mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-07-26 10:38:41 +00:00
Ayke van Laethem
eef03917ab
I wrote this for the PineTime, and all available sensors (accelerometer, step counter, temperature sensor) do work. This commit also includes two "configuration files", that actually appear to be firmware files to run on the accelerometer for special features like step counting. I'm not sure where they originally came for, and I don't know the copyright status of them. However, Bosch has open-sourced the BMA423 driver which includes a similar binary blob and the InfiniTime and Wasp-OS projects have been shipping these blobs without issues, so I think it's reasonably safe to include these binary blobs directly in the source.
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package main
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// Smoke test for the BMA421/BMA425 sensors.
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// Warning: this code has _not been tested_. It's only here as a smoke test.
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import (
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"fmt"
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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/bma42x"
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)
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func main() {
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time.Sleep(5 * time.Second)
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i2cBus := machine.I2C1
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i2cBus.Configure(machine.I2CConfig{
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Frequency: 400 * machine.KHz,
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SDA: machine.SDA_PIN,
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SCL: machine.SCL_PIN,
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})
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sensor := bma42x.NewI2C(i2cBus, bma42x.Address)
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err := sensor.Configure(bma42x.Config{
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Device: bma42x.DeviceBMA421 | bma42x.DeviceBMA425,
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Features: bma42x.FeatureStepCounting,
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})
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if err != nil {
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println("could not configure BMA421/BMA425:", err)
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return
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}
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if !sensor.Connected() {
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println("BMA42x not connected")
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return
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}
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for {
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time.Sleep(time.Second)
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err := sensor.Update(drivers.Acceleration | drivers.Temperature)
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if err != nil {
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println("Error reading sensor", err)
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continue
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}
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fmt.Printf("Temperature: %.2f °C\n", float32(sensor.Temperature())/1000)
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accelX, accelY, accelZ := sensor.Acceleration()
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fmt.Printf("Acceleration: %.2fg %.2fg %.2fg\n", float32(accelX)/1e6, float32(accelY)/1e6, float32(accelZ)/1e6)
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}
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}
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