【RTT大賽作品連載】AB32VG1開發(fā)板之OLED屏

AB32VG1開發(fā)板外設(shè)資源豐富，此次來分享一下AB32VG1開發(fā)板驅(qū)動OLED屏的具體步驟。板上預(yù)留了IIC接口，可通過杜邦線連接IIC接口的OLED模塊，連接好OLED模塊后進行軟件上的設(shè)置。

打開“RT Thread setting”點擊添加按鈕，搜索框輸入“SSD1306”

組件成功添加，，如下圖所示：

點擊右鍵，選擇詳細配置，軟件包選項卡配置如下：

硬件選項使能IIC接口

然后保存所勾選的配置，這樣成功得將SSD1306模塊所封裝的庫函數(shù)添加進工程中，所在目錄“RT-ThreadStudio\workspace\open_OLED\packages\ssd1306-latest”

加載完成后，可以查看驅(qū)動SSD1306的源代碼

#include 
#include 
#include 

#include 
#include 
#include "ssd1306.h"
#include "ssd1306_tests.h"

void ssd1306_TestBorder()
{
    ssd1306_Fill(Black);

    uint32_t start = rt_tick_get();
    uint32_t end = start;
    uint8_t x = 0;
    uint8_t y = 0;
    do {
        ssd1306_DrawPixel(x, y, Black);

        if((y == 0) && (x < 127))
            x++;
        else if((x == 127) && (y < 63))
            y++;
        else if((y == 63) && (x > 0)) 
            x--;
        else
            y--;

        ssd1306_DrawPixel(x, y, White);
        ssd1306_UpdateScreen();
    
        rt_thread_mdelay(5);
        end = rt_tick_get();
    } while((end - start) < 8000);
   
    rt_thread_mdelay(1000);
}

void ssd1306_TestFonts()
{
    ssd1306_Fill(Black);
    ssd1306_SetCursor(2, 0);
    ssd1306_WriteString("Font 16x26", Font_16x26, White);
    ssd1306_SetCursor(2, 26);
    ssd1306_WriteString("Font 11x18", Font_11x18, White);
    ssd1306_SetCursor(2, 26+18);
    ssd1306_WriteString("Font 7x10", Font_7x10, White);
    ssd1306_SetCursor(2, 26+18+10);
    ssd1306_WriteString("Font 6x8", Font_6x8, White);
    ssd1306_UpdateScreen();
}

void ssd1306_TestFPS()
{
    ssd1306_Fill(White);
   
    uint32_t start = rt_tick_get();
    uint32_t end = start;
    int fps = 0;
    char message[] = "ABCDEFGHIJK";
   
    ssd1306_SetCursor(2,0);
    ssd1306_WriteString("Testing...", Font_11x18, Black);
   
    do {
        ssd1306_SetCursor(2, 18);
        ssd1306_WriteString(message, Font_11x18, Black);
        ssd1306_UpdateScreen();
       
        char ch = message[0];
        memmove(message, message+1, sizeof(message)-2);
        message[sizeof(message)-2] = ch;

        fps++;
        end = rt_tick_get();
    } while((end - start) < 5000);
   
    rt_thread_mdelay(1000);

    char buff[64];
    fps = (float)fps / ((end - start) / 1000.0);
    snprintf(buff, sizeof(buff), "~%d FPS", fps);
   
    ssd1306_Fill(White);
    ssd1306_SetCursor(2, 18);
    ssd1306_WriteString(buff, Font_11x18, Black);
    ssd1306_UpdateScreen();
}

void ssd1306_TestLine()
{
    ssd1306_Line(1,1,SSD1306_WIDTH - 1,SSD1306_HEIGHT - 1,White);
    ssd1306_Line(SSD1306_WIDTH - 1,1,1,SSD1306_HEIGHT - 1,White);
    ssd1306_UpdateScreen();
    return;
}

void ssd1306_TestRectangle()
{
    uint32_t delta;

    for(delta = 0; delta < 5; delta ++) 
    {
        ssd1306_DrawRectangle(1 + (5*delta),1 + (5*delta) ,SSD1306_WIDTH-1 - (5*delta),SSD1306_HEIGHT-1 - (5*delta),White);
    }
    ssd1306_UpdateScreen();
    return;
}

void ssd1306_TestCircle()
{
    uint32_t delta;

    for(delta = 0; delta < 5; delta ++) 
    {
        ssd1306_DrawCircle(20* delta+30, 30, 10, White);
    }
    ssd1306_UpdateScreen();
    return;
}

void ssd1306_TestArc()
{
    ssd1306_DrawArc(30, 30, 30, 20, 270, White);
    ssd1306_UpdateScreen();
    return;
}

void ssd1306_TestPolyline()
{
    SSD1306_VERTEX loc_vertex[] =
    {
        {35,40},
        {40,20},
        {45,28},
        {50,10},
        {45,16},
        {50,10},
        {53,16}
    };

    ssd1306_Polyline(loc_vertex,sizeof(loc_vertex)/sizeof(loc_vertex[0]),White);
    ssd1306_UpdateScreen();
    return;
}

void ssd1306_TestAll()
{
    ssd1306_Init();

    ssd1306_TestFPS();
    rt_thread_mdelay(1000);

    ssd1306_TestBorder();

    ssd1306_TestFonts();
    rt_thread_mdelay(1000);

    ssd1306_Fill(Black);
    ssd1306_TestRectangle();
    ssd1306_TestLine();
    rt_thread_mdelay(1000);

    ssd1306_Fill(Black);
    ssd1306_TestPolyline();
    rt_thread_mdelay(1000);

    ssd1306_Fill(Black);
    ssd1306_TestArc();
    rt_thread_mdelay(1000);

    ssd1306_Fill(Black);
    ssd1306_TestCircle();
    rt_thread_mdelay(1000);
}

#ifdef FINSH_USING_MSH
MSH_CMD_EXPORT(ssd1306_TestAll, test ssd1306 oled driver);
#endif

編譯完成后，使用“Downloader.exe”下載器按照如下圖所示的步驟，將生成的.dcf文件下載進開發(fā)板中

終端中輸入“ssd1306_TestAll”，即可啟動檢測OLED模塊的線程，檢測的效果如下：

此次體驗了RT- Thread Studio的強大便捷之處，支持的軟件包組件更方便了IDE的外設(shè)驅(qū)動，的確不錯。