ardupilot/libraries/AP_HAL_Linux/ConsoleDevice.cpp

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#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <AP_HAL/AP_HAL.h>
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#include "ConsoleDevice.h"
ConsoleDevice::ConsoleDevice()
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{
}
ConsoleDevice::~ConsoleDevice()
{
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close();
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}
bool ConsoleDevice::close()
{
_closed = true;
return true;
}
bool ConsoleDevice::open()
{
_rd_fd = STDIN_FILENO;
_wr_fd = STDOUT_FILENO;
_closed = false;
if (!_set_signal_handlers()) {
close();
return false;
}
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return true;
}
bool ConsoleDevice::_set_signal_handlers(void) const
{
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
return (sigaction(SIGTTIN, &sa, nullptr) == 0);
}
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ssize_t ConsoleDevice::read(uint8_t *buf, uint16_t n)
{
if (_closed) {
return -EAGAIN;
}
return ::read(_rd_fd, buf, n);
}
ssize_t ConsoleDevice::write(const uint8_t *buf, uint16_t n)
{
if (_closed) {
return -EAGAIN;
}
return ::write(_wr_fd, buf, n);
}
void ConsoleDevice::set_blocking(bool blocking)
{
int rd_flags;
int wr_flags;
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rd_flags = fcntl(_rd_fd, F_GETFL, 0);
wr_flags = fcntl(_wr_fd, F_GETFL, 0);
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if (blocking) {
rd_flags = rd_flags & ~O_NONBLOCK;
wr_flags = wr_flags & ~O_NONBLOCK;
} else {
rd_flags = rd_flags | O_NONBLOCK;
wr_flags = wr_flags | O_NONBLOCK;
}
if (fcntl(_rd_fd, F_SETFL, rd_flags) < 0) {
::fprintf(stderr, "Failed to set Console nonblocking %s\n", strerror(errno));
}
if (fcntl(_wr_fd, F_SETFL, wr_flags) < 0) {
::fprintf(stderr, "Failed to set Console nonblocking %s\n",strerror(errno));
}
}
void ConsoleDevice::set_speed(uint32_t baudrate)
{
}