- UID
- 1029342
- 性别
- 男
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首先还是通过Xilinx Platform Studio创建一个XPS工程
后面选择开发板的型号照旧
再选择自己需要的外设,我选择了RAM、LED、PUSH_BUTTON和UART,注意将PUSH_BUTTON的“使用中断”选项选中
这样工程就创建好了
下面详细介绍下如何修改LED与GPIO的连线为IO线
未修改前我们可以看到连线的详细情况如下(默认为输出线):
首先我们修改mhs文件
将GPIO的输出线改为输入输出线
改为
再修改端口的定义
改为
这时连线就修改完了,结果如图
再修改与主芯片连接的管脚,这时我们修改UCF文件
修改为
这时引脚就修改完了,结果如图
再依次完成左边的发布流程
发布完成后打开SDK,结果如图
再新建一个工程可以看到对应的bsp工程中有IP核的使用参考文档
现在完成我们需要外设完成的功能的编码工作就行了,这里实现了LED的跑马灯和按按钮时LED全灭
源码如下:
/* * led_button.c * * Created on: 2014-9-30 * Author: */#include <stdio.h>#include <math.h>#include "xparameters.h"#include "xgpio.h"#include "xgpio_l.h"#include "xintc.h"XGpio Gpio_LEDS;XGpio Gpio_Buttons;XIntc Intc_Ctrl;#define LED_DELAY 6000000#define LED_NUM 8#define DATA_CHANNEL 1void pushButtonHandle(void *pshButton);int led_button(){ int status; int index = 0; u32 DATAS[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; volatile int Delay; //初始化LED status = XGpio_Initialize(&Gpio_LEDS, XPAR_LEDS_8BITS_DEVICE_ID); if (status != XST_SUCCESS) { return XST_FAILURE; } //led全灭 XGpio_SetDataDirection(&Gpio_LEDS, DATA_CHANNEL, 0x00000000); XGpio_DiscreteWrite(&Gpio_LEDS, DATA_CHANNEL, 0x00); xil_printf("LEDs have been Initialized\r\n"); //初始化按钮 status = XGpio_Initialize(&Gpio_Buttons, XPAR_PUSH_BUTTONS_5BITS_DEVICE_ID); if (status != XST_SUCCESS) { return XST_FAILURE; } status = XIntc_Initialize(&Intc_Ctrl, XPAR_INTC_0_DEVICE_ID); if (status != XST_SUCCESS) { return XST_FAILURE; } status = XIntc_Connect(&Intc_Ctrl, XPAR_INTC_0_GPIO_1_VEC_ID, pushButtonHandle, &Gpio_Buttons); if (status != XST_SUCCESS) { return XST_FAILURE; } XIntc_Enable(&Intc_Ctrl, XPAR_INTC_0_GPIO_1_VEC_ID); XGpio_InterruptEnable(&Gpio_Buttons, XGPIO_IR_CH1_MASK); XGpio_InterruptGlobalEnable(&Gpio_Buttons);// microblaze_register_handler(XIntc_DeviceInterruptHandler, XPAR_INTC_0_DEVICE_ID); microblaze_enable_interrupts(); XIntc_Start(&Intc_Ctrl, XIN_REAL_MODE); xil_printf("Push Buttons have been Initialized\r\n"); while (1) { XGpio_SetDataDirection(&Gpio_LEDS, DATA_CHANNEL, 0x00000000); XGpio_DiscreteWrite(&Gpio_LEDS, DATA_CHANNEL, DATAS[index]); index ++; index = index % LED_NUM; for (Delay = 0; Delay < LED_DELAY; Delay++);// XGpio_SetDataDirection(&Gpio_LEDS, DATA_CHANNEL, 0xFFFFFFFF);// u32 tmp = XGpio_DiscreteRead(&Gpio_LEDS, DATA_CHANNEL);// xil_printf("Read the data:%d\r\n", tmp); } return XST_SUCCESS;}void pushButtonHandle(void *pshButton){ XGpio* PushButton = (XGpio*) pshButton;// u32 buttonData = XGpio_DiscreteRead(PushButton, DATA_CHANNEL);// int buttonIndex = log2(buttonData);// xil_printf("Button[%d] has been pushed!\r\n", buttonIndex); XGpio_InterruptClear(PushButton, 0xff); //使LED全灭 XGpio_SetDataDirection(&Gpio_LEDS, DATA_CHANNEL, 0x00000000); XGpio_DiscreteWrite(&Gpio_LEDS, DATA_CHANNEL, 0x00);} |
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