233 lines
5.8 KiB
C
233 lines
5.8 KiB
C
/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-10-18 Meco Man The first version
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* 2021-12-24 Rb Refresh using dma2d
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*/
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#include <lvgl.h>
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//#define DRV_DEBUG
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#define LOG_TAG "LVGL.port.disp"
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#include <drv_log.h>
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#if LV_USE_NXP_SOC
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#include "fsl_gpio.h"
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#include "fsl_elcdif.h"
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#include "fsl_cache.h"
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#endif
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/*A static or global variable to store the buffers*/
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static lv_disp_draw_buf_t disp_buf;
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static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
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/* Macros for panel. */
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#define LCD_FB_BYTE_PER_PIXEL 2
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#define LCD_POL_FLAGS \
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(kELCDIF_DataEnableActiveHigh | kELCDIF_VsyncActiveLow | kELCDIF_HsyncActiveLow | kELCDIF_DriveDataOnRisingClkEdge)
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#define LCD_LCDIF_DATA_BUS kELCDIF_DataBus16Bit
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/* Back light. */
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#define LCD_BL_GPIO GPIO2
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#define LCD_BL_GPIO_PIN 31
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#define DEMO_FB_ALIGN LV_ATTRIBUTE_MEM_ALIGN_SIZE
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#define DISP_BUF_SIZE (((LCD_WIDTH * LCD_HEIGHT * LCD_FB_BYTE_PER_PIXEL) + DEMO_FB_ALIGN - 1) & ~(DEMO_FB_ALIGN - 1))
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/*******************************************************************************
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* Variables
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******************************************************************************/
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static volatile bool s_framePending;
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static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
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SDK_ALIGN(static uint8_t s_frameBuffer[2][DISP_BUF_SIZE], DEMO_FB_ALIGN);
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static rt_sem_t s_frameSema = RT_NULL;
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static void lcd_fb_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
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{
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rt_sem_take(s_frameSema, RT_WAITING_FOREVER);
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DCACHE_CleanInvalidateByRange((uint32_t)color_p, DISP_BUF_SIZE);
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ELCDIF_SetNextBufferAddr(LCDIF, (uint32_t)color_p);
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s_framePending = true;
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}
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static void DEMO_InitLcdClock(void)
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{
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/*
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* The desired output frame rate is 60Hz. So the pixel clock frequency is:
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* (480 + 41 + 4 + 18) * (272 + 10 + 4 + 2) * 60 = 9.2M.
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* Here set the LCDIF pixel clock to 9.3M.
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*/
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/*
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* Initialize the Video PLL.
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* Video PLL output clock is OSC24M * (loopDivider + (denominator / numerator)) / postDivider = 93MHz.
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*/
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clock_video_pll_config_t config =
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{
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.loopDivider = 31,
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.postDivider = 8,
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.numerator = 0,
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.denominator = 0,
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};
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CLOCK_InitVideoPll(&config);
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/*
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* 000 derive clock from PLL2
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* 001 derive clock from PLL3 PFD3
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* 010 derive clock from PLL5
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* 011 derive clock from PLL2 PFD0
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* 100 derive clock from PLL2 PFD1
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* 101 derive clock from PLL3 PFD1
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*/
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CLOCK_SetMux(kCLOCK_LcdifPreMux, 2);
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CLOCK_SetDiv(kCLOCK_LcdifPreDiv, 4);
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CLOCK_SetDiv(kCLOCK_LcdifDiv, 1);
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}
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static void DEMO_InitLcdBackLight(void)
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{
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const gpio_pin_config_t config =
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{
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kGPIO_DigitalOutput,
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1,
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kGPIO_NoIntmode,
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};
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/* Backlight. */
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GPIO_PinInit(LCD_BL_GPIO, LCD_BL_GPIO_PIN, &config);
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}
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#if LV_USE_GPU_NXP_PXP
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static void DEMO_CleanInvalidateCache(lv_disp_drv_t *disp_drv)
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{
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SCB_CleanInvalidateDCache();
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}
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#endif
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static void DEMO_InitLcd(void)
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{
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/* Initialize the display. */
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const elcdif_rgb_mode_config_t config =
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{
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.panelWidth = LCD_WIDTH,
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.panelHeight = LCD_HEIGHT,
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.hsw = LCD_HSW,
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.hfp = LCD_HFP,
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.hbp = LCD_HBP,
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.vsw = LCD_VSW,
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.vfp = LCD_VFP,
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.vbp = LCD_VBP,
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.polarityFlags = LCD_POL_FLAGS,
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/* lvgl starts render in frame buffer 0, so show frame buffer 1 first. */
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.bufferAddr = (uint32_t)s_frameBuffer[1],
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.pixelFormat = kELCDIF_PixelFormatRGB565,
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.dataBus = LCD_LCDIF_DATA_BUS,
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};
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/* Clear frame buffer. */
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rt_memset((void *)s_frameBuffer, 0, sizeof(s_frameBuffer));
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s_frameSema = rt_sem_create("lvgl_sem", 1, RT_IPC_FLAG_PRIO);
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if (RT_NULL == s_frameSema)
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{
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rt_kprintf("lvgl semaphore create failed\r\n");
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RT_ASSERT(0);
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}
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/* No frame pending. */
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s_framePending = false;
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NVIC_SetPriority(LCDIF_IRQn, 3);
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DEMO_InitLcdClock();
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ELCDIF_RgbModeInit(LCDIF, &config);
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ELCDIF_EnableInterrupts(LCDIF, kELCDIF_CurFrameDoneInterruptEnable);
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NVIC_EnableIRQ(LCDIF_IRQn);
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ELCDIF_RgbModeStart(LCDIF);
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DEMO_InitLcdBackLight();
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}
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void LCDIF_IRQHandler(void)
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{
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rt_interrupt_enter();
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uint32_t intStatus = ELCDIF_GetInterruptStatus(LCDIF);
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ELCDIF_ClearInterruptStatus(LCDIF, intStatus);
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if (s_framePending)
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{
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if (intStatus & kELCDIF_CurFrameDone)
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{
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/* IMPORTANT!!!
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* Inform the graphics library that you are ready with the flushing*/
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lv_disp_flush_ready(&disp_drv);
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s_framePending = false;
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rt_sem_release(s_frameSema);
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}
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}
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rt_interrupt_leave();
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SDK_ISR_EXIT_BARRIER;
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}
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void lv_port_disp_init(void)
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{
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lv_disp_draw_buf_init(&disp_buf, s_frameBuffer[0], s_frameBuffer[1], LCD_WIDTH * LCD_HEIGHT);
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/*-------------------------
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* Initialize your display
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* -----------------------*/
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DEMO_InitLcd();
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/*-----------------------------------
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* Register the display in LittlevGL
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*----------------------------------*/
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lv_disp_drv_init(&disp_drv); /*Basic initialization*/
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/*Set up the functions to access to your display*/
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/*Set the resolution of the display*/
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disp_drv.hor_res = LCD_WIDTH;
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disp_drv.ver_res = LCD_HEIGHT;
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/*Used to copy the buffer's content to the display*/
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disp_drv.flush_cb = lcd_fb_flush;
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#if LV_USE_GPU_NXP_PXP
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disp_drv.clean_dcache_cb = DEMO_CleanInvalidateCache;
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#endif
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/*Set a display buffer*/
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disp_drv.draw_buf = &disp_buf;
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/* Partial refresh */
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disp_drv.full_refresh = 1;
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/*Finally register the driver*/
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lv_disp_drv_register(&disp_drv);
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}
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