rt-thread-official/bsp/stm32/stm32h750-weact-ministm32h7xx/board/port/drv_lcd_spi.c

/*
 * Copyright (c) 2006-2022, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020-08-07     NU-LL        first version
 */

#include <board.h>

#ifdef BSP_USING_LCD_SPI
#include <lcd.h>
#include <lcd_port.h>
#include <string.h>

#define DRV_DEBUG
#define LOG_TAG             "drv.lcd"
#include <drv_log.h>

#define LCD_DEVICE(dev)     (struct drv_lcd_device*)(dev)

struct drv_lcd_device
{
    struct rt_device parent;

    struct rt_device_graphic_info lcd_info;

    struct rt_semaphore lcd_lock;

    /* 0:front_buf is being used 1: back_buf is being used*/
    rt_uint8_t cur_buf;
    rt_uint8_t *front_buf;
    rt_uint8_t *back_buf;
};

struct drv_lcd_device _lcd;

static rt_err_t drv_lcd_init(struct rt_device *device)
{
    struct drv_lcd_device *lcd = LCD_DEVICE(device);
    /* nothing, right now */
    lcd = lcd;
    return RT_EOK;
}

static rt_err_t drv_lcd_control(struct rt_device *device, int cmd, void *args)
{
    struct drv_lcd_device *lcd = LCD_DEVICE(device);

    switch (cmd)
    {
    case RTGRAPHIC_CTRL_RECT_UPDATE:
    {
        LCD_FillRGBRect(0, 0, _lcd.lcd_info.framebuffer, _lcd.lcd_info.width, _lcd.lcd_info.height);
    }
    break;

    case RTGRAPHIC_CTRL_GET_INFO:
    {
        struct rt_device_graphic_info *info = (struct rt_device_graphic_info *)args;

        RT_ASSERT(info != RT_NULL);
        info->pixel_format  = lcd->lcd_info.pixel_format;
        info->bits_per_pixel = 16;
        info->width         = lcd->lcd_info.width;
        info->height        = lcd->lcd_info.height;
        info->framebuffer   = lcd->lcd_info.framebuffer;
    }
    break;
    }

    return RT_EOK;
}

rt_err_t stm32_lcd_init(struct drv_lcd_device *lcd)
{
    rt_err_t result;
    struct rt_spi_device *spi_device;
    struct rt_spi_configuration cfg;


    /* attach the device to spi bus*/
    spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
    RT_ASSERT(spi_device != RT_NULL);
    result = rt_spi_bus_attach_device(spi_device, LCD_SPI_DEV_NAME, LCD_SPI_BUS_NAME, (void *)RT_NULL);
    if (result != RT_EOK)
    {
        LOG_E("%s attach to %s faild, %d\n", LCD_SPI_DEV_NAME, LCD_SPI_BUS_NAME, result);
    }
    RT_ASSERT(result == RT_EOK);

    cfg.data_width = 8;
    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB | RT_SPI_NO_CS | RT_SPI_3WIRE;
    cfg.max_hz = 20 * 1000 *1000;                           /* 20M */
    rt_spi_configure(spi_device, &cfg);

    return result;
}

#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops lcd_ops =
{
    drv_lcd_init,
    RT_NULL,
    RT_NULL,
    RT_NULL,
    RT_NULL,
    drv_lcd_control
};
#endif

int drv_lcd_hw_init(void)
{
    rt_err_t result = RT_EOK;
    struct rt_device *device = &_lcd.parent;

    /* memset _lcd to zero */
    memset(&_lcd, 0x00, sizeof(_lcd));

    /* init lcd_lock semaphore */
    result = rt_sem_init(&_lcd.lcd_lock, "lcd_lock", 0, RT_IPC_FLAG_FIFO);
    if (result != RT_EOK)
    {
        LOG_E("init semaphore failed!\n");
        result = -RT_ENOMEM;
        goto __exit;
    }

    /* config LCD dev info */
    _lcd.lcd_info.height = LCD_HEIGHT;
    _lcd.lcd_info.width = LCD_WIDTH;
    _lcd.lcd_info.bits_per_pixel = LCD_BITS_PER_PIXEL;
    _lcd.lcd_info.pixel_format = LCD_PIXEL_FORMAT;

    /* malloc memory for Triple Buffering */
    _lcd.lcd_info.framebuffer = rt_malloc(LCD_BUF_SIZE);
    _lcd.back_buf = rt_malloc(LCD_BUF_SIZE);
    _lcd.front_buf = rt_malloc(LCD_BUF_SIZE);
    if (_lcd.lcd_info.framebuffer == RT_NULL || _lcd.back_buf == RT_NULL || _lcd.front_buf == RT_NULL)
    {
        LOG_E("init frame buffer failed!\n");
        result = -RT_ENOMEM;
        goto __exit;
    }

    /* memset buff to 0xFF */
    memset(_lcd.lcd_info.framebuffer, 0xFF, LCD_BUF_SIZE);
    memset(_lcd.back_buf, 0xFF, LCD_BUF_SIZE);
    memset(_lcd.front_buf, 0xFF, LCD_BUF_SIZE);

    device->type    = RT_Device_Class_Graphic;
#ifdef RT_USING_DEVICE_OPS
    device->ops     = &lcd_ops;
#else
    device->init    = drv_lcd_init;
    device->control = drv_lcd_control;
#endif

    /* register lcd device */
    rt_device_register(device, "lcd", RT_DEVICE_FLAG_RDWR);

    /* init stm32 LTDC */
    if (stm32_lcd_init(&_lcd) != RT_EOK)
    {
        result = -RT_ERROR;
        goto __exit;
    }
    else
    {
        LCD_SetBrightness(MAX_BRIGHTNESS);
    }

__exit:
    if (result != RT_EOK)
    {
        rt_sem_delete(&_lcd.lcd_lock);

        if (_lcd.lcd_info.framebuffer)
        {
            rt_free(_lcd.lcd_info.framebuffer);
        }

        if (_lcd.back_buf)
        {
            rt_free(_lcd.back_buf);
        }

        if (_lcd.front_buf)
        {
            rt_free(_lcd.front_buf);
        }
    }
    return result;
}
INIT_DEVICE_EXPORT(drv_lcd_hw_init);

#ifdef DRV_DEBUG
#ifdef FINSH_USING_MSH
int lcd_test()
{
    struct drv_lcd_device *lcd;
    lcd = (struct drv_lcd_device *)rt_device_find("lcd");

    while (1)
    {
        /* red */
        for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
        {
            lcd->lcd_info.framebuffer[2 * i] = 0x00;
            lcd->lcd_info.framebuffer[2 * i + 1] = 0xF8;
        }
        lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
        rt_thread_mdelay(1000);
        /* green */
        for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
        {
            lcd->lcd_info.framebuffer[2 * i] = 0xE0;
            lcd->lcd_info.framebuffer[2 * i + 1] = 0x07;
        }
        lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
        rt_thread_mdelay(1000);
        /* blue */
        for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
        {
            lcd->lcd_info.framebuffer[2 * i] = 0x1F;
            lcd->lcd_info.framebuffer[2 * i + 1] = 0x00;
        }
        lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
        rt_thread_mdelay(1000);
    }
}
MSH_CMD_EXPORT(lcd_test, lcd_test);
#endif /* FINSH_USING_MSH */
#endif /* DRV_DEBUG */
#endif /* BSP_USING_LCD */