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--- resources:tools-software:linux-drivers:iio-dac:ad5676 [10 Jan 2019 13:37] – [Files] Mircea Caprioru
+++ resources:tools-software:linux-drivers:iio-dac:ad5676 [20 Nov 2020 10:32] (current) – [Status] Alexandru Ardelean
@@ Line 1: / Line 1: @@
-====== AD5676 IIO DAC Linux Driver ======
+====== nanoDAC+ IIO DAC Linux Driver ======
 ===== Supported Devices =====
@@ Line 8: / Line 8: @@
   * [[adi>AD5671R]]
   * [[adi>AD5672R]]
+  * [[adi>AD5673R]]
   * [[adi>AD5674R]]
   * [[adi>AD5675R]]
   * [[adi>AD5676]]
   * [[adi>AD5676R]]
+  * [[adi>AD5677R]]
   * [[adi>AD5679R]]
   * [[adi>AD5683R]]
@@ Line 33: / Line 35: @@
 ===== Evaluation Boards =====
+  * [[adi>EVAL-AD5677RSDZ]]
   * [[adi>EVAL-AD5679RSDZ]]
   * [[adi>EVAL-AD5683RSDZ]]
@@ Line 50: / Line 53: @@
 ^ Source ^ Mainlined? ^
-| [[https://github.com/analogdevicesinc/linux/blob/rpi-4.9.y/drivers/iio/dac/|git]] | [No] |
+| [[https://github.com/analogdevicesinc/linux/blob/master/drivers/iio/dac/|git]] | [[https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/iio/dac/|Yes]] |
 ===== Files =====
@@ Line 68: / Line 71: @@
   * spi-cpol: Needs to be set for the correct SPI mode
   * vcc-supply: Phandle to the fixed regulator
+  * interrupts: the interrupt used for buffer sampling
+  * pwms: pwm pin used as the interrupt source
 <code>
@@ Line 88: / Line 93: @@
 		spi-cpha;
 		vcc-supply = <&adc_vref>;
+             interrupts = <25 IRQ_TYPE_EDGE_RISING>;
+             interrupt-parent = <&gpio>;
+             pwms = <&pwm 0 100>;
+             pwm-names = "pwm-trigger";
 	};
 </code>
@@ Line 95: / Line 106: @@
   * reg: The chipselect number used for the device
   * vcc-supply: Phandle to the fixed regulator
+  * interrupts: the interrupt used for buffer sampling
+  * pwms: pwm pin used as the interrupt source
 <code>
@@ Line 113: / Line 126: @@
 		    reg = <0xe>;
 		    vcc-supply = <&adc_vref>;
+                 interrupts = <25 IRQ_TYPE_EDGE_RISING>;
+                 interrupt-parent = <&gpio>;
+                 pwms = <&pwm 0 100>;
+                 pwm-names = "pwm-trigger";
 	};
 </code>
@@ Line 127: / Line 146: @@
 root:/sys/bus/iio/devices/iio:device0> **ls -l**
--r--r--r-- 1 root root 4096 Nov 11 12:03 dev
+drwxr-xr-x 2 root root    0 Jul 31 15:17 buffer
--r--r--r-- 1 root root 4096 Nov 11 12:03 name
+-r--r--r-- 1 root root 4096 Jul 31 15:17 dev
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage0_powerdown
+-r--r--r-- 1 root root 4096 Jul 31 15:17 name
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage0_powerdown_mode
+lrwxrwxrwx 1 root root    0 Jul 31 15:17 of_node -> ../../../../../../../../firmware/devicetree/base/soc/spi@7e204000/ad5679r@0
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage0_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage0_powerdown
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage1_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage0_powerdown_mode
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage1_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage0_raw
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage1_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage10_powerdown
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage2_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage10_powerdown_mode
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage2_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage10_raw
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage2_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage11_powerdown
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage3_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage11_powerdown_mode
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage3_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage11_raw
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage3_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage12_powerdown
--r--r--r-- 1 root root 4096 Nov 11 12:03 out_voltage_powerdown_mode_available
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage12_powerdown_mode
--rw-r--r-- 1 root root 4096 Nov 11 12:03 out_voltage_scale
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage12_raw
-drwxr-xr-x 2 root root    0 Nov 11 12:03 power
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage13_powerdown
-lrwxrwxrwx 1 root root    0 Nov 11 12:03 subsystem -> ../../../../../../../bus/iio
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage13_powerdown_mode
--rw-r--r-- 1 root root 4096 Nov 11 12:03 uevent
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage13_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage14_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage14_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage14_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage15_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage15_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage15_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage1_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage1_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage1_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage2_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage2_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage2_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage3_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage3_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage3_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage4_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage4_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage4_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage5_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage5_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage5_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage6_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage6_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage6_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage7_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage7_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage7_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage8_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage8_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage8_raw
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage9_powerdown
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage9_powerdown_mode
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage9_raw
+-r--r--r-- 1 root root 4096 Jul 31 15:17 out_voltage_powerdown_mode_available
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage_sampling_frequency
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 out_voltage_scale
+drwxr-xr-x 2 root root    0 Jul 31 15:17 power
+drwxr-xr-x 2 root root    0 Jul 31 15:17 scan_elements
+lrwxrwxrwx 1 root root    0 Jul 31 15:17 subsystem -> ../../../../../../../../bus/iio
+drwxr-xr-x 2 root root    0 Jul 31 15:17 trigger
+-rw-r--r-- 1 root root 4096 Jul 31 15:17 uevent
 </xterm></WRAP>
@@ Line 238: / Line 298: @@
 </xterm></WRAP>
+====== Buffer Support ======
+**Description:**\\
+The nanoDAC family of devices has buffer support for changing the output of the DAC channels. To achieve this a PWM signal is used as the device trigger to output data. Using a sampling frequency attribute the period of the PWM signal can be changed. The sampling frequency is in Hz.
+<note important>In order to use this functionality the **interrupt** pin must be tied to the **PWM** generation pin</note>
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root@analog:/sys/bus/iio/devices/iio:device0 $ cat out_voltage_sampling_frequency
+root@analog:/sys/bus/iio/devices/iio:device0# echo 2000 > out_voltage_sampling_frequency
+root@analog:/sys/bus/iio/devices/iio:device0# cat out_voltage_sampling_frequency
+</xterm></WRAP>
+== Enable buffered channels ==
+**Description:**\\
+The user has to enable on what channels to output the buffer samples. The samples are interleaved in the following in the order of the enabled channels.
+**Example:**\\
+<note tip>**sample_ch0|sample_ch1|sample_ch2**</note>
+If only channel 1 is enabled the buffer samples will have the following configuration:
+<note tip>**sample_ch1|sample_ch1|sample_ch1**</note>
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root@analog:/sys/bus/iio/devices/iio:device0# cd scan_elements/
+root@analog:/sys/bus/iio/devices/iio:device0/scan_elements# ls
+out_voltage0_en      out_voltage10_type   out_voltage12_index  out_voltage14_en     out_voltage15_type	out_voltage2_index  out_voltage4_en	out_voltage5_type   out_voltage7_index	out_voltage9_en
+out_voltage0_index   out_voltage11_en	  out_voltage12_type   out_voltage14_index  out_voltage1_en	out_voltage2_type   out_voltage4_index	out_voltage6_en     out_voltage7_type	out_voltage9_index
+out_voltage0_type    out_voltage11_index  out_voltage13_en     out_voltage14_type   out_voltage1_index	out_voltage3_en     out_voltage4_type	out_voltage6_index  out_voltage8_en	out_voltage9_type
+out_voltage10_en     out_voltage11_type   out_voltage13_index  out_voltage15_en     out_voltage1_type	out_voltage3_index  out_voltage5_en	out_voltage6_type   out_voltage8_index
+out_voltage10_index  out_voltage12_en	  out_voltage13_type   out_voltage15_index  out_voltage2_en	out_voltage3_type   out_voltage5_index	out_voltage7_en     out_voltage8_type
+root@analog:/sys/bus/iio/devices/iio:device0/scan_elements# echo 1 > out_voltage0_en
+root@analog:/sys/bus/iio/devices/iio:device0/scan_elements# cd ../buffer/
+root@analog:/sys/bus/iio/devices/iio:device0/buffer# ls
+data_available	enable	length	watermark
+root@analog:/sys/bus/iio/devices/iio:device0/buffer# echo 1 > enable
+</xterm></WRAP>
+**Sending a buffer sample example:**\\
+<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
+<xterm>
+root@analog:/sys/bus/iio/devices/iio:device0/buffer# echo -n -e '\x22\x33' > /dev/iio\:device0
+</xterm></WRAP>

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