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commit 25443a37ee1f614b59145f8a9f99ec1e875fa909
Author: wangjianyu3 <wangjian...@xiaomi.com>
AuthorDate: Sat Apr 5 22:22:47 2025 +0800
boards/szpi-esp32s3: Set default backlight for LCD
Set default brightness of LCD backlight to about 10%.
Signed-off-by: wangjianyu3 <wangjian...@xiaomi.com>
---
.../esp32s3/lckfb-szpi-esp32s3/src/esp32s3-szpi.h | 3 ++
.../lckfb-szpi-esp32s3/src/esp32s3_board_lcd.c | 56 +++++++++++++++++++---
.../lckfb-szpi-esp32s3/src/esp32s3_board_spi.c | 11 +++--
3 files changed, 59 insertions(+), 11 deletions(-)
diff --git a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3-szpi.h
b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3-szpi.h
index bf888c54ea..cb0724249a 100644
--- a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3-szpi.h
+++ b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3-szpi.h
@@ -39,6 +39,9 @@
#define GPIO_LCD_DC (39)
#define GPIO_LCD_RST (-1)
#define SZPI_LCD_CS_PATH "/dev/gpio0"
+#define SZPI_LCD_PWM_PATH "/dev/pwm0"
+#define SZPI_LCD_PWM_FREQ (100)
+#define SZPI_LCD_PWM_DUTY (0xe666) /* 0x1 ~ 0xffff */
#define FT5X06_I2C_ADDRESS (0x38)
#define FT5X06_FREQUENCY (400000)
diff --git a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_lcd.c
b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_lcd.c
index b7d36e69a0..e7cca55a8f 100644
--- a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_lcd.c
+++ b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_lcd.c
@@ -31,6 +31,7 @@
#include <fcntl.h>
#include <debug.h>
#include <errno.h>
+#include <sys/ioctl.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
@@ -39,6 +40,7 @@
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/st7789.h>
#include <nuttx/fs/fs.h>
+#include <nuttx/timers/pwm.h>
#include <arch/board/board.h>
@@ -58,6 +60,7 @@
static struct spi_dev_s *g_spidev;
static struct lcd_dev_s *g_lcd;
+static struct file g_pwm_file;
/****************************************************************************
* Public Functions
@@ -78,27 +81,56 @@ static struct lcd_dev_s *g_lcd;
int board_lcd_initialize(void)
{
+ struct pwm_info_s pwm;
+ struct file f;
ssize_t n;
- int fd;
+ int ret;
/* Pull down C/S */
- fd = nx_open(SZPI_LCD_CS_PATH, O_RDWR);
- if (fd < 0)
+ ret = file_open(&f, SZPI_LCD_CS_PATH, O_RDWR);
+ if (ret < 0)
{
spierr("open C/S pin failed\n");
return -ENODEV;
}
- n = nx_write(fd, "1", 1);
- nx_close(fd);
+ n = file_write(&f, "1", 1);
+ file_close(&f);
if (n != 1)
{
spierr("write C/S pin failed\n");
return -EIO;
}
- /* Turn on LCD backlight */
+ /* Turn on LCD backlight (10% brightness) */
+
+ pwm.frequency = SZPI_LCD_PWM_FREQ;
+ pwm.duty = SZPI_LCD_PWM_DUTY;
+
+ ret = file_open(&g_pwm_file, SZPI_LCD_PWM_PATH, O_RDONLY);
+ if (ret < 0)
+ {
+ pwmerr("Open PWM failed\n");
+ return -ENODEV;
+ }
+
+ ret = file_ioctl(&g_pwm_file, PWMIOC_SETCHARACTERISTICS,
+ (unsigned long)((uintptr_t)&pwm));
+ if (ret < 0)
+ {
+ pwmerr("Set PWM failed\n");
+ file_close(&g_pwm_file);
+ return -ENOTTY;
+ }
+
+ ret = file_ioctl(&g_pwm_file, PWMIOC_START, 0);
+ if (ret < 0)
+ {
+ pwmerr("Start PWM failed\n");
+ file_close(&g_pwm_file);
+ return -ENOTTY;
+ }
g_spidev = esp32s3_spibus_initialize(ESP32S3_SPI2);
if (!g_spidev)
@@ -161,7 +193,19 @@ struct lcd_dev_s *board_lcd_getdev(int devno)
void board_lcd_uninitialize(void)
{
+ int ret;
+
/* Turn the display off */
g_lcd->setpower(g_lcd, 0);
+
+ /* Close backlight PWM */
+
+ ret = file_ioctl(&g_pwm_file, PWMIOC_STOP, 0);
+ if (ret < 0)
+ {
+ pwmerr("Stop PWM failed\n");
+ }
+
+ file_close(&g_pwm_file);
}
diff --git a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_spi.c
b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_spi.c
index 271874ab15..3ea1c837e6 100644
--- a/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_spi.c
+++ b/boards/xtensa/esp32s3/lckfb-szpi-esp32s3/src/esp32s3_board_spi.c
@@ -90,23 +90,24 @@ int esp32s3_spi2_cmddata(struct spi_dev_s *dev, uint32_t
devid, bool cmd)
#if defined(CONFIG_ESP32S3_SPI2) && defined(CONFIG_ESP32S3_SPI_UDCS)
void esp32s3_spi2_select(struct spi_dev_s *dev, uint32_t devid, bool select)
{
+ struct file f;
ssize_t n;
- int fd;
+ int ret;
- fd = nx_open(SZPI_LCD_CS_PATH, O_RDWR);
- if (fd < 0)
+ ret = file_open(&f, SZPI_LCD_CS_PATH, O_RDWR);
+ if (ret < 0)
{
spierr("open C/S pin failed\n");
return;
}
- n = nx_write(fd, select ? "0" : "1", 1);
+ n = file_write(&f, select ? "0" : "1", 1);
if (n != 1)
{
spierr("write C/S pin failed\n");
}
- nx_close(fd);
+ file_close(&f);
}
#endif
