A command line program for reading mcp3008 ADCs.
Developed for testing MCP3008 ADCs connected to an RPi3, but should work with other ADC devices showing up under sysfs.
Fetch with git, build with make.
root@rpi3:~# git clone https://github.com/scottellis/mcp3008-poll
Cloning into 'mcp3008-poll'...
remote: Counting objects: 6, done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 6 (delta 1), reused 6 (delta 1), pack-reused 0
Unpacking objects: 100% (6/6), done.
Checking connectivity... done.
root@rpi3:~# cd mcp3008-poll
root@rpi3:~/mcp3008-poll# make
cc mcp3008-poll.c -o mcp3008-poll
Run
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -h
Usage: ./mcp3008-poll <options> [adc-list]
-d<delay-us> Microsecond delay between reads, default 10000, min 0
adc-list Space separated list of ADCs to monitor, 0-7
Example:
./mcp3008-poll -d100 0 1
Here are some sample runs with the ADC powered by 3.3v off the RPi3 header connected to SPI0.0
This is appended to config.txt to setup the mcp320x device driver
dtparam=spi=on
dtoverlay=mcp3008:spi0-0-present
The SPI clock is running at 1MHz, the default specified in the mcp3008 overlay.
One channel
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -d0 0
(use ctrl-c to stop)
ADC 0
Read 1036000: 621 ^C
Summary
Elapsed: 56.93 seconds
Reads: 1037028
Rate: 18215.51 Hz
Two channels
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -d0 0 1
(use ctrl-c to stop)
ADC 0 1
Read 626000: 620 621 ^C
Summary
Elapsed: 69.15 seconds
Reads: 627694
Rate: 9077.10 Hz
Three channels
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -d0 0 1 2
(use ctrl-c to stop)
ADC 0 1 2
Read 540000: 621 621 0 ^C
Summary
Elapsed: 89.53 seconds
Reads: 541640
Rate: 6049.50 Hz
Four channels
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -d0 0 1 2 3
(use ctrl-c to stop)
ADC 0 1 2 3
Read 446000: 620 621 0 0 ^C
Summary
Elapsed: 97.90 seconds
Reads: 446401
Rate: 4559.73 Hz
Eight channels
root@rpi3:~/mcp3008-poll# ./mcp3008-poll -d0 0 1 2 3 4 5 6 7
(use ctrl-c to stop)
ADC 0 1 2 3 4 5 6 7
Read 202000: 621 621 0 0 0 0 0 0 ^C
Summary
Elapsed: 88.20 seconds
Reads: 202710
Rate: 2298.37 Hz