原标题：汽车自适应前大灯系统

　　自适应转向大灯的演示。

　　工作原理：单片机STM8AF52AA，通过SPI总线控制两个L9942步进电机驱动芯片，控制大灯完成水平和垂直方向调节。

　　操作：板子上的4个按键，控制大灯完成4个方向的运动。

　　PC实时监测：L9942寄存器的数据可以通过URAT送到电脑上，实时监测。

　　堵转指示：板子上的LED可以指示步进电机的堵转状态

　　特点及应用

　　L9942带细分功能步进电机驱动器(整步，半步，1/4步，1/8步)

　　完善的短路保护，开路保护，过载保护，温度保护功能。

　　电流可编程与完善的诊断功能

　　应用于：

　　步进电机控制

　　自适应转向大灯控制AFS

　　系统框图

　　ST’s STM8AF series is intended for automotive applications where no compromise on parameters is possible, from reliability to system cost effectiveness. The STM8AF series is modular, provides high performance and offers the flexibility required for short development cycles. Its true data EEPROM, combined with the capability to withstand up to 150 °C ambient temperature, make the series a sustainable choice for automotive applications.

　　Now available in 32-pin QFN package.

　　STM8AF automotive MCUs with CAN

　　STM8AF5286 and STM8AF52A6 automotive CAN and LIN line 8-bit MCUs are new members of ST's automotive MCU portfolio to serve space-constrained modules connected to a CAN bus. Up to 2 Kbytes of on-board true data EEPROM with an endurance of 300k cycles, removing overhead for EEPROM emulation.

　　You can start evaluating these new devices now with the STM8A-DISCOVERY kit.