Contents [ hide ]. If one-shot mode is enabled, then the sequencer will only be scheduled one time the sequencer HW will automatically disable the StepEnable bit after it is scheduled which will guarantee only one sample is taken per channel. Navigation menu Personal tools Log in Request account. It should be noted, that the noise level on these pins might be higher than on the dedicated ADC input signals, as these are routed as digital signals on the module. This page was last modified on 18 April , at By just enabling the buffer ADC switches to continuous mode.
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Copyright Product page More documentation. The ADC channels are only 1.
Analog-to-Digital Converter (ADC)
These four analogue inputs are compatible within the Colibri family and are dedicated ADC inputs. The necessary driver support is available with version 2.
Contents [ hide ]. Keep in mind that opening and closing a file for every ADC read-out is relatively slow and rather resource intensive. If one-shot mode is enabled, then the sequencer will only be scheduled one time the sequencer HW will automatically disable the StepEnable bit after it is scheduled which will guarantee only one sample is taken per channel.
By just enabling the buffer ADC switches to continuous mode. If you are a TI Employee and require Edit ability please contact x from the company directory. This is a limitation of the i.
For further information on expansion header layout please refer to the Beaglebone schematics here. When the user wants to continuously take samples, continuous mode needs to be enabled.
This page has been accessed 36, times. For BSP versions 2. Platform driver mapping The ADC drivers are located at: The ADC drivers only support “one-shot” mode. To determine which entry imxx to which driver read the name descriptor with:. You can find the source code for ADC here. The ADC samples the analog signal when “start of conversion” signal is high and continues sampling 1 clock cycle after the falling edge.
An analog-to-digital converter abbreviated ADC is a device that uses sampling to convert a continuous quantity to a discrete time representation in digital form. Both ADC controllers are bit i,x, right justified, unsigned format.
Views Read View source View history. However the internal ADCs are anyway not meant to be used for high speed applications.
The parameter “ti,adc-channels” needs to hold data related to which channels you want to use for ADC. ADC channel mapping The i. Read the input value of a channel with:.
IMX.6UL ADC example program | NXP Community
Please note as of Wednesday, August 15th, this wiki has been set to read only. The STMPE supports up to 8 analogue inputs, however, input are used for the resistive touchscreen interface. We created a test program to show how the driver can be used, see adc-test.
These options are enabled as built-in on the default ConnectCore 6UL kernel configuration file. The generic sdc code present ixm Linux kernel source tree can be used to test the continuous sampling functionality. ADC, Sitara, Touch screen.
Linux source code: drivers/iio/adc/vf_adc.c (v) – Bootlin
You will only need to specify the IIO driver. For technical support please post your questions at immx Digi Embedded Yocto version 2. Read the input value of a channel with: The device tree must contain entries for: