MCP23S17 | Arduino library for MCP23S17 IO Expanders

by MajenkoLibraries HTML Version: Current License: BSD-3-Clause

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | MCP23S17 Summary

MCP23S17 is a HTML library typically used in Internet of Things (IoT), Arduino applications. MCP23S17 has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Arduino library for MCP23S17 IO Expanders.

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Quality

Security

License

Reuse

Support

MCP23S17 has a low active ecosystem.

It has 28 star(s) with 11 fork(s). There are 8 watchers for this library.

It had no major release in the last 6 months.

There are 4 open issues and 3 have been closed. On average issues are closed in 0 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of MCP23S17 is current.

Quality

MCP23S17 has no bugs reported.

Security

MCP23S17 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

MCP23S17 is licensed under the BSD-3-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

MCP23S17 releases are not available. You will need to build from source code and install.

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MCP23S17 Key Features

No Key Features are available at this moment for MCP23S17.

MCP23S17 Examples and Code Snippets

No Code Snippets are available at this moment for MCP23S17.

Community Discussions

Trending Discussions on MCP23S17

Why don't I get HIGH on output pins of MCP23S17?

Calling a method I get AttributeError: 'int' object has no attribute

Initializing and using struct members inside another struct

QUESTION

Why don't I get HIGH on output pins of MCP23S17?

Asked 2021-Jan-26 at 06:54

I use a STM32 connected with SPI to a MCP23S17 16 bit I/O port expander.

I want to make all 16 I/0 pins as output and just making them all LOW or HIGH.

I used an oscilloscope to check is SPI transmit the signals right, and it does. The only thing is that on the I/O pins I get around 0.4V. Not 5V.

Sometimes I get a value of 1.4V but it goes away, weird thing...

Can somebody check my code and tell me where is my mistake? I am pretty sure I did the code wrong somewhere.

MCP23S17.h:

...

ANSWER

Answered 2021-Jan-08 at 10:34

The only thing is that on the I/O pins I get around 0.4V

This is likely because GPIOs are not initialized.

You also have a different problem to deal with.

Source https://stackoverflow.com/questions/65626315

QUESTION

Calling a method I get AttributeError: 'int' object has no attribute

Asked 2019-Jul-21 at 12:21

I have a callback method being triggered on a GPIO pin that when fired calls for a read of a input devices register, however when called I get -

Traceback (most recent call last): File "/home/coder/Try2.py", line 35, in NewPins x = self.mcp.readGPIO() AttributeError: 'int' object has no attribute 'mcp'

If I enter- a.mcp.readGPIO() <- from python shell I get

...

ANSWER

Answered 2019-Jul-21 at 12:21

Ok my dumb.... - the RPiGPIO library I'm using returns the GPIO channel number in the callback, hence the callback function requires two arguments and not one. I had thought I'd messed up my namespaces and so was trying to code around this when I encountered the error above - I'm a novice python programmer and didn't know where to look! That'll teach me to not to read the documentation thoroughly...

Source https://stackoverflow.com/questions/56881513

QUESTION

Initializing and using struct members inside another struct

Asked 2019-Jun-28 at 21:37

I need to use a struct (struct1), that was previously declared, inside a new struct (struct2). Also I want to initialize it, and use some of the members of struct1 to initialize other members of struct2.

Specifically, I want to set values for struct1 and use some of those values to define the sizes of other members of struct2

I tried what is shown in the code, but I don't get why it isn't working.

...

ANSWER

Answered 2019-Jun-19 at 23:08

Minimum necessary changes

You can't mix a typedef with initializers — at least, not in C. You also can't have structure types where the size varies depending on the data in the structure — at least, not without using one (and only one) flexible array member (FAM), but your code attempts to use two variable arrays (so they can't be FAMs).

You need something more like:

Source https://stackoverflow.com/questions/56675755

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install MCP23S17

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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