Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统

分享产品试用报告,测试板卡是基于Xilinx Zynq-7000系列XC7Z010/XC7Z020高性能低功耗处理器设计的异构多核SoC工业级核心板。

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统

以下为测评内容,欢迎阅读:

Petalinux制作linux系统1配置

基本配置信息如下:

(1) 配置启动项

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


(2) 配置SD卡分区

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


(3) 首选SD启动设置

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


(4) 主机名设定

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


2文件系统配置

主要包括如下:

(1) gcc编译支持

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


(2) python支持

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


3 设备树

另一个一个最重要的就是编写设备树文件,主要包括LED以及按键的设备树和axi_uart16550设备树文件的编写,内容如下:

/include/ "system-conf.dtsi"

/ {

aliases{

ethernet0= &gem0;

serial0= &uart1;

};

gpio-keys{

compatible = "gpio-keys";

#gpio-cells = <2>;

SW0 {

label= "SW0";

#gpio-cells= <2>;

gpios= <&axi_gpio_1 0x0 0x0 0x0>;

linux,code= <108>;

gpio-key,wakeup;

autorepeat;

};

SW1 {

label= "SW1";

#gpio-cells= <2>;

gpios= <&axi_gpio_1 0x1 0x0 0x0>;

linux,code= <108>;

gpio-key,wakeup;

autorepeat;

};

SW2 {

label= "SW2";

#gpio-cells= <2>;

gpios= <&axi_gpio_1 0x2 0x0 0x0>;

linux,code= <108>;

gpio-key,wakeup;

autorepeat;

};

};

gpio-leds{

compatible= "gpio-leds";

#gpio-cells= <2>;

led-ld0{

label= "led-ld0";

#gpio-cells= <2>;

gpios= <&axi_gpio_0 0x0 0 0x0>;

default-state= "on";

linux,default-trigger= "default-on";

};

led-ld1{

label= "led-ld1";

#gpio-cells= <2>;

gpios= <&axi_gpio_0 0x1 0 0x0>;

default-state= "on";

linux,default-trigger= "default-on";

};

led-ld2{

label= "led-ld2";

#gpio-cells= <2>;

gpios= <&axi_gpio_0 0x2 0 0x0>;

default-state= "on";

linux,default-trigger= "default-on";

};

};

};

&axi_uart16550_0 {

status= "okay";

port-number= <1>;

current-speed= <57600>;

xlnx,use-modem-ports= <0x0>;

xlnx,use-user-ports= <0x0>;

};


&axi_uart16550_1 {

status= "okay";

port-number= <1>;

current-speed= <57600>;

xlnx,use-modem-ports= <0x0>;

xlnx,use-user-ports= <0x0>;

};

实验

启动界面如下:

Boot

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


Kernel

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


登录

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


从上述界面可知,linux系统启动成功,输入密码和账户名即可。

1查看各项驱动

(1) gpio驱动

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


(2) uart 16550驱动

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


从上述信息可知成功启动了相应驱动。

2 MIO LED实验

该实验的LED实验情况如下:

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


实验现象如下:

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统

代码如下:

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

int main()

{

int value;

int export;

int direction;


//export GPIO controller

export = open("/sys/class/gpio/export", O_WRONLY);

if(export < 0)

{

printf("Cannot open GPIO controller exportn");

exit(1);

}

write(export, "909", 4);

close(export);

printf("GPIO controller export successfullyn");


//Modify GPIO controller direction

direction = open("/sys/class/gpio/gpio909/direction",O_WRONLY);

if(direction < 0)

{

printf("Cannot open GPIO controller directionn");

exit(1);

}

write(direction, "out", 4);

close(direction);

printf("GPIO controller direction changed to outputsuccessfullyn");


// Modify GPIO controller value

value = open("/sys/class/gpio/gpio909/value", O_RDWR);

if(value < 0)

{

printf("Cannot open GPIO controller valuen");

exit(1);

}


//Swap GPIO control value each 1 second

while (1)

{

sleep(1);

write(value,"1", 2);

printf("GPIO controller value changed to 1 successfullyn");

sleep(1);

write(value,"0", 2);

printf("GPIO controller value changed to 0 successfullyn");

}

}

3 axi gpio led实验

该实验情况如下:

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统


实验如下:

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统

代码如下:

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

int main()

{

int led0;

int led1;

int led2;


//export GPIO controller

led0 = open("/sys/class/leds/led-ld0/brightness", O_WRONLY);

led1 = open("/sys/class/leds/led-ld1/brightness", O_WRONLY);

led2 = open("/sys/class/leds/led-ld2/brightness", O_WRONLY);

if(led0 < 0 | led1 < 0 | led2 < 0)

{

printf("Cannot open GPIO controller exportn");

exit(1);

}

write(led0,"0", 2);

write(led1,"0", 2);

write(led2,"0", 2);

//Swap GPIO control value each 1 second

while (1)

{

sleep(1);

write(led0,"255", 4);

sleep(1);

write(led1,"255", 4);

sleep(1);

write(led2,"255", 4);

printf("GPIO controller value changed to 1 successfullyn");

sleep(1);

write(led0,"0", 2);

sleep(1);

write(led1,"0", 2);

sleep(1);

write(led2,"0", 2);

printf("GPIO controller value changed to 0 successfullyn");

}

}

4 uart16550实验

根据上述信息可知,串口的驱动字符名为ttyS1和ttyS2,因此实验现象如下:

Xilinx XC7Z020双核ARM+FPGA开发板试用合集——创建linux系统

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