mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-08 00:43:39 +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.
61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package main
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import (
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"machine"
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"strconv"
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"time"
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"tinygo.org/x/drivers/hd44780i2c"
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)
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func main() {
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// Note: most HD44780 LCD modules requires 5V power, however some variations
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// use 3.3V (and may be damaged by 5V).
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machine.I2C0.Configure(machine.I2CConfig{
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Frequency: 400e3,
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})
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lcd := hd44780i2c.New(machine.I2C0, 0x27) // some modules have address 0x3F
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lcd.Configure(hd44780i2c.Config{
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Width: 16, // required
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Height: 2, // required
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CursorOn: true,
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CursorBlink: true,
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})
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lcd.Print([]byte(" TinyGo\n LCD Test "))
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// CGRAM address 0x0-0x7 can be used to store 8 custom characters
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lcd.CreateCharacter(0x0, []byte{0x00, 0x11, 0x0E, 0x1F, 0x15, 0x1F, 0x1F, 0x1F})
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lcd.Print([]byte{0x0})
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// You can use https://maxpromer.github.io/LCD-Character-Creator/
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// to crete your own characters.
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time.Sleep(time.Millisecond * 7000)
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for i := 0; i < 5; i++ {
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lcd.BacklightOn(false)
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time.Sleep(time.Millisecond * 250)
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lcd.BacklightOn(true)
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time.Sleep(time.Millisecond * 250)
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}
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lcd.CursorOn(false)
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lcd.CursorBlink(false)
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i := 0
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for {
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lcd.ClearDisplay()
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lcd.SetCursor(2, 1)
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lcd.Print([]byte(strconv.FormatInt(int64(i), 10)))
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i++
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time.Sleep(time.Millisecond * 100)
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}
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}
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