LedControl | Arduino library for MAX7219 and MAX7221 Led display drivers

by wayoda C++ Version: 1.0.6 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(6)Vulnerabilities Install Support

kandi X-RAY | LedControl Summary

LedControl is a C++ library typically used in Internet of Things (IoT), Arduino applications. LedControl has no bugs, it has no vulnerabilities and it has low support. However LedControl has a Non-SPDX License. You can download it from GitHub.

An Arduino library for MAX7219 and MAX7221 Led display drivers

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Quality

Security

License

Reuse

Support

LedControl has a low active ecosystem.

It has 436 star(s) with 233 fork(s). There are 44 watchers for this library.

It had no major release in the last 12 months.

There are 24 open issues and 9 have been closed. On average issues are closed in 19 days. There are 14 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of LedControl is 1.0.6

Quality

LedControl has no bugs reported.

Security

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

License

LedControl has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

LedControl releases are available to install and integrate.

Installation instructions are available. Examples and code snippets are not available.

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LedControl Key Features

No Key Features are available at this moment for LedControl.

LedControl Examples and Code Snippets

No Code Snippets are available at this moment for LedControl.

Community Discussions

Trending Discussions on LedControl

Wrong assignment to struct

Understanding the logic behind the code for controlling an 8x8 dot matrix with a joystick

Using SEGGER SystemView with STM32

set delay between send and receive data from bluetooth

Arduino reading from serial gives unwanted input

WPF Custom LED Checkbox

QUESTION

Wrong assignment to struct

Asked 2020-Dec-07 at 14:52

I have structs like this:

...

ANSWER

Answered 2020-Dec-07 at 14:49

In your second example, try ws2811_channel_t channel{}; and ws2811_t test{}; - e.g. add the {}.

If you do this, then you'll zero initialise all the members. The key difference between your first (working) version, and the second (broken) version is that first version will zero things like gamma whilst the second version won't. Adding {} will zero everything before you overwrite the items you want.

If you do type a = {...}, then whatever is in the ... and not mentioned or indexed will be zeroed. If you do type b; b.field=value; there is nothing here that will zero any specifically not initialised fields.

Source https://stackoverflow.com/questions/65183266

QUESTION

Understanding the logic behind the code for controlling an 8x8 dot matrix with a joystick

Asked 2020-May-13 at 07:04

I found this code online for controlling a max7219 8x8 matrix with an Arduino, and I am struggling to understand a few things about the code. Here is the whole code:

...

ANSWER

Answered 2020-May-13 at 07:04

From the Arduino manual:

Serial.begin(baud)

Sets the data rate in bits per second (baud) for serial data transmission.

So in your case its 9600 baud.

Serial.print()

Prints data to the serial port as human-readable ASCII text. An optional second parameter specifies the base (format) to use; permitted values are BIN(binary, or base 2), OCT(octal, or base 8), DEC(decimal, or base 10), HEX(hexadecimal, or base 16). For floating point numbers, this parameter specifies the number of decimal places to use. For example-

Serial.print(78, BIN) gives "1001110"

Serial.print(78, OCT) gives "116"

Serial.print(78, DEC) gives "78"

Serial.print(78, HEX) gives "4E"

Serial.print(1.23456, 0) gives "1"

Serial.print(1.23456, 2) gives "1.23"

Serial.print(1.23456, 4) gives "1.2345"

map(value, fromLow, fromHigh, toLow, toHigh)

Re-maps a number from one range to another. That is, a value of fromLow would get mapped to toLow, a value of fromHigh to toHigh, values in-between to values in-between, etc.

value: the number to map. fromLow: the lower bound of the value’s current range.

fromHigh: the upper bound of the value’s current range.

toLow: the lower bound of the value’s target range.

toHigh: the upper bound of the value’s target range.

The value 1021 was picked by whoever wrote that code because he wanted to map the range [1021-0] to [7-0], most likely because the maximum joystick elongation yielded the analog value 1021.

Source https://stackoverflow.com/questions/61767010

QUESTION

Using SEGGER SystemView with STM32

Asked 2020-Mar-14 at 08:08

Currently I'm developing a project with FreeRTOS on a STM32L476VGT. Until now I've been debugging with Ozone(SEGGER) and J-Link (Edu and Ultra+)

Now I would like to "debug" or record system event using SystemView (SEGGER), but it's not working.

first of all some of the configurations I think there are important: 16Mhz HSE --> internal 80Mhz SysClk FreeRTOS V8.2.3

J-link (SCLK,SDIO & SWO connected)

Project created with cubeMx so ST HAl libraries are in use(I know that for many people is bloatware but is what it was when I get the project).

main.c

...

ANSWER

Answered 2018-Jan-28 at 09:37

Solved, RFM(UM08027_SystemView.pdf)!! I forgot to apply the freeRTOS patch file. There are some mismatches between the line in the patch and the line in the file.

Now works perfect.

Source https://stackoverflow.com/questions/48263579

QUESTION

set delay between send and receive data from bluetooth

Asked 2020-Jan-08 at 15:48

I set a program to send data from the android app to a microcontroller through bluetooth using SPP. mentioned microcontroller device sends a response back after 150 milisec as processing time. My app receives an appropriate response by bluetooth response handler as RecieveBuffer.And application must send data again for the case when the microcontroller doesn't send an appropriate. I used a while conditional statement like below to send data alternatively until getting a response (send flag is true after app gets an appropriate response by bluetooth response handler class).

...

ANSWER

Answered 2020-Jan-08 at 15:48

I found a way to solve the mentioned problem so that I applied a CountDownTimer which sends data every 1 sec through 3 sec and the timer will be canceled due to avoid wasting time if sent data and response are ok both. in regular conditions, this timer sends data once since the application receives an appropriate response.

Source https://stackoverflow.com/questions/59647672

QUESTION

Arduino reading from serial gives unwanted input

Asked 2019-Jul-05 at 23:18

I am trying to build a small program to control 3 led's. The led's are connected on pins 11 (red), 12 (yellow) and 13 (green).

For some to me unknow reason the following code does not seem to work. If I enter 1 in the serial input, the yellow led will light up. But after about 1 second it's turned off again and the red led is turned on. It looks to me like there is alway's a 0 on the serial input, but that can't be right is it?

...

ANSWER

Answered 2019-Jul-05 at 23:18

I believe your Serial Monitor's line ending setting is set to Both NL & CR. One triggers Serial.parseInt() and the other triggers another Serial.parseInt(). So, each serial input, you are calling the function twice. And the second one always returns 0 as newline only (or carriage return only) is not valid digits. That is why your red LED gets turned on. Try other line ending settings.

Source https://stackoverflow.com/questions/56909865

QUESTION

WPF Custom LED Checkbox

Asked 2018-Dec-07 at 15:32

I currently trying to "port" some control from WindowsForms to WPF. I Have this stylish led checkbox and try to achieve the same visual appearance in wpf. but I'm unable to get it done.

I've searched a lot butt cannot find a solution to my questions/problems.

This is how the winforms Control looks like

The colored Circle size depends on the size of the control. The color is user definable. The color is used for the circle and the Text. It's bright if it ich checked and dimmed / gray when it's unchecked. The diark and highlight colors are calculated from the control color (lighter/darker).

All my tries to do the same in wpf pretty much failed up to now. :-( I fist tried to do it with an usercontrol, but decided it would be easier to have it derived from checkbox with just an extra option to set the color.

...

ANSWER

Answered 2017-Mar-17 at 11:47

You can use PathGradientBrush to draw a radial gradient. Here is the result of the code which I wrote. You can use any color as CheckedColor and UnCheckedColor, I used Red and Green to get this result:

Code

Source https://stackoverflow.com/questions/42855236

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

Vulnerabilities

No vulnerabilities reported

Install LedControl

The lastest binary version of the Library is always available from the [LedControl Release Page](https://github.com/wayoda/LedControl/releases).
The library can be installed using the [standard Arduino library install procedure](http://arduino.cc/en/Guide/Libraries).