ZYNQ学习笔记——12_ps_pl_bram实验

最新推荐文章于 2025-04-26 19:38:35 发布

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最新推荐文章于 2025-04-26 19:38:35 发布

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分类专栏： ZYNQ学习笔记文章标签：笔记嵌入式硬件 arm

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该文描述了一个使用PYNQ-Z2开发板进行PS-PL通信的实验，通过串口接收数据写入BRAM，然后从BRAM中读出并打印，同时PL读取BRAM数据进行ILA观察，确保数据一致性。代码示例展示了如何配置IP核和进行BRAM读写操作。

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12_ps_pl_bram实验

PS将串口接收到的数据写入BRAM，然后从BRAM中读出数据，并通过串口打印出来；与此同时，PL从BRAM中同样读出数据，并通过ILA来观察读出的数据与串口打印的数据是否一致

使用 PYNQ-Z2开发板

硬件配置、IP核设计参考正点原子资料和视频

代码

#include "xil_printf.h"
#include "stdio.h"
#include "xbram_hw.h"
#include "pl_bram_rd.h"

#define PL_BRAM_START			PL_BRAM_RD_S00_AXI_SLV_REG0_OFFSET	//RAM读开始寄存器地址
#define PL_BRAM_START_ADDR		PL_BRAM_RD_S00_AXI_SLV_REG1_OFFSET	//RAM起始寄存器地址
#define PL_BRAM_LEN				PL_BRAM_RD_S00_AXI_SLV_REG2_OFFSET	//PL读 RAM的深度
#define	PL_BRAM_BASE			XPAR_PL_BRAM_RD_0_S00_AXI_BASEADDR	//PL_RAM_RD基地址

#define START_ADDR			0	//RAM起始地址范围:0~1023
#define BRAM_DATA_BYTE		4	//BRAM数据字节个数

char ch_data[1024];		//写入BRAM的字符数组
int  ch_data_len;		//写入BRAM的字符个数

int main()
{
	while(1)
	{
		int i = 0;
		int wr_cnt = 0;
		int read_data = 0;

		printf("Please input data to read and write Bram !\n");
		scanf("%s",ch_data);			//用户输入字符串
		ch_data_len = strlen(ch_data);	//计算字符串的长度

		//将字符串写入BRAM，每次循环向 BRAM中写入 1 个字符
		for(i = START_ADDR*BRAM_DATA_BYTE; i<(START_ADDR + ch_data_len)*BRAM_DATA_BYTE; i+=BRAM_DATA_BYTE)
		{
			XBram_WriteReg(XPAR_BRAM_0_BASEADDR,i,ch_data[wr_cnt]);
			wr_cnt++;
		}
		//配置PL_BRAM_RD起始地址
		PL_BRAM_RD_mWriteReg(PL_BRAM_BASE,PL_BRAM_START_ADDR,START_ADDR*BRAM_DATA_BYTE);
		//配置PL_BRAM_RD长度
		PL_BRAM_RD_mWriteReg(PL_BRAM_BASE,PL_BRAM_LEN,ch_data_len*BRAM_DATA_BYTE);
		//配置PL_BRAM_RD开始读信号,产生一个上升沿
		PL_BRAM_RD_mWriteReg(PL_BRAM_BASE,PL_BRAM_START,1);
		PL_BRAM_RD_mWriteReg(PL_BRAM_BASE,PL_BRAM_START,0);

		//从 BRAM 中读出数据，循环从 BRAM 中读出数据
		for(i = START_ADDR*BRAM_DATA_BYTE; i<(START_ADDR + ch_data_len)*BRAM_DATA_BYTE; i+=BRAM_DATA_BYTE)
		{
			read_data = XBram_ReadReg(XPAR_BRAM_0_BASEADDR,i);
			printf("BRAM address is %d\t,Read data is %c\n",i/BRAM_DATA_BYTE,read_data);
		}

	}

}

串口

Please input data to read and write Bram !
BRAM address is 0	,Read data is 2
BRAM address is 1	,Read data is 0
BRAM address is 2	,Read data is 2
BRAM address is 3	,Read data is 3
BRAM address is 4	,Read data is /
BRAM address is 5	,Read data is 0
BRAM address is 6	,Read data is 7
BRAM address is 7	,Read data is /
BRAM address is 8	,Read data is 1
BRAM address is 9	,Read data is 9
Please input data to read and write Bram !