TS-7100-Z ADC: Difference between revisions
From embeddedTS Manuals
(Initial documentation on ADC inputs 1-4) |
m (Lionel moved page TS-7100 ADC to TS-7100-Z ADC: Expect other TS-7100 family members to have different ADCs available.) |
(No difference)
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Revision as of 10:27, 21 April 2022
This board supports four 12-bit ADC inputs using the i.MX6UL CPU's integrated ADC. All of these inputs can sample 0-12VDC or 4-20mA.
These ADCs are accessed through the Linux Industrial I/O Subsystem (IIO), which provides sample rates up to 6ksps across all inputs. The simplest API it offers for slow speed acquisition is via sysfs (/sys):
cat /sys/bus/iio/devices/iio:device0/in_voltage{5,8,9,0}_raw
The pin assignments and names for accessing each ADC input are:
| Schematic Name | i.MX6UL ADC Signal | CN32 Terminal Pin | IIO name |
|---|---|---|---|
| AN_1_STC | ADC1_IN5 | 25 | voltage5 |
| AN_2_STC | ADC1_IN8 | 23 | voltage8 |
| AN_3_STC | ADC1_IN9 | 21 | voltage9 |
| AN_4_STC | ADC1_IN0 | 19 | voltage0 |
See the TS-7100 IO Terminal Block section for a pinout illustration of the header, which is labeled CN32 on the schematic and silkscreen.