Merge pull request #16 from maro159/main

Add ssd1306_clear_square function

ssd1306.c

@@ -174,11 +174,16 @@ void ssd1306_draw_line(ssd1306_t *p, int32_t x1, int32_t y1, int32_t x2, int32_t
     }
 }
 
+void ssd1306_clear_square(ssd1306_t *p, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
+    for(uint32_t i=0; i<width; ++i)
+        for(uint32_t j=0; j<height; ++j)
+            ssd1306_clear_pixel(p, x+i, y+j);
+}
+
 void ssd1306_draw_square(ssd1306_t *p, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
     for(uint32_t i=0; i<width; ++i)
         for(uint32_t j=0; j<height; ++j)
             ssd1306_draw_pixel(p, x+i, y+j);
-
 }
 
 void ssd1306_draw_empty_square(ssd1306_t *p, uint32_t x, uint32_t y, uint32_t width, uint32_t height) {

ssd1306.h

@@ -162,7 +162,7 @@ void ssd1306_clear_pixel(ssd1306_t *p, uint32_t x, uint32_t y);
 void ssd1306_draw_pixel(ssd1306_t *p, uint32_t x, uint32_t y);
 
 /**
-	@brief draw pixel on buffer
+	@brief draw line on buffer
 
 	@param[in] p : instance of display
 	@param[in] x1 : x position of starting point
@@ -172,6 +172,17 @@ void ssd1306_draw_pixel(ssd1306_t *p, uint32_t x, uint32_t y);
 */
 void ssd1306_draw_line(ssd1306_t *p, int32_t x1, int32_t y1, int32_t x2, int32_t y2);
 
+/**
+	@brief clear square at given position with given size
+
+	@param[in] p : instance of display
+	@param[in] x : x position of starting point
+	@param[in] y : y position of starting point
+	@param[in] width : width of square
+	@param[in] height : height of square
+*/
+void ssd1306_clear_square(ssd1306_t *p, uint32_t x, uint32_t y, uint32_t width, uint32_t height);
+
 /**
 	@brief draw filled square at given position with given size