Quelltext der Seite WSAL11010 – High-Precision AD – DA Board/en

__NOINDEX__
'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The board adds high-precision analog-digital and digital-analog conversion to Raspberry Pi and Jetson Nano over SPI.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL11010 WSAL11010 – Raspberry Pi High-Precision AD/DA Expansion Board]

== Technical overview ==
* Uses the 24-bit, 8-channel ADC ADS1256 with a 30 kS/s sampling rate and four differential inputs.
* Includes the 16-bit, 2-channel DAC DAC8552 for output conversion.
* The pinout follows the Waveshare sensor interface standard, allowing connection of various analog sensor modules.
* Terminal blocks consolidate input and output interfaces for analog and digital signals.
* An onboard AD/DA test circuit simplifies signal demonstration.
* For Raspberry Pi, enable the SPI interface via raspi-config under Interfacing Options.
* Ready-made demo projects are provided in C, Python 2, Python 3, and WiringPi.

'''Commands and examples – verify before use:''' 
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
ls /dev/spi
sudo wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz
sudo tar zxvf bcm2835-1.71.tar.gz
cd bcm2835-1.71/
sudo ./configure && sudo make && sudo make check && sudo make install
sudo apt-get install wiringpi
wget https://files.waveshare.com/wiki/common/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
gpio -v
sudo git clone https://github.com/WiringPi/WiringPi
cd WiringPi
sudo ./build
sudo su
wget https://github.com/joan2937/lg/archive/master.zip
unzip master.zip
cd lg-master
sudo make install
sudo apt-get update
</syntaxhighlight>

== Notes and version constraints ==
* On Bookworm only the lgpio library is available; BCM2835 and WiringPi cannot be installed or used.
* After using the BCM2835 library, the Raspberry Pi must be restarted so that other libraries run correctly.
* Unconnected channels display around 1.17 V or 5.08 V as idle signals; this is normal due to the chip's internal structure.
* The demo adds a delay during data processing, so the effective sampling rate may fall below 30 kS/s.
* STM32 compatibility is claimed in the source but lacks specific instructions; porting requires manual work.
* Loading the SPI driver on Jetson Nano uses 'sudo modprobe spidev'; the correct configuration should be verified before use.

== Source and revision record ==
* [https://www.waveshare.com/wiki/High-Precision_AD/DA_Board High-Precision AD/DA Board - Waveshare Wiki]
* Source revision: 87049
* Captured: 2026-08-30T02:42:22+00:00
* SHA-256: <code>d65b7df134197c662b66ebcb4edf35633484166b0a179396692a0d78a8388020</code>