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feat(EVE): allow disabling write buffering (#9072)

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Co-authored-by: André Costa <andre_miguel_costa@hotmail.com>
This commit is contained in:
Liam Howatt
2025-10-16 16:42:27 +02:00
committed by GitHub
parent 073f9c140f
commit 64117b1757
5 changed files with 27 additions and 4 deletions
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Kconfig
+1 -1
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@@ -544,7 +544,7 @@ menu "LVGL configuration"
depends on LV_USE_DRAW_EVE
config LV_DRAW_EVE_WRITE_BUFFER_SIZE
int "Max bytes to buffer for each SPI transmission"
int "Max bytes to buffer for each SPI transmission or 0 to disable buffering"
default 2048
depends on LV_USE_DRAW_EVE
lv_conf_template.h
+3 -1
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@@ -395,7 +395,9 @@
/* EVE_GEN value: 2, 3, or 4 */
#define LV_DRAW_EVE_EVE_GENERATION 4
/* the maximum number of bytes to buffer before a single SPI transmission */
/* The maximum number of bytes to buffer before a single SPI transmission.
* Set it to 0 to disable write buffering.
*/
#define LV_DRAW_EVE_WRITE_BUFFER_SIZE 2048
#endif
src/draw/eve/lv_draw_eve_private.h
+10 -1
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@@ -33,6 +33,13 @@ extern "C" {
#include "../../font/lv_font_fmt_txt.h"
#include "../lv_draw_arc.h"
#if LV_DRAW_EVE_WRITE_BUFFER_SIZE != 0 && LV_DRAW_EVE_WRITE_BUFFER_SIZE < 4
#warning LV_DRAW_EVE_WRITE_BUFFER_SIZE cannot be less than 4. Using 0 (buffering disabled).
#define LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL 0
#else
#define LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL LV_DRAW_EVE_WRITE_BUFFER_SIZE
#endif
/*********************
* DEFINES
*********************/
@@ -60,8 +67,10 @@ struct _lv_draw_eve_unit_t {
lv_draw_eve_ramg_t ramg;
lv_draw_eve_parameters_t params;
lv_draw_eve_operation_cb_t op_cb;
#if LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL
uint32_t lv_eve_write_buf_len;
uint8_t lv_eve_write_buf[LV_DRAW_EVE_WRITE_BUFFER_SIZE];
uint8_t lv_eve_write_buf[LV_DRAW_EVE_WRITE_BUFFER_SIZE_INTERNAL];
#endif
};
/**********************
src/libs/FT800-FT813/EVE_target.h
+10
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@@ -39,10 +39,14 @@ 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)) {
lv_eve_target_flush_write_buf();
}
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
}
static inline void spi_transmit_32(uint32_t data)
@@ -50,6 +54,7 @@ static inline void spi_transmit_32(uint32_t data)
#if LV_BIG_ENDIAN_SYSTEM
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)) {
lv_eve_target_flush_write_buf();
}
@@ -58,6 +63,9 @@ static inline void spi_transmit_32(uint32_t data)
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
}
static inline void lv_eve_target_spi_transmit_buf(const void * data, uint32_t size)
@@ -68,11 +76,13 @@ 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) {
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;
#endif
}
static inline void spi_transmit_burst(uint32_t data)
src/lv_conf_internal.h
+3 -1
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@@ -1122,7 +1122,9 @@
#endif
#endif
/* the maximum number of bytes to buffer before a single SPI transmission */
/* The maximum number of bytes to buffer before a single SPI transmission.
* Set it to 0 to disable write buffering.
*/
#ifndef LV_DRAW_EVE_WRITE_BUFFER_SIZE
#ifdef CONFIG_LV_DRAW_EVE_WRITE_BUFFER_SIZE
#define LV_DRAW_EVE_WRITE_BUFFER_SIZE CONFIG_LV_DRAW_EVE_WRITE_BUFFER_SIZE