adafruit / adafruit_tlc5947 Goto Github PK

View Code? Open in Web Editor NEW

37.0 20.0 20.0 621 KB

Adafruit's Arduino driver for the TLC5947

Home Page: http://www.adafruit.com/products/1429

License: Other

C++ 100.00%

arduino-library

adafruit_tlc5947's Introduction

Adafruit TLC5947

This is a library for our Adafruit 24-channel PWM/LED driver

Tested and works great with the Adafruit TLC5947

http://www.adafruit.com/products/1429

These drivers uses SPI to communicate, 3 pins are required to
interface: Data, Clock and Latch. The boards are chainable

Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit!

Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, check license.txt for more information All text above must be included in any redistribution

To install, use the Arduino Library Manager and search for "Adafruit TLC5947" and install the library.

adafruit_tlc5947's People

Contributors

Stargazers

Watchers

Forkers

keeft joelbschwartz nohomey 1deadpixl vrkmurthy ilium007 dailytlj hoffmannjan jhpark1013 e-bonner ramonaoptics wabbitguy kamoras agrommek positron96 jesselliang blair-johnson sixthsensevision alangitman

adafruit_tlc5947's Issues

The example doesn't work for me, please help me.

Hellow my name is Ivo Stratev/NoHomey and i have the following problem:
I couldn't find direct non technical support so i decided to create new Isssue.
The only code I' ve changed is the ports define and number of chips (i have 8 chained):

define NUM_TLC5974 8

define data 8

define clock 9

define latch 10

define oe 11 // set to -1 to not use the enable pin (its optional)

and the Adafruit_TLC5947::setLED method because of my wiring (brg) instead of (rgb).

So once i upload the code nothing happens.
Please help me i need it to work for the next week wich is the deadline for my project.
You can contact me here or on [email protected]
Thank you for your time.
Best regards, Ivo Stratev

malloc'ed memory does not get freed

The constructor mallocs memory for PWM array, but the destructor (there is none) does not free it. If the object is not global, there is a huge (~50 bytes) leak every time it is destroyed.

It would actually be better to not use dynamic RAM at all, e.g. specify output count as a template parameter and bake the array at compile-time.

calloc

Tried to use this library running on a Feather HUZZAH (ESP8266) board to control a TLC5947, both recently purchased. Using Arduino IDE v. 1.6.5, the library gets a compilation error from the use of calloc in line 27 of Adafruit_TLC5947.cpp.

Adafruit TLC5947\Adafruit_TLC5947.cpp.o:(.text+0x0): undefined reference to `calloc'

I changed the line to use malloc and it compiles fine and seems to function. But this doesn't zero the memory the way calloc does, so it's probably not exactly a fix.

pwmbuffer = (uint16_t *)calloc(2, 24*n); //original, doesn't compile
pwmbuffer = (uint16_t *)malloc(2* 24*n); //new, compiles

Non-functional with ESP8266

Arduino board: ESP8266 12-E ESP library 2.5.2
Arduino IDE version (found in Arduino -> About Arduino menu): 1.8.10
List the steps to reproduce the problem below (if possible attach a sketch or
copy the sketch code in too): LED's are erratic like a timing issue...

3 daisy chained Adafruit 5947's...

Constant NUM_TLC5974 is wrong

Picky bug, but nonetheless here we go!
In the example code the device name is wrong in the NUM_TLC5974 declaration and usages throughout.
It should of course be NUM_TLC5947

Also, I haven't been able to find any info in the code or the docs about when and for what you would use the OE input to the board - or not.