| 摘要 |
<p>Provided are a concurrent access method and system, and an interface device. The concurrent access system comprises: a master apparatus (1), an interface device (3) and a plurality of slave apparatuses (5). The master apparatus (1) is connected to the interface device (3) through a data bus (2). The interface device (3) is connected to the respective slave apparatuses (5) through a plurality of series peripheral interface (SPI) buses (4). The master apparatus (1) is configured to: convert serial data of the plurality of slave apparatuses (5) into parallel data according to the clock cycle, and then output the parallel data to the interface device (3) through the data bus (2); and output chip select data for selecting the plurality of slave apparatuses (5) to the interface device (3) through the data bus (2). The interface device (3) is configured to convert the parallel data and the chip select data into level signals, and then output the level signals to a corresponding slave apparatus (5) through a corresponding SPI bus (4). The provided concurrent access method and system and interface device can improve the access efficiency when a plurality of apparatuses is connected to the SPI interface.</p> |
