1. intro

./pic/high_precission_ad_da_board.png

2. prereqs

download and flash centos7 on the microSD card

wget http://mirror.nl.datapacket.com/centos-altarch/7.9.2009/isos/armhfp/CentOS-Userland-7-armv7hl-RaspberryPI-Minimal-4-2009-sda.raw.xz
zcat CentOS-Userland-7-armv7hl-RaspberryPI-Minimal-4-2009-sda.raw.xz | dd of=/dev/sdb bs="4M" status="progress" iflag="fullblock" oflag="direct"

boot the raspberry with the microSD

rootfs-expand
yum -y update
reboot
yum -y install gcc-c++ make wget
yum -y install https://armv7.dev.centos.org/repodir/epel-pass-1/p7zip/16.02-10.el7/armv7hl/p7zip-16.02-10.el7.armv7hl.rpm

3. compile bcm2835 libraries

wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.68.tar.gz
tar xzf bcm2835-1.68.tar.gz
rm -f bcm2835-1.68.tar.gz
cd bcm2835-1.68/
./configure
make
make install
cd

4. compile ads1256 sample

wget https://www.waveshare.com/w/upload/5/5e/High-Precision-AD-DA-Board-Code.7z
7za x High-Precision-AD-DA-Board-Code.7z
rm -f High-Precision-AD-DA-Board-Code.7z
cd ./RaspberryPI/ADS1256/bcm2835/
make clean
make
cd
./RaspberryPI/ADS1256/bcm2835/ads1256_test
 demo
bcm2835 init success !!!
ID Read success
0 2.103088
1 1.121597
2 1.215120
3 1.215360
4 1.215203
5 1.215342
6 1.215304
7 1.215112

5. references

https://www.waveshare.com/

https://www.waveshare.com/high-precision-ad-da-board.htm

https://www.waveshare.com/wiki/High-Precision_AD/DA_Board