topic Re: How to detect a USB cable was connected to my device? in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358358#M18048 <HTML><HEAD></HEAD><BODY><P>Hello Jorge,</P><P></P><P>Thank you very much for the reply!</P></BODY></HTML> Thu, 18 Dec 2014 06:53:47 GMT eliiser 2014-12-18T06:53:47Z How to detect a USB cable was connected to my device? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358356#M18046 <HTML><HEAD></HEAD><BODY><P>We're using a K60 with our own HW, but it applies to TOWER boards as well. We are working as a device only, and the computer is the host, with a CDC driver.</P><P>How to detect that a USB cable has been connected to the device? The other side can either be a computer or a charger. With a computer on the other end it's fairly simple - there are various interrupts and messages sent to the USB stack which we can use.</P><P>But when connecting to a USB charger (a simple power supply with a USB jack) we only see a SLEEP interrupt and no message (which is to be expected). From the description of the SLEEP interrupt (in USB0_ISTAT) it doesn't look like it's the correct way to identify USB connection.</P><P>Is there some other interrupt/register that can tell us only that the USB cable is connected to something?</P></BODY></HTML> Wed, 17 Dec 2014 12:11:08 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358356#M18046 eliiser 2014-12-17T12:11:08Z Re: How to detect a USB cable was connected to my device? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358357#M18047 <HTML><HEAD></HEAD><BODY><P>Hello Eli:</P><P></P><P>For this purpose you have to connect <STRONG>VBUS</STRONG> line to a 5V tolerant GPIO pin and use that pin to detect when a Host cable is connected to your device. This is because K60 does not have an active register that indicates when VBUS is present.</P><P><BR />Regards!,<BR />Jorge Gonzalez</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 18 Dec 2014 02:39:07 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358357#M18047 Jorge_Gonzalez 2014-12-18T02:39:07Z Re: How to detect a USB cable was connected to my device? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358358#M18048 <HTML><HEAD></HEAD><BODY><P>Hello Jorge,</P><P></P><P>Thank you very much for the reply!</P></BODY></HTML> Thu, 18 Dec 2014 06:53:47 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-detect-a-USB-cable-was-connected-to-my-device/m-p/358358#M18048 eliiser 2014-12-18T06:53:47Z