透析SPI底层原理

Commands and data are sent to the device via the SI pin, with data being clocked in on the rising edge of SCK. Data is driven out by the MCP2515 (on the SO line) on the falling edge of SCK.

命令和数据通过SI脚发到设备上，数据在SCK的上升沿写入。数据在SCK的下降沿从SO脚输出。