Driver for SSD1289 LCD

ssd1289/rp2040bus.go

@@ -0,0 +1,32 @@
+//go:build rp2040
+// +build rp2040
+
+package ssd1289
+
+import (
+	"device/rp"
+	"machine"
+)
+
+type rp2040Bus struct {
+	firstPin machine.Pin
+}
+
+func NewRP2040Bus(firstPin machine.Pin) rp2040Bus {
+
+	for i := uint8(0); i < 16; i++ {
+		pin := machine.Pin(i + uint8(firstPin))
+		pin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	}
+
+	return rp2040Bus{
+		firstPin: firstPin,
+	}
+
+}
+
+func (b rp2040Bus) Set(data uint16) {
+	data32 := uint32(data)
+	rp.SIO.GPIO_OUT_CLR.Set(0xFFFF << b.firstPin)
+	rp.SIO.GPIO_OUT_SET.Set(data32 << b.firstPin)
+}