Common automotive lights include headlights, rear combination lights, fog lights, door lights, reading lights, daytime running lights, turn signals, brake lights, ambient lights and so on. As a solid-state semiconductor device that converts electrical energy into visible light, LED can play the role of intelligent lighting to the greatest extent and meet the market demand for automotive lighting in all aspects, such as dimming, color mixing, scalability and other functions.
The application of automotive intelligent control system gives the momentum of continuous upgrading of automotive lights. As a subdivision of automotive components, the growth rate of automotive lights is faster than the overall automotive industry, the fundamental reason is that consumers are willing to pay for more beautiful, smarter, more energy-efficient automotive lights. Intelligent headlights require MCU to control multiple lighting zones and achieve precise control.
The APM32F103RCT7 automotive headlight solution is based on the APM32F103RCT7 automotive-grade MCU, which is designed to improve conversion efficiency and reduce system cost.
APM32F103RCT7 headlight solution overview.
1.MCU communicate with LED driver chip through GPIO/SPI interface, and can control interior ambient light partition, group switch, and constant current dimming output.
- detect the sunroof switch command input and control the operation of sunroof motor through GPIO.
- After detecting the sunshade switch command input, the ADC collects the data from the motor position sensor and outputs to control the forward and reverse operation of the sunshade and the operation position adjustment.
- MCU realizes data interaction with BCM body control unit through CAN BUS to realize closed-loop control.
APM32F103RCT7 headlamp solution core advantages.
- Based on Arm Cortex-M3 core, working main frequency 96MHz; – Enhanced storage space 256KB Flash, 64KB SRAM, supporting the development of more functional applications; – Operating temperature 40℃~105℃, meeting the requirements of the working environment temperature of the headlights, ensuring the stable operation of the system; – 12-bit high-precision ADC, which can accurately collect voltage, current, 12-bit high-precision ADC, can accurately collect voltage, current, temperature and other analog signals, in the closed-loop control, intelligent feedback output; – integrated rich peripheral interfaces, U (S) ART * 5, I2C * 2, I2S * 2, SPI * 3, SDIO * 1, to meet the MCU and LED driver, motor driver communication and control application functions; – support dual CAN interface, in line with the 2.0A/2.0B (active) specifications, communication The communication rate is up to 1Mbit/s, which can meet the interactive communication with automotive CAN bus system and realize the operation requirements of light control, body control, instrument communication, monitoring and calibration; – It has passed the AEC-Q100 automotive specification certification, which meets the requirements of automotive electronic high performance standards.
