topic overflow interrupt?? in S12 / MagniV Microcontrollers https://community.nxp.com/t5/S12-MagniV-Microcontrollers/overflow-interrupt/m-p/132146#M1661 <HTML><HEAD></HEAD><BODY><DIV>hello</DIV><DIV>&nbsp;</DIV><DIV>I use a MC9S12A256B microcontroller with codewarrior.</DIV><DIV>I use the microcontroller to interface a compactflash card to a Digital analog converter.</DIV><DIV>My routine turn correctly but I want to timing it.</DIV><DIV>actually the rythm of the transfert depend of the number of lignes in my program.</DIV><DIV>I want to regulate it by a software timing.</DIV><DIV>&nbsp;</DIV><DIV>I want to enter in a interrupt software every 5us, but I don't understand the principe of the overflow timer (I think I must use it to do this regulation).</DIV><DIV>&nbsp;</DIV><DIV>Can someone help me to do this or guide me to a other solution.</DIV><DIV>&nbsp;</DIV><DIV>I precise that must using the SCI interface in the same time.</DIV><DIV>&nbsp;</DIV><DIV>Thanks for your assistance.</DIV><DIV>&nbsp;</DIV><DIV>Excuse me for spelling mistakes.</DIV><DIV>&nbsp;</DIV><DIV>&nbsp;</DIV></BODY></HTML> Tue, 11 Apr 2006 14:54:38 GMT gautier 2006-04-11T14:54:38Z overflow interrupt?? https://community.nxp.com/t5/S12-MagniV-Microcontrollers/overflow-interrupt/m-p/132146#M1661 <HTML><HEAD></HEAD><BODY><DIV>hello</DIV><DIV>&nbsp;</DIV><DIV>I use a MC9S12A256B microcontroller with codewarrior.</DIV><DIV>I use the microcontroller to interface a compactflash card to a Digital analog converter.</DIV><DIV>My routine turn correctly but I want to timing it.</DIV><DIV>actually the rythm of the transfert depend of the number of lignes in my program.</DIV><DIV>I want to regulate it by a software timing.</DIV><DIV>&nbsp;</DIV><DIV>I want to enter in a interrupt software every 5us, but I don't understand the principe of the overflow timer (I think I must use it to do this regulation).</DIV><DIV>&nbsp;</DIV><DIV>Can someone help me to do this or guide me to a other solution.</DIV><DIV>&nbsp;</DIV><DIV>I precise that must using the SCI interface in the same time.</DIV><DIV>&nbsp;</DIV><DIV>Thanks for your assistance.</DIV><DIV>&nbsp;</DIV><DIV>Excuse me for spelling mistakes.</DIV><DIV>&nbsp;</DIV><DIV>&nbsp;</DIV></BODY></HTML> Tue, 11 Apr 2006 14:54:38 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/overflow-interrupt/m-p/132146#M1661 gautier 2006-04-11T14:54:38Z Re: overflow interrupt?? https://community.nxp.com/t5/S12-MagniV-Microcontrollers/overflow-interrupt/m-p/132147#M1662 <HTML><HEAD></HEAD><BODY>5 uS is very short, so you certainly do not need the overflow interrupt.<BR /><BR />After you initialize the interrupt for TC0, you can say such as "TC0 = TC0 + 120". The +120 means to flag 5 uS from last time, assuming the timer prescaler is 0 (default) and the bus freq is 24 MHz</BODY></HTML> Fri, 14 Apr 2006 01:28:50 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/overflow-interrupt/m-p/132147#M1662 imajeff 2006-04-14T01:28:50Z