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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "conn_uart.h"
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
static int
parse_baudrate(int baud)
{
switch (baud) {
case 9600:
return B9600;
case 19200:
return B19200;
case 38400:
return B38400;
case 57600:
return B57600;
case 115200:
return B115200;
case 230400:
return B230400;
case 460800:
return B460800;
case 500000:
return B500000;
case 576000:
return B576000;
case 921600:
return B921600;
case 1000000:
return B1000000;
case 1152000:
return B1152000;
case 1500000:
return B1500000;
case 2000000:
return B2000000;
case 2500000:
return B2500000;
case 3000000:
return B3000000;
case 3500000:
return B3500000;
case 4000000:
return B4000000;
default:
return -1;
}
}
int
uart_open(char *device, int baudrate)
{
int uart_fd;
struct termios uart_term;
uart_fd = open(device, O_RDWR | O_NOCTTY);
if (uart_fd < 0)
return -1;
memset(&uart_term, 0, sizeof(uart_term));
uart_term.c_cflag = parse_baudrate(baudrate) | CS8 | CLOCAL | CREAD;
uart_term.c_iflag = IGNPAR;
uart_term.c_oflag = 0;
/* set noncanonical mode */
uart_term.c_lflag = 0;
uart_term.c_cc[VTIME] = 30;
uart_term.c_cc[VMIN] = 1;
tcflush(uart_fd, TCIFLUSH);
if (tcsetattr(uart_fd, TCSANOW, &uart_term) != 0) {
close(uart_fd);
return -1;
}
/* Put the fd in non-blocking mode */
if (fcntl(uart_fd, F_SETFL, fcntl(uart_fd, F_GETFL) | O_NONBLOCK) < 0) {
close(uart_fd);
return -1;
}
return uart_fd;
}
int
uart_send(int fd, const char *data, int size)
{
return write(fd, data, size);
}
int
uart_recv(int fd, char *buffer, int buf_size)
{
return read(fd, buffer, buf_size);
}
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