AS1531 - Revision history

JulienB at 18:13, 12 February 2013

2013-02-12T18:13:54Z

2013-02-12T13:04:57Z

‎Read channels value

2013-02-12T13:03:45Z

‎Connecting chip on APF boards

2013-02-12T13:02:34Z

‎Driver

2013-02-12T13:01:31Z

‎Introduction

2011-10-07T14:23:14Z

2011-10-07T14:19:36Z

‎Soldering

2011-10-07T14:17:56Z

‎read values

2011-10-07T14:16:59Z

‎modprobe

2011-10-07T14:14:33Z

‎Introduction

← Older revision		Revision as of 18:13, 12 February 2013
Line 85:		Line 85:
	[[Category:Linux drivers]]		[[Category:Linux drivers]]
	[[Category:Analog to Digital Converter]]		[[Category:Analog to Digital Converter]]
		+
		+	==Examples==
		+	* Script to read all values each 500ms and display them on console:
		+	<source lang="bash">
		+	#!/bin/sh
		+
		+	modprobe as1531
		+
		+	loop=1
		+	while [ "$loop" == 1 ]; do
		+	for i in 0 1 2 3 4 5 6 7; do
		+	value=`cat /sys/bus/spi/devices/spi0.0/in"$i"_input`
		+	echo -n "$value "
		+	done
		+	usleep 500000 # 500ms
		+	echo
		+	done
		+	</source>

@@ Line 77: / Line 77: @@
 To read adc value just «cat» an input :
 <pre class="apf">
 # cat in5_input
 </pre>

@@ Line 5: / Line 5: @@
 == Connecting chip on APF boards ==
-On the [[APF51Dev]], the AS1531 is connected to the SPI1 bus by default, so you can move to next chapter.
+* On the [[APF51Dev]], the AS1531 is connected to the SPI1 bus by default, so you can move to [[AS1531#Use_it|next chapter]].
+* On the [[APF27Dev]] board it can be soldered on SPI3 bus, which is available on connector J8.
 On the [[APF27Dev]] board it can be soldered on SPI3 bus, which is available on connector J8.
 {| class="wikitable" style="text-align:center; width:50%;"

@@ Line 30: / Line 30: @@
 == Driver ==
-Driver is by default included if you choose an [[APF51]] as target.
+* Driver is by default included if you choose an [[APF51]] as target.
+* Otherwise, you can select it that way:
 Otherwise, you can select it that way:
 <pre class="host">
-[  ] $ make linux26-menuconfig
+$ make linux-menuconfig
 </pre>
@@ Line 44: / Line 43: @@
 </pre>
-Then compile the distribution :
+* Then rebuild the Linux and rootfs images:
 <pre class="host">
-[  ] $ make linux26 && make
+$ make linux && make
 </pre>

@@ Line 1: / Line 1: @@
 == Introduction ==
-AS1531 is a 12bits 8 channels Analog to Digital Converter made by [http://www.austriamicrosystems.com/ Austriamicrosystem]. Its use a SPI bus to communicate with a master microprocessor. The driver is included in ARMadeus distribution and can be used with the APF51Dev board.
+AS1531 is a 12bits 8 channels Analog to Digital Converter made by [http://www.austriamicrosystems.com/ Austriamicrosystem]. Its use a SPI bus to communicate with a master microprocessor. A driver is included in the Armadeus BSP/SDK and can be used on the APF51Dev board.
 == Connecting chip on APF boards ==

@@ Line 3: / Line 3: @@
 AS1531 is a 8 channels 12bits Analog to Digital Converter made by [http://www.austriamicrosystems.com/ Austriamicrosystem]. The driver is included in ARMadeus distribution and can be used with the APF51Dev board.
-== Soldering ==
+== Connecting chip on APF boards ==
 AS1531 chip use a SPI bus to communicate with the microprocessor, then to use it on APFx board it must be connected to a SPI bus.

@@ Line 61: / Line 61: @@
 </pre>
-=== read values ===
+=== Read channels value ===
 <pre class="apf">

@@ Line 54: / Line 54: @@
 {{Warning|AS1531 is used with internal reference voltage of 2,5V, so DO NOT TRY to acquire signals with greater voltage range.}}
-=== modprobe ===
+=== Load driver ===
-To use the ADC, first load hwmon and as1531 modules:
+To use the AS1531, first load ''as1531'' module:
 <pre class="apf">
 # modprobe as1531
 </pre>