From 1e40f873a5e4ccc7362718acbe63c981e5b40c5c Mon Sep 17 00:00:00 2001
From: aanper <mail@s3f.ru>
Date: Thu, 15 Oct 2020 19:15:53 +0300
Subject: [PATCH] backlight control

---
 applications/applications.mk                  |  1 +
 .../backlight-control/backlight-control.c     | 30 +++++++++++++++++++
 applications/startup.h                        |  2 ++
 3 files changed, 33 insertions(+)
 create mode 100644 applications/backlight-control/backlight-control.c

diff --git a/applications/applications.mk b/applications/applications.mk
index d60ed2d5..e8f61573 100644
--- a/applications/applications.mk
+++ b/applications/applications.mk
@@ -81,6 +81,7 @@ APP_GUI	?= 0
 ifeq ($(APP_GUI), 1)
 CFLAGS		+= -DAPP_GUI
 C_SOURCES	+= $(wildcard $(APP_DIR)/gui/*.c)
+C_SOURCES	+= $(wildcard $(APP_DIR)/backlight-control/*.c)
 endif
 
 ifeq ($(APP_DISPLAY), 1)
diff --git a/applications/backlight-control/backlight-control.c b/applications/backlight-control/backlight-control.c
new file mode 100644
index 00000000..ef22f3df
--- /dev/null
+++ b/applications/backlight-control/backlight-control.c
@@ -0,0 +1,30 @@
+#include "flipper.h"
+
+static void event_cb(const void* value, size_t size, void* ctx) {
+    xSemaphoreGive((SemaphoreHandle_t*)ctx);
+}
+
+const uint32_t BACKLIGHT_TIME = 10000;
+
+void backlight_control(void* p) {
+    // TODO use FURI
+    HAL_GPIO_WritePin(DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin, GPIO_PIN_SET);
+
+    StaticSemaphore_t event_descriptor;
+    SemaphoreHandle_t update = xSemaphoreCreateCountingStatic(255, 0, &event_descriptor);
+
+    // open record
+    furi_open_deprecated("input_events", false, false, event_cb, NULL, (void*)update);
+
+    // we ready to work
+    furiac_ready();
+
+    while(1) {
+        // wait for event
+        if(xSemaphoreTake(update, BACKLIGHT_TIME) == pdTRUE) {
+            HAL_GPIO_WritePin(DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin, GPIO_PIN_SET);
+        } else {
+            HAL_GPIO_WritePin(DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin, GPIO_PIN_RESET);
+        }
+    }
+}
\ No newline at end of file
diff --git a/applications/startup.h b/applications/startup.h
index 58c8c11d..847009dc 100644
--- a/applications/startup.h
+++ b/applications/startup.h
@@ -26,6 +26,7 @@ void coreglitch_demo_0(void* p);
 void u8g2_qrcode(void* p);
 void fatfs_list(void* p);
 void gui_task(void* p);
+void backlight_control(void* p);
 
 const FlipperStartupApp FLIPPER_STARTUP[] = {
 #ifdef APP_DISPLAY
@@ -37,6 +38,7 @@ const FlipperStartupApp FLIPPER_STARTUP[] = {
 #endif
 
 #ifdef APP_GUI
+    {.app = backlight_control, .name = "backlight_control", .libs = {1, FURI_LIB{"input_task"}}},
     {.app = gui_task, .name = "gui_task", .libs = {0}},
 #endif