1 /* $NetBSD: icom.c,v 1.3 2012/02/01 07:46:22 kardel Exp $ */ 2 3 /* 4 * Program to control ICOM radios 5 * 6 * This is a ripoff of the utility routines in the ICOM software 7 * distribution. The only function provided is to load the radio 8 * frequency. All other parameters must be manually set before use. 9 */ 10 #include <config.h> 11 #include "icom.h" 12 #include <unistd.h> 13 #include <stdio.h> 14 #include <fcntl.h> 15 #include <errno.h> 16 17 #include "ntp_tty.h" 18 #include "l_stdlib.h" 19 20 #ifdef SYS_WINNT 21 #undef write /* ports/winnt/include/config.h: #define write _write */ 22 extern int async_write(int, const void *, unsigned int); 23 #define write(fd, data, octets) async_write(fd, data, octets) 24 #endif 25 26 /* 27 * Packet routines 28 * 29 * These routines send a packet and receive the response. If an error 30 * (collision) occurs on transmit, the packet is resent. If an error 31 * occurs on receive (timeout), all input to the terminating FI is 32 * discarded and the packet is resent. If the maximum number of retries 33 * is not exceeded, the program returns the number of octets in the user 34 * buffer; otherwise, it returns zero. 35 * 36 * ICOM frame format 37 * 38 * Frames begin with a two-octet preamble PR-PR followyd by the 39 * transceiver address RE, controller address TX, control code CN, zero 40 * or more data octets DA (depending on command), and terminator FI. 41 * Since the bus is bidirectional, every octet output is echoed on 42 * input. Every valid frame sent is answered with a frame in the same 43 * format, but with the RE and TX fields interchanged. The CN field is 44 * set to NAK if an error has occurred. Otherwise, the data are returned 45 * in this and following DA octets. If no data are returned, the CN 46 * octet is set to ACK. 47 * 48 * +------+------+------+------+------+--//--+------+ 49 * | PR | PR | RE | TX | CN | DA | FI | 50 * +------+------+------+------+------+--//--+------+ 51 */ 52 /* 53 * Scraps 54 */ 55 #define DICOM /dev/icom/ /* ICOM port link */ 56 57 /* 58 * Local function prototypes 59 */ 60 static void doublefreq (double, u_char *, int); 61 62 63 /* 64 * icom_freq(fd, ident, freq) - load radio frequency 65 */ 66 int 67 icom_freq( /* returns 0 (ok), EIO (error) */ 68 int fd, /* file descriptor */ 69 int ident, /* ICOM radio identifier */ 70 double freq /* frequency (MHz) */ 71 ) 72 { 73 u_char cmd[] = {PAD, PR, PR, 0, TX, V_SFREQ, 0, 0, 0, 0, FI, 74 FI}; 75 int temp; 76 77 cmd[3] = (char)ident; 78 if (ident == IC735) 79 temp = 4; 80 else 81 temp = 5; 82 doublefreq(freq * 1e6, &cmd[6], temp); 83 temp = write(fd, cmd, temp + 7); 84 85 return (0); 86 } 87 88 89 /* 90 * doublefreq(freq, y, len) - double to ICOM frequency with padding 91 */ 92 static void 93 doublefreq( /* returns void */ 94 double freq, /* frequency */ 95 u_char *x, /* radio frequency */ 96 int len /* length (octets) */ 97 ) 98 { 99 int i; 100 char s1[16]; 101 char *y; 102 103 snprintf(s1, sizeof(s1), " %10.0f", freq); 104 y = s1 + 10; 105 i = 0; 106 while (*y != ' ') { 107 x[i] = *y-- & 0x0f; 108 x[i] = x[i] | ((*y-- & 0x0f) << 4); 109 i++; 110 } 111 for ( ; i < len; i++) 112 x[i] = 0; 113 x[i] = FI; 114 } 115 116 /* 117 * icom_init() - open and initialize serial interface 118 * 119 * This routine opens the serial interface for raw transmission; that 120 * is, character-at-a-time, no stripping, checking or monkeying with the 121 * bits. For Unix, an input operation ends either with the receipt of a 122 * character or a 0.5-s timeout. 123 */ 124 int 125 icom_init( 126 const char *device, /* device name/link */ 127 int speed, /* line speed */ 128 int trace /* trace flags */ ) 129 { 130 TTY ttyb; 131 int fd; 132 int flags; 133 int rc; 134 int saved_errno; 135 136 flags = trace; 137 fd = tty_open(device, O_RDWR, 0777); 138 if (fd < 0) 139 return -1; 140 141 rc = tcgetattr(fd, &ttyb); 142 if (rc < 0) { 143 saved_errno = errno; 144 close(fd); 145 errno = saved_errno; 146 return -1; 147 } 148 ttyb.c_iflag = 0; /* input modes */ 149 ttyb.c_oflag = 0; /* output modes */ 150 ttyb.c_cflag = IBAUD|CS8|CLOCAL; /* control modes (no read) */ 151 ttyb.c_lflag = 0; /* local modes */ 152 ttyb.c_cc[VMIN] = 0; /* min chars */ 153 ttyb.c_cc[VTIME] = 5; /* receive timeout */ 154 cfsetispeed(&ttyb, (u_int)speed); 155 cfsetospeed(&ttyb, (u_int)speed); 156 rc = tcsetattr(fd, TCSANOW, &ttyb); 157 if (rc < 0) { 158 saved_errno = errno; 159 close(fd); 160 errno = saved_errno; 161 return -1; 162 } 163 return (fd); 164 } 165 166 /* end program */ 167