/* * 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 "drv_lcd.h" #include "fsl_common.h" #include "fsl_iomuxc.h" #include "fsl_elcdif.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 rt1050_lcd { struct rt_device device; struct rt_device_graphic_info info; }; static struct rt1050_lcd lcd; ALIGN(64) static uint16_t frame_buffer[LCD_HEIGHT][LCD_WIDTH] SECTION("NonCacheable"); static rt_err_t rt1050_lcd_init(rt_device_t device) { RT_ASSERT(device != RT_NULL); rt_memset(frame_buffer, 0x00, sizeof(frame_buffer)); /* DeInit Video PLL. */ CLOCK_DeinitVideoPll(); /* * Initialize the Video PLL. * Video PLL output clock is OSC24M * (loopDivider + (denominator / numerator)) / postDivider = 93MHz. */ clock_video_pll_config_t config = { .loopDivider = 31, .postDivider = 8, .numerator = 0, .denominator = 1, }; CLOCK_InitVideoPll(&config); /* * 000 derive clock from PLL2 * 001 derive clock from PLL3 PFD3 * 010 derive clock from PLL5 * 011 derive clock from PLL2 PFD0 * 100 derive clock from PLL2 PFD1 * 101 derive clock from PLL3 PFD1 */ CLOCK_SetMux(kCLOCK_LcdifPreMux, 2); CLOCK_SetDiv(kCLOCK_LcdifPreDiv, 4); CLOCK_SetDiv(kCLOCK_LcdifDiv, 1); /* GPIO */ CLOCK_EnableClock(kCLOCK_Iomuxc); IOMUXC_SetPinMux(IOMUXC_GPIO_B0_04_LCD_DATA00, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_04_LCD_DATA00, 0x01B0B0U); /* LCD_B3 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_05_LCD_DATA01, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_05_LCD_DATA01, 0x01B0B0U); /* LCD_B4 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_06_LCD_DATA02, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_06_LCD_DATA02, 0x01B0B0U); /* LCD_B5 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_07_LCD_DATA03, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_07_LCD_DATA03, 0x01B0B0U); /* LCD_B6 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_08_LCD_DATA04, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_08_LCD_DATA04, 0x01B0B0U); /* LCD_B7 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_09_LCD_DATA05, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_09_LCD_DATA05, 0x01B0B0U); /* LCD_G2 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_10_LCD_DATA06, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_10_LCD_DATA06, 0x01B0B0U); /* LCD_G3 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_11_LCD_DATA07, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_11_LCD_DATA07, 0x01B0B0U); /* LCD_G4 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_12_LCD_DATA08, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_12_LCD_DATA08, 0x01B0B0U); /* LCD_G5 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_13_LCD_DATA09, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_13_LCD_DATA09, 0x01B0B0U); /* LCD_G6 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_14_LCD_DATA10, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_14_LCD_DATA10, 0x01B0B0U); /* LCD_G7 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_15_LCD_DATA11, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_15_LCD_DATA11, 0x01B0B0U); /* LCD_R3 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B1_00_LCD_DATA12, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_00_LCD_DATA12, 0x01B0B0U); /* LCD_R4 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B1_01_LCD_DATA13, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_01_LCD_DATA13, 0x01B0B0U); /* LCD_R5 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B1_02_LCD_DATA14, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_02_LCD_DATA14, 0x01B0B0U); /* LCD_R6 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B1_03_LCD_DATA15, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_03_LCD_DATA15, 0x01B0B0U); /* LCD_R7 */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_00_LCD_CLK, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_00_LCD_CLK, 0x01B0B0u); /* LCD_CLK */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_02_LCD_HSYNC, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_02_LCD_HSYNC, 0x01B0B0u); /* LCD_HSYNC */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_03_LCD_VSYNC, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_03_LCD_VSYNC, 0x01B0B0u); /* LCD_VSYNC */ IOMUXC_SetPinMux(IOMUXC_GPIO_B0_01_LCD_ENABLE, 0U); IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_01_LCD_ENABLE, 0x01B0B0u); /* LCD_ENABLE */ 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 rt1050_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 = rt1050_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 = rt1050_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);