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54 lines
1.2 KiB
54 lines
1.2 KiB
6 months ago
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/******************************************************************
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Copyright © Deng Zhimao Co., Ltd. 1990-2030. All rights reserved.
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* @projectName aflex
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* @brief dac.cpp
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* @author Deng Zhimao
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* @email 1252699831@qq.com
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* @date 2020-07-31
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*******************************************************************/
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#include "dac.h"
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <QDebug>
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Dac::Dac(QObject *parent) : QObject (parent)
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{
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#if __arm__
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system("echo 0 > /sys/devices/platform/soc/40017000.dac/40017000.dac:dac@1/iio:device1/out_voltage1_powerdown");
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#endif
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}
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void Dac::setDac(QString dac)
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{
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char const *filename = "/sys/devices/platform/soc/40017000.dac/40017000.dac:dac@1/iio:device1/out_voltage1_raw";
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int err = 0;
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int fd;
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QByteArray ba;
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ba = dac.toLatin1();
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char *buf = ba.data();
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fd = open(filename, O_RDWR);
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if(fd < 0){
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close(fd);
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qDebug()<<"open file error!"<<endl;
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return;
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}
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err = write(fd, buf, sizeof(buf));
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if (err < 0){
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close(fd);
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qDebug()<<"read data error!"<<endl;
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return;
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}
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close(fd);
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}
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Dac::~Dac()
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{
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}
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