added func to just clear the buffer

idf_component.yml

@@ -1,5 +1,5 @@
-version: "1.0.0"
+version: "1.1"
 description: "ST7567 I2C 128x64 display driver"
 url: "https://git.drath.cc/you/esp-st7567"
 dependencies:
-  idf: ">=5.2"
+  idf: ">=5.2"

st7567.c

@@ -82,8 +82,12 @@ esp_err_t st7567_init(const st7567_config_t *config, st7567_device_t *device) {
     return ESP_OK;
 }
 
-esp_err_t st7567_clear(st7567_device_t *dev) {
+void st7567_clear_buffer(st7567_device_t *dev) {
     memset(dev->framebuffer, 0, sizeof(dev->framebuffer));
+}
+
+esp_err_t st7567_clear(st7567_device_t *dev) {
+    st7567_clear_buffer(dev);
     return st7567_update_screen(dev);
 }
 

st7567.h

@@ -78,6 +78,13 @@ esp_err_t st7567_send_cmd(const st7567_device_t *dev, uint8_t cmd);
  */
 esp_err_t st7567_send_data(const st7567_device_t *dev, const uint8_t *data, size_t len);
 
+/**
+ * @brief Clear the display (just wipe framebuffer, don't send any commands)
+ *
+ * @param dev Device handle
+ */
+void st7567_clear_buffer(st7567_device_t *dev);
+
 /**
  * @brief Clear the display (both GDRAM and local framebuffer)
  *