155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
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/*
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* File : drv_lcd.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006-2013, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2017-10-30 Tanek the first version
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* 2018-04-05 Liu2guang export LCD config parameters.
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*/
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#include <rtthread.h>
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#ifdef BSP_USING_LCD
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#include "drv_lcd.h"
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#include "fsl_common.h"
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#include "fsl_iomuxc.h"
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#include "fsl_elcdif.h"
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#include "drv_gpio.h"
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#define LOG_TAG "drv.lcd"
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#include <drv_log.h>
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#if !defined(LCD_WIDTH) || !defined(LCD_HEIGHT)
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#error "Please config lcd pixel parameters."
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#endif
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#if !defined(LCD_HFP) || !defined(LCD_HBP) || !defined(LCD_HSW) || \
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!defined(LCD_VFP) || !defined(LCD_VBP) || !defined(LCD_VSW)
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#error "Please config lcd timing parameters."
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#endif
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#if !defined(LCD_BL_PIN) || !defined(LCD_RST_PIN)
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#error "Please config lcd backlight or reset pin."
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#endif
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struct imxrt_lcd
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{
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struct rt_device device;
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struct rt_device_graphic_info info;
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};
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static struct imxrt_lcd lcd;
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ALIGN(64) static uint16_t frame_buffer[LCD_HEIGHT][LCD_WIDTH] SECTION("NonCacheable");
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static rt_err_t imxrt_lcd_init(rt_device_t device)
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{
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RT_ASSERT(device != RT_NULL);
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rt_memset(frame_buffer, 0x00, sizeof(frame_buffer));
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clock_video_pll_config_t pll_config;
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pll_config.loopDivider = 43;
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pll_config.postDivider = 4;
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pll_config.numerator = 0;
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pll_config.denominator = 0;
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CLOCK_InitVideoPll(&pll_config);
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rt_pin_mode(LCD_RST_PIN, PIN_MODE_OUTPUT); /* LCD_RESET */
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rt_pin_write(LCD_RST_PIN, PIN_LOW);
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rt_thread_delay(RT_TICK_PER_SECOND / 100);
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rt_pin_write(LCD_RST_PIN, PIN_HIGH);
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rt_pin_mode (LCD_BL_PIN, PIN_MODE_OUTPUT); /* LCD_BL */
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rt_pin_write(LCD_BL_PIN, PIN_HIGH);
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/* LCD */
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elcdif_rgb_mode_config_t lcd_config;
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lcd_config.hfp = LCD_HFP;
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lcd_config.vfp = LCD_VFP;
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lcd_config.hbp = LCD_HBP;
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lcd_config.vbp = LCD_VBP;
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lcd_config.hsw = LCD_HSW;
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lcd_config.vsw = LCD_VSW;
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lcd_config.polarityFlags = kELCDIF_DataEnableActiveHigh |
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kELCDIF_VsyncActiveHigh |
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kELCDIF_HsyncActiveLow |
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kELCDIF_DriveDataOnRisingClkEdge;
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lcd_config.panelWidth = LCD_WIDTH;
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lcd_config.panelHeight = LCD_HEIGHT;
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lcd_config.pixelFormat = kELCDIF_PixelFormatRGB565;
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lcd_config.dataBus = kELCDIF_DataBus16Bit;
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lcd_config.bufferAddr = (uint32_t)frame_buffer;
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ELCDIF_RgbModeInit (LCDIF, &lcd_config);
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ELCDIF_RgbModeStart(LCDIF);
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/* LCD DEVICE */
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lcd.info.width = LCD_WIDTH;
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lcd.info.height = LCD_HEIGHT;
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lcd.info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565;
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lcd.info.bits_per_pixel = 16;
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lcd.info.framebuffer = (void *)frame_buffer;
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return RT_EOK;
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}
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static rt_err_t imxrt_lcd_control(rt_device_t device, int cmd, void *args)
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{
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switch(cmd)
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{
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case RTGRAPHIC_CTRL_RECT_UPDATE:
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break;
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case RTGRAPHIC_CTRL_POWERON:
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rt_pin_write(LCD_BL_PIN, PIN_HIGH);
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break;
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case RTGRAPHIC_CTRL_POWEROFF:
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rt_pin_write(LCD_BL_PIN, PIN_LOW);
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break;
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case RTGRAPHIC_CTRL_GET_INFO:
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rt_memcpy(args, &lcd.info, sizeof(lcd.info));
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break;
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case RTGRAPHIC_CTRL_SET_MODE:
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break;
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}
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return RT_EOK;
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}
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int rt_hw_lcd_init(void)
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{
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rt_err_t ret;
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lcd.device.type = RT_Device_Class_Graphic;
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lcd.device.init = imxrt_lcd_init;
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lcd.device.open = RT_NULL;
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lcd.device.close = RT_NULL;
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lcd.device.read = RT_NULL;
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lcd.device.write = RT_NULL;
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lcd.device.control = imxrt_lcd_control;
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lcd.device.user_data = (void *)&lcd.info;
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ret = rt_device_register(&lcd.device, "lcd", RT_DEVICE_FLAG_RDWR);
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return ret;
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}
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INIT_DEVICE_EXPORT(rt_hw_lcd_init);
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#endif /* BSP_USING_LCD */
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