卷积函数的FPGA实现（八）IPcore的BRAM尺寸及加入偏置和ReLU

淡淡的烟草味﹌ 2022-04-02 09:10 227阅读 0赞

**背景：**第一次编写的IPcore存在问题，没有加入偏置与ReLU

**目的：**给IPcore加入偏置和ReLU。

# 一、最终BRAM尺寸的确定 #

## 1.1 IBRAM ##

//calculate parameters about IBRAM
    	printf("inWidth = %d, in_ChannelNum = %d \n",inWidth, inChanNum);
    	int input_pixel = inWidth*inChanNum*NUM_IMG_CACHE_LINES;
    	if (input_pixel > Max_input_image_pixels) 
    		Max_input_image_pixels = input_pixel;
    	printf("-----------Max_input_image_pixels = %d-----------\n",Max_input_image_pixels);

输入的图片尺寸的大小，

## 1.2 WBRAM ##

//calculate parameters about WBRAM
    	int out_channelNum=OutChanNum;
    	printf("OutchanelNum = %d , inChannelNum = %d \n",out_channelNum, inChanNum);
    	int max_co_Num_per_PE=(out_channelNum+N_PE-1)/N_PE;
    	printf("max_co_Num_per_PE= %d \n",max_co_Num_per_PE);
    	int max_filters_per_PE=max_co_Num_per_PE*inChanNum;
    	printf("max_filters_per_PE= %d\n \n",max_filters_per_PE);
    	
    	if(max_co_Num_per_PE>MAXCO_PER_PE)MAXCO_PER_PE=max_co_Num_per_PE;
    	if(max_filters_per_PE>MAX_FILTERS_PER_PE)MAX_FILTERS_PER_PE=max_filters_per_PE;
    	printf("-----------%d  %d --------\n",MAXCO_PER_PE,MAX_FILTERS_PER_PE);

## 1.3 OBRAM ##

//calculate parameters about OBRAM
    	printf("\nCo num = %d \n",OutChanNum);
        if(out_channelNum > max_out_channelNum) max_out_channelNum=out_channelNum;
        printf("******** max_out_channelNum = %d  *********\n",max_out_channelNum);

## 1.4  加入BBRAM ##

表示偏移的BRAM，尺寸为最大的输出通道的个数。

float BiasCache::BBRAM\[MAX\_NUM\_CHOUT\];

## 1.4 定义 ##

// ==========================
    // = Architecture Constants =
    // ==========================
    // Number of Image Cache Lines (need 3, use 4 for simplified Addressing HW)
    const int NUM_IMG_CACHE_LINES = 4;
    // Number of Processing Elements
    const int N_PE = 8;
    
    const int DRAM_DEPTH = 5932576;
    
    //IBRAM, OBRAM, WBRAM size (this value need to be changed by network)
    const int MAX_IMAGE_CACHE_SIZE = 8704;
    const int MAX_NUM_CHOUT = 128;
    //const int MAX_CO_PER_PE=8;
    // const int MAX_2D_FILTERS_PER_PE=1024;
    const int MAX_2D_FILTERS_PER_PE= 2048;

//-------------Cache BRAM variable----------------
    float OutputCache::OBRAM[MAX_NUM_CHOUT];
    float ImageCache::IBRAM[MAX_IMAGE_CACHE_SIZE];
    float WeightsCache::WBRAM[N_PE][MAX_2D_FILTERS_PER_PE][9];

# 二、程序之中结构嵌套及 #

未完