WebSVN – HomeAutomation – Diff – /branches/modules/PcSoftware/UARTscope/scope.c


#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>
#include <stdio.h>
 
#define DEVICE "/dev/midi1"
#define BAUDRATE B115200
#define TRIG_LEVEL 128
#define SAMPLE_FREQ 1000
 
#define SAMPLES_PER_PLOT 200
 
struct termios oldtio,newtio;
 
int main(int argc, char* argv[]) {
    int input;
    FILE* gnuplot;
    int i;
    float out_data;
    unsigned char buf[SAMPLES_PER_PLOT];
    unsigned char trig = TRIG_LEVEL;
    unsigned freq = SAMPLE_FREQ;
   
    input = open(DEVICE, O_RDONLY | O_NOCTTY);
    if (input <0) {perror(DEVICE); return -1; }
    gnuplot = popen("gnuplot", "w");
   
    tcgetattr(input,&oldtio); /* save current port settings */
   
    // bzero not defined? moving newtio outside main to zero it. 
    //bzero(&newtio, sizeof(newtio));
    newtio.c_cflag = BAUDRATE | CRTSCTS | CS8 | CLOCAL | CREAD;
    newtio.c_iflag = IGNPAR;
    newtio.c_oflag = 0;
   
    /* set input mode (non-canonical, no echo,...) */
    newtio.c_lflag = 0;
   
    newtio.c_cc[VTIME]    = 0;   /* inter-character timer unused */
    newtio.c_cc[VMIN]     = SAMPLES_PER_PLOT;   /* blocking read until all samples received */
   
    tcflush(input, TCIFLUSH);
    tcsetattr(input,TCSANOW,&newtio);
   
    fprintf(gnuplot, "set yrange [-0.1:5.1]\n");
    while(1) {
        // Wait for trig
        do {
            if (read(input, buf, 1) != 1) return 0;
        } while (buf[0] >= trig);
        do {
            if (read(input, buf, 1) != 1) return 0;
        } while (buf[0] < trig);
       
        // Read rest of the buffer
        for (i=1; i<SAMPLES_PER_PLOT; i++) {
            if (read(input, buf+i, 1) != 1) return 0;
        }
        //read(input, buf+i, SAMPLES_PER_PLOT-1);
       
        fprintf(gnuplot, "plot '-' with lines\n");
       
        for (i=0; i<SAMPLES_PER_PLOT; i++) {
            out_data = buf[i]*5.0/256;
            fprintf(gnuplot, "%g %g\n", (float)i/freq, out_data);
        }
        fprintf(gnuplot, "e\n"); // Display output
        fflush(gnuplot);
    }
   
    tcsetattr(input,TCSANOW,&oldtio);
    close(input);
    pclose(gnuplot);
    printf("\n");
    return 0;
}
 

Rev 338	Rev 800
1	#include <sys/types.h>	1	#include <sys/types.h>
2	#include <sys/stat.h>	2	#include <sys/stat.h>
3	#include <fcntl.h>	3	#include <fcntl.h>
4	#include <termios.h>	4	#include <termios.h>
5	#include <unistd.h>	5	#include <unistd.h>
6	#include <stdio.h>	6	#include <stdio.h>
7		7
8	#define DEVICE "/dev/midi1"	8	#define DEVICE "/dev/midi1"
9	#define BAUDRATE B115200	9	#define BAUDRATE B115200
10	#define TRIG_LEVEL 128	10	#define TRIG_LEVEL 128
11	#define SAMPLE_FREQ 1000	11	#define SAMPLE_FREQ 1000
12		12
13	#define SAMPLES_PER_PLOT 200	13	#define SAMPLES_PER_PLOT 200
14		14
15	struct termios oldtio,newtio;	15	struct termios oldtio,newtio;
16		16
17	int main(int argc, char* argv[]) {	17	int main(int argc, char* argv[]) {
18	int input;	18	int input;
19	FILE* gnuplot;	19	FILE* gnuplot;
20	int i;	20	int i;
21	float out_data;	21	float out_data;
22	unsigned char buf[SAMPLES_PER_PLOT];	22	unsigned char buf[SAMPLES_PER_PLOT];
23	unsigned char trig = TRIG_LEVEL;	23	unsigned char trig = TRIG_LEVEL;
24	unsigned freq = SAMPLE_FREQ;	24	unsigned freq = SAMPLE_FREQ;
25		25
26	input = open(DEVICE, O_RDONLY \| O_NOCTTY);	26	input = open(DEVICE, O_RDONLY \| O_NOCTTY);
27	if (input <0) {perror(DEVICE); return -1; }	27	if (input <0) {perror(DEVICE); return -1; }
28	gnuplot = popen("gnuplot", "w");	28	gnuplot = popen("gnuplot", "w");
29		29
30	tcgetattr(input,&oldtio); /* save current port settings */	30	tcgetattr(input,&oldtio); /* save current port settings */
31		31
32	// bzero not defined? moving newtio outside main to zero it.	32	// bzero not defined? moving newtio outside main to zero it.
33	//bzero(&newtio, sizeof(newtio));	33	//bzero(&newtio, sizeof(newtio));
34	newtio.c_cflag = BAUDRATE \| CRTSCTS \| CS8 \| CLOCAL \| CREAD;	34	newtio.c_cflag = BAUDRATE \| CRTSCTS \| CS8 \| CLOCAL \| CREAD;
35	newtio.c_iflag = IGNPAR;	35	newtio.c_iflag = IGNPAR;
36	newtio.c_oflag = 0;	36	newtio.c_oflag = 0;
37		37
38	/* set input mode (non-canonical, no echo,...) */	38	/* set input mode (non-canonical, no echo,...) */
39	newtio.c_lflag = 0;	39	newtio.c_lflag = 0;
40		40
41	newtio.c_cc[VTIME] = 0; /* inter-character timer unused */	41	newtio.c_cc[VTIME] = 0; /* inter-character timer unused */
42	newtio.c_cc[VMIN] = SAMPLES_PER_PLOT; /* blocking read until all samples received */	42	newtio.c_cc[VMIN] = SAMPLES_PER_PLOT; /* blocking read until all samples received */
43		43
44	tcflush(input, TCIFLUSH);	44	tcflush(input, TCIFLUSH);
45	tcsetattr(input,TCSANOW,&newtio);	45	tcsetattr(input,TCSANOW,&newtio);
46		46
47	fprintf(gnuplot, "set yrange [-0.1:5.1]\n");	47	fprintf(gnuplot, "set yrange [-0.1:5.1]\n");
48	while(1) {	48	while(1) {
49	// Wait for trig	49	// Wait for trig
50	do {	50	do {
51	if (read(input, buf, 1) != 1) return 0;	51	if (read(input, buf, 1) != 1) return 0;
52	} while (buf[0] >= trig);	52	} while (buf[0] >= trig);
53	do {	53	do {
54	if (read(input, buf, 1) != 1) return 0;	54	if (read(input, buf, 1) != 1) return 0;
55	} while (buf[0] < trig);	55	} while (buf[0] < trig);
56		56
57	// Read rest of the buffer	57	// Read rest of the buffer
58	for (i=1; i<SAMPLES_PER_PLOT; i++) {	58	for (i=1; i<SAMPLES_PER_PLOT; i++) {
59	if (read(input, buf+i, 1) != 1) return 0;	59	if (read(input, buf+i, 1) != 1) return 0;
60	}	60	}
61	//read(input, buf+i, SAMPLES_PER_PLOT-1);	61	//read(input, buf+i, SAMPLES_PER_PLOT-1);
62		62
63	fprintf(gnuplot, "plot '-' with lines\n");	63	fprintf(gnuplot, "plot '-' with lines\n");
64		64
65	for (i=0; i<SAMPLES_PER_PLOT; i++) {	65	for (i=0; i<SAMPLES_PER_PLOT; i++) {
66	out_data = buf[i]*5.0/256;	66	out_data = buf[i]*5.0/256;
67	fprintf(gnuplot, "%g %g\n", (float)i/freq, out_data);	67	fprintf(gnuplot, "%g %g\n", (float)i/freq, out_data);
68	}	68	}
69	fprintf(gnuplot, "e\n"); // Display output	69	fprintf(gnuplot, "e\n"); // Display output
70	fflush(gnuplot);	70	fflush(gnuplot);
71	}	71	}
72		72
73	tcsetattr(input,TCSANOW,&oldtio);	73	tcsetattr(input,TCSANOW,&oldtio);
74	close(input);	74	close(input);
75	pclose(gnuplot);	75	pclose(gnuplot);
76	printf("\n");	76	printf("\n");
77	return 0;	77	return 0;
78	}	78	}
79		79

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(root)/branches/modules/PcSoftware/UARTscope/scope.c – Rev 338 → 800