From 914abd85624af2be6092582eff90ac89fd2bd30a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mario=20H=C3=BCttel?= <mario.huettel@gmx.net>
Date: Sun, 30 Aug 2020 18:20:58 +0200
Subject: [PATCH] Issue #17: Add override function for button

---
 stm-firmware/button.c                           | 13 +++++++++++++
 stm-firmware/include/reflow-controller/button.h |  5 +++++
 2 files changed, 18 insertions(+)

diff --git a/stm-firmware/button.c b/stm-firmware/button.c
index ec6a3fb..30939ec 100644
--- a/stm-firmware/button.c
+++ b/stm-firmware/button.c
@@ -29,6 +29,7 @@
 
 static volatile uint64_t IN_SECTION(.ccm.bss) to_active_timestamp;
 static volatile enum button_state IN_SECTION(.ccm.bss) int_state;
+static volatile enum button_state IN_SECTION(.ccm.bss) override_state;
 
 void button_init()
 {
@@ -40,6 +41,7 @@ void button_init()
 
 	to_active_timestamp = 0ULL;
 	int_state = BUTTON_IDLE;
+	override_state = BUTTON_IDLE;
 
 	SYSCFG->EXTICR[1] |= 0x3;
 	EXTI->IMR |= (1U<<4);
@@ -53,6 +55,12 @@ enum button_state button_read_event()
 	uint64_t time_delta;
 	enum button_state temp_state;
 
+	if (override_state != BUTTON_IDLE) {
+		temp_state = override_state;
+		override_state = BUTTON_IDLE;
+		return temp_state;
+	}
+
 	if (BUTTON_PORT->IDR & (1U<<BUTTON_PIN)) {
 		temp_state = int_state;
 		int_state = BUTTON_IDLE;
@@ -96,3 +104,8 @@ void EXTI4_IRQHandler(void)
 		to_active_timestamp = systick_get_global_tick();
 	}
 }
+
+void button_override_event(enum button_state state)
+{
+	override_state = state;
+}
diff --git a/stm-firmware/include/reflow-controller/button.h b/stm-firmware/include/reflow-controller/button.h
index 6da147e..b98c957 100644
--- a/stm-firmware/include/reflow-controller/button.h
+++ b/stm-firmware/include/reflow-controller/button.h
@@ -72,5 +72,10 @@ enum button_state button_read_event();
  */
 void button_deinit();
 
+/**
+ * @brief This function overrides the button event.
+ * @param state State to set
+ */
+void button_override_event(enum button_state state);
 
 #endif /* __BUTTON_H__ */