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--- resources:tools-software:linux-drivers:iio-adc:ad7768 [05 Jul 2018 14:12]
Stefan Popa Source Code
+++ resources:tools-software:linux-drivers:iio-adc:ad7768 [05 Jul 2018 15:07] (current)
Stefan Popa More Information
@@ Line 22: / Line 22: @@
 ^ Source ^ Mainlined? ^
 | [[linux.github>master/drivers/iio/adc/ad7768.c|git]] | [In progress...] |
+===== Files =====
+^ Function ^ File ^
+| driver  | [[linux.github>master/drivers/iio/adc/ad7768.c]] |
+| devicetree bindings | [[linux.github>master?Documentation/devicetree/bindings/iio/adc/adi,ad7768.txt | Documentation/devicetree/bindings/iio/adc/adi,ad7768.txt]] |
+| hdl project | [[https://github.com/analogdevicesinc/hdl/tree/hdl_2017_r1/projects/ad7768evb | hdl]] |
+====== Example Linux Device-Tree Initialization ======
+Required properties:
+  * compatible: Must be one of "adi,ad7768".
+  * reg: SPI chip select number for the device.
+  * spi-max-frequency: See Documentation/devicetree/bindings/spi/spi-bus.txt.
+  * dmas: DMA specifier, consisting of a phandle to DMA controller node.
+  * dma-names: Must be "rx".
+  * vref-supply: phandle to the regulator for ADC reference voltage.
+^ Function ^ File ^
+| AD7768 Device Tree  | [[linux.github>master?arch/arm/boot/dts/zynq-zed-adv7511-ad7768.dts
+| zynq-zed-adv7511-ad7768.dts]] |
+====== Driver testing ======
+{{page>software:linux:docs:iio:iio_snippets#iio device files&noheader&firstseconly&noeditbtn}}
+<WRAP top tip round box 60%>**TIP:**
+An example program which uses the interface can be found here:
+  * [[resources:tools-software:linux-software:iio_oscilloscope|IIO Oscilloscope]]
+</WRAP>\\
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root:/> **cd /sys/bus/iio/devices/**
+root:/sys/bus/iio/devices> ls
+iio:device0
+root:/sys/bus/iio/devices> **cd iio\:device0**
+root:/sys/bus/iio/devices/iio:device0> **ls -l**
+drwxrwxrwx 2 root root    0 Jan  1 00:02 buffer
+-rw-rw-rw- 1 root root 4096 Jan  1 00:02 dev
+-rw-rw-rw- 1 root root 4096 Jan  1 00:02 in_voltage_scale
+-rw-rw-rw- 1 root root 4096 Jan  1 00:02 name
+lrwxrwxrwx 1 root root    0 Jan  1 00:02 of_node -> ../../../../../../../../firmware/devicetree/base/amba/spi@e0006000/adc@0
+drwxrwxrwx 2 root root    0 Jan  1 00:02 power
+drwxrwxrwx 2 root root    0 Jan  1 00:02 scan_elements
+lrwxrwxrwx 1 root root    0 Jan  1 00:02 subsystem -> ../../../../../../../../bus/iio
+-rw-rw-rw- 1 root root 4096 Jan  1 00:02 uevent
+</xterm></WRAP>
+=== Show device name ===
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root:/sys/bus/iio/devices/iio:device0> **cat name**
+ad7768
+</xterm></WRAP>
+=== Show scale ===
+**Description:**\\
+scale to be applied to in_voltage0_raw in order to obtain the measured voltage in millivolts.
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root:/sys/bus/iio/devices/iio:device0> **cat in_voltage_scale **
+.000488281
+</xterm></WRAP>
+====== More Information ======
+{{page>software:linux:docs:iio:iio_snippets#iio pointers&noheader&firstseconly&noeditbtn}}

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