topic USB ROM API - How to deinit USB ROM Code? in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/USB-ROM-API-How-to-deinit-USB-ROM-Code/m-p/523641#M6277 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by cneubert on Mon Jan 11 07:29:01 MST 2016</STRONG><BR /><SPAN>In my application I can send a command over USB and then my application will jump to my bootloader. In my bootloader I also want to be able to receive commands over USB, but I can´t get it working this way.</SPAN><BR /><BR /><SPAN>I have a bootloader which can receive commands over USB (this works without flaws). The bootloader jumps to my application and there I can also receive commands over USB.</SPAN><BR /><SPAN>But when I then jump from my application to my bootloader, USB wont work anymore. Windows reports me an USB device which is not identified.</SPAN><BR /><BR /><SPAN>So every part of my bootloader works if I jump from my application back to it, but not USB. USB is working when I power up my device and the bootloader first starts.</SPAN><BR /><BR /><SPAN>So I think that I miss something when deiniting USB when I jump from my application to my bootloader. Although it seems it doesn´t matter when jumping from bootloader to application as USB there is working.</SPAN><BR /><BR /><SPAN>Does anyone have an idea what´s wrong? Has anyone implemented USB in his bootloader and also in his application?</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:46:06 GMT lpcware 2016-06-15T16:46:06Z USB ROM API - How to deinit USB ROM Code? https://community.nxp.com/t5/LPC-Microcontrollers/USB-ROM-API-How-to-deinit-USB-ROM-Code/m-p/523641#M6277 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by cneubert on Mon Jan 11 07:29:01 MST 2016</STRONG><BR /><SPAN>In my application I can send a command over USB and then my application will jump to my bootloader. In my bootloader I also want to be able to receive commands over USB, but I can´t get it working this way.</SPAN><BR /><BR /><SPAN>I have a bootloader which can receive commands over USB (this works without flaws). The bootloader jumps to my application and there I can also receive commands over USB.</SPAN><BR /><SPAN>But when I then jump from my application to my bootloader, USB wont work anymore. Windows reports me an USB device which is not identified.</SPAN><BR /><BR /><SPAN>So every part of my bootloader works if I jump from my application back to it, but not USB. USB is working when I power up my device and the bootloader first starts.</SPAN><BR /><BR /><SPAN>So I think that I miss something when deiniting USB when I jump from my application to my bootloader. Although it seems it doesn´t matter when jumping from bootloader to application as USB there is working.</SPAN><BR /><BR /><SPAN>Does anyone have an idea what´s wrong? Has anyone implemented USB in his bootloader and also in his application?</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:46:06 GMT https://community.nxp.com/t5/LPC-Microcontrollers/USB-ROM-API-How-to-deinit-USB-ROM-Code/m-p/523641#M6277 lpcware 2016-06-15T16:46:06Z