diff --git a/include/lvgl/drivers/display/lv_draw_eve_target.h b/include/lvgl/drivers/display/lv_draw_eve_target.h
index 72092c750..43a1caa7e 100644
--- a/include/lvgl/drivers/display/lv_draw_eve_target.h
+++ b/include/lvgl/drivers/display/lv_draw_eve_target.h
@@ -48,7 +48,8 @@ typedef enum {
     LV_DRAW_EVE_OPERATION_CS_ASSERT,       /**< set the "CS_N" pin low */
     LV_DRAW_EVE_OPERATION_CS_DEASSERT,     /**< set the "CS_N" pin high */
     LV_DRAW_EVE_OPERATION_SPI_SEND,        /**< send `length` bytes of `data` over SPI */
-    LV_DRAW_EVE_OPERATION_SPI_RECEIVE      /**< receive `length` bytes into `data` from SPI */
+    LV_DRAW_EVE_OPERATION_SPI_RECEIVE,     /**< receive `length` bytes into `data` from SPI */
+    LV_DRAW_EVE_OPERATION_DELAY_MS         /**< implement a platform specific delay function */
 } lv_draw_eve_operation_t;
 
 typedef void (*lv_draw_eve_operation_cb_t)(lv_display_t * disp, lv_draw_eve_operation_t operation, void * data,
diff --git a/src/draw/eve/lv_draw_eve_arc.c b/src/draw/eve/lv_draw_eve_arc.c
index 9c355458e..a6ad3302e 100644
--- a/src/draw/eve/lv_draw_eve_arc.c
+++ b/src/draw/eve/lv_draw_eve_arc.c
@@ -52,7 +52,7 @@ static int32_t chord_length(int16_t radius, int16_t angle_degrees)
     angle_degrees %= 360;
     if(angle_degrees < 0) angle_degrees += 360;
     int32_t sin_value = lv_trigo_sin(angle_degrees / 2);
-    int64_t chord_length = 2 * radius * sin_value / 32768.0;
+    int32_t chord_length = (int32_t)(2 * radius * sin_value / 32768.0);
     return (int32_t)chord_length ;
 }
 
diff --git a/src/drivers/display/ft81x/lv_ft81x_defines.h b/src/drivers/display/ft81x/lv_ft81x_defines.h
index 9a81cd652..a0f3ef7e4 100644
--- a/src/drivers/display/ft81x/lv_ft81x_defines.h
+++ b/src/drivers/display/ft81x/lv_ft81x_defines.h
@@ -19,6 +19,10 @@ extern "C" {
  *      DEFINES
  *********************/
 
+#if LV_USE_DRAW_EVE
+	//Exclude all this file to avoid redefining what is in the EVE GPU driver.
+#else  //NOT LV_USE_DRAW_EVE
+
 /* ft81x and ft80x each define exclusive
  * definitions. Define ft81x for now.
  *
@@ -827,6 +831,7 @@ extern "C" {
 
 #endif
 
+#endif //NOT LV_USE_DRAW_EVE
 /**********************
  *      TYPEDEFS
  **********************/
diff --git a/src/libs/FT800-FT813/EVE_target.h b/src/libs/FT800-FT813/EVE_target.h
index 2a26c1b55..118d60963 100644
--- a/src/libs/FT800-FT813/EVE_target.h
+++ b/src/libs/FT800-FT813/EVE_target.h
@@ -5,14 +5,14 @@
 #include "../../draw/eve/lv_draw_eve_private.h"
 #include "../../core/lv_global.h"
 
-#define lv_eve_write_buf (LV_GLOBAL_DEFAULT()->draw_eve_unit->lv_eve_write_buf)
-#define lv_eve_write_buf_len (LV_GLOBAL_DEFAULT()->draw_eve_unit->lv_eve_write_buf_len)
+#define _lv_eve_write_buf (LV_GLOBAL_DEFAULT()->draw_eve_unit->lv_eve_write_buf)
+#define _lv_eve_write_buf_len (LV_GLOBAL_DEFAULT()->draw_eve_unit->lv_eve_write_buf_len)
 
 static inline void lv_eve_target_flush_write_buf(void);
 
 static inline void DELAY_MS(uint16_t ms)
 {
-    lv_delay_ms(ms);
+    lv_draw_eve_unit_g->op_cb(lv_draw_eve_unit_g->disp, LV_DRAW_EVE_OPERATION_DELAY_MS, NULL, ms);
 }
 
 static inline void EVE_cs_set(void)
@@ -39,10 +39,10 @@ static inline void EVE_pdn_clear(void)
 static inline void spi_transmit(uint8_t data)
 {
 #if LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL
-    if(lv_eve_write_buf_len == sizeof(lv_eve_write_buf)) {
+    if(_lv_eve_write_buf_len == sizeof(_lv_eve_write_buf)) {
         lv_eve_target_flush_write_buf();
     }
-    lv_eve_write_buf[lv_eve_write_buf_len++] = data;
+    _lv_eve_write_buf[_lv_eve_write_buf_len++] = data;
 #else
     lv_draw_eve_unit_g->op_cb(lv_draw_eve_unit_g->disp, LV_DRAW_EVE_OPERATION_SPI_SEND, &data, sizeof(data));
 #endif
@@ -54,14 +54,14 @@ static inline void spi_transmit_32(uint32_t data)
     data = lv_swap_bytes_32(data);
 #endif
 #if LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL
-    if(lv_eve_write_buf_len + 4 > sizeof(lv_eve_write_buf)) {
+    if(_lv_eve_write_buf_len + 4 > sizeof(_lv_eve_write_buf)) {
         lv_eve_target_flush_write_buf();
     }
     uint8_t * buf4 = (uint8_t *) &data;
-    lv_eve_write_buf[lv_eve_write_buf_len++] = buf4[0];
-    lv_eve_write_buf[lv_eve_write_buf_len++] = buf4[1];
-    lv_eve_write_buf[lv_eve_write_buf_len++] = buf4[2];
-    lv_eve_write_buf[lv_eve_write_buf_len++] = buf4[3];
+    _lv_eve_write_buf[_lv_eve_write_buf_len++] = buf4[0];
+    _lv_eve_write_buf[_lv_eve_write_buf_len++] = buf4[1];
+    _lv_eve_write_buf[_lv_eve_write_buf_len++] = buf4[2];
+    _lv_eve_write_buf[_lv_eve_write_buf_len++] = buf4[3];
 #else
     lv_draw_eve_unit_g->op_cb(lv_draw_eve_unit_g->disp, LV_DRAW_EVE_OPERATION_SPI_SEND, &data, sizeof(data));
 #endif
@@ -76,12 +76,12 @@ static inline void lv_eve_target_spi_transmit_buf(const void * data, uint32_t si
 static inline void lv_eve_target_flush_write_buf(void)
 {
 #if LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL
-    if(lv_eve_write_buf_len == 0) {
+    if(_lv_eve_write_buf_len == 0) {
         return;
     }
-    lv_draw_eve_unit_g->op_cb(lv_draw_eve_unit_g->disp, LV_DRAW_EVE_OPERATION_SPI_SEND, lv_eve_write_buf,
-                              lv_eve_write_buf_len);
-    lv_eve_write_buf_len = 0;
+    lv_draw_eve_unit_g->op_cb(lv_draw_eve_unit_g->disp, LV_DRAW_EVE_OPERATION_SPI_SEND, _lv_eve_write_buf,
+                              _lv_eve_write_buf_len);
+    _lv_eve_write_buf_len = 0;
 #endif
 }