一、前言

D/AVE 2D 是 Renesas 微控制器中的硬件模块，主要用于2D图形加速。

• 硬件加速的2D图形绘制操作
• 支持矩形填充、线条绘制、位图传输等
• 比软件实现快得多的图形渲染速度

参考文档：
RA Flexible Software Package Documentation: D/AVE 2D Port Interface (r_drw)

二、DRW DEMO

1、配置STACKS

用到display 和 D/AVE

相关参数可以参考https://bbs.elecfans.com/jishu_2502530_1_1.html

2、使能SDAM

3、程序

1、hal_entry.c

调用了DRW_entry()

void hal_entry(void)
{
    DRW_entry();
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

初始化了SDRAM

void R_BSP_WarmStart(bsp_warm_start_event_t event)
{
    if (BSP_WARM_START_RESET == event)
    {
#if BSP_FEATURE_FLASH_LP_VERSION != 0

        /* Enable reading from data flash. */
        R_FACI_LP->DFLCTL = 1U;

        /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and
         * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif
    }

    if (BSP_WARM_START_POST_C == event)
    {
        /* C runtime environment and system clocks are setup. */

        /* Configure pins. */
        R_IOPORT_Open (&g_ioport_ctrl, g_ioport.p_cfg);

        #if BSP_CFG_SDRAM_ENABLED

        /* Setup SDRAM and initialize it. Must configure pins first. */
        R_BSP_SdramInit(true);
        #endif
    }

}

2、DRW_entry.c

配置缓存、调用display初始化、drw初始化，调用demo ：display_draw

void DRW_entry(void)
{
    fsp_err_t err = FSP_SUCCESS;
    fsp_pack_version_t version    = {RESET_VALUE};
#if defined(CPKCOR_RA8D1B)
    uint32_t * p_framebuffer = NULL;
#else
    uint8_t * p_framebuffer = NULL;
#endif

    /* Get LCDC configuration */
    g_hz_size = (g_display_cfg.input[ARRAY_INDEX].hsize);
    g_vr_size = (g_display_cfg.input[ARRAY_INDEX].vsize);
    /* Initialize buffer pointers */
    g_buffer_size = (uint32_t) (g_hz_size * g_vr_size * BYTES_PER_PIXEL);
#if defined(CPKCOR_RA8D1B)
    g_p_single_buffer = (uint32_t *) g_display_cfg.input[ARRAY_INDEX].p_base;
#else
    g_p_single_buffer = (uint8_t *) g_display_cfg.input[ARRAY_INDEX].p_base;
#endif
    /* Double buffer for drawing color bands with good quality */
    g_p_double_buffer = g_p_single_buffer + g_buffer_size;

    /* GLCDC init */
    glcdc_init();

    /* Wait for a Vsync event */
    while(!g_vsync_flag);
    g_vsync_flag = RESET_FLAG;

    /* DRW initialization */
    drw_init();

    while(true)
    {
        /* Swap the active framebuffer */
        p_framebuffer = (p_framebuffer == g_p_single_buffer) ? g_p_double_buffer : g_p_single_buffer;

        /* Wait for a Vsync event */
        while(!g_vsync_flag);
        g_vsync_flag = RESET_FLAG;

        /* Now that the framebuffer is ready, update the GLCDC buffer pointer on the next Vsync */
#if defined(CPKCOR_RA8D1B)
        err = R_GLCDC_BufferChange(&g_display_ctrl, (uint8_t*) p_framebuffer, DISPLAY_FRAME_LAYER_1);
#else
        err = R_GLCDC_BufferChange(&g_display_ctrl, p_framebuffer, DISPLAY_FRAME_LAYER_1);
#endif

        /* Draw the new framebuffer now */
        display_draw(p_framebuffer);
    }
 }

display初始化：

static void glcdc_init(void)
{
fsp_err_t err = FSP_SUCCESS;
/* Initialize GLCDC driver */
err = R_GLCDC_Open(&g_display_ctrl, &g_display_cfg);

#if defined(CPKCOR_RA8D1B)
/* Initialize LCD. */
mipi_dsi_push_table(g_lcd_init_focuslcd);
#endif

/* Start GLCDC display output */
err = R_GLCDC_Start(&g_display_ctrl);

}

drw初始化：

static void drw_init(void)
{
/* Open the D2 driver and initialize the hardware */
gp_davey = d2_opendevice(BITFIELD_VALUE);
DRW_err = d2_inithw(gp_davey, BITFIELD_VALUE);

/* set the transparency and the alpha mode */
DRW_err = d2_setalpha(gp_davey, ALPHA_VALUE);

DRW_err = d2_setalphamode(gp_davey, d2_am_constant);
/* Set alphablend mode */
DRW_err = d2_setblendmode(gp_davey, d2_bm_alpha, d2_bm_one_minus_alpha);
}

demo函数：

static void display_draw (uint32_t * framebuffer)
{
    /* DRW operations happens here */
    /*Animation of different figures */
    drw_animation();

    /* set frame buffer properties */
    drw_set(framebuffer);

    /* Set the render color to red */
    DRW_err = d2_setcolor(gp_davey, ARRAY_INDEX, RED_COLOR_VAL);
    error_handler(DRW_err, gp_davey);

    /* Render a circle */
    DRW_err = d2_rendercircle(gp_davey,(d2_point)(g_c_c_x1 << SHIFT_VALUE), (d2_point)(g_c_c_y1 << SHIFT_VALUE), (d2_width)(g_c_r << SHIFT_VALUE), (d2_width)(g_c_w << SHIFT_VALUE));
    error_handler(DRW_err, gp_davey);

    /* Set the render color to green */
    DRW_err = d2_setcolor(gp_davey, ARRAY_INDEX, GREEN_COLOR_VAL);
    error_handler(DRW_err, gp_davey);

    /* Render a triangle */
    DRW_err = d2_rendertri(gp_davey, (d2_point)( g_t_x1 << SHIFT_VALUE),(d2_point)( g_t_y1 << SHIFT_VALUE),(d2_point)( g_t_x2 << SHIFT_VALUE),(d2_point)( g_t_y2 << SHIFT_VALUE),(d2_point)( g_t_x3 << SHIFT_VALUE),(d2_point)( g_t_y3 << SHIFT_VALUE),d2_edge2_shared);
    error_handler(DRW_err, gp_davey);

    /* Set the render color to blue */
    DRW_err = d2_setcolor(gp_davey, ARRAY_INDEX, BLUE_COLOR_VAL);
    error_handler(DRW_err, gp_davey);

    /* Render a box */
    DRW_err = d2_renderbox(gp_davey,(d2_point)(g_b_x1 << SHIFT_VALUE), (d2_point)(g_b_y1 << SHIFT_VALUE), (d2_width)(g_b_l << SHIFT_VALUE), (d2_width)(g_b_w << SHIFT_VALUE));
    error_handler(DRW_err, gp_davey);

    /* Set the render color to yellow */
    DRW_err = d2_setcolor(gp_davey, ARRAY_INDEX, YELLOW_COLOR_VAL);
    error_handler(DRW_err, gp_davey);

    /* Render a line */
    DRW_err = d2_renderline(gp_davey, (d2_point) (g_l_x1 << SHIFT_VALUE), (d2_point) (g_l_y1 << SHIFT_VALUE), (d2_point) (g_l_x2 << SHIFT_VALUE), (d2_point) (g_l_y2 << SHIFT_VALUE),
                            (d2_width) (g_l_w << SHIFT_VALUE), d2_le_exclude_both);
    error_handler(DRW_err, gp_davey);

    /* End the display list, then call d2_start frame to begin execution */
    DRW_err = d2_endframe(gp_davey);
    error_handler(DRW_err, gp_davey);
}

代码：

*附件：drw.rar