12c examples about ofxgpio HOT 9 OPEN

an anomaly has been reported to me with i2c on debian stretch.

what operating system are you working on?
you can pass me a: uname -a ?

now i'm traveling, in a few days i go back to the laboratory and try to understand the problem!

thanks!

from ofxgpio.

Hey, I get this:
Linux raspberrypi 4.14.30-v7+ #1102 SMP Mon Mar 26 16:45:49 BST 2018 armv7l GNU/Linux
I am also trying to get SPI for an MCP3008, I don't manage to get any input (I have used the chip before). In the meantime can you recommend a version of OF and the stretch/or previous OS for linux that will function?

from ofxgpio.

Hi @fred-dev ,

I just fixed the examples for the i2c bus scanner, now you should see the addresses on the bus!

the example for the openframeworks scanner wired the path to the device: /dev/i2c-1 in the code
you can modify it as you wish.

regarding SPI there should not be any problem, both the example i2c and SPI must be executed with a user who can access you device, you can check if your user belongs to the i2c group and spi with command: id or run the example with sudo.

you can also refer to this issues:
#18

for some additions made to the SPI class.
make sure the MCP example points to the right path for the SPI device you are using.

try to look at this example that takes the path of the spi device as a parameter in the setup method
https://github.com/kashimAstro/ofxGPIO/blob/master/example-mcp-simple-syntax/src/main.cpp

please let me know
Greetings

from ofxgpio.

from ofxgpio.

Hi, thanks for feedback!

unfortunately, I can only reach a remote raspberry that is in my office in Italy, while I am now in switzerland. I'd like to solve this, can you help me debug?

if you can! add a: cout << result << endl; to the scanner example, immediately after this line:
https://github.com/kashimAstro/ofxGPIO/blob/master/example-i2c-scanner/src/main.cpp#L28
and pass me the output.

Grazie!

from ofxgpio.

from ofxgpio.

the whole list contains only the value: 65415?
this is strange smbus should return 0 or 255 if it finds an address..
Is the chip connected when you run example?

from ofxgpio.

from ofxgpio.

Hi @fred-dev thanks for this,
in the next few days I solve this problem!

from ofxgpio.