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Update hd44780i2c.go

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This commit is contained in:
Alan Wang
2021-12-24 17:19:29 +08:00
committed by Ron Evans
parent 0d40c99d1f
commit b48bc5ac5d
1 changed files with 5 additions and 4 deletions
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hd44780i2c/hd44780i2c.go
+4 -3
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@@ -101,7 +101,7 @@ func (d *Device) Configure(cfg Config) error {
return nil return nil
} }
// ClearDisplay clears all texts on the display. // ClearDisplay clears all texts on the display and sets the cursor back to position (0, 0).
func (d *Device) ClearDisplay() { func (d *Device) ClearDisplay() {
d.sendCommand(DISPLAY_CLEAR) d.sendCommand(DISPLAY_CLEAR)
d.cursor.x = 0 d.cursor.x = 0
@@ -119,7 +119,8 @@ func (d *Device) Home() {
// SetCursor sets the cursor to a specific position (x, y). // SetCursor sets the cursor to a specific position (x, y).
// //
// if y (row) is set larger than actual rows, it would be set to 0. // For example, on 16x2 LCDs the range of x (column) is 0~15 and y (row) is 0~1.
// if y is larger than actual rows, it would be set to 0 (restart from first row).
func (d *Device) SetCursor(x, y uint8) { func (d *Device) SetCursor(x, y uint8) {
rowOffset := []uint8{0x0, 0x40, 0x14, 0x54} rowOffset := []uint8{0x0, 0x40, 0x14, 0x54}
if y > (d.height - 1) { if y > (d.height - 1) {
@@ -139,11 +140,11 @@ func (d *Device) Print(data []byte) {
if chr == '\n' { if chr == '\n' {
d.newLine() d.newLine()
} else { } else {
d.cursor.x++
if d.cursor.x >= d.width { if d.cursor.x >= d.width {
d.newLine() d.newLine()
} }
d.sendData(uint8(rune(chr))) d.sendData(uint8(rune(chr)))
d.cursor.x++
} }
} }
} }