Function set_lcd_backlight

bsp/allwinner/libraries/drivers/drv_lcd.c:500–511

}

void set_lcd_backlight(rt_uint8_t value)
{
    struct rt_device_pwm *pwm_dev;
    pwm_dev = (struct rt_device_pwm *)rt_device_find(_panel->bl_pwm_name);
    if (pwm_dev == RT_NULL)
    {
        rt_kprintf("%s open fail\n", _panel->bl_pwm_name);
        return;
    }
    rt_pwm_set(pwm_dev, LCD_PWM_DEV_CHANNEL, 1000000000 / _panel->bl_pwm_hz, value * (10000000 / _panel->bl_pwm_hz));
    rt_pwm_enable(pwm_dev, LCD_PWM_DEV_CHANNEL);
}

rt_uint8_t get_lcd_backlight(void)
{