Remove backlight control from anywhere except platform.c and platform.h

openrtx/include/interfaces/display.h

@@ -44,13 +44,12 @@
  */
 
 /**
- * This function initialises the display, configures backlight control and
- * allocates framebuffer on the heap. After initialisation, backlight is set
- * to zero.
+ * This function initialises the display and allocates framebuffer on the heap.
+ *
  * NOTE: framebuffer allocation is the first operation performed, if fails an
  * error message is printed on the virtual COM port and this function returns
- * prematurely, without configuring the display and the backlight timer. Thus, a
- * dark screen can be symptom of failed allocation.
+ * prematurely, without configuring the display. 
+ * Thus, a dark screen can be symptom of failed allocation.
  */
 void display_init();
 
@@ -70,7 +69,7 @@ void display_init();
 void *display_getFrameBuffer();
 
 /**
- * When called, this function turns off backlight, shuts down backlight control
+ * When called, this function terminates the display driver 
  * and deallocates the framebuffer.
  */
 void display_terminate();

openrtx/include/interfaces/graphics.h

@@ -29,7 +29,7 @@
  * This interface is based on the lower level interface display.h
  * Many methods of graphics.h are basically calls to methods in display.h.
  *
- * On top of basic framebuffer and backlight control, graphics.h implements
+ * On top of basic framebuffer control, graphics.h implements
  * graphics primitives for drawing fonts and shapes
  *
  *********************** HOW TO MANAGE FRAMEBUFFER *****************************
@@ -88,13 +88,13 @@ typedef enum
 
 /**
  * This function calls the correspondent method of the low level interface display.h
- * It initializes the display and sets the backlight to zero.
+ * It initializes the display.
  */
 void gfx_init();
 
 /**
  * This function calls the correspondent method of the low level interface display.h
- * It turns off backlight, shuts down backlight control and deallocates the framebuffer.
+ * It terminates the display driver and deallocates the framebuffer.
  */
 void gfx_terminate();
 
@@ -112,14 +112,6 @@ uint16_t gfx_screenWidth();
  */
 uint16_t gfx_screenHeight();
 
-/**
- * This function calls the correspondent method of the low level interface display.h
- * Set screen backlight to a given level.
- * @param level: backlight level, from 0 (backlight off) to 255 (backlight at
- * full brightness).
- */
-void gfx_setBacklightLevel(uint8_t level);
-
 /**
  * This function calls the correspondent method of the low level interface display.h
  * Copy a given section, between two given rows, of framebuffer content to the

platform/drivers/display/HX83XX_md380.c

@@ -342,7 +342,7 @@ void display_init()
 
 void display_terminate()
 {
-    /* Shut off backlight, FSMC and deallocate framebuffer */
+    /* Shut off FSMC and deallocate framebuffer */
     gpio_setMode(GPIOC, 6, OUTPUT);
     gpio_clearPin(GPIOC, 6);
     RCC->AHB3ENR &= ~RCC_AHB3ENR_FSMCEN;

platform/drivers/display/display_libSDL.c

@@ -185,11 +185,6 @@ uint16_t display_screenHeight()
     return SCREEN_HEIGHT;
 }
 
-void display_setBacklightLevel(uint8_t level)
-{
-    printf("Backlight level set to %d\n", level);
-}
-
 void display_renderRows(uint8_t startRow, uint8_t endRow)
 {
     Uint32 *pixels = (Uint32*)renderSurface->pixels;