topic Re: LPCOpen MRT sample errors in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-MRT-sample-errors/m-p/514552#M760 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by LabRat on Wed Jan 07 21:11:00 MST 2015</STRONG><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: R2D2</STRONG><BR />I'm not sure why these timers are 24bit in a 32bit world, but obviously that's still surprising&nbsp; :~</SPAN><HR /><BR /><BR /><SPAN>No bits leftover after including 48bit RIT&nbsp; :D </SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:13:15 GMT lpcware 2016-06-15T17:13:15Z LPCOpen MRT sample errors https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-MRT-sample-errors/m-p/514551#M759 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by R2D2 on Wed Jan 07 00:08:56 MST 2015</STRONG><BR /><SPAN>LPCXpresso LPC1549 board LPCOpen V2.08c - periph_mrt sample is including several inversion errors...</SPAN><BR /><BR /><SPAN>Wrong:</SPAN><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE>setupMRT(2, MRT_MODE_ONESHOT, 2);/* Will fire in 0.5 seconds */ ... setupMRT(0, MRT_MODE_REPEAT, 2);/* 2Hz rate */ </PRE> </TD></TR></TBODY></TABLE><BR /><SPAN>Corrected:</SPAN><BR /><TABLE border="1"><TBODY><TR><TD bgcolor="#cacaca"> <PRE>setupMRT(2, MRT_MODE_ONESHOT, 2);/* Will [color=#f00]not[/color] fire in 0.5 seconds */ ... setupMRT(0, MRT_MODE_REPEAT, 2);/* [color=#f00]no[/color] 2Hz rate */ </PRE> </TD></TR></TBODY></TABLE><BR /><BR /><SPAN>Surprisingly enough, setting interval time to (MainClockRate / 2) isn't working&nbsp; :(( </SPAN><BR /><BR /><SPAN>Instead expected 72E6 / 2 = 36E6 interval timer is set to 2445568 (= 36E6 AND 0xFFFFFF) , causing a 29 Hz rate&nbsp; <SPAN class="lia-unicode-emoji" title=":winking_face:"><LI-EMOJI id="lia_winking-face" title=":winking_face:"></LI-EMOJI></SPAN> </SPAN><BR /><BR /><SPAN>I'm not sure why these timers are 24bit in a 32bit world, but obviously that's still surprising&nbsp; :~ </SPAN><BR /><BR /></BODY></HTML> Wed, 15 Jun 2016 17:13:14 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-MRT-sample-errors/m-p/514551#M759 lpcware 2016-06-15T17:13:14Z Re: LPCOpen MRT sample errors https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-MRT-sample-errors/m-p/514552#M760 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by LabRat on Wed Jan 07 21:11:00 MST 2015</STRONG><BR /><HR /><SPAN style="color: #0000ff;"><STRONG>Quote: R2D2</STRONG><BR />I'm not sure why these timers are 24bit in a 32bit world, but obviously that's still surprising&nbsp; :~</SPAN><HR /><BR /><BR /><SPAN>No bits leftover after including 48bit RIT&nbsp; :D </SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 17:13:15 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPCOpen-MRT-sample-errors/m-p/514552#M760 lpcware 2016-06-15T17:13:15Z