MQX Software SolutionsのトピックRecommended MQX interrupt levels https://community.nxp.com/t5/MQX-Software-Solutions/Recommended-MQX-interrupt-levels/m-p/172049#M2011 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>&nbsp;</P><P>I'm working on custom K53 board using MQX 3.8, MFS, RTCS, USB Device, LPM active, I2C and SPI.</P><P>&nbsp;</P><P>Since I'm working on battery powered device I need to save power and hence do clock switching (internal vs external) and turning things on and off all the time. My setup seems to be working relatively well. But...</P><P>&nbsp;</P><P>Looks like after while Timer task is stuck and LW Semaphore TIMER_ISR_LWSEM keeps counting but timer task is stuck.</P><P>Have been browsing this forum and found posts "possible scheduler bug in MQX 3.7" and "Ready task not entered" helpful. <A __default_attr="99232" class="jive_macro jive_macro_thread default_title" href="https://community.freescale.com/thread/99232" jivemacro="thread" title="https://community.freescale.com/thread/99232">https://community.freescale.com/thread/99232</A></P><P>&nbsp;</P><P>I'm using pretty much "inherited" interrupt levels from twrk53n512.h. For example I2C interrupt levels are 1 which is same that one set for the timer ISR. So, assuming that interrupt priority levels are the source of the problem.</P><P>Just wondering what would be recommended Interrupt priorities for the MQX?</P><P>Timer 1, I2C and ports 3 other ones 4-5? Something else?</P><P>&nbsp;</P></BODY></HTML> Thu, 14 Jun 2012 20:43:10 GMT kaskasi 2012-06-14T20:43:10Z Recommended MQX interrupt levels https://community.nxp.com/t5/MQX-Software-Solutions/Recommended-MQX-interrupt-levels/m-p/172049#M2011 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P>&nbsp;</P><P>I'm working on custom K53 board using MQX 3.8, MFS, RTCS, USB Device, LPM active, I2C and SPI.</P><P>&nbsp;</P><P>Since I'm working on battery powered device I need to save power and hence do clock switching (internal vs external) and turning things on and off all the time. My setup seems to be working relatively well. But...</P><P>&nbsp;</P><P>Looks like after while Timer task is stuck and LW Semaphore TIMER_ISR_LWSEM keeps counting but timer task is stuck.</P><P>Have been browsing this forum and found posts "possible scheduler bug in MQX 3.7" and "Ready task not entered" helpful. <A __default_attr="99232" class="jive_macro jive_macro_thread default_title" href="https://community.freescale.com/thread/99232" jivemacro="thread" title="https://community.freescale.com/thread/99232">https://community.freescale.com/thread/99232</A></P><P>&nbsp;</P><P>I'm using pretty much "inherited" interrupt levels from twrk53n512.h. For example I2C interrupt levels are 1 which is same that one set for the timer ISR. So, assuming that interrupt priority levels are the source of the problem.</P><P>Just wondering what would be recommended Interrupt priorities for the MQX?</P><P>Timer 1, I2C and ports 3 other ones 4-5? Something else?</P><P>&nbsp;</P></BODY></HTML> Thu, 14 Jun 2012 20:43:10 GMT https://community.nxp.com/t5/MQX-Software-Solutions/Recommended-MQX-interrupt-levels/m-p/172049#M2011 kaskasi 2012-06-14T20:43:10Z