Interface SpiBus

SPI总线

Remarks

通过SPI控制器 open() 方法打开并建立，返回SPI总线对象。也可通过SPI控制器的 handle() 方法获取指定控制器上已打开的总线。

Hierarchy

SpiBus

Index

Properties

dmaMaxTransSize id

Methods

Properties

`Readonly` dmaMaxTransSize

dmaMaxTransSize: number

DMA最大传输字节. 0表示未启用DMA

`Readonly` id

SPI控制器ID

Methods

addDevice

addDevice(options: {
    baudrate?: number;
    cs?: null | Byte;
    csKeepActive?: boolean;
    mode?: 0 | 2 | 1 | 3;
    writeOnly?: boolean;
}): SpiDevice
在SPI总线上添加一个设备
Parameters
- options: {
      baudrate?: number;
      cs?: null | Byte;
      csKeepActive?: boolean;
      mode?: 0 | 2 | 1 | 3;
      writeOnly?: boolean;
  }
  - Optional baudrate?: number
  - Optional cs?: null | Byte
    
    设备CS引脚
  - Optional csKeepActive?: boolean
    
    设备CS引脚是否保持一直有效，默认false
  - Optional mode?: 0 | 2 | 1 | 3
    
    模式 0: CPOL = 0, CPHA = 0 (default); 1: CPOL = 0, CPHA = 1; 2: CPOL = 1, CPHA = 0; 3: CPOL = 1, CPHA = 1
  - Optional writeOnly?: boolean
Returns SpiDevice