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Pat Whittingslow
50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package main
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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/honeyhsc"
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)
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// Data taken from https://github.com/rodan/honeywell_hsc_ssc_i2c/blob/master/hsc_ssc_i2c.cpp
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// these defaults are valid for the HSCMRNN030PA2A3 chip
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const (
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i2cAddress = 0x28
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// 10%
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outputMinimum = 0x666
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// 90% of 2^14 - 1
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outputMax = 0x399A
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// min is 0 for sensors that give absolute values
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pressureMin = 0
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// 30psi (and we want results in millipascals)
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// pressureMax = 206842.7
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pressureMax = 206843 * 1000
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)
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func main() {
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bus := machine.I2C0
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err := bus.Configure(machine.I2CConfig{
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Frequency: 400_000, // 100kHz minimum and 400kHz I2C maximum clock. 50 to 800 for SPI.
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SDA: machine.I2C0_SDA_PIN,
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SCL: machine.I2C0_SCL_PIN,
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})
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if err != nil {
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panic(err.Error())
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}
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sensor := honeyhsc.NewDevI2C(bus, i2cAddress, outputMinimum, outputMax, pressureMin, pressureMax)
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for {
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time.Sleep(time.Second)
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const measuremask = drivers.Pressure | drivers.Temperature
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err := sensor.Update(measuremask)
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if err != nil {
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println("error updating measurements:", err.Error())
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continue
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}
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P := sensor.Pressure()
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T := sensor.Temperature()
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println("pressure:", P, "temperature:", T)
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}
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}
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