MZ7030FA板子 按键配置为MIO中断无效
按键连的是板子的MIO50引脚。 如图/***************************** Include Files *********************************/
#include "xparameters.h"
#include "xgpiops.h"
#include "xscugic.h"
#include "xil_exception.h"
#include "xplatform_info.h"
#include <xil_printf.h>
#include "sleep.h"
/************************** Constant Definitions *****************************/
//以下常量映射到xparameters.h文件
#define GPIO_DEVICE_ID XPAR_XGPIOPS_0_DEVICE_ID //PS端GPIO器件ID
#define INTC_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
//定义使用到的MIO引脚号
#define KEY50 //KEY 连接到 MIO50
#define LED7 //LED 连接到 MIO7
/************************** Function Prototypes ******************************/
static void intr_handler(void *callback_ref);
int setup_interrupt_system(XScuGic *gic_ins_ptr, XGpioPs *gpio, u16 GpioIntrId);
/**************************Global Variable Definitions ***********************/
XGpioPs gpio; //PS端GPIO驱动实例
XScuGic intc; //通用中断控制器驱动实例
u32 key_press;//KEY按键按下的标志
u32 key_val; //用于控制LED的键值
/************************** Function Definitions *****************************/
int main(void)
{
int status;
XGpioPs_Config *ConfigPtr; //PS 端GPIO配置信息
xil_printf("test 20200921 \r\n");
//根据器件ID查找配置信息
ConfigPtr = XGpioPs_LookupConfig(GPIO_DEVICE_ID);
if (ConfigPtr == NULL) {
return XST_FAILURE;
}
//初始化Gpio driver
XGpioPs_CfgInitialize(&gpio, ConfigPtr, ConfigPtr->BaseAddr);
//设置KEY所连接的MIO引脚的方向为输入
XGpioPs_SetDirectionPin(&gpio, KEY, 0);
//设置LED所连接的MIO引脚的方向为输出并使能输出
XGpioPs_SetDirectionPin(&gpio, LED, 1);
XGpioPs_SetOutputEnablePin(&gpio, LED, 1);
XGpioPs_WritePin(&gpio, LED, 0x0);
//建立中断,出现错误则打印信息并退出
status = setup_interrupt_system(&intc, &gpio, GPIO_INTERRUPT_ID);
if (status != XST_SUCCESS) {
xil_printf("Setup interrupt system failed\r\n");
return XST_FAILURE;
}
//中断触发时，key_press为TURE，延时一段时间后判断按键是否按下，是则反转LED
while (1) {
if (key_press) {
usleep(20000);
if (XGpioPs_ReadPin(&gpio, KEY) == 0) {
key_val = ~key_val;
XGpioPs_WritePin(&gpio, LED, key_val);
}
key_press = FALSE;
XGpioPs_IntrClearPin(&gpio, KEY); //清除按键KEY中断
XGpioPs_IntrEnablePin(&gpio, KEY); //使能按键KEY中断
}
}
return XST_SUCCESS;
}
//中断处理函数
//@param CallBackRef是指向上层回调引用的指针
static void intr_handler(void *callback_ref)
{
XGpioPs *gpio = (XGpioPs *) callback_ref;
xil_printf("intr_handler detected\r\n");
//读取KEY按键引脚的中断状态，判断是否发生中断
if (XGpioPs_IntrGetStatusPin(gpio, KEY)){
key_press = TRUE;
XGpioPs_IntrDisablePin(gpio, KEY); //屏蔽按键KEY中断
}
}
//建立中断系统，使能KEY按键的下降沿中断
//@param GicInstancePtr是一个指向XScuGic驱动实例的指针
//@param gpio是一个指向连接到中断的GPIO组件实例的指针
//@param GpioIntrId是Gpio中断ID
//@return如果成功返回XST_SUCCESS, 否则返回XST_FAILURE
int setup_interrupt_system(XScuGic *gic_ins_ptr, XGpioPs *gpio, u16 GpioIntrId)
{
int status;
XScuGic_Config *IntcConfig; //中断控制器配置信息
//查找中断控制器配置信息并初始化中断控制器驱动
IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
if (NULL == IntcConfig) {
return XST_FAILURE;
}
status = XScuGic_CfgInitialize(gic_ins_ptr, IntcConfig,
IntcConfig->CpuBaseAddress);
if (status != XST_SUCCESS) {
return XST_FAILURE;
}
//设置并使能中断异常
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XScuGic_InterruptHandler, gic_ins_ptr);
Xil_ExceptionEnable();
//为中断设置中断处理函数
status = XScuGic_Connect(gic_ins_ptr, GpioIntrId,
(Xil_ExceptionHandler) intr_handler, (void *) gpio);
if (status != XST_SUCCESS) {
return status;
}
//使能来自于Gpio器件的中断
XScuGic_Enable(gic_ins_ptr, GpioIntrId);
//设置KEY按键的中断类型为下降沿中断
XGpioPs_SetIntrTypePin(gpio, KEY, XGPIOPS_IRQ_TYPE_EDGE_FALLING);
//使能按键KEY中断
XGpioPs_IntrEnablePin(gpio, KEY);
return XST_SUCCESS;
}
xc5407 发表于 2020-9-22 11:04
代码如上
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