topic Map Navigation Handwrite long delayed in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/Map-Navigation-Handwrite-long-delayed/m-p/667933#M102757 <HTML><HEAD></HEAD><BODY><P>Hi community:</P><P>Map Navigation handwrite long delayed.</P><P></P><P>1. custorm board: iMX6 DualLite; BSP-3.10.53 , wayland, Qt5.2.1 , Cypress CY8CTMA touchscreen.</P><P>2. Only the touchscreen are connect to i2c-3. I have measured the interrupt of the touchscreen and sclk/data of the i2c-3 with oscilloscope,&nbsp; Roughly 85 interrupts Per second, it seems normally with the oscilloscope or from the touchscreen dirver log or evtest.</P><P></P><P>Maybe the performance of Qt or something else?&nbsp; This puzzled me for several weeks. Attached with a short video of long delayed handwriting.</P><P></P><P>Any advice would be greatly appreciated</P></BODY></HTML> Wed, 31 May 2017 02:48:57 GMT yunyangsihai 2017-05-31T02:48:57Z Map Navigation Handwrite long delayed https://community.nxp.com/t5/i-MX-Processors/Map-Navigation-Handwrite-long-delayed/m-p/667933#M102757 <HTML><HEAD></HEAD><BODY><P>Hi community:</P><P>Map Navigation handwrite long delayed.</P><P></P><P>1. custorm board: iMX6 DualLite; BSP-3.10.53 , wayland, Qt5.2.1 , Cypress CY8CTMA touchscreen.</P><P>2. Only the touchscreen are connect to i2c-3. I have measured the interrupt of the touchscreen and sclk/data of the i2c-3 with oscilloscope,&nbsp; Roughly 85 interrupts Per second, it seems normally with the oscilloscope or from the touchscreen dirver log or evtest.</P><P></P><P>Maybe the performance of Qt or something else?&nbsp; This puzzled me for several weeks. Attached with a short video of long delayed handwriting.</P><P></P><P>Any advice would be greatly appreciated</P></BODY></HTML> Wed, 31 May 2017 02:48:57 GMT https://community.nxp.com/t5/i-MX-Processors/Map-Navigation-Handwrite-long-delayed/m-p/667933#M102757 yunyangsihai 2017-05-31T02:48:57Z Re: Map Navigation Handwrite long delayed https://community.nxp.com/t5/i-MX-Processors/Map-Navigation-Handwrite-long-delayed/m-p/667934#M102758 <HTML><HEAD></HEAD><BODY><P>Hi yang,</P><P></P><P>Official NXP i.MX6 BSP&nbsp;<SPAN style="color: #51626f; background-color: #ffffff;">Cypress CY8CTMA touchscreen is not currently supported, so I guess the reason fo your delay could be due to the drivers itself, as suggestion check the interrupts times for touch kernel events. calls.</SPAN></P><P></P><P><SPAN style="color: #51626f; background-color: #ffffff;">Hope it helps&nbsp;</SPAN></P><P></P></BODY></HTML> Tue, 06 Jun 2017 16:12:32 GMT https://community.nxp.com/t5/i-MX-Processors/Map-Navigation-Handwrite-long-delayed/m-p/667934#M102758 Bio_TICFSL 2017-06-06T16:12:32Z