本文转载自： XILINX技术社区微信公众号
本篇博文将为您演示如何创建 AXI CDMA Linux 用户空间示例应用。
示例设计将在 Zynq UltraScale+ RFSoC ZCU111 评估板上实现通过 AXI CDMA 把数据从 PS DDR 传输至 AXI BRAM。
适用平台
Vivado 和 PetaLinux 2019.2。
Zynq UltraScale+ RFSoC ZCU111 评估板
启动模式：JTAG，SD
模块框图
Vivado步骤
步骤 1：基于ZCU111 评估版创建一个工程，并根据上图中的模块设计完成相应的模块设计。
步骤 2：按下列设置来配置 AXI CDMA：
步骤 3：成功完成后，选择“验证设计 (Validate design)”以验证设计，并检查地址编辑器。
步骤4：创建整个模块设计的顶层文件并生成比特流。
步骤 5：导出硬件设计以获取 XSA 文件。
PetaLinux步骤
以下步骤用于生成启动镜像和 Linux 用户空间应用。
步骤 1：
使用以下命令和随附内容 (axicdma.c) 创建 AXI CDMA 用户空间应用。
vim axicmda.c
步骤 2:
petalinux-create -t project -n bram --template zynqMP
步骤3：
petalinux-config --v --get-hw-description=<hdf directory>
步骤4：
在 system-user.dtsi 文件中添加以下更改以禁用 CDMA 驱动并保留内存。
/include/ "system-conf.dtsi"
/ {
#address-cells = >2< ;
#size-cells = >2< ;
memory {
device_type = "memory";
reg = < 0x0 0x0 0x0 0x80000000> , < 0x0 0xA0000000 0x0 0x40000>, < 0x00000008 0x00000000 0x0 0x80000000>;
};
reserved-memory {
ranges;
reserved {
reg = <0x0 0xa0000000 0x0 0x40000>;
};
};
};
&axi_bram_ctrl_1 {
status = "disabled";
};
&axi_cdma_0 {
status = "disabled";
};步骤 5：
petalinux-config -c kernel
然后，按如下方式操作：
Kernel hacking --->[ ] Filter access to /dev/mem --> Save & exit
步骤 6：
petalinux-build
步骤 7：
petalinux-package --boot --fsbl images/linux/zynqmp_fsbl.elf --pmufw images/linux/pmufw.elf --fpga images/linux/system.bit --u-boot images/linux/u-boot.elf --force
步骤 8：
将 BOOT.bin 和 image.ub 文件与测试应用二进制文件一起复制到 SD 卡。
步骤 9：
启动评估板，并运行随附的应用 (axicmda.c)。
运行设计
要运行设计，请首先连接到 ZCU111 评估板并从 SD 卡启动镜像，然后运行二进制应用文件。
控制台输出
/dev/mem opened. BRAM Memory mapped at address 0x7fb5339000. PSDDR Memory mapped at address 0x7fb5192000. CDMA Memory mapped at address 0x7fb5336000. Input : value in PSDDR 0 : value in BRAM 1179403647 Input : value in PSDDR 1 : value in BRAM 65794 Input : value in PSDDR 2 : value in BRAM 0 Input : value in PSDDR 3 : value in BRAM 0 Input : value in PSDDR 4 : value in BRAM 11993091 Input : value in PSDDR 5 : value in BRAM 1 Input : value in PSDDR 6 : value in BRAM 13128 Input : value in PSDDR 7 : value in BRAM 0 Input : value in PSDDR 8 : value in BRAM 64 Input : value in PSDDR 9 : value in BRAM 0 Input : value in PSDDR 10 : value in BRAM 44872 Input : value in PSDDR 11 : value in BRAM 0 Input : value in PSDDR 12 : value in BRAM 0 Input : value in PSDDR 13 : value in BRAM 3670080 Input : value in PSDDR 14 : value in BRAM 4194313 Input : value in PSDDR 15 : value in BRAM 1638426 Input : value in PSDDR 16 : value in BRAM 6 Input : value in PSDDR 17 : value in BRAM 4 Input : value in PSDDR 18 : value in BRAM 64 Input : value in PSDDR 19 : value in BRAM 0 Input : value in PSDDR 20 : value in BRAM 64 Input : value in PSDDR 21 : value in BRAM 0 Input : value in PSDDR 22 : value in BRAM 64 Input : value in PSDDR 23 : value in BRAM 0 Input : value in PSDDR 24 : value in BRAM 504 Input : value in PSDDR 25 : value in BRAM 0 Input : value in PSDDR 26 : value in BRAM 504 Input : value in PSDDR 27 : value in BRAM 0 Input : value in PSDDR 28 : value in BRAM 8 Input : value in PSDDR 29 : value in BRAM 0 Input : value in PSDDR 30 : value in BRAM 3 Input : value in PSDDR 31 : value in BRAM 4 Input : value in PSDDR 32 : value in BRAM 568 Input : value in PSDDR 33 : value in BRAM 0 Input : value in PSDDR 34 : value in BRAM 568 Input : value in PSDDR 35 : value in BRAM 0 Input : value in PSDDR 36 : value in BRAM 568 Input : value in PSDDR 37 : value in BRAM 0 Input : value in PSDDR 38 : value in BRAM 27 Input : value in PSDDR 39 : value in BRAM 0 Input : value in PSDDR 40 : value in BRAM 27 Input : value in PSDDR 41 : value in BRAM 0 Input : value in PSDDR 42 : value in BRAM 1 Input : value in PSDDR 43 : value in BRAM 0 Input : value in PSDDR 44 : value in BRAM 1 Input : value in PSDDR 45 : value in BRAM 5 Input : value in PSDDR 46 : value in BRAM 0 Input : value in PSDDR 47 : value in BRAM 0 Input : value in PSDDR 48 : value in BRAM 0 Input : value in PSDDR 49 : value in BRAM 0 Input : value in PSDDR 50 : value in BRAM 0 Input : value in PSDDR 51 : value in BRAM 0 Input : value in PSDDR 52 : value in BRAM 37116 Input : value in PSDDR 53 : value in BRAM 0 Input : value in PSDDR 54 : value in BRAM 37116 Input : value in PSDDR 55 : value in BRAM 0 Input : value in PSDDR 56 : value in BRAM 65536 Input : value in PSDDR 57 : value in BRAM 0 Input : value in PSDDR 58 : value in BRAM 1 Input : value in PSDDR 59 : value in BRAM 6 Input : value in PSDDR 60 : value in BRAM 39544 Input : value in PSDDR 61 : value in BRAM 0 Input : value in PSDDR 62 : value in BRAM 105080 Input : value in PSDDR 63 : value in BRAM 0 Input : value in PSDDR 64 : value in BRAM 105080 Input : value in PSDDR 65 : value in BRAM 0 Input : value in PSDDR 66 : value in BRAM 5072 Input : value in PSDDR 67 : value in BRAM 0 Input : value in PSDDR 68 : value in BRAM 6168 Input : value in PSDDR 69 : value in BRAM 0 Input : value in PSDDR 70 : value in BRAM 65536 Input : value in PSDDR 71 : value in BRAM 0 Input : value in PSDDR 72 : value in BRAM 2 Input : value in PSDDR 73 : value in BRAM 6 Input : value in PSDDR 74 : value in BRAM 39560 Input : value in PSDDR 75 : value in BRAM 0 Input : value in PSDDR 76 : value in BRAM 105096 Input : value in PSDDR 77 : value in BRAM 0 Input : value in PSDDR 78 : value in BRAM 105096 Input : value in PSDDR 79 : value in BRAM 0 Input : value in PSDDR 80 : value in BRAM 512 Input : value in PSDDR 81 : value in BRAM 0 Input : value in PSDDR 82 : value in BRAM 512 Input : value in PSDDR 83 : value in BRAM 0 Input : value in PSDDR 84 : value in BRAM 8 Input : value in PSDDR 85 : value in BRAM 0 Input : value in PSDDR 86 : value in BRAM 4 Input : value in PSDDR 87 : value in BRAM 4 Input : value in PSDDR 88 : value in BRAM 596 Input : value in PSDDR 89 : value in BRAM 0 Input : value in PSDDR 90 : value in BRAM 596 Input : value in PSDDR 91 : value in BRAM 0 Input : value in PSDDR 92 : value in BRAM 596 Input : value in PSDDR 93 : value in BRAM 0 Input : value in PSDDR 94 : value in BRAM 68 Input : value in PSDDR 95 : value in BRAM 0 Input : value in PSDDR 96 : value in BRAM 68 Input : value in PSDDR 97 : value in BRAM 0 Input : value in PSDDR 98 : value in BRAM 4 Input : value in PSDDR 99 : value in BRAM 0 control reg:0x00000000 status reg:0x00000002 all interrupts masked... control reg:0x00005000 status reg:0x00000002 Writing source address Source addr reg:0x04000000 status reg:0x00000002 Writing destination address Dest addr reg:0xa0000000 status reg:0x00000002 Writing transfer length... DMA transfer is completed length reg:0x00000190 status reg:0x00001002 Output : value in PSDDR 0 : value in BRAM 0 Output : value in PSDDR 1 : value in BRAM 1 Output : value in PSDDR 2 : value in BRAM 2 Output : value in PSDDR 3 : value in BRAM 3 Output : value in PSDDR 4 : value in BRAM 4 Output : value in PSDDR 5 : value in BRAM 5 Output : value in PSDDR 6 : value in BRAM 6 Output : value in PSDDR 7 : value in BRAM 7 Output : value in PSDDR 8 : value in BRAM 8 Output : value in PSDDR 9 : value in BRAM 9 Output : value in PSDDR 10 : value in BRAM 10 Output : value in PSDDR 11 : value in BRAM 11 Output : value in PSDDR 12 : value in BRAM 12 Output : value in PSDDR 13 : value in BRAM 13 Output : value in PSDDR 14 : value in BRAM 14 Output : value in PSDDR 15 : value in BRAM 15 Output : value in PSDDR 16 : value in BRAM 16 Output : value in PSDDR 17 : value in BRAM 17 Output : value in PSDDR 18 : value in BRAM 18 Output : value in PSDDR 19 : value in BRAM 19 Output : value in PSDDR 20 : value in BRAM 20 Output : value in PSDDR 21 : value in BRAM 21 Output : value in PSDDR 22 : value in BRAM 22 Output : value in PSDDR 23 : value in BRAM 23 Output : value in PSDDR 24 : value in BRAM 24 Output : value in PSDDR 25 : value in BRAM 25 Output : value in PSDDR 26 : value in BRAM 26 Output : value in PSDDR 27 : value in BRAM 27 Output : value in PSDDR 28 : value in BRAM 28 Output : value in PSDDR 29 : value in BRAM 29 Output : value in PSDDR 30 : value in BRAM 30 Output : value in PSDDR 31 : value in BRAM 31 Output : value in PSDDR 32 : value in BRAM 32 Output : value in PSDDR 33 : value in BRAM 33 Output : value in PSDDR 34 : value in BRAM 34 Output : value in PSDDR 35 : value in BRAM 35 Output : value in PSDDR 36 : value in BRAM 36 Output : value in PSDDR 37 : value in BRAM 37 Output : value in PSDDR 38 : value in BRAM 38 Output : value in PSDDR 39 : value in BRAM 39 Output : value in PSDDR 40 : value in BRAM 40 Output : value in PSDDR 41 : value in BRAM 41 Output : value in PSDDR 42 : value in BRAM 42 Output : value in PSDDR 43 : value in BRAM 43 Output : value in PSDDR 44 : value in BRAM 44 Output : value in PSDDR 45 : value in BRAM 45 Output : value in PSDDR 46 : value in BRAM 46 Output : value in PSDDR 47 : value in BRAM 47 Output : value in PSDDR 48 : value in BRAM 48 Output : value in PSDDR 49 : value in BRAM 49 Output : value in PSDDR 50 : value in BRAM 50 Output : value in PSDDR 51 : value in BRAM 51 Output : value in PSDDR 52 : value in BRAM 52 Output : value in PSDDR 53 : value in BRAM 53 Output : value in PSDDR 54 : value in BRAM 54 Output : value in PSDDR 55 : value in BRAM 55 Output : value in PSDDR 56 : value in BRAM 56 Output : value in PSDDR 57 : value in BRAM 57 Output : value in PSDDR 58 : value in BRAM 58 Output : value in PSDDR 59 : value in BRAM 59 Output : value in PSDDR 60 : value in BRAM 60 Output : value in PSDDR 61 : value in BRAM 61 Output : value in PSDDR 62 : value in BRAM 62 Output : value in PSDDR 63 : value in BRAM 63 Output : value in PSDDR 64 : value in BRAM 64 Output : value in PSDDR 65 : value in BRAM 65 Output : value in PSDDR 66 : value in BRAM 66 Output : value in PSDDR 67 : value in BRAM 67 Output : value in PSDDR 68 : value in BRAM 68 Output : value in PSDDR 69 : value in BRAM 69 Output : value in PSDDR 70 : value in BRAM 70 Output : value in PSDDR 71 : value in BRAM 71 Output : value in PSDDR 72 : value in BRAM 72 Output : value in PSDDR 73 : value in BRAM 73 Output : value in PSDDR 74 : value in BRAM 74 Output : value in PSDDR 75 : value in BRAM 75 Output : value in PSDDR 76 : value in BRAM 76 Output : value in PSDDR 77 : value in BRAM 77 Output : value in PSDDR 78 : value in BRAM 78 Output : value in PSDDR 79 : value in BRAM 79 Output : value in PSDDR 80 : value in BRAM 80 Output : value in PSDDR 81 : value in BRAM 81 Output : value in PSDDR 82 : value in BRAM 82 Output : value in PSDDR 83 : value in BRAM 83 Output : value in PSDDR 84 : value in BRAM 84 Output : value in PSDDR 85 : value in BRAM 85 Output : value in PSDDR 86 : value in BRAM 86 Output : value in PSDDR 87 : value in BRAM 87 Output : value in PSDDR 88 : value in BRAM 88 Output : value in PSDDR 89 : value in BRAM 89 Output : value in PSDDR 90 : value in BRAM 90 Output : value in PSDDR 91 : value in BRAM 91 Output : value in PSDDR 92 : value in BRAM 92 Output : value in PSDDR 93 : value in BRAM 93 Output : value in PSDDR 94 : value in BRAM 94 Output : value in PSDDR 95 : value in BRAM 95 Output : value in PSDDR 96 : value in BRAM 96 Output : value in PSDDR 97 : value in BRAM 97 Output : value in PSDDR 98 : value in BRAM 98 Output : value in PSDDR 99 : value in BRAM 99 Transmitted Data successfully root@cdma_proj:~#
输出截屏
参考资料：
https://china.xilinx.com/support/documentation/ip_documentation/axi_cdma...
https://china.xilinx.com/support/documentation/sw_manuals/xilinx2019_2/u...
