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https://github.com/tinygo-org/drivers.git
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+20
-17
@@ -1,31 +1,35 @@
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package bmi160
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import (
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"machine"
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"time"
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"tinygo.org/x/drivers"
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"tinygo.org/x/drivers/internal/legacy"
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)
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// DeviceSPI is the SPI interface to a BMI160 accelerometer/gyroscope. There is
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// also an I2C interface, but it is not yet supported.
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type DeviceSPI struct {
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// Chip select pin
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CSB machine.Pin
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CSB drivers.PinOutput
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buf [7]byte
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// SPI bus (requires chip select to be usable).
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Bus drivers.SPI
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Bus drivers.SPI
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config func()
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}
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// NewSPI returns a new device driver. The pin and SPI interface are not
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// touched, provide a fully configured SPI object and call Configure to start
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// using this device.
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func NewSPI(csb machine.Pin, spi drivers.SPI) *DeviceSPI {
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func NewSPI(csb legacy.PinOutput, spi drivers.SPI) *DeviceSPI {
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return &DeviceSPI{
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CSB: csb, // chip select
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CSB: csb.Set, // chip select
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Bus: spi,
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config: func() {
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legacy.ConfigurePinOut(csb)
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},
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}
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}
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@@ -33,8 +37,7 @@ func NewSPI(csb machine.Pin, spi drivers.SPI) *DeviceSPI {
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// configures the BMI160, but it does not configure the SPI interface (it is
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// assumed to be up and running).
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func (d *DeviceSPI) Configure() error {
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d.CSB.Configure(machine.PinConfig{Mode: machine.PinOutput})
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d.CSB.High()
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d.CSB(true)
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// The datasheet recommends doing a register read from address 0x7F to get
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// SPI communication going:
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@@ -86,9 +89,9 @@ func (d *DeviceSPI) ReadTemperature() (temperature int32, err error) {
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data[0] = 0x80 | reg_TEMPERATURE_0
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data[1] = 0
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data[2] = 0
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d.CSB.Low()
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d.CSB(false)
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err = d.Bus.Tx(data, data)
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d.CSB.High()
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d.CSB(true)
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if err != nil {
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return
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}
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@@ -123,9 +126,9 @@ func (d *DeviceSPI) ReadAcceleration() (x int32, y int32, z int32, err error) {
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for i := 1; i < len(data); i++ {
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data[i] = 0
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}
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d.CSB.Low()
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d.CSB(false)
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err = d.Bus.Tx(data, data)
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d.CSB.High()
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d.CSB(true)
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if err != nil {
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return
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}
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@@ -153,9 +156,9 @@ func (d *DeviceSPI) ReadRotation() (x int32, y int32, z int32, err error) {
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for i := 1; i < len(data); i++ {
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data[i] = 0
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}
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d.CSB.Low()
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d.CSB(false)
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err = d.Bus.Tx(data, data)
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d.CSB.High()
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d.CSB(true)
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if err != nil {
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return
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}
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@@ -201,9 +204,9 @@ func (d *DeviceSPI) readRegister(address uint8) uint8 {
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data := d.buf[:2]
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data[0] = 0x80 | address
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data[1] = 0
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d.CSB.Low()
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d.CSB(false)
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d.Bus.Tx(data, data)
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d.CSB.High()
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d.CSB(true)
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return data[1]
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}
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@@ -217,7 +220,7 @@ func (d *DeviceSPI) writeRegister(address, data uint8) {
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buf[0] = address
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buf[1] = data
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d.CSB.Low()
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d.CSB(false)
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d.Bus.Tx(buf, buf)
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d.CSB.High()
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d.CSB(true)
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}
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