LPC Microcontrollersのトピックhow to measure pwm without ADC? https://community.nxp.com/t5/LPC-Microcontrollers/how-to-measure-pwm-without-ADC/m-p/1071599#M41336 <HTML><HEAD></HEAD><BODY><P>I was wondering if it's possible to use a pin (which is not ADC) to measure pwm i.e battery voltage. If it's possible, how?</P><P>My board is lpc1114/302 and this pin is PIO1_5, which has the function of "capture input", my instinct tells me it has to do with what I need!</P></BODY></HTML> Tue, 07 Jul 2020 10:53:37 GMT esam_me 2020-07-07T10:53:37Z how to measure pwm without ADC? https://community.nxp.com/t5/LPC-Microcontrollers/how-to-measure-pwm-without-ADC/m-p/1071599#M41336 <HTML><HEAD></HEAD><BODY><P>I was wondering if it's possible to use a pin (which is not ADC) to measure pwm i.e battery voltage. If it's possible, how?</P><P>My board is lpc1114/302 and this pin is PIO1_5, which has the function of "capture input", my instinct tells me it has to do with what I need!</P></BODY></HTML> Tue, 07 Jul 2020 10:53:37 GMT https://community.nxp.com/t5/LPC-Microcontrollers/how-to-measure-pwm-without-ADC/m-p/1071599#M41336 esam_me 2020-07-07T10:53:37Z Re: how to measure pwm without ADC? https://community.nxp.com/t5/LPC-Microcontrollers/how-to-measure-pwm-without-ADC/m-p/1071600#M41337 <HTML><HEAD></HEAD><BODY><P>Hi Elmaghrabi Mansour</P><P>&nbsp;</P><P>The MCU has two 32-bit counter/timer and each of these has one 32-bit capture channel that can take a snapshot of the timer value when an input signal transitions. One of the capture input applications is as a pulse width demodulator.</P><P>&nbsp;</P><P>The Capture Control Register (<STRONG>TMR32BnCCR</STRONG>) is used to enable the load of the Capture Register (<STRONG>TMR32BnCR0</STRONG>) with the Timer Counter when a capture event occurs. The capture event can be a rising edge and/or a falling edge in the Capture Signal pin (<STRONG>CT32Bn_CAP0</STRONG>). Also, the Capture Control Register can enable an interrupt generation when the Capture Register is loaded. <STRONG>Chapter 20: 32-bit counter/timer CT32B0/1</STRONG> of the <STRONG>LPC111x/LPC11Cxx User manual</STRONG> has more detailed information about this module.</P><P>&nbsp;</P><P>Please tell me if you need any more information.</P><P></P><P>Regards</P><P>Jose</P></BODY></HTML> Thu, 09 Jul 2020 20:34:06 GMT https://community.nxp.com/t5/LPC-Microcontrollers/how-to-measure-pwm-without-ADC/m-p/1071600#M41337 nxf63973 2020-07-09T20:34:06Z