1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * btstack_uart_posix.c 40 * 41 * Common code to access serial port via POSIX interface 42 * Used by hci_transport_h4_posix.c and hci_transport_h5.posix 43 * 44 */ 45 46 #include "btstack_uart_posix.h" 47 #include "btstack_debug.h" 48 49 #include <termios.h> /* POSIX terminal control definitions */ 50 #include <fcntl.h> /* File control definitions */ 51 // #include <unistd.h> /* UNIX standard function definitions */ 52 // #include <stdio.h> 53 // #include <string.h> 54 55 int btstack_uart_posix_open(const char * device_name, int flowcontrol, uint32_t baudrate){ 56 57 struct termios toptions; 58 int flags = O_RDWR | O_NOCTTY | O_NONBLOCK; 59 int fd = open(device_name, flags); 60 if (fd == -1) { 61 perror("init_serialport: Unable to open port "); 62 perror(device_name); 63 return -1; 64 } 65 66 if (tcgetattr(fd, &toptions) < 0) { 67 perror("init_serialport: Couldn't get term attributes"); 68 return -1; 69 } 70 71 cfmakeraw(&toptions); // make raw 72 73 // 8N1 74 toptions.c_cflag &= ~CSTOPB; 75 toptions.c_cflag |= CS8; 76 77 if (flowcontrol) { 78 // with flow control 79 toptions.c_cflag |= CRTSCTS; 80 } else { 81 // no flow control 82 toptions.c_cflag &= ~CRTSCTS; 83 } 84 85 toptions.c_cflag |= CREAD | CLOCAL; // turn on READ & ignore ctrl lines 86 toptions.c_iflag &= ~(IXON | IXOFF | IXANY); // turn off s/w flow ctrl 87 88 // see: http://unixwiz.net/techtips/termios-vmin-vtime.html 89 toptions.c_cc[VMIN] = 1; 90 toptions.c_cc[VTIME] = 0; 91 92 if(tcsetattr(fd, TCSANOW, &toptions) < 0) { 93 perror("init_serialport: Couldn't set term attributes"); 94 return -1; 95 } 96 97 // also set baudrate 98 if (btstack_uart_posix_set_baudrate(fd, baudrate) < 0){ 99 return -1; 100 } 101 102 return fd; 103 } 104 105 int btstack_uart_posix_set_baudrate(int fd, uint32_t baudrate){ 106 log_info("h4_set_baudrate %u", baudrate); 107 108 struct termios toptions; 109 110 if (tcgetattr(fd, &toptions) < 0) { 111 perror("init_serialport: Couldn't get term attributes"); 112 return -1; 113 } 114 115 speed_t brate = baudrate; // let you override switch below if needed 116 switch(baudrate) { 117 case 57600: brate=B57600; break; 118 case 115200: brate=B115200; break; 119 #ifdef B230400 120 case 230400: brate=B230400; break; 121 #endif 122 #ifdef B460800 123 case 460800: brate=B460800; break; 124 #endif 125 #ifdef B921600 126 case 921600: brate=B921600; break; 127 #endif 128 129 // Hacks to switch to 2/3 mbps on FTDI FT232 chipsets 130 // requires special config in Info.plist or Registry 131 case 2000000: 132 #if defined(HAVE_POSIX_B300_MAPPED_TO_2000000) 133 log_info("hci_transport_posix: using B300 for 2 mbps"); 134 brate=B300; 135 #elif defined(HAVE_POSIX_B1200_MAPPED_TO_2000000) 136 log_info("hci_transport_posix: using B1200 for 2 mbps"); 137 brate=B1200; 138 #endif 139 break; 140 case 3000000: 141 #if defined(HAVE_POSIX_B600_MAPPED_TO_3000000) 142 log_info("hci_transport_posix: using B600 for 3 mbps"); 143 brate=B600; 144 #elif defined(HAVE_POSIX_B2400_MAPPED_TO_3000000) 145 log_info("hci_transport_posix: using B2400 for 3 mbps"); 146 brate=B2400; 147 #endif 148 break; 149 default: 150 break; 151 } 152 cfsetospeed(&toptions, brate); 153 cfsetispeed(&toptions, brate); 154 155 if( tcsetattr(fd, TCSANOW, &toptions) < 0) { 156 perror("init_serialport: Couldn't set term attributes"); 157 return -1; 158 } 159 160 return 0; 161 } 162