/* * File : drv_lcd.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006-2013, RT-Thread Development Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rt-thread.org/license/LICENSE * * Change Logs: * Date Author Notes * 2017-10-30 Tanek the first version * 2018-04-05 Liu2guang export LCD config parameters. */ #include #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 #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; ALIGN(64) static uint16_t frame_buffer[LCD_HEIGHT][LCD_WIDTH] RT_SECTION("NonCacheable"); 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 */