RGB LED Reference Design

The design presents a customizable LED management answer with full RGB management, brightness, and results by way of a GUI optimised for cell machine integration.

Full management of RGB LEDs permits customers to handle the color, blink fee, brightness, and respiratory (activate/flip off pace) by means of an SPI interface and a software program GUI that operates on MAC and Home windows PCs by way of a USB cable. Moreover, the Lattice RGB reference design presents a low-cost, fast customization choice, enabling the combination of a totally managed LED into any sort of design and permitting for fast adaptation of LED operation to fulfill particular software wants.

The function set supplies full management of an RGB LED, together with color, brightness and depth, blink fee, and respiratory (activate/flip off pace), by means of a software program demonstration GUI suitable with each MAC and Home windows PCs by way of USB. Customers can management all 4 LED capabilities and consider their designs utilizing {hardware} analysis boards such because the iCE40LP1K Analysis Equipment, iCE40 Extremely Breakout Board, or iCE40 UltraLite Breakout Board. The ultra-compact design requires as few as 700 LUTs, making it extremely environment friendly and adaptable for numerous purposes.

The iCE40 Extremely Cellular Improvement Platform is designed to function multi-colour LEDs (RGB) with particular person brightness changes utilizing Pulse Width Modulation (PWM), computerized blinking management, and an non-compulsory breath on/off function. It’s geared up with an iCE40 Extremely machine programmed with a design incorporating an I2C slave interface, knowledge management, buffer, and LED management functionalities. This machine may be seamlessly interfaced with the appliance processor to drive the LED successfully.

Moreover, the module options an RGB driver geared up with a relentless present sink and incorporates a power-on system reset perform. The I2C Slave Wrapper module is an important part that instantiates the i2c Slave module, the place the I2C exhausting IP primitive is embedded. This setup implements a state machine designed to interface with the system bus. The state machine is liable for the preliminary configuration of the primitive both at power-on or following a reset occasion. It additionally handles the duties of studying and writing to the system bus, enabling the extraction of information acquired on the I2C controller and its subsequent supply to higher-level modules, signalled by a receiver-ready indicator. 

The iCE40 Extremely household from Lattice Semiconductor is a low-power chip for smartphones, tablets, and handheld devices. It helps handle sensors and different duties whereas utilizing little or no power. This chip can connect with cell sensors and processors utilizing built-in SPI and I2C blocks. It additionally has two built-in clocks, one operating at 10 kHz for low-power duties which can be at all times on and one other at 48 MHz for extra lively duties when wanted.

Lattice Semiconductor has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) format, and extra. The corporate’s web site has extra knowledge concerning the reference design. To learn extra about this reference design, click on right here.