From 6a1f431babf308821cc196489181231fec8ad269 Mon Sep 17 00:00:00 2001
From: maro159 <mrcm777@gmail.com>
Date: Tue, 5 Dec 2023 22:41:42 +0100
Subject: [PATCH 1/2] add function clear_square

Add function ssd1306_clear_square() which may be used to optimize display routines ex. to change only a single line of text
---
 ssd1306.c |  7 ++++++-
 ssd1306.h | 11 +++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/ssd1306.c b/ssd1306.c
index f57975e..1ce7d9d 100644
--- a/ssd1306.c
+++ b/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) {
diff --git a/ssd1306.h b/ssd1306.h
index 4da0720..03e7fae 100644
--- a/ssd1306.h
+++ b/ssd1306.h
@@ -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
 

From 85614b1b306d75195cd9066a306051d688633e4a Mon Sep 17 00:00:00 2001
From: maro159 <mrcm777@gmail.com>
Date: Tue, 5 Dec 2023 22:42:03 +0100
Subject: [PATCH 2/2] fix typo

---
 ssd1306.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ssd1306.h b/ssd1306.h
index 03e7fae..138cef3 100644
--- a/ssd1306.h
+++ b/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