topic Reinvoke ISP in USB mode in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/Reinvoke-ISP-in-USB-mode/m-p/513862#M395 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by lpcxpressologinname on Tue Sep 08 07:44:16 MST 2015</STRONG><BR /><SPAN>I'm trying to jump back into ISP mode of the rom bootloader.</SPAN><BR /><BR /><SPAN>This is the code I use to activate the bootloader:</SPAN><BR /><SPAN>DISABLE_INTERRUPT();</SPAN><BR /><SPAN>// Reset USB block</SPAN><BR /><SPAN>Chip_SYSCTL_PeriphReset(RESET_USB);</SPAN><BR /><SPAN>Chip_Clock_SetSysClockDiv(1);</SPAN><BR /><SPAN>LPC_WWDT-&gt;TC = 0xFFFFFF;</SPAN><BR /><SPAN>Chip_WWDT_Feed(LPC_WWDT);</SPAN><BR /><SPAN>// re-invoke ISP in USB</SPAN><BR /><SPAN>Chip_IAP_ReinvokeISP(2);</SPAN><BR /><BR /><SPAN>The current CDC disappears, but the massstorage device doesn't appear. Windows or Linux don't recognize the device. If I look into the device it uses PID 0000 and VID 0000. So it seems as if the descriptor isn't correctly filled in.</SPAN><BR /><BR /><SPAN>Anyone any ideas how to make this work?</SPAN></BODY></HTML> Wed, 15 Jun 2016 17:08:56 GMT lpcware 2016-06-15T17:08:56Z Reinvoke ISP in USB mode https://community.nxp.com/t5/LPC-Microcontrollers/Reinvoke-ISP-in-USB-mode/m-p/513862#M395 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by lpcxpressologinname on Tue Sep 08 07:44:16 MST 2015</STRONG><BR /><SPAN>I'm trying to jump back into ISP mode of the rom bootloader.</SPAN><BR /><BR /><SPAN>This is the code I use to activate the bootloader:</SPAN><BR /><SPAN>DISABLE_INTERRUPT();</SPAN><BR /><SPAN>// Reset USB block</SPAN><BR /><SPAN>Chip_SYSCTL_PeriphReset(RESET_USB);</SPAN><BR /><SPAN>Chip_Clock_SetSysClockDiv(1);</SPAN><BR /><SPAN>LPC_WWDT-&gt;TC = 0xFFFFFF;</SPAN><BR /><SPAN>Chip_WWDT_Feed(LPC_WWDT);</SPAN><BR /><SPAN>// re-invoke ISP in USB</SPAN><BR /><SPAN>Chip_IAP_ReinvokeISP(2);</SPAN><BR /><BR /><SPAN>The current CDC disappears, but the massstorage device doesn't appear. Windows or Linux don't recognize the device. If I look into the device it uses PID 0000 and VID 0000. So it seems as if the descriptor isn't correctly filled in.</SPAN><BR /><BR /><SPAN>Anyone any ideas how to make this work?</SPAN></BODY></HTML> Wed, 15 Jun 2016 17:08:56 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Reinvoke-ISP-in-USB-mode/m-p/513862#M395 lpcware 2016-06-15T17:08:56Z