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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-10-30 Tanek the first version
* 2018-04-05 Liu2guang export LCD config parameters.
*/
#include <rtthread.h>
#ifdef BSP_USING_LCD
#include "drv_lcd.h"
#include "fsl_common.h"
#include "fsl_iomuxc.h"
#include "fsl_elcdif.h"
#include "drv_gpio.h"
#define LOG_TAG "drv.lcd"
#include <drv_log.h>
#if !defined(LCD_WIDTH) || !defined(LCD_HEIGHT)
#error "Please config lcd pixel parameters."
#endif
#if !defined(LCD_HFP) || !defined(LCD_HBP) || !defined(LCD_HSW) || \
!defined(LCD_VFP) || !defined(LCD_VBP) || !defined(LCD_VSW)
#error "Please config lcd timing parameters."
#endif
#if !defined(LCD_BL_PIN) || !defined(LCD_RST_PIN)
#error "Please config lcd backlight or reset pin."
#endif
struct imxrt_lcd
{
struct rt_device device;
struct rt_device_graphic_info info;
};
static struct imxrt_lcd lcd;
AT_NONCACHEABLE_SECTION_ALIGN(static uint16_t frame_buffer[LCD_HEIGHT][LCD_WIDTH], 64);
static rt_err_t imxrt_lcd_init(rt_device_t device)
{
RT_ASSERT(device != RT_NULL);
rt_memset(frame_buffer, 0x00, sizeof(frame_buffer));
clock_video_pll_config_t pll_config;
pll_config.loopDivider = 43;
pll_config.postDivider = 4;
pll_config.numerator = 0;
pll_config.denominator = 0;
CLOCK_InitVideoPll(&pll_config);
rt_pin_mode(LCD_RST_PIN, PIN_MODE_OUTPUT); /* LCD_RESET */
rt_pin_write(LCD_RST_PIN, PIN_LOW);
rt_thread_delay(RT_TICK_PER_SECOND / 100);
rt_pin_write(LCD_RST_PIN, PIN_HIGH);
rt_pin_mode (LCD_BL_PIN, PIN_MODE_OUTPUT); /* LCD_BL */
rt_pin_write(LCD_BL_PIN, PIN_HIGH);
/* LCD */
elcdif_rgb_mode_config_t lcd_config;
lcd_config.hfp = LCD_HFP;
lcd_config.vfp = LCD_VFP;
lcd_config.hbp = LCD_HBP;
lcd_config.vbp = LCD_VBP;
lcd_config.hsw = LCD_HSW;
lcd_config.vsw = LCD_VSW;
lcd_config.polarityFlags = kELCDIF_DataEnableActiveHigh |
kELCDIF_VsyncActiveHigh |
kELCDIF_HsyncActiveLow |
kELCDIF_DriveDataOnRisingClkEdge;
lcd_config.panelWidth = LCD_WIDTH;
lcd_config.panelHeight = LCD_HEIGHT;
lcd_config.pixelFormat = kELCDIF_PixelFormatRGB565;
lcd_config.dataBus = kELCDIF_DataBus16Bit;
lcd_config.bufferAddr = (uint32_t)frame_buffer;
ELCDIF_RgbModeInit (LCDIF, &lcd_config);
ELCDIF_RgbModeStart(LCDIF);
/* LCD DEVICE */
lcd.info.width = LCD_WIDTH;
lcd.info.height = LCD_HEIGHT;
lcd.info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565;
lcd.info.bits_per_pixel = 16;
lcd.info.framebuffer = (void *)frame_buffer;
return RT_EOK;
}
static rt_err_t imxrt_lcd_control(rt_device_t device, int cmd, void *args)
{
switch(cmd)
{
case RTGRAPHIC_CTRL_RECT_UPDATE:
break;
case RTGRAPHIC_CTRL_POWERON:
rt_pin_write(LCD_BL_PIN, PIN_HIGH);
break;
case RTGRAPHIC_CTRL_POWEROFF:
rt_pin_write(LCD_BL_PIN, PIN_LOW);
break;
case RTGRAPHIC_CTRL_GET_INFO:
rt_memcpy(args, &lcd.info, sizeof(lcd.info));
break;
case RTGRAPHIC_CTRL_SET_MODE:
break;
}
return RT_EOK;
}
int rt_hw_lcd_init(void)
{
rt_err_t ret;
lcd.device.type = RT_Device_Class_Graphic;
lcd.device.init = imxrt_lcd_init;
lcd.device.open = RT_NULL;
lcd.device.close = RT_NULL;
lcd.device.read = RT_NULL;
lcd.device.write = RT_NULL;
lcd.device.control = imxrt_lcd_control;
lcd.device.user_data = (void *)&lcd.info;
ret = rt_device_register(&lcd.device, "lcd", RT_DEVICE_FLAG_RDWR);
return ret;
}
INIT_DEVICE_EXPORT(rt_hw_lcd_init);
#endif /* BSP_USING_LCD */
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