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contiki/tools/sky/serialdump.c
Yannic Schröder d524211c2a Clean exit of serialdump when hitting Ctrl-C 
Ctrl-C is the best way to close serialdump after using make login.
With a clean exit it will signal to make that the make run was successful.
2016-09-20 14:18:21 +02:00

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C
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#define _GNU_SOURCE
#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#define BAUDRATE B115200
#define BAUDRATE_S "115200"
#ifdef linux
#define MODEMDEVICE "/dev/ttyS0"
#else
#define MODEMDEVICE "/dev/com1"
#endif /* linux */
#define SLIP_END 0300
#define SLIP_ESC 0333
#define SLIP_ESC_END 0334
#define SLIP_ESC_ESC 0335
#define CSNA_INIT 0x01
#define BUFSIZE 40
#define HCOLS 20
#define ICOLS 18
#define MODE_START_DATE 0
#define MODE_DATE 1
#define MODE_START_TEXT 2
#define MODE_TEXT 3
#define MODE_INT 4
#define MODE_HEX 5
#define MODE_SLIP_AUTO 6
#define MODE_SLIP 7
#define MODE_SLIP_HIDE 8
static unsigned char rxbuf[2048];
static int
usage(int result)
{
printf("Usage: serialdump [-x] [-s[on]] [-i] [-bSPEED] [SERIALDEVICE]\n");
printf(" -x for hexadecimal output\n");
printf(" -i for decimal output\n");
printf(" -s for automatic SLIP mode\n");
printf(" -so for SLIP only mode (all data is SLIP packets)\n");
printf(" -sn to hide SLIP packages\n");
printf(" -T[format] to add time for each text line\n");
printf(" (see man page for strftime() for format description)\n");
return result;
}
static void
print_hex_line(char *prefix, unsigned char *outbuf, int index)
{
int i;
printf("\r%s", prefix);
for(i = 0; i < index; i++) {
if((i % 4) == 0) {
printf(" ");
}
printf("%02X", outbuf[i] & 0xFF);
}
printf(" ");
for(i = index; i < HCOLS; i++) {
if((i % 4) == 0) {
printf(" ");
}
printf(" ");
}
for(i = 0; i < index; i++) {
if(outbuf[i] < 30 || outbuf[i] > 126) {
printf(".");
} else {
printf("%c", outbuf[i]);
}
}
}
static void
intHandler(int sig)
{
exit(0);
}
int
main(int argc, char **argv)
{
signal(SIGINT, intHandler);
struct termios options;
fd_set mask, smask;
int fd;
speed_t speed = BAUDRATE;
char *speedname = BAUDRATE_S;
char *device = MODEMDEVICE;
char *timeformat = NULL;
unsigned char buf[BUFSIZE];
char outbuf[HCOLS];
unsigned char mode = MODE_START_TEXT;
int nfound, flags = 0;
unsigned char lastc = '\0';
int index = 1;
while(index < argc) {
if(argv[index][0] == '-') {
switch(argv[index][1]) {
case 'b':
/* set speed */
if(strcmp(&argv[index][2], "38400") == 0) {
speed = B38400;
speedname = "38400";
} else if(strcmp(&argv[index][2], "19200") == 0) {
speed = B19200;
speedname = "19200";
} else if(strcmp(&argv[index][2], "57600") == 0) {
speed = B57600;
speedname = "57600";
} else if(strcmp(&argv[index][2], "115200") == 0) {
speed = B115200;
speedname = "115200";
} else {
fprintf(stderr, "unsupported speed: %s\n", &argv[index][2]);
return usage(1);
}
break;
case 'x':
mode = MODE_HEX;
break;
case 'i':
mode = MODE_INT;
break;
case 's':
switch(argv[index][2]) {
case 'n':
mode = MODE_SLIP_HIDE;
break;
case 'o':
mode = MODE_SLIP;
break;
default:
mode = MODE_SLIP_AUTO;
break;
}
break;
case 'T':
if(strlen(&argv[index][2]) == 0) {
timeformat = "%Y-%m-%d %H:%M:%S";
} else {
timeformat = &argv[index][2];
}
mode = MODE_START_DATE;
break;
case 'h':
return usage(0);
default:
fprintf(stderr, "unknown option '%c'\n", argv[index][1]);
return usage(1);
}
index++;
} else {
device = argv[index++];
if(index < argc) {
fprintf(stderr, "too many arguments\n");
return usage(1);
}
}
}
fprintf(stderr, "connecting to %s (%s)", device, speedname);
#ifndef O_SYNC
#define O_SYNC 0
#endif
#ifdef O_DIRECT
fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY | O_DIRECT | O_SYNC);
/* Some systems do not support certain parameters (e.g. raspbian)
* Just do some random testing. Not sure whether there is a better way
* of doing this. */
if(fd < 0 && errno == EINVAL){
fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY | O_SYNC);
}
#else
fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY | O_SYNC);
#endif
if(fd < 0) {
fprintf(stderr, "\n");
perror("open");
exit(-1);
}
fprintf(stderr, " [OK]\n");
if(fcntl(fd, F_SETFL, 0) < 0) {
perror("could not set fcntl");
exit(-1);
}
if(tcgetattr(fd, &options) < 0) {
perror("could not get options");
exit(-1);
}
/* fprintf(stderr, "serial options set\n"); */
cfsetispeed(&options, speed);
cfsetospeed(&options, speed);
/* Enable the receiver and set local mode */
options.c_cflag |= (CLOCAL | CREAD);
/* Mask the character size bits and turn off (odd) parity */
options.c_cflag &= ~(CSIZE | PARENB | PARODD);
/* Select 8 data bits */
options.c_cflag |= CS8;
/* Raw input */
options.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
| INLCR | IGNCR | ICRNL | IXON);
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
/* Raw output */
options.c_oflag &= ~OPOST;
if(tcsetattr(fd, TCSANOW, &options) < 0) {
perror("could not set options");
exit(-1);
}
/* Make read() return immediately */
/* if (fcntl(fd, F_SETFL, FNDELAY) < 0) { */
/* perror("\ncould not set fcntl"); */
/* exit(-1); */
/* } */
FD_ZERO(&mask);
FD_SET(fd, &mask);
FD_SET(fileno(stdin), &mask);
index = 0;
for(;;) {
smask = mask;
nfound = select(FD_SETSIZE, &smask, (fd_set *) 0, (fd_set *) 0, (struct timeval *) 0);
if(nfound < 0) {
if(errno == EINTR) {
fprintf(stderr, "interrupted system call\n");
continue;
}
/* something is very wrong! */
perror("select");
exit(1);
}
if(FD_ISSET(fileno(stdin), &smask)) {
/* data from standard in */
int n = read(fileno(stdin), buf, sizeof(buf));
if(n < 0) {
perror("could not read");
exit(-1);
} else if(n > 0) {
/* because commands might need parameters, lines needs to be
separated which means the terminating LF must be sent */
/* while(n > 0 && buf[n - 1] < 32) { */
/* n--; */
/* } */
if(n > 0) {
int i;
/* fprintf(stderr, "SEND %d bytes\n", n);*/
/* write slowly */
for(i = 0; i < n; i++) {
if(write(fd, &buf[i], 1) <= 0) {
perror("write");
exit(1);
} else {
fflush(NULL);
usleep(6000);
}
}
}
} else {
/* End of input, exit. */
exit(0);
}
}
if(FD_ISSET(fd, &smask)) {
int i, n = read(fd, buf, sizeof(buf));
if(n < 0) {
perror("could not read");
exit(-1);
}
if(n == 0) {
errno = EBADF;
perror("serial device disconnected");
exit(-1);
}
for(i = 0; i < n; i++) {
switch(mode) {
case MODE_START_TEXT:
case MODE_TEXT:
printf("%c", buf[i]);
break;
case MODE_START_DATE: {
time_t t;
t = time(&t);
strftime(outbuf, HCOLS, timeformat, localtime(&t));
printf("%s|", outbuf);
mode = MODE_DATE;
}
/* continue into the MODE_DATE */
case MODE_DATE:
printf("%c", buf[i]);
if(buf[i] == '\n') {
mode = MODE_START_DATE;
}
break;
case MODE_INT:
printf("%03d ", buf[i]);
if(++index >= ICOLS) {
index = 0;
printf("\n");
}
break;
case MODE_HEX:
rxbuf[index++] = buf[i];
if(index >= HCOLS) {
print_hex_line("", rxbuf, index);
index = 0;
printf("\n");
}
break;
case MODE_SLIP_AUTO:
case MODE_SLIP_HIDE:
if(!flags && (buf[i] != SLIP_END)) {
/* Not a SLIP packet? */
printf("%c", buf[i]);
break;
}
/* continue to slip only mode */
case MODE_SLIP:
switch(buf[i]) {
case SLIP_ESC:
lastc = SLIP_ESC;
break;
case SLIP_END:
if(index > 0) {
if(flags != 2 && mode != MODE_SLIP_HIDE) {
/* not overflowed: show packet */
print_hex_line("SLIP: ", rxbuf, index > HCOLS ? HCOLS : index);
printf("\n");
}
lastc = '\0';
index = 0;
flags = 0;
} else {
flags = !flags;
}
break;
default:
if(lastc == SLIP_ESC) {
lastc = '\0';
/* Previous read byte was an escape byte, so this byte will be
interpreted differently from others. */
switch(buf[i]) {
case SLIP_ESC_END:
buf[i] = SLIP_END;
break;
case SLIP_ESC_ESC:
buf[i] = SLIP_ESC;
break;
}
}
rxbuf[index++] = buf[i];
if(index >= sizeof(rxbuf)) {
fprintf(stderr, "**** slip overflow\n");
index = 0;
flags = 2;
}
break;
}
break;
}
}
/* after processing for some output modes */
if(index > 0) {
switch(mode) {
case MODE_HEX:
print_hex_line("", rxbuf, index);
break;
}
}
fflush(stdout);
}
}
}
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