https://community.nxp.com/t5/i-MX-Processors/ADC-ETC-initial-delay-units/m-p/1485590#M192252 <P>Hi.</P><P>I'm using the imxrt1052 ADC and ADC_ETC to measure a couple of supply voltages. I would like to add an initial delay so that the voltages stabilize to the ADC input before sampling. There is an <EM>initialDelay</EM> member to the <EM>adc_etc_trigger_config_t</EM> struct but it's not clear what the units are?</P><P>The reference manual says something about 'counter ticks', so I assume this is something to do with the ADC clock? Is there a register I can read this value from so that I can calculate a real delay in microseconds or milliseconds?</P><P>For now I've inserted a delay of 100000000U which is obviously a high number, indicating that whatever units this 'counter' is using, are quite small.</P><P>FYI: There are FETs used to only turn on the input to the ADC when I want to take a measurement, which is why I need a bit of time for the voltage to stabilize before sampling.</P> Wed, 06 Jul 2022 17:41:56 GMT gary_metalle 2022-07-06T17:41:56Z https://community.nxp.com/t5/i-MX-Processors/ADC-ETC-initial-delay-units/m-p/1485590#M192252 <P>Hi.</P><P>I'm using the imxrt1052 ADC and ADC_ETC to measure a couple of supply voltages. I would like to add an initial delay so that the voltages stabilize to the ADC input before sampling. There is an <EM>initialDelay</EM> member to the <EM>adc_etc_trigger_config_t</EM> struct but it's not clear what the units are?</P><P>The reference manual says something about 'counter ticks', so I assume this is something to do with the ADC clock? Is there a register I can read this value from so that I can calculate a real delay in microseconds or milliseconds?</P><P>For now I've inserted a delay of 100000000U which is obviously a high number, indicating that whatever units this 'counter' is using, are quite small.</P><P>FYI: There are FETs used to only turn on the input to the ADC when I want to take a measurement, which is why I need a bit of time for the voltage to stabilize before sampling.</P> Wed, 06 Jul 2022 17:41:56 GMT https://community.nxp.com/t5/i-MX-Processors/ADC-ETC-initial-delay-units/m-p/1485590#M192252 gary_metalle 2022-07-06T17:41:56Z