Serial Passthrough

A great way to extend the hardware features of MetaWear is to attach additional devices via a serial bus (I2C or SPI).

Read/Write

To read or write to the registers on the device, first use the MBLSerial module to create an MBLI2CData or MBLSPIData object, then invoke its read/write methods.

let bmi160 = device.serial?.data(withSlaveSelectPin: 10,
                                 clockPin: 0,
                                 mosiPin: 11,
                                 misoPin: 7,
                                 lsbFirst: false,
                                 spiMode: 3,
                                 spiFrequency: 6,
                                 nativePinIndexing: true,
                                 length: 5)
let byte: UInt8 = 0xDA
bmi160?.read(withParamtersAsync: Data(bytes: [byte])).success { result in
    print(result)
}

let aReg = device.serial?.data(atDeviceAddress: 0x1C, registerAddress: 0x0D, length: 1)
aReg?.writeByteAsync(0x55)

Periodic Reads

Since MBLI2CData and MBLSPIData derive from MBLData they inherit its periodic read methods:

let reg = device.serial?.data(atDeviceAddress: 0x1C, registerAddress: 0x12, length: 1)
let periodicRead = reg?.periodicRead(withPeriod: 1000)
periodicRead?.startNotificationsAsync(handler: { (obj, error) in
    print("I am reading every second: " + String(describing: obj))
})