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| /*
| * Licensed to the Apache Software Foundation (ASF) under one
| * or more contributor license agreements. See the NOTICE file
| * distributed with this work for additional information
| * regarding copyright ownership. The ASF licenses this file
| * to you under the Apache License, Version 2.0 (the
| * "License"); you may not use this file except in compliance
| * with the License. You may obtain a copy of the License at
| *
| * http://www.apache.org/licenses/LICENSE-2.0
| *
| * Unless required by applicable law or agreed to in writing,
| * software distributed under the License is distributed on an
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
| * KIND, either express or implied. See the License for the
| * specific language governing permissions and limitations
| * under the License.
| */
|
| #include <assert.h>
| #include <stdio.h>
| #include <string.h>
| #include <errno.h>
| #include <inttypes.h>
| #include <termios.h>
|
| /* B0 defined in bits/termios.h collides with nrfx/mdk/nrf52.h */
| #undef B0
|
| #include "os/mynewt.h"
| #include "native_uart_cfg_priv.h"
|
| /* uint64 is used here to accommodate speed_t, whatever that is. */
| static const uint64_t uart_baud_table[][2] = {
| #ifdef B50
| { 50, B50 },
| #endif
| #ifdef B75
| { 75, B75 },
| #endif
| #ifdef B110
| { 110, B110 },
| #endif
| #ifdef B134
| { 134, B134 },
| #endif
| #ifdef B150
| { 150, B150 },
| #endif
| #ifdef B200
| { 200, B200 },
| #endif
| #ifdef B300
| { 300, B300 },
| #endif
| #ifdef B600
| { 600, B600 },
| #endif
| #ifdef B1200
| { 1200, B1200 },
| #endif
| #ifdef B1800
| { 1800, B1800 },
| #endif
| #ifdef B2400
| { 2400, B2400 },
| #endif
| #ifdef B4800
| { 4800, B4800 },
| #endif
| #ifdef B9600
| { 9600, B9600 },
| #endif
| #ifdef B19200
| { 19200, B19200 },
| #endif
| #ifdef B38400
| { 38400, B38400 },
| #endif
| #ifdef B57600
| { 57600, B57600 },
| #endif
| #ifdef B115200
| { 115200, B115200 },
| #endif
| #ifdef B230400
| { 230400, B230400 },
| #endif
| #ifdef B460800
| { 460800, B460800 },
| #endif
| #ifdef B500000
| { 500000, B500000 },
| #endif
| #ifdef B576000
| { 576000, B576000 },
| #endif
| #ifdef B921600
| { 921600, B921600 },
| #endif
| #ifdef B1000000
| { 1000000, B1000000 },
| #endif
| #ifdef B1152000
| { 1152000, B1152000 },
| #endif
| #ifdef B1500000
| { 1500000, B1500000 },
| #endif
| #ifdef B2000000
| { 2000000, B2000000 },
| #endif
| #ifdef B2500000
| { 2500000, B2500000 },
| #endif
| #ifdef B3000000
| { 3000000, B3000000 },
| #endif
| #ifdef B3500000
| { 3500000, B3500000 },
| #endif
| #ifdef B3710000
| { 3710000, B3710000 },
| #endif
| #ifdef B4000000
| { 4000000, B4000000 },
| #endif
| };
| #define UART_BAUD_TABLE_SZ (sizeof uart_baud_table / sizeof uart_baud_table[0])
|
| /**
| * Returns 0 on failure.
| */
| speed_t
| uart_baud_to_speed(int_least32_t baud)
| {
| int i;
|
| for (i = 0; i < UART_BAUD_TABLE_SZ; i++) {
| if (uart_baud_table[i][0] == baud) {
| return uart_baud_table[i][1];
| }
| }
|
| return 0;
| }
|
| /**
| * Configures an external device terminal (/dev/cu.<...>).
| */
| int
| uart_dev_set_attr(int fd, int32_t baudrate, uint8_t databits,
| uint8_t stopbits, enum hal_uart_parity parity,
| enum hal_uart_flow_ctl flow_ctl)
| {
| struct termios tty;
| speed_t speed;
| int rc;
|
| assert(fd >= 0);
|
| memset(&tty, 0, sizeof(tty));
| cfmakeraw(&tty);
|
| speed = uart_baud_to_speed(baudrate);
| if (speed == 0) {
| fprintf(stderr, "invalid baud rate: %d\n", (int)baudrate);
| assert(0);
| }
|
| tty.c_cflag |= (speed | CLOCAL | CREAD);
|
| /* Set flow control. */
| switch (flow_ctl) {
| case HAL_UART_FLOW_CTL_NONE:
| tty.c_cflag &= ~CRTSCTS;
| break;
|
| case HAL_UART_FLOW_CTL_RTS_CTS:
| tty.c_cflag |= CRTSCTS;
| break;
|
| default:
| fprintf(stderr, "invalid flow control setting: %d\n", flow_ctl);
| return -1;
| }
|
| errno = 0;
| rc = cfsetospeed(&tty, speed);
| if (rc != 0) {
| fprintf(stderr, "cfsetospeed failed; %d (%s) baudrate=%d\n",
| errno, strerror(errno), (int)baudrate);
| return -1;
| }
|
| errno = 0;
| rc = cfsetispeed(&tty, speed);
| if (rc != 0) {
| fprintf(stderr, "cfsetispeed failed; %d (%s) baudrate=%d\n",
| errno, strerror(errno), (int)baudrate);
| return -1;
| }
|
| switch (databits) {
| case 7:
| tty.c_cflag |= CS7;
|
| switch (parity) {
| case HAL_UART_PARITY_ODD:
| tty.c_cflag |= PARENB;
| tty.c_cflag |= PARODD;
| tty.c_cflag &= ~CSTOPB;
| tty.c_cflag &= ~CSIZE;
| break;
|
| case HAL_UART_PARITY_EVEN:
| tty.c_cflag |= PARENB;
| tty.c_cflag &= ~PARODD;
| tty.c_cflag &= ~CSTOPB;
| tty.c_cflag &= ~CSIZE;
| break;
|
| default:
| return SYS_EINVAL;
| }
|
| case 8:
| if (parity != HAL_UART_PARITY_NONE) {
| return SYS_EINVAL;
| }
| tty.c_cflag |= CS8;
| tty.c_cflag &= ~PARENB;
| tty.c_cflag &= ~CSTOPB;
| tty.c_cflag &= ~CSIZE;
| break;
|
| default:
| return SYS_EINVAL;
| }
|
| rc = tcsetattr(fd, TCSANOW, &tty);
| if (rc != 0) {
| fprintf(stderr, "tcsetattr failed; %d (%s)\n", errno, strerror(errno));
| return -1;
| }
|
| return 0;
| }
|
|
