Kinetis Software Development KitのトピックIs USB_DeviceCdcVcomCallback() inside an interrupt routine? https://community.nxp.com/t5/Kinetis-Software-Development-Kit/Is-USB-DeviceCdcVcomCallback-inside-an-interrupt-routine/m-p/485114#M4244 <HTML><HEAD></HEAD><BODY><P>The situation is that I'm am adapting the example in C:\KSDK2\boards\frdmk22f\usb_examples\usb_device_cdc_vcom to run with/under FreeRTOS. As it is written, the background routine polls for input. What I'd like to do is link the background routine to the callback() routine with a semaphore to indicate that data is ready to be read.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>So, inside the callback() routine, should I use the xSemaphhoreGiveFromISR() or the xSemaphhoreGive() routine?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thanks</P></BODY></HTML> Wed, 27 Apr 2016 20:51:55 GMT davepfaltzgraff 2016-04-27T20:51:55Z Is USB_DeviceCdcVcomCallback() inside an interrupt routine? https://community.nxp.com/t5/Kinetis-Software-Development-Kit/Is-USB-DeviceCdcVcomCallback-inside-an-interrupt-routine/m-p/485114#M4244 <HTML><HEAD></HEAD><BODY><P>The situation is that I'm am adapting the example in C:\KSDK2\boards\frdmk22f\usb_examples\usb_device_cdc_vcom to run with/under FreeRTOS. As it is written, the background routine polls for input. What I'd like to do is link the background routine to the callback() routine with a semaphore to indicate that data is ready to be read.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>So, inside the callback() routine, should I use the xSemaphhoreGiveFromISR() or the xSemaphhoreGive() routine?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thanks</P></BODY></HTML> Wed, 27 Apr 2016 20:51:55 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/Is-USB-DeviceCdcVcomCallback-inside-an-interrupt-routine/m-p/485114#M4244 davepfaltzgraff 2016-04-27T20:51:55Z Re: Is USB_DeviceCdcVcomCallback() inside an interrupt routine? https://community.nxp.com/t5/Kinetis-Software-Development-Kit/Is-USB-DeviceCdcVcomCallback-inside-an-interrupt-routine/m-p/485115#M4245 <HTML><HEAD></HEAD><BODY><P>Hi David, </P><P></P><P>is highly recommended to use<STRONG> xSemaphhoreGiveFromISR()</STRONG> instead of xSemaphhoreGive().</P><P>If you use xSemaphhoreGive() you could get in trouble because of race conditions.</P><P></P><P>I hope this helps.</P><P>Best Regards,</P><P>Iva</P></BODY></HTML> Mon, 09 May 2016 11:40:50 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/Is-USB-DeviceCdcVcomCallback-inside-an-interrupt-routine/m-p/485115#M4245 ivadorazinova 2016-05-09T11:40:50Z