分享産品試用報告，測試闆卡是基于Xilinx Zynq-7000系列XC7Z010/XC7Z020高性能低功耗處理器設計的異構多核SoC工業級核心闆。

Petalinux制作linux系統1配置

基本配置信息如下：

（1） 配置啟動項

（2） 配置SD卡分區

（3） 首選SD啟動設置

（4） 主機名設定

2文件系統配置

主要包括如下：

（1） gcc編譯支持

（2） python支持

3 設備樹

另一個一個最重要的就是編寫設備樹文件，主要包括LED以及按鍵的設備樹和axi_uart16550設備樹文件的編寫，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>;

};

實驗

啟動界面如下：

Boot

Kernel

登錄

從上述界面可知，linux系統啟動成功，輸入密碼和賬戶名即可。

1查看各項驅動

（1） gpio驅動

（2） uart 16550驅動

從上述信息可知成功啟動了相應驅動。

2 MIO LED實驗

該實驗的LED實驗情況如下：

實驗現象如下：

代碼如下：

#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 export\n");

exit(1);

}

write(export, "909", 4);

close(export);

printf("GPIO controller export successfully\n");

//Modify GPIO controller direction

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

if(direction < 0)

{

printf("Cannot open GPIO controller direction\n");

exit(1);

}

write(direction, "out", 4);

close(direction);

printf("GPIO controller direction changed to outputsuccessfully\n");

// Modify GPIO controller value

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

if(value < 0)

{

printf("Cannot open GPIO controller value\n");

exit(1);

}

//Swap GPIO control value each 1 second

while (1)

{

sleep(1);

write(value,"1", 2);

printf("GPIO controller value changed to 1 successfully\n");

sleep(1);

write(value,"0", 2);

printf("GPIO controller value changed to 0 successfully\n");

}

}

3 axi gpio led實驗

該實驗情況如下：

實驗如下：

代碼如下：

#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 export\n");

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 successfully\n");

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 successfully\n");

}

}

4 uart16550實驗

根據上述信息可知，串口的驅動字符名為ttyS1和ttyS2，因此實驗現象如下：

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