From efd9cf72bab54cb3c7272e7833ecca312b916c6d Mon Sep 17 00:00:00 2001
From: cn <cn@mycrobase.de>
Date: Mon, 16 Sep 2019 12:49:29 +0200
Subject: [PATCH] machine/stm32f103xx: add machine.Pin.Get method for reading
 GPIO values

Writing pin values was already possible but reading was missing.
---
 src/machine/machine_stm32f103xx.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/machine/machine_stm32f103xx.go b/src/machine/machine_stm32f103xx.go
index 552e540b..44fa8742 100644
--- a/src/machine/machine_stm32f103xx.go
+++ b/src/machine/machine_stm32f103xx.go
@@ -99,6 +99,14 @@ func (p Pin) Set(high bool) {
 	}
 }
 
+// Get returns the current value of a GPIO pin.
+func (p Pin) Get() bool {
+	port := p.getPort()
+	pin := uint8(p) % 16
+	val := port.IDR.Get() & (1 << pin)
+	return (val > 0)
+}
+
 // UART
 type UART struct {
 	Buffer *RingBuffer