn stays On, and the opposite when flashdrive is removed. Does anyone have an idea?
So have you asked NXP about it, then?
community.nxp.com/.../lpc
"I always get an error returning "
So what error, exactly, do you get?
Have you looked-up the meaning of that error in the documentation?
Have you traced through the code to find the possible cause(s) of that error?
Sorry, I forgot to write which error: usbDeviceError
Running Keyboard example I get the same thing.
Can you explain me how works the USB led pin in LPC17xx? Because it blinks when I insert some device in USB port.
https://ibb.co/kJh3f6 Above, both schematics: MCB1700 dev board and my board schematic.
So Have you looked-up the meaning of that error in the documentation?
"explain me how works the USB led pin in LPC17xx?"
Again, what does the documentation tell you?
There is a poor documentation about it. It says nothing otherwise I would not be here.;
-> Can you explain me how works the USB led pin in LPC17xx?
It is reasonable that it might use the technology called USB GoodLink.
UM10360
Chapter 7: LPC176x/5x Pin configuration
USB_UP_LED — USB GoodLink LED indicator. It is LOW when the device is configured (non-control endpoints enabled), or when the host is enabled and has detected a device on the bus. It is HIGH when the device is not configured, or when host is enabled and has not detected a device on the bus, or during global suspend. It transitions between LOW and HIGH (flashes) when the host is enabled and detects activity on the bus.
11.6.7 SoftConnect The connection to the USB is accomplished by bringing D+ (for a full-speed device) HIGH through a 1.5 kOhm pull-up resistor. The SoftConnect feature can be used to allow software to finish its initialization sequence before deciding to establish connection to the USB. Re-initialization of the USB bus connection can also be performed without having to unplug the cable. To use the SoftConnect feature, the CONNECT signal should control an external switch that connects the 1.5 kOhm resistor between D+ and +3.3V. Software can then control the CONNECT signal by writing to the CON bit using the SIE Set Device Status command.
11.6.8 GoodLink Good USB connection indication is provided through GoodLink technology. When the device is successfully enumerated and configured, the LED indicator will be permanently ON. During suspend, the LED will be OFF. This feature provides a user-friendly indicator on the status of the USB device. It is a useful field diagnostics tool to isolate faulty equipment. To use the GoodLink feature the UP_LED signal should control an LED. The UP_LED signal is controlled using the SIE Configure Device command.
Thanks!
It really makes no sense to me.. I have the Error 33: usbDeviceError.
But the USB Led is ON! Indicating that the device is detected!
I've already checked all connections, USB clock configuration.. T don't know what else to do..