topic How to calculate IIR using fixed-point number? in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-calculate-IIR-using-fixed-point-number/m-p/720399#M44116 <HTML><HEAD></HEAD><BODY><P class="" style="box-sizing: border-box; margin: 0px; padding: 0px; min-height: 18px; line-height: 20px; color: #2e3033; font-family: Arial, 'Microsoft YaHei', 微软雅黑, 宋体, 'Malgun Gothic', Meiryo, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #eef0f2;"><SPAN class="" data-group="0-0" style="box-sizing: border-box; line-height: 20px;">I use KL46 to do IIR filter for data collected by ADC, and IIR filter wants to use fixed point count, KL46 is a supported library?</SPAN></P><P class="" style="box-sizing: border-box; margin: 0px; padding: 0px; min-height: 18px; line-height: 20px; color: #2e3033; font-family: Arial, 'Microsoft YaHei', 微软雅黑, 宋体, 'Malgun Gothic', Meiryo, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #eef0f2;"><SPAN class="" data-group="1-0" style="box-sizing: border-box; line-height: 20px;">The IIR type I use is "Direct From II 4Order"</SPAN></P></BODY></HTML> Fri, 02 Mar 2018 02:35:29 GMT mengxiao 2018-03-02T02:35:29Z How to calculate IIR using fixed-point number? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-calculate-IIR-using-fixed-point-number/m-p/720399#M44116 <HTML><HEAD></HEAD><BODY><P class="" style="box-sizing: border-box; margin: 0px; padding: 0px; min-height: 18px; line-height: 20px; color: #2e3033; font-family: Arial, 'Microsoft YaHei', 微软雅黑, 宋体, 'Malgun Gothic', Meiryo, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #eef0f2;"><SPAN class="" data-group="0-0" style="box-sizing: border-box; line-height: 20px;">I use KL46 to do IIR filter for data collected by ADC, and IIR filter wants to use fixed point count, KL46 is a supported library?</SPAN></P><P class="" style="box-sizing: border-box; margin: 0px; padding: 0px; min-height: 18px; line-height: 20px; color: #2e3033; font-family: Arial, 'Microsoft YaHei', 微软雅黑, 宋体, 'Malgun Gothic', Meiryo, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #eef0f2;"><SPAN class="" data-group="1-0" style="box-sizing: border-box; line-height: 20px;">The IIR type I use is "Direct From II 4Order"</SPAN></P></BODY></HTML> Fri, 02 Mar 2018 02:35:29 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-calculate-IIR-using-fixed-point-number/m-p/720399#M44116 mengxiao 2018-03-02T02:35:29Z Re: How to calculate IIR using fixed-point number? https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-calculate-IIR-using-fixed-point-number/m-p/720400#M44117 <HTML><HEAD></HEAD><BODY><P>Hi Meng,</P><P>There is a CMSIS DSP library in the Kinetis SDK which you can download from <A href="https://mcuxpresso.nxp.com/en/builder">https://mcuxpresso.nxp.com/en/builder</A>. This is a optional component. You must select it before you download SDK. This library is provided by ARM. It&nbsp;is a suite of common signal processing functions for use on Cortex-M processor based devices. IIR is one of its function.</P><P></P><P>Regards,</P><P>Jing</P></BODY></HTML> Mon, 05 Mar 2018 03:18:08 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/How-to-calculate-IIR-using-fixed-point-number/m-p/720400#M44117 jingpan 2018-03-05T03:18:08Z