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by bobvann
Sun Sep 20, 2015 1:17 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: MCP23017 Interrupts not Raising
Replies: 9
Views: 3370

Re: MCP23017 Interrupts not Raising

nothing....

I could not make interrupts work...

So I gave up, because I needed this thing urgently....and I decided to use a GPIO input and I will buy the RPi B+ which has 40 GPIO and remove the MCP23017
by bobvann
Sun Sep 20, 2015 9:32 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: MCP23017 Interrupts not Raising
Replies: 9
Views: 3370

Re: MCP23017 Interrupts not Raising

Thanks for the answers.

I am trying right now to connect only one interrupt (the one I need) to the GPIO as disconnect the second, which may cause the problem.

I'm going to keep you updated.
by bobvann
Sun Sep 20, 2015 7:35 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: MCP23017 Interrupts not Raising
Replies: 9
Views: 3370

Re: MCP23017 Interrupts not Raising

Hi, thanks for the reply. I am bridging them together simply by connectiong them phisically together and then to the gpio. This is called cabled or, so if any of the two ones is high, the port should get high. I am just pressing the button for something like a second. The logic of the mcp23017 (as I...
by bobvann
Sat Sep 19, 2015 7:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: MCP23017 Interrupts not Raising
Replies: 9
Views: 3370

MCP23017 Interrupts not Raising

Hi everybody, I am trying to use the interrupts of the mcp23017 with the raspberry Pi. I am writing my own python interface for the module, so I am just using the RPi.GPIO library for detecting the state of the interrupt pin and smbus python module to communicate with the mcp23017 by i2c. I easily m...

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