topic S08 Input Capture Problem in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/S08-Input-Capture-Problem/m-p/498748#M21959 <HTML><HEAD></HEAD><BODY><P>Hi all. I am using the TPM2 module, set to input capture mode, of a MCU MC9S08JM60 in order to measure the frequency of a rectangular signal. The problem is that I can not get a value by executing the following instructions:</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><PRE class="c++" name="code">TPM2C1DL = TPM2C1VL; TPM2C1DH = TPM2C1VH; TPM2C1DH = TPM2C1DH * 256; TPM2C1D = TPM2C1DL + TPM2C1DH; TPM2C1D = (TPM2C1D * 12) /100000 TPM2C1D&nbsp; = 1/TPM2C1D </PRE><DIV style="display:none;"> </DIV><P>(<SPAN lang="en">All variables are of the type " unsigned short ")</SPAN></P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>The module uses the BUSCLK as reference clock, which previously set in the Bypassed Internal Low Power mode, which understand that the BUSCLK is 32kHz / 2/2 = 8 kHz. What could be happening?.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thanks!</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Martin.</P></BODY></HTML> Tue, 01 Mar 2016 14:11:38 GMT martindiaz 2016-03-01T14:11:38Z S08 Input Capture Problem https://community.nxp.com/t5/8-bit-Microcontrollers/S08-Input-Capture-Problem/m-p/498748#M21959 <HTML><HEAD></HEAD><BODY><P>Hi all. I am using the TPM2 module, set to input capture mode, of a MCU MC9S08JM60 in order to measure the frequency of a rectangular signal. The problem is that I can not get a value by executing the following instructions:</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><PRE class="c++" name="code">TPM2C1DL = TPM2C1VL; TPM2C1DH = TPM2C1VH; TPM2C1DH = TPM2C1DH * 256; TPM2C1D = TPM2C1DL + TPM2C1DH; TPM2C1D = (TPM2C1D * 12) /100000 TPM2C1D&nbsp; = 1/TPM2C1D </PRE><DIV style="display:none;"> </DIV><P>(<SPAN lang="en">All variables are of the type " unsigned short ")</SPAN></P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>The module uses the BUSCLK as reference clock, which previously set in the Bypassed Internal Low Power mode, which understand that the BUSCLK is 32kHz / 2/2 = 8 kHz. What could be happening?.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thanks!</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Martin.</P></BODY></HTML> Tue, 01 Mar 2016 14:11:38 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/S08-Input-Capture-Problem/m-p/498748#M21959 martindiaz 2016-03-01T14:11:38Z