topic Why? Help,THANKS! in S12 / MagniV Microcontrollers https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291396#M10191 <HTML><HEAD></HEAD><BODY><P># define&nbsp; BUS&nbsp;&nbsp; (48000000)</P><P># define&nbsp; PRE&nbsp; (64)</P><P># define&nbsp; CLK&nbsp;&nbsp;&nbsp; ( BUS / (10000*PRE) )</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>main()</P><P>{</P><P>&nbsp;&nbsp;&nbsp;&nbsp; unsigned int&nbsp; A;</P><P>&nbsp;&nbsp;&nbsp;&nbsp; A= CLK;</P><P>}</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>******************************************</P><P>result:&nbsp;&nbsp; A=CLK= 62411,&nbsp;&nbsp;&nbsp; why? Help,Thank you!</P></BODY></HTML> Tue, 30 Apr 2013 13:29:57 GMT lihao 2013-04-30T13:29:57Z Why? Help,THANKS! https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291396#M10191 <HTML><HEAD></HEAD><BODY><P># define&nbsp; BUS&nbsp;&nbsp; (48000000)</P><P># define&nbsp; PRE&nbsp; (64)</P><P># define&nbsp; CLK&nbsp;&nbsp;&nbsp; ( BUS / (10000*PRE) )</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>main()</P><P>{</P><P>&nbsp;&nbsp;&nbsp;&nbsp; unsigned int&nbsp; A;</P><P>&nbsp;&nbsp;&nbsp;&nbsp; A= CLK;</P><P>}</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>******************************************</P><P>result:&nbsp;&nbsp; A=CLK= 62411,&nbsp;&nbsp;&nbsp; why? Help,Thank you!</P></BODY></HTML> Tue, 30 Apr 2013 13:29:57 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291396#M10191 lihao 2013-04-30T13:29:57Z Re: Why? Help,THANKS! https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291397#M10192 <HTML><HEAD></HEAD><BODY><P>(int)10000 * (int)64 = (int)0xC400 = (int)-15360</P><P></P><P>(long)48000000 / (int)-15360 = -3125</P><P></P><P>(unsigned int)-3125 = 0xF3CB = 62411</P><P></P><P></P><P>Some UL's or typecasts are missing, try this:</P><P></P><P># define&nbsp; BUS&nbsp;&nbsp; (48000000ul)</P><P># define&nbsp; CLK&nbsp;&nbsp;&nbsp; ( BUS / (10000ul*PRE) )</P><P><SPAN class="mce_paste_marker"></SPAN></P></BODY></HTML> Tue, 30 Apr 2013 14:11:52 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291397#M10192 kef 2013-04-30T14:11:52Z Re: Why? Help,THANKS! https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291398#M10193 <HTML><HEAD></HEAD><BODY><P>Thanks you very much!&nbsp;&nbsp; Best wishes for you!</P></BODY></HTML> Tue, 30 Apr 2013 15:18:21 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/Why-Help-THANKS/m-p/291398#M10193 lihao 2013-04-30T15:18:21Z