ADC breakout board for pcDuino8 UNO - Revision history

Alvin: /* Description */

2016-07-01T05:36:45Z

‎Description

Alvin: /* Description */

2016-02-23T01:12:11Z

‎Description

Alvin: /* Description */

2016-02-23T01:09:46Z

‎Description

Youkee: /* Quick test */

2016-02-19T06:21:07Z

‎Quick test

Alvin at 05:05, 19 February 2016

2016-02-19T05:05:50Z

Alvin at 04:57, 19 February 2016

2016-02-19T04:57:39Z

Alvin: Created page with " == Description == File:1-97.jpg This ADC breakout board is specially designed for pcDuino8 Uno which has no on-board ADC module. It expands 6 ADC channels using ADI AD7..."

2016-02-19T04:48:23Z

Created page with " == Description == File:1-97.jpg This ADC breakout board is specially designed for pcDuino8 Uno which has no on-board ADC module. It expands 6 ADC channels using ADI AD7..."

New page

== Description ==

[[File:1-97.jpg]]

This ADC breakout board is specially designed for pcDuino8 Uno which has no on-board ADC module. It expands 6 ADC channels using ADI AD7997 12-bit ADC module which provides a I2C-compatible interface.

== Feature ==

* ADI AD7997 12-bit ADC chip
* 10- and 12-bit ADC
* 8 single-ended analog input channels (Only use 6 channels)
* I2C-compatible serial interface
* 3.3V power supply

== Tutorial ==

=== Connect to pcDuino8 Uno ===

* Solder 90° 10-pins headers on J10 of pcDuino8 Uno
* Plug the ADC breakout board into J10 (as shown in the following picture).

[[File:1-98.jpg]]

=== Quick test ===

* Install additional package(s) before use '''pcduino8_uno_lib''' on pcDuino8 Uno <tt>bash sudo apt-get install libi2c-dev i2c-tools</tt>
* Fetch the Arduino lib for pcDuino8 Uno

<tt>bash git clone https://github.com/pcduino/pcduino8_uno_lib</tt> * Clean and Compile the lib: <tt>cd pcduino8_uno_lib make clean make sudo ./output/adc_test</tt> * Input an analog signal on ADC0 channel

[[File:1-99.jpg]]

* The adc_test program will print the value of analog signal on ADC0 channel as default.

=== Create your own source code for ADC ===

Create new .c files in samples folder and modify Makefile to compile it. For example I want to create helloADC.c to read the values from all six ADC channels. * Create <tt>helloADC.c</tt> source file <tt>vim samples/helloADC.c</tt>

<tt>c #include <core.h> int adc_id = 0; void setup() { } void loop() { for(adc_id=0; adc_id<6; adc_id++) { int value = analogRead(adc_id); // get adc value printf("ADC%d value is %d\n",adc_id, value); delay(1000); // wait for one sec } }</tt> * Update Makefile <tt>bash vim samples/makefile</tt> * Add a line after OBJS=… and add the name of your program (without suffix ‘.c’). <tt>makefile OBJS = i2c_rtc_test spi_nfc_test adc_test led_test OBJS += uart_test OBJS += helloADC</tt> * Compile and run: <tt>make sudo output/helloADC</tt> '''Note:''' If you have not used the latest system image for pcDuino8 Uno, you have to add <tt>sudo</tt> to access adc , the following content will tell you how to add permission for user linaro. <tt>bash sudo echo "SUBSYSTEM=="i2cdev", GROUP="i2c"" > /etc/udev/rules.d/90-i2c.rules sudo useradd linaro i2c sudo reboot</tt>

@@ Line 2: / Line 2: @@
 == Description ==
-[[File:1-100.jpg]]
 This ADC breakout board is specially designed for pcDuino8 Uno which has no on-board ADC module. It expands 6 ADC channels using ADI AD7997 12-bit ADC module which provides a I2C-compatible interface.

@@ Line 26: / Line 26: @@
 * Install additional package(s) before use '''pcduino8_uno_lib''' on pcDuino8 Uno
-    bash sudo apt-get install libi2c-dev i2c-tools
+    sudo apt-get install libi2c-dev i2c-tools
 * Fetch the Arduino lib for pcDuino8 Uno
-    bash git clone https://github.com/pcduino/pcduino8_uno_lib
+    git clone https://github.com/pcduino/pcduino8_uno_lib
 * Clean and Compile the lib:

@@ Line 25: / Line 25: @@
 === Quick test ===
-* Install additional package(s) before use '''pcduino8_uno_lib''' on pcDuino8 Uno <tt>bash sudo apt-get install libi2c-dev i2c-tools</tt>
+* Install additional package(s) before use '''pcduino8_uno_lib''' on pcDuino8 Uno
 * Fetch the Arduino lib for pcDuino8 Uno
-<tt>bash git clone https://github.com/pcduino/pcduino8_uno_lib</tt> * Clean and Compile the lib: <tt>cd pcduino8_uno_lib make clean make sudo ./output/adc_test</tt> * Input an analog signal on ADC0 channel
+   bash git clone https://github.com/pcduino/pcduino8_uno_lib
 [[File:1-99.png]]
@@ Line 36: / Line 46: @@
 === Create your own source code for ADC ===
-Create new .c files in samples folder and modify Makefile to compile it. For example I want to create helloADC.c to read the values from all six ADC channels. * Create <tt>helloADC.c</tt> source file <tt>vim samples/helloADC.c</tt>
+Create new .c files in samples folder and modify Makefile to compile it. For example I want to create helloADC.c to read the values from all six ADC channels.
-<tt>c #include <core.h> int adc_id = 0; void setup() { } void loop() {    for(adc_id=0; adc_id<6; adc_id++)    {        int value = analogRead(adc_id); // get adc value        printf("ADC%d value is %d\n",adc_id, value);        delay(1000); // wait for one sec    } }</tt> * Update Makefile <tt>bash vim samples/makefile</tt> * Add a line after OBJS=… and add the name of your program (without suffix ‘.c’). <tt>makefile OBJS = i2c_rtc_test spi_nfc_test adc_test led_test OBJS += uart_test OBJS += helloADC</tt> * Compile and run: <tt>make sudo output/helloADC</tt> '''Note:''' If you have not used the latest system image for pcDuino8 Uno, you have to add <tt>sudo</tt> to access adc , the following content will tell you how to add permission for user linaro. <tt>bash sudo echo "SUBSYSTEM=="i2cdev", GROUP="i2c"" > /etc/udev/rules.d/90-i2c.rules sudo useradd linaro i2c sudo reboot</tt>
+  sudo echo "SUBSYSTEM=="i2cdev", GROUP="i2c"" > /etc/udev/rules.d/90-i2c.rules

@@ Line 2: / Line 2: @@
 == Description ==
-[[File:1-97.jpg]]
+[[File:1-97.png]]
 This ADC breakout board is specially designed for pcDuino8 Uno which has no on-board ADC module. It expands 6 ADC channels using ADI AD7997 12-bit ADC module which provides a I2C-compatible interface.
@@ Line 21: / Line 21: @@
 * Plug the ADC breakout board into J10 (as shown in the following picture).
-[[File:1-98.jpg]]
+[[File:1-98.png]]
 === Quick test ===
@@ Line 30: / Line 30: @@
 <tt>bash git clone https://github.com/pcduino/pcduino8_uno_lib</tt> * Clean and Compile the lib: <tt>cd pcduino8_uno_lib make clean make sudo ./output/adc_test</tt> * Input an analog signal on ADC0 channel
-[[File:1-99.jpg]]
+[[File:1-99.png]]
 * The adc_test program will print the value of analog signal on ADC0 channel as default.