From 915ae9e69a1c1ba2df7af988b4c1395810f73824 Mon Sep 17 00:00:00 2001
From: Shuanglei Tao <tsl0922@gmail.com>
Date: Fri, 23 May 2025 17:19:47 +0800
Subject: [PATCH] add clear without refresh support

---
 EPD/EPD_driver.h  | 2 +-
 EPD/EPD_service.c | 2 +-
 EPD/SSD1619.c     | 4 ++--
 EPD/UC8176.c      | 4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/EPD/EPD_driver.h b/EPD/EPD_driver.h
index fd1af4b..78cc41d 100644
--- a/EPD/EPD_driver.h
+++ b/EPD/EPD_driver.h
@@ -31,7 +31,7 @@
 typedef struct
 {
     void (*init)();                                   /**< Initialize the e-Paper register */
-    void (*clear)(void);                              /**< Clear screen */
+    void (*clear)(bool refresh);                      /**< Clear screen */
     void (*write_image)(uint8_t *black, uint8_t *color, uint16_t x, uint16_t y, uint16_t w, uint16_t h); /**< write image */
     void (*refresh)(void);                            /**< Sends the image buffer in RAM to e-Paper and displays */
     void (*sleep)(void);                              /**< Enter sleep mode */
diff --git a/EPD/EPD_service.c b/EPD/EPD_service.c
index 9921f70..dd6b078 100644
--- a/EPD/EPD_service.c
+++ b/EPD/EPD_service.c
@@ -115,7 +115,7 @@ static void epd_service_on_write(ble_epd_t * p_epd, uint8_t * p_data, uint16_t l
 
       case EPD_CMD_CLEAR:
           p_epd->display_mode = MODE_NONE;
-          p_epd->epd->drv->clear();
+          p_epd->epd->drv->clear(length > 1 ? p_data[1] : true);
           break;
 
       case EPD_CMD_SEND_COMMAND:
diff --git a/EPD/SSD1619.c b/EPD/SSD1619.c
index ded212f..8abd667 100644
--- a/EPD/SSD1619.c
+++ b/EPD/SSD1619.c
@@ -118,7 +118,7 @@ static void SSD1619_Refresh(void)
     SSD1619_Update(0x83); // power off
 }
 
-void SSD1619_Clear(void)
+void SSD1619_Clear(bool refresh)
 {
     epd_model_t *EPD = epd_get();
     uint16_t Width = (EPD->width + 7) / 8;
@@ -138,7 +138,7 @@ void SSD1619_Clear(void)
         }
     }
 
-    SSD1619_Refresh();
+    if (refresh) SSD1619_Refresh();
 }
 
 void SSD1619_Write_Image(uint8_t *black, uint8_t *color, uint16_t x, uint16_t y, uint16_t w, uint16_t h)
diff --git a/EPD/UC8176.c b/EPD/UC8176.c
index a52f40a..eb0f930 100644
--- a/EPD/UC8176.c
+++ b/EPD/UC8176.c
@@ -141,11 +141,11 @@ static void UC8176_Write_RAM(uint8_t cmd, uint8_t value)
     }
 }
 
-void UC8176_Clear(void)
+void UC8176_Clear(bool refresh)
 {
     UC8176_Write_RAM(CMD_DTM1, 0xFF);
     UC8176_Write_RAM(CMD_DTM2, 0xFF);
-    UC8176_Refresh();
+    if (refresh) UC8176_Refresh();
 }
 
 static void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h)