topic Re: FRDM-KL27 ADC DEMO in Kinetis Software Development Kit https://community.nxp.com/t5/Kinetis-Software-Development-Kit/FRDM-KL27-ADC-DEMO/m-p/654588#M7079 <HTML><HEAD></HEAD><BODY><P>Hi, Mel,</P><P>I suppose that you do not connect the ADC ananlog pin to a GND or VDD or a divider, you have the ADC analog pin float, which leads to the ADC sample indeterminate.</P><P>Pls connect the analog ADC pin to GND or VDD or to a divider, have a try.</P><P>If you still have issue, pls post your code so that we have a review.</P><P>Hope it can help you</P><P>BR</P><P>Xiangjun Rong</P></BODY></HTML> Tue, 09 May 2017 03:47:36 GMT xiangjun_rong 2017-05-09T03:47:36Z FRDM-KL27 ADC DEMO https://community.nxp.com/t5/Kinetis-Software-Development-Kit/FRDM-KL27-ADC-DEMO/m-p/654587#M7078 <HTML><HEAD></HEAD><BODY><P>I am using the frdm-kl27z with adc16 interrupt driver demo to test ADC.<BR />In the debug serial output, when I hold any key, the sample value increased slowly and at last reached 4095.<BR />I changed the sample channel to temp sensor got the same result.<BR />What is the problem in my test. THANKS!</P></BODY></HTML> Mon, 01 May 2017 14:48:00 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/FRDM-KL27-ADC-DEMO/m-p/654587#M7078 profitt 2017-05-01T14:48:00Z Re: FRDM-KL27 ADC DEMO https://community.nxp.com/t5/Kinetis-Software-Development-Kit/FRDM-KL27-ADC-DEMO/m-p/654588#M7079 <HTML><HEAD></HEAD><BODY><P>Hi, Mel,</P><P>I suppose that you do not connect the ADC ananlog pin to a GND or VDD or a divider, you have the ADC analog pin float, which leads to the ADC sample indeterminate.</P><P>Pls connect the analog ADC pin to GND or VDD or to a divider, have a try.</P><P>If you still have issue, pls post your code so that we have a review.</P><P>Hope it can help you</P><P>BR</P><P>Xiangjun Rong</P></BODY></HTML> Tue, 09 May 2017 03:47:36 GMT https://community.nxp.com/t5/Kinetis-Software-Development-Kit/FRDM-KL27-ADC-DEMO/m-p/654588#M7079 xiangjun_rong 2017-05-09T03:47:36Z