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| /******************************************************************************
*
* Copyright (C) 2009 - 2014 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
* (b) that interact with a Xilinx device through a bus or interconnect.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/*
* helloworld.c: simple test application
*
* This application configures UART 16550 to baud rate 9600.
* PS7 UART (Zynq) is not initialized by this application, since
* bootrom/bsp configures it to baud rate 115200
*
* ------------------------------------------------
* | UART TYPE BAUD RATE |
* ------------------------------------------------
* uartns550 9600
* uartlite Configurable only in HW design
* ps7_uart 115200 (configured by bootrom/bsp)
*/
#include <stdio.h>
#include "platform.h"
#include "xil_printf.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "xscugic.h"
#include "xil_exception.h"
#include "xplatform_info.h"
#include "sleep.h"
#define GPIO_DEVICE_ID XPAR_XGPIOPS_0_DEVICE_ID //PS端GPIO器件ID
#define INIC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID //通用中断控制器ID
#define GPIO_INTERRUPT_ID XPAR_XGPIOPS_0_INTR //PS端GPIO中断ID
#define KEY1 9 //KEY1 连接至 MIO9
#define LED1 0 //LED1 连接至 MIO0
static void intr_handler(void *callback_ref);
int init_interrupt(XScuGic *gic_ins_ptr ,XGpioPs *gpio ,u16 GpioIntrId);
XGpioPs Gpiops;
XScuGic intc;
u32 key_flag; //按键中断标志
u32 key_val; //控制LED亮灭
int main()
{
int status;
XGpioPs_Config *ConfigPtr;
print("mio interrupt Test\n\r");
ConfigPtr = XGpioPs_LookupConfig(GPIO_DEVICE_ID);
if (ConfigPtr == NULL){
return XST_FAILURE;
}
//初始化GPIO
XGpioPs_CfgInitialize(&Gpiops ,ConfigPtr ,ConfigPtr->BaseAddr);
//设置KEY引脚方向为输入
XGpioPs_SetDirectionPin(&Gpiops ,KEY1 ,0);
//设置LED引脚方向为输出并使能输出
XGpioPs_SetDirectionPin(&Gpiops ,LED1 ,1);
XGpioPs_SetOutputEnablePin(&Gpiops ,LED1 ,1);
XGpioPs_Write(&Gpiops ,LED1 , 1);
//建立中断
status = init_interrupt(&intc ,&Gpiops ,GPIO_INTERRUPT_ID);
if (status != XST_SUCCESS){
print("Setup interrupt system failed\r\n");
return status;
}
while(1)
{
if(key_flag){ //触发中断
usleep(20000); //延时消抖
if(XGpioPs_ReadPin(&Gpiops,KEY1) == 0){ //低电平按下
key_val = ~key_val;
XGpioPs_WritePin(&Gpiops,LED1,key_val); //反转LED电平
}
key_flag = FALSE;
XGpioPs_IntrClearPin(&Gpiops,KEY1); //清除中断标志
XGpioPs_IntrEnablePin(&Gpiops,KEY1); //再次使能中断
}
}
return XST_SUCCESS;
}
//中断处理函数
static void intr_handler(void *callback_ref)
{
XGpioPs *gpio = (XGpioPs *) callback_ref;
//读取中断标志
if (XGpioPs_IntrGetStatusPin(gpio ,KEY1)){
key_flag = TRUE;
XGpioPs_IntrDisablePin(gpio ,KEY1); //屏蔽按键KEY中断
}
}
//初始化中断系统，使能KEY1按键的下降沿中断
int init_interrupt(XScuGic *gic_ins_ptr ,XGpioPs *gpio ,u16 GpioIntrId)
{
int status;
XScuGic_Config *IntcConfig;
//初始化中断控制器
IntcConfig = XScuGic_LookupConfig(INIC_DEVICE_ID);
if (IntcConfig == NULL){
return XST_FAILURE;
}
status = XScuGic_CfgInitialize(gic_ins_ptr,IntcConfig,IntcConfig->CpuBaseAddress);
if (status != XST_SUCCESS){
return XST_FAILURE;
}
//设置并使能中断
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XScuGic_InterruptHandler,gic_ins_ptr);
Xil_ExceptionEnable();
//设置中断处理函数
status = XScuGic_Connect(gic_ins_ptr,GpioIntrId,
(Xil_ExceptionHandler) intr_handler,(void *) gpio);
if (status != XST_SUCCESS) {
return status;
}
//使能中断类型为来自GPIO的中断
XScuGic_Enable(gic_ins_ptr , GpioIntrId);
//设置中断触发方式为下降沿触发
XGpioPs_SetIntrTypePin(gpio,KEY1,XGPIOPS_IRQ_TYPE_EDGE_FALLING);
//使能中断源
XGpioPs_IntrEnablePin(gpio,KEY1);
return XST_SUCCESS;
}
|
