One-line multi-lamp control method and device based on DMA and PWM

The invention discloses a one-line multi-lamp control method and device based on DMA/PWM. The method comprises the following steps: designing a data transmission line based on DMA/PWM; configuring a DMA channel and a PWM channel based on a DMA/PWM data transmission line; realizing data transmission by adopting a DMA technology on the basis of configuration of a DMA channel, and acquiring control data of each LED lamp; caching the control data of each LED lamp in a memory of a specified address; setting a PWM period and a duty ratio based on the control data of each LED lamp and a light brightness control requirement; and controlling the brightness of each LED lamp based on the period and the duty ratio of the set PWM. According to the embodiment of the invention, the method can achieve the simultaneous control of the brightness, color and other parameters of a plurality of LED lamps, improves the efficiency and precision of light control, and achieves the centralized control of a plurality ...