TermApp/TestComm/app/src/main/cpp/SpiPort.cpp

#include <termios.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <android/log.h>
#include <string>

#include "SpiPort.h"

SpiPort::SpiPort(const std::string& path) : m_path(path), m_fd(0)
{
}

SpiPort::~SpiPort()
{
    if (m_fd > 0)
    {
        close(m_fd);
    }
}

bool SpiPort::Open()
{
    if(m_fd <= 0) m_fd = open(m_path.c_str(), O_RDWR/*|O_NDELAY|O_NOCTTY*/);
    if(m_fd <= 0 ) {
        int err = errno;
        m_log = "open spi Error errno=" + std::to_string(err);
        __android_log_print(ANDROID_LOG_INFO, "SPi", "open spi Error errno=%d", err);
        return false;
    }
    else __android_log_print(ANDROID_LOG_INFO, "SPi", "open spi Success m_fd=%d",m_fd);

    return true;
}

// write
int SpiPort::Write(unsigned char *buf, int len)
{
    return write(m_fd, buf, len);
}

// read
int SpiPort::Read(unsigned char *buf, int len)
{
    return read(m_fd, buf, len);
}

//close
bool SpiPort::Close()
{
    if(m_fd > 0)
    {
        close(m_fd);
        m_fd = 0;
    }

    return true;
}