mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-08 17:03:39 +00:00
Ayke van Laethem
16d2b71820
These constants were always a bit weird:
* they use an uncommon name (TWI instead of I2C)
* they don't follow Go naming conventions (CamelCase)
* the constants don't provide much value: their name is their value
(100KHZ => 100e3).
Therefore, I propose we remove them and replace them with regular
numeric constants.
40 lines
775 B
Go
40 lines
775 B
Go
package main
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import (
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"machine"
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"tinygo.org/x/drivers/mcp23017"
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)
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func main() {
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err := machine.I2C0.Configure(machine.I2CConfig{
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Frequency: 400e3,
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})
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if err != nil {
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panic(err)
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}
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dev, err := mcp23017.NewI2C(machine.I2C0, 0x20)
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if err != nil {
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panic(err)
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}
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// Configure pin 0 for input and all the others for output.
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if err := dev.SetModes([]mcp23017.PinMode{
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mcp23017.Input | mcp23017.Pullup,
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mcp23017.Output,
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}); err != nil {
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panic(err)
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}
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input := dev.Pin(0)
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outputMask := ^mcp23017.Pins(1 << 0) // All except pin 0
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inputVal, err := input.Get()
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if err != nil {
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panic(err)
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}
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println("input value: ", inputVal)
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// Set the values of all the output pins.
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err = dev.SetPins(0b1011011_01101110, outputMask)
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if err != nil {
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panic(err)
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}
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}
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