SoC-按键控制led

前言

一、原理图

二、工程代码

1.hps_0.h

#ifndef _ALTERA_HPS_0_H_
#define _ALTERA_HPS_0_H_

/*
 * This file was automatically generated by the swinfo2header utility.
 * 
 * Created from SOPC Builder system 'soc_system' in
 * file './soc_system.sopcinfo'.
 */

/*
 * This file contains macros for module 'hps_0' and devices
 * connected to the following masters:
 *   h2f_axi_master
 *   h2f_lw_axi_master
 * 
 * Do not include this header file and another header file created for a
 * different module or master group at the same time.
 * Doing so may result in duplicate macro names.
 * Instead, use the system header file which has macros with unique names.
 */

/*
 * Macros for device 'led_pio', class 'altera_avalon_pio'
 * The macros are prefixed with 'LED_PIO_'.
 * The prefix is the slave descriptor.
 */
#define LED_PIO_COMPONENT_TYPE altera_avalon_pio
#define LED_PIO_COMPONENT_NAME led_pio
#define LED_PIO_BASE 0x0
#define LED_PIO_SPAN 16
#define LED_PIO_END 0xf
#define LED_PIO_BIT_CLEARING_EDGE_REGISTER 0
#define LED_PIO_BIT_MODIFYING_OUTPUT_REGISTER 0
#define LED_PIO_CAPTURE 0
#define LED_PIO_DATA_WIDTH 4
#define LED_PIO_DO_TEST_BENCH_WIRING 0
#define LED_PIO_DRIVEN_SIM_VALUE 0
#define LED_PIO_EDGE_TYPE NONE
#define LED_PIO_FREQ 50000000
#define LED_PIO_HAS_IN 0
#define LED_PIO_HAS_OUT 1
#define LED_PIO_HAS_TRI 0
#define LED_PIO_IRQ_TYPE NONE
#define LED_PIO_RESET_VALUE 0

/*
 * Macros for device 'key_pio', class 'altera_avalon_pio'
 * The macros are prefixed with 'KEY_PIO_'.
 * The prefix is the slave descriptor.
 */
#define KEY_PIO_COMPONENT_TYPE altera_avalon_pio
#define KEY_PIO_COMPONENT_NAME key_pio
#define KEY_PIO_BASE 0x10
#define KEY_PIO_SPAN 16
#define KEY_PIO_END 0x1f
#define KEY_PIO_BIT_CLEARING_EDGE_REGISTER 0
#define KEY_PIO_BIT_MODIFYING_OUTPUT_REGISTER 0
#define KEY_PIO_CAPTURE 0
#define KEY_PIO_DATA_WIDTH 2
#define KEY_PIO_DO_TEST_BENCH_WIRING 0
#define KEY_PIO_DRIVEN_SIM_VALUE 0
#define KEY_PIO_EDGE_TYPE NONE
#define KEY_PIO_FREQ 50000000
#define KEY_PIO_HAS_IN 1
#define KEY_PIO_HAS_OUT 0
#define KEY_PIO_HAS_TRI 0
#define KEY_PIO_IRQ_TYPE NONE
#define KEY_PIO_RESET_VALUE 0

/*
 * Macros for device 'sysid_qsys', class 'altera_avalon_sysid_qsys'
 * The macros are prefixed with 'SYSID_QSYS_'.
 * The prefix is the slave descriptor.
 */
#define SYSID_QSYS_COMPONENT_TYPE altera_avalon_sysid_qsys
#define SYSID_QSYS_COMPONENT_NAME sysid_qsys
#define SYSID_QSYS_BASE 0x20
#define SYSID_QSYS_SPAN 8
#define SYSID_QSYS_END 0x27
#define SYSID_QSYS_ID 2899645186
#define SYSID_QSYS_TIMESTAMP 1653036750


#endif /* _ALTERA_HPS_0_H_ */

2.main.c

/*
 * main.c
 *
 *  Created on: 2022年5月20日
 *      Author: stark-lin
 */
//gcc标准头文件
#include //标准输入输出
#include //系统调用
#include //是unix标准中通用的头文件, open，fcntl，shutdown，unlink，fclose
#include //mmap所在头文件

//HPS厂家提供的底层定义的头文件
#define soc_cv_av//开发平台Cyclone V系列

#include "hwlib.h"
#include "socal/socal.h"
#include "socal/hps.h"

//与具体的HPS，看自己的设计，应用系统相关的硬件描述头文件
#include "hps_0.h"

#define HW_RGES_BASE (ALT_STM_OFST)//HPS外设地址段基地址
#define HW_RGES_SPAN (0x04000000)//HPS外设地址空间64MB
#define HW_RGES_MASK (HW_RGES_SPAN - 1)//HPS外设地址掩码

static volatile unsigned long *led_pio_base = NULL;//led地址指针，volatile避免优化
static volatile unsigned long *key_pio_base = NULL;//按键地址指针
int fpga_init(int *virtual_base){
	int fd;
	void *per_virtual_base;
	//打开mmu
	fd = open("/dev/mem", (O_RDWR | O_SYNC));
	if(fd == -1){
		printf("ERROR: open is failed\n");
		exit(0);
	}
	//外设地址映射到用户空间，mmap()
	per_virtual_base = mmap(NULL, HW_RGES_SPAN, (PROT_READ | PROT_WRITE), MAP_SHARED,
			fd, HW_RGES_BASE);
	if(per_virtual_base == MAP_SHARED){
		printf("ERROR: mmap is failed\n");
		close(fd);
	}
	//外设地址 = 虚拟地址+外设偏移地址（mm_bridge + 桥上偏移地址）
	led_pio_base = per_virtual_base + ((unsigned long)(ALT_LWFPGASLVS_OFST + LED_PIO_BASE) & (unsigned long)(HW_RGES_MASK));
	key_pio_base = per_virtual_base + ((unsigned long)(ALT_LWFPGASLVS_OFST + KEY_PIO_BASE) & (unsigned long)(HW_RGES_MASK));
	*virtual_base = per_virtual_base;
	return fd;
}

int main(){
	int virtual_base;
	int fd;
	fd = fpga_init(&virtual_base);
	//操作外设
	while(1){
//		*(led_pio_base + 0) = ~(*(key_pio_base + 0)) & 0x03;
		if(*(key_pio_base + 0) == 0x0)
		{
			*(led_pio_base + 0) = 0x0f;
		}
		else
		{
			*(led_pio_base + 0) = 0x00;
		}
	}
	if(munmap(virtual_base, HW_RGES_SPAN) == -1){
		printf("ERROR: munmap is failed\n");
		close(fd);
	}
	//关闭mmu
	close(fd);
	return 0;
}

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总结

SoC