hisi读取cpu温度并打印

gpio_01

于 2023-07-08 10:57:10 发布

阅读量602

点赞数 1

分类专栏： linux 文章标签：音视频

本文链接：https://blog.csdn.net/gpio_01/article/details/131609412

版权

linux 专栏收录该内容

26 篇文章

订阅专栏

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <string.h>
#include <sstream>
#include <iostream>
 
using namespace std;
 
static int dev_fd;
#define TEMP_ADDR 0x120300BC
int String2int(char *strIn)
{
	int outDat = -1;
	if (strIn != NULL)
	{
		string str1 = strIn;
		stringstream ss;
		ss << str1;
		ss >> outDat;
	}
	return outDat;
}
int main(int argc, char **argv)
{
	dev_fd = open("/dev/mem", O_RDWR | O_NDELAY);
	if (dev_fd < 0)
	{
		printf("open(/dev/mem) failed.");
		return 0;
	}

	long regAddr=TEMP_ADDR;
	long regVal = 0x00;
	long baseAddr = regAddr&0xFFFFF000,offsetAddr= regAddr&0x00000FFF;
	printf("input data::0x%08x--0x%08x\n", regAddr, regVal);
    unsigned char *map_base=(unsigned char * )mmap(NULL, offsetAddr+1, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, baseAddr);
	if (map_base == MAP_FAILED)
	{
		if (dev_fd)
			close(dev_fd);
		return -1;
	}
	printf("reg data::0x%08x--0x%08x\n", regAddr, *(volatile unsigned int *)(map_base + offsetAddr));
	while(1)
	{
		usleep(1000000);
		double temperature = ((*(volatile unsigned int *)(map_base + offsetAddr) & 0x000003FF) - 116) / 806.0 * 165 - 40;
		printf("temperature:%lf\n",temperature);
	}
    if(dev_fd)
        close(dev_fd);
 
    munmap(map_base, offsetAddr+1);//解除映射关系
 
    return 0;
}