Open System Protocol (OSP) Überblick

This device is especially designed for automotive interior applications requesting high dynamic RGB lighting scenarios. This device is an intelligent RGB device, incorporating besides R/G/B LEDs an IC from ams OSRAM. This embedded IC integrates the drivers for the three R/G/B LEDs. The embedded IC includes the optical measurement data of the three R/G/B LEDs as well. An external micro controller can address and control each device in a daisy chain architecture via the Open System Protocol (OSP). OSP allows the micro controller to read back these data and to run any color algorithm. It also allows to read back a temperature value to optimize this color algorithm. OSIRE™ E3731i is compliant with all known patents and rights in countries with an automotive production footprint. In particular, neither rights in terms of temperature compensation within the LED nor SPI communication with controllers inside an LED are affected.

AS1163 is a mixed signal silicon device optimized for automotive dynamic lighting applications (interior, exterior, smart surface etc.). The basic purpose of AS1163 is to drive 9 LEDs organized in 3 channel triplets (RGB) or simply 9 single-color LEDs with an independent PWM dimming dynamic range up to 16 bits. AS1163 is often addressed with a different name: “SAID”, an acronym which stands for Stand-Alone Intelligent Driver. A daisy chain configuration of multiple AS1163 devices will enable cost effective implementation of complex dynamic lighting effects. AS1163 supports single layer slim PCB designs.The communication protocol supported by AS1163 (OSP: Open System Protocol) is fully compatible with the ams OSRAM OSIRE E3731i. AS1163 will support additional features such as I²C gateway, parallel connection, power-rail feedback, analog readout. Each AS1163 device in the chain will be usable by the MCU to read and write an external I²C device, e.g. EEPROM, temperature sensor, Ambient Light Sensor.

AS1163B is a mixed signal silicon device optimized for automotive dynamic lighting applications (interior, exterior, smart surface etc.). The basic purpose of AS1163B is to drive 6 LEDs organized in 2 channel triplets (RGB) or simply 6 single-color LEDs with an independent PWM dimming dynamic range up to 16 bits. AS1163B is often addressed with a different name: “SAID2”, an acronym which stands for Stand-Alone Intelligent Driver with 2 RGB triplets. A daisy chain configuration of multiple AS1163B devices will enable cost effective implementation of complex dynamic lighting effects. AS1163B supports single layer slim PCB designs.The communication protocol supported by AS1163B (OSP: Open System Protocol) is fully compatible with the ams OSRAM OSIRE E3731i. AS1163B will support additional features such as I²C gateway, parallel connection, power-rail feedback, analog readout. Each AS1163B device in the chain will be usable by the MCU to read and write an external I²C device, e.g. EEPROM, temperature sensor, Ambient Light Sensor.

Open System Protocol (OSP) was developed by ams OSRAM to enable dynamic lighting applications and more. OSP is open for everybody and free of license. It is based on a master-slave architecture, allowing to control more than 1000 devices individually in a chain. OSP is split into a base protocol, covering the lower 3 layers of ISO/OSI, and a device specific application layer. SAID (Stand-Alone Intelligent Driver) AS1163 fulfilling automotive quality is a best fit for the dynamic lighting applications. This ams OSRAM Arduino OSP ecosystem evaluation kit supports users to understand and apply the following features of SAID AS1163 and RGBi (OSIRE E37371i): - I2C interface (e.g. EEPROM included) - OSP telegram round trip time (measurement) - Compatability of OSP devices in one application - 2-wire SPI - Sync feature of LEDs - LED Flickering reduction - Multicasting of LEDs (group control) - LED brightness adjustment (16bit PWM resolution) - Direct control of OSP system via PC This evaluation kit consists of the following parts: - 1 × OSP32 (motherboard with ESP32 MCU) - 1 × SAID basic board (RGBi+SAID+I2C daughterboard) - 1 × SAID sidelooker board (sidelooker LEDs + SAID) - 1 × RGBi Strip - Several auxiliaries