d0acc9a97d9e001d14fdda4a5e9541d7

NIOSII的液晶显示ip 核

//BitBlt.c

#include "system.h"
//#include "altera_avalon_pio_regs.h"
#include "alt_types.h"
#include <sys/alt_cache.h>
#include "anywhere_avalon_lcd_regs.h"
#include "anywhere_avalon_bitblt_regs.h"

#define TEST_TIMES    4000

int main (void) __attribute__ ((weak, alias ("alt_main")));

//初始化LCD子程序
//这里参考了第七章的设计程序
void init_LCD(alt_u32 framebuffer)
{
  alt_u32 nBGOffset;
  alt_u32 nFG1Offset;
  alt_u16 nBGWidth;
  alt_u16 nBGHeight;
  alt_u16 nFG1Width;
  alt_u16 nFG1Height;
  alt_u16 nFG1PosX;
  alt_u16 nFG1PosY;
  alt_u8  nFG1Alpha;
  alt_u16 nFG1TransColor;
  alt_16 nStepX;
  alt_16 nStepY;

  nBGOffset=framebuffer;
  nBGWidth=640;
  nBGHeight=480;
  nFG1Offset=nBGOffset+nBGWidth*nBGHeight*2;
  nFG1Width=80;
  nFG1Height=80;
  nFG1PosX=100;
  nFG1PosY=100;
  nFG1Alpha=128;
  nFG1TransColor=0x1234;
  nStepX=2;
  nStepY=2;
  
  //initialize LCD Controller
  //Enable 2 layers
  IOWR_ANYWHERE_AVALON_LCD_LAYER_EN(CONTROLLER_BASE,0x03);
  //Set read mode
  IOWR_ANYWHERE_AVALON_LCD_READ_MODE(CONTROLLER_BASE,0x03);
  //Enalbe transparency
  IOWR_ANYWHERE_AVALON_LCD_TRANS_EN(CONTROLLER_BASE,0x02);
  //Set layer start address
  IOWR_ANYWHERE_AVALON_LCD_BG_STARTADDR(CONTROLLER_BASE,nBGOffset);
  IOWR_ANYWHERE_AVALON_LCD_FG1_STARTADDR(CONTROLLER_BASE,nFG1Offset);
  //Set foreground layer 1
  IOWR_ANYWHERE_AVALON_LCD_FG1_WIDTH(CONTROLLER_BASE,nFG1Width);
  IOWR_ANYWHERE_AVALON_LCD_FG1_HEIGHT(CONTROLLER_BASE,nFG1Height);
  IOWR_ANYWHERE_AVALON_LCD_FG1_X(CONTROLLER_BASE,nFG1PosX);
  IOWR_ANYWHERE_AVALON_LCD_FG1_Y(CONTROLLER_BASE,nFG1PosY);
  IOWR_ANYWHERE_AVALON_LCD_FG1_ALPHA(CONTROLLER_BASE,nFG1Alpha);
  IOWR_ANYWHERE_AVALON_LCD_FG1_TRANSCOLOR(CONTROLLER_BASE,nFG1TransColor);
  //Enable LCD Controller
  IOWR_ANYWHERE_AVALON_LCD_CTRL(CONTROLLER_BASE,0x01);
}

//纯软件的随机块填充子程序
void solid_fill(alt_u32 framebuffer)
{
  alt_u32 framebuffer_offset;   
  framebuffer_offset = framebuffer;
  
  alt_u32 data_offset;
  alt_u32 x_pos;
  alt_u32 y_pos;
  alt_u32 width;
  alt_u32 height;
  alt_u16 color;
  
  int i,j;
  for(i = 0; i < TEST_TIMES; i++ )
  {
    color = rand();
    x_pos = rand() % 640;
    y_pos = rand() % 480;
    width = (rand() % 640) % (640 - x_pos);
    height = (rand() % 480) % (480 - y_pos);
  
    data_offset = framebuffer_offset;
    data_offset += (x_pos + y_pos * 640) * 2;
    
    for(j = 0; j < height; j++)
    {
      memset(data_offset, color, width);
      data_offset += 640 * 2; 
    }
    alt_dcache_flush_all();
   }
}

//BitBlt IP模块的随机块填充子程序
void solid_fill_with_HA(alt_u32 framebuffer)
{
  alt_u32 framebuffer_offset;   
  framebuffer_offset = framebuffer;
  alt_u32 data_offset;
  alt_u32 x_pos;
  alt_u32 y_pos;
  alt_u32 width;
  alt_u32 height;
  
  alt_u16 color;
  int i,j;
  for(i = 0; i < TEST_TIMES; i++ )
  {
    color = rand();
    x_pos = rand() % 640;
    y_pos = rand() % 480;
    width = (rand() % 640) % (640 - x_pos);
    height = (rand() % 480) % (480 - y_pos);
  
    data_offset = framebuffer_offset;
    data_offset += (x_pos + y_pos * 640) * 2;
       IOWR_ANYWHERE_AVALON_BITBLT_DEST_START_ADR(ANYWHERE_AVALON_BITBLT_0_BASE,data_offset); //设置BitBLT的目的开始地址
    IOWR_ANYWHERE_AVALON_BITBLT_DEST_MEM_OFFSET(ANYWHERE_AVALON_BITBLT_0_BASE,640); //设置BitBLT的目的偏移量
    IOWR_ANYWHERE_AVALON_BITBLT_WIDTH(ANYWHERE_AVALON_BITBLT_0_BASE,width); //设置BitBLT的块宽度
    IOWR_ANYWHERE_AVALON_BITBLT_HEIGHT(ANYWHERE_AVALON_BITBLT_0_BASE,height); //设置BitBLT的块高度
    IOWR_ANYWHERE_AVALON_BITBLT_FOREGROUND(ANYWHERE_AVALON_BITBLT_0_BASE,color); //设置BitBLT的块的颜色（前景层）
    
IOWR_ANYWHERE_AVALON_BITBLT_CMD(ANYWHERE_AVALON_BITBLT_0_BASE,0x03); //向BitBLT IP发送写命令
  }
}

//延时函数
int delay(int time)
{
    volatile int i;
    i = 0;
    while (i<time)
    {
      i++;
    }
  return(0);
}

//main函数
int alt_main (void)
{
  alt_u8 led = 0x2;
  alt_u8 dir = 0;
  
  alt_u32 framebuffer_offset;   
  framebuffer_offset = EXT_SSRAM_BASE;
  
  init_LCD(framebuffer_offset);
  
  while (1) 
  {
    solid_fill(framebuffer_offset);
    delay(10000000);
    solid_fill_with_HA(framebuffer_offset);
    delay(10000000);
  }
  return 0;
}