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rigol-viewer.c
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// rigol-viewer.c - a gtk-application for readout some data from Rigol DS1000 series scopes
// The function rigol_read and rigol_write was written by Mark Whitis, 2012 by Jiri Pittner <[email protected]>
// See http://www.pittnerovi.com/jiri/hobby/electronics/rigol/rigol.c
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/usb/tmc.h>
#include <gtk/gtk.h>
#include <cairo/cairo.h>
#define NODEBUG
#define MAX_DEVICE_SEARCH 10
#define PROGRAM "Rigol DSO viewer"
#define VERSION "v 1.3 GTK"
#define COPYRIGHT "Andreas Fischer 11/2016"
#define COMMENT "Viewer for Rigol DS1000 serie"
#define URI "https://github.com/andi-f/rigol-viewer"
#define HEIGHT 600
#define WIDTH 800
typedef struct {
unsigned char *buffer; //buffer for data
long *length; //length of data
double *time_scale;
double *time_offset;
double *voltage_scale;
double *voltage_offset;
int *device; // /dev/usbtmcx
long *mode; // 0 time 1 frequency 2 LA
GtkWidget *darea; // gtk drawing area
GtkWidget *statusbar; // gtk statusbar
GtkWidget *filesel; // gtk statusbar
} rigol_data;
int rigol_read(int handle, unsigned char *buf, size_t size);
int rigol_write(int handle, unsigned char *string);
void get_channel1(GtkWidget *widget, rigol_data *data);
void get_channel2(GtkWidget *widget, rigol_data *data);
void get_channel_data(rigol_data *data,char *channel);
void get_fft(GtkWidget *widget, rigol_data *data);
void get_la(GtkWidget *widget, rigol_data *data);
void find_DS1000(rigol_data *data);
void filesel_open(GtkWidget *widget, rigol_data *data);
static gboolean drawing_screen(GtkWidget *widget, GdkEventExpose *event, rigol_data *data);
void create_png(GtkWidget *widget, rigol_data *data);
void plot(cairo_t *cr, rigol_data *data, gint width, gint height);
void plot_la(cairo_t *cr, rigol_data *data, gint width, gint height);
void about(GtkWidget *widget, gpointer data);
int main(int argc, char *argv[]) {
rigol_data data;
GtkWidget *window;
GtkWidget *vbox1;
GtkWidget *darea;
GtkWidget *menubar1;
GtkWidget *menu_quit;
GtkWidget *menuitem_quit;
GtkWidget *menu_ch;
GtkWidget *menuitem_ch;
GtkWidget *menu_ch1_set;
GtkWidget *menuitem_ch1_set;
GtkWidget *menu_ch2_set;
GtkWidget *menuitem_ch2_set;
GtkWidget *menu_time_set;
GtkWidget *menuitem_time_set;
GtkWidget *menu_png;
GtkWidget *menuitem_png;
GtkWidget *menu_about;
GtkWidget *menuitem_about;
GtkWidget *statusbar;
data.buffer = (unsigned char *) malloc(1049600 * sizeof(unsigned char));
data.length = (long *) malloc(sizeof(long));
data.time_scale = (double *) malloc(sizeof(double));
data.time_offset = (double *) malloc(sizeof(double));
data.voltage_scale = (double *) malloc(sizeof(double));
data.voltage_offset = (double *) malloc(sizeof(double));
data.device = (int *) malloc(sizeof(int));
data.mode = (long *) malloc(sizeof(long));
//Searching for Rigol DS1000 series scopes
find_DS1000(&data);
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(window, "destroy",
G_CALLBACK(gtk_main_quit), NULL);
vbox1 = gtk_vbox_new(FALSE, 0);
gtk_container_add(GTK_CONTAINER(window), vbox1);
menubar1 = gtk_menu_bar_new();
gtk_box_pack_start(GTK_BOX(vbox1), menubar1, FALSE, FALSE, 2);
darea = gtk_drawing_area_new();
gtk_box_pack_start (GTK_BOX(vbox1), darea, TRUE, TRUE, 0);
gtk_widget_set_app_paintable(darea, TRUE);
g_signal_connect(darea, "expose-event", G_CALLBACK(drawing_screen),(gpointer*) &data);
gtk_widget_set_app_paintable(darea, TRUE);
statusbar = gtk_statusbar_new();
gtk_box_pack_start(GTK_BOX(vbox1), statusbar, FALSE, TRUE, 1);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
gtk_window_set_default_size(GTK_WINDOW(window), WIDTH, HEIGHT);
gtk_window_set_title(GTK_WINDOW(window), PROGRAM);
//Quit
menu_quit = gtk_menu_new();
menuitem_quit = gtk_menu_item_new_with_label("Quit");
gtk_menu_append(GTK_MENU(menu_quit), menuitem_quit);
gtk_signal_connect(GTK_OBJECT(menuitem_quit), "activate",
GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
menuitem_quit = gtk_menu_item_new_with_label("Quit");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem_quit),
menu_quit);
gtk_menu_bar_append(GTK_MENU_BAR(menubar1), menuitem_quit);
//Select source
menu_ch = gtk_menu_new();
menuitem_ch = gtk_menu_item_new_with_label("Channel 1");
gtk_signal_connect(GTK_OBJECT(menuitem_ch), "activate",
G_CALLBACK(get_channel1),(gpointer*) &data);
gtk_menu_append(GTK_MENU(menu_ch), menuitem_ch);
menuitem_ch = gtk_menu_item_new_with_label("Channel 2");
gtk_signal_connect(GTK_OBJECT(menuitem_ch), "activate",
G_CALLBACK(get_channel2),(gpointer*) &data);
gtk_menu_append(GTK_MENU(menu_ch), menuitem_ch);
menuitem_ch = gtk_menu_item_new_with_label("FFT");
gtk_signal_connect(GTK_OBJECT(menuitem_ch), "activate",
G_CALLBACK(get_fft),(gpointer*) &data);
gtk_menu_append(GTK_MENU(menu_ch), menuitem_ch);
menuitem_ch = gtk_menu_item_new_with_label("LA");
gtk_signal_connect(GTK_OBJECT(menuitem_ch), "activate",
G_CALLBACK(get_la),(gpointer*) &data);
gtk_menu_append(GTK_MENU(menu_ch), menuitem_ch);
menuitem_ch = gtk_menu_item_new_with_label("Select source");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem_ch),
menu_ch);
gtk_menu_bar_append(GTK_MENU_BAR(menubar1), menuitem_ch);
//Channel
menu_ch1_set = gtk_menu_new();
menuitem_ch1_set = gtk_menu_item_new_with_label("100V/div");
gtk_signal_connect(GTK_OBJECT(menuitem_ch1_set), "activate",
G_CALLBACK(menu_ch1_set),10);
gtk_menu_append(GTK_MENU(menu_ch1_set), menuitem_ch1_set);
menuitem_ch1_set = gtk_menu_item_new_with_label("Channel 1");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem_ch1_set),
menu_ch1_set);
gtk_menu_bar_append(GTK_MENU_BAR(menubar1), menuitem_ch1_set);
//PNG
menu_png = gtk_menu_new();
menuitem_png = gtk_menu_item_new_with_label("Create PNG");
gtk_signal_connect(GTK_OBJECT(menuitem_png), "activate",
G_CALLBACK(create_png), (gpointer*) &data);
gtk_menu_append(GTK_MENU(menu_png), menuitem_png);
menuitem_png = gtk_menu_item_new_with_label("Create PNG");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem_png),
menu_png);
gtk_menu_bar_append(GTK_MENU_BAR(menubar1), menuitem_png);
//About
menu_about = gtk_menu_new();
menuitem_about = gtk_menu_item_new_with_label("Info");
gtk_signal_connect(GTK_OBJECT(menuitem_about), "activate",
GTK_SIGNAL_FUNC(about), NULL);
gtk_menu_append(GTK_MENU(menu_about), menuitem_about);
menuitem_about = gtk_menu_item_new_with_label("About");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem_about),
menu_about);
gtk_menu_bar_append(GTK_MENU_BAR(menubar1), menuitem_about);
data.darea = darea;
data.statusbar = statusbar;
gtk_widget_show_all(window);
gtk_main();
free(data.buffer);
free(data.length);
free(data.time_scale);
free(data.time_offset);
free(data.voltage_scale);
free(data.voltage_offset);
free(data.device);
free(data.mode);
return 0;
}
// Callback for about
void about(GtkWidget *widget, gpointer data) {
GtkWidget *dialog = gtk_about_dialog_new();
gtk_about_dialog_set_name(GTK_ABOUT_DIALOG(dialog), PROGRAM);
gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(dialog), VERSION);
gtk_about_dialog_set_copyright(GTK_ABOUT_DIALOG(dialog), COPYRIGHT);
gtk_about_dialog_set_comments(GTK_ABOUT_DIALOG(dialog), COMMENT);
gtk_about_dialog_set_website(GTK_ABOUT_DIALOG(dialog), URI);
gtk_dialog_run(GTK_DIALOG (dialog));
gtk_widget_destroy(dialog);
}
// Get channel1
void get_channel1(GtkWidget *widget, rigol_data *data) {
char device[20]="";
get_channel_data(data,"CHAN1");
sprintf(device,"/dev/usbtmc%d",*data->device);
gtk_statusbar_push(GTK_STATUSBAR(data->statusbar),gtk_statusbar_get_context_id(GTK_STATUSBAR(data->statusbar), "Stopped"),"Stopped");
gtk_widget_queue_draw_area(data->darea, 0, 0, WIDTH, HEIGHT);
return;
}
// Get channel2
void get_channel2(GtkWidget *widget, rigol_data *data) {
char device[20]="";
get_channel_data(data,"CHAN2");
sprintf(device,"/dev/usbtmc%d",*data->device);
gtk_statusbar_push(GTK_STATUSBAR(data->statusbar),gtk_statusbar_get_context_id(GTK_STATUSBAR(data->statusbar), device),device);
gtk_widget_queue_draw_area(data->darea, 0, 0, WIDTH, HEIGHT);
return;
}
// Reading data for channel 1+2
void get_channel_data(rigol_data *data,char *channel) {
const int max_response_length=1024*1024+1024;
char device[20]="";
int handle;
long rc;
int i;
unsigned char buf[max_response_length];
double dummy_double;
sprintf(device,"/dev/usbtmc%d",*data->device);
#ifdef DEBUG
g_print("%s\n",device);
#endif
handle=open(device, O_RDWR);
if(handle<0) {
perror("error opening device");
return;
}
rigol_write(handle, ":STOP");
rigol_write(handle, ":WAV:POIN:MODE NOR");
sprintf(buf,":WAV:DATA? %s",channel);
#ifdef DEBUG
g_print("%s\n",buf);
#endif
rigol_write(handle, buf);
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
for(i=0;i<rc;i++) {//10
g_print(" %02X ",buf[i]);
if( (i%24)==31 )
g_print("\n");
}
g_print("\n");
g_print("%li\n", rc);
#endif
memcpy(data->buffer, buf,rc);
memcpy(data->length, &rc, sizeof(rc));
sprintf(buf,":%s:SCAL?",channel);
#ifdef DEBUG
g_print("%s\n",buf);
#endif
rigol_write(handle,buf);
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Voltage: %s V/DIV\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->voltage_scale, &dummy_double, sizeof(dummy_double));
sprintf(buf,":%s:OFFS?",channel);
#ifdef DEBUG
g_print("%s\n",buf);
#endif
rigol_write(handle,buf);
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Offset %s V\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->voltage_offset, &dummy_double, sizeof(dummy_double));
rigol_write(handle,":TIM:SCAL?");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Time: %s s/DIV\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->time_scale, &dummy_double, sizeof(dummy_double));
rigol_write(handle,":TIM:OFFS?");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Time offset %s s\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->time_offset, &dummy_double, sizeof(dummy_double));
rigol_write(handle, ":RUN");
rigol_write(handle,":KEY:LOCK DISABLE");
close(handle);
rc=0; //time-scale
memcpy(data->mode, &rc, sizeof(rc));
return;
}
// Reading FFT
void get_fft(GtkWidget *widget, rigol_data *data) {
const int max_response_length=1024*1024+1024;
char device[20]="";
int handle;
long rc;
int i;
unsigned char buf[max_response_length];
sprintf(device,"/dev/usbtmc%d",*data->device);
handle=open(device, O_RDWR);
if(handle<0) {
perror("error opening device");
return;
}
rigol_write(handle, ":MAT:DISP ON");
rigol_write(handle, ":MAT:OPER FFT");
rigol_write(handle, ":FFT:DISP ON");
rigol_write(handle, ":STOP");
rigol_write(handle, ":WAV:POIN:MODE NOR"); //can be NOR RAW MAX
rigol_write(handle, ":WAV:DATA? FFT");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
for(i=0;i<rc;i++) {//10
g_print(" %02X ",buf[i]);
if( (i%24)==31 )
g_print("\n");
}
g_print("\n");
g_print("%li\n", rc);
#endif
memcpy(data->buffer, buf,rc);
memcpy(data->length, &rc, sizeof(rc));
rigol_write(handle, ":RUN");
rigol_write(handle,":KEY:LOCK DISABLE");
close(handle);
rc=1; //FFT
memcpy(data->mode, &rc, sizeof(rc));
gtk_statusbar_push(GTK_STATUSBAR(data->statusbar),gtk_statusbar_get_context_id(GTK_STATUSBAR(data->statusbar), device),device);
gtk_widget_queue_draw_area(data->darea, 0, 0, WIDTH, HEIGHT);
return;
}
// Reading Logicanalyser
void get_la(GtkWidget *widget, rigol_data *data) {
const int max_response_length=1024*1024+1024;
char device[20]="";
int handle;
long rc;
int i;
unsigned char buf[max_response_length];
double dummy_double;
sprintf(device,"/dev/usbtmc%d",*data->device);
handle=open(device, O_RDWR);
if(handle<0) {
perror("error opening device");
return;
}
//Display all digital inputs
rigol_write(handle, ":LA:DISP ON");
rigol_write(handle, ":LA:GROU1 ON");
rigol_write(handle, ":LA:GROU1:SIZ S");
rigol_write(handle, ":LA:GROU2 ON");
rigol_write(handle, ":LA:GROU2:SIZ S");
rigol_write(handle, ":LA:POS:RES");
rigol_write(handle, ":STOP");
rigol_write(handle, ":WAV:POIN:MODE NOR"); //can be NOR RAW MAX
rigol_write(handle, ":WAV:DATA? DIG");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
for(i=0;i<rc;i++) {//10
g_print(" %02X ",buf[i]);
if( (i%24)==31 )
g_print("\n");
}
g_print("\n");
g_print("%li\n", rc);
#endif
memcpy(data->buffer, buf,rc);
memcpy(data->length, &rc, sizeof(rc));
rigol_write(handle,":TIM:SCAL?");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Time: %s s/DIV\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->time_scale, &dummy_double, sizeof(dummy_double));
rigol_write(handle,":TIM:OFFS?");
rc=rigol_read(handle, buf,max_response_length);
#ifdef DEBUG
g_print("Time offset %s s\n", buf);
#endif
dummy_double = atof(buf);
memcpy(data->time_offset, &dummy_double, sizeof(dummy_double));
rigol_write(handle, ":RUN");
rigol_write(handle,":KEY:LOCK DISABLE");
close(handle);
rc=2; //LA
memcpy(data->mode, &rc, sizeof(rc));
gtk_statusbar_push(GTK_STATUSBAR(data->statusbar),gtk_statusbar_get_context_id(GTK_STATUSBAR(data->statusbar), device),device);
gtk_widget_queue_draw_area(data->darea, 0, 0, WIDTH, HEIGHT);
return;
}
// Reading device
int rigol_write(int handle, unsigned char *string) {
int rc;
unsigned char buf[256];
strncpy(buf,string,sizeof(buf));
buf[sizeof(buf)-1]=0;
strncat(buf,"\n",sizeof(buf));
buf[sizeof(buf)-1]=0;
rc=write(handle, buf, strlen(buf));
if(rc<0)
perror("write error");
return(rc);
}
//Writing device
int rigol_read(int handle, unsigned char *buf, size_t size) {
int rc;
if(!size)
return(-1);
buf[0]=0;
rc=read(handle, buf, size);
if((rc>0) && (rc<size))
buf[rc]=0;
if(rc<0) {
if(errno==ETIMEDOUT)
g_print("No response\n");
else {
perror("read error");
}
}
// g_print("rc=%d\n",rc);
return(rc);
}
// Redraw Screen
static gboolean drawing_screen(GtkWidget *widget, GdkEventExpose *event, rigol_data *data) {
gint width,
height; // Window width & height
cairo_t *cr;
cr = gdk_cairo_create(widget->window);
gdk_drawable_get_size(widget->window, &width, &height);
if((*data->mode == 0) ||(*data->mode == 1))
plot(cr, data,width,height);
else
if(*data->mode == 2)
plot_la(cr, data,width,height);
cairo_destroy(cr);
return TRUE;
}
// Create image
void create_png(GtkWidget *widget, rigol_data *data) {
gint width = 800,
height = 600; // Window width &
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cr = cairo_create(surface);
if(*data->mode == 0) {
plot(cr, data,width,height);
cairo_surface_write_to_png(surface, "~/image-channel.png");
}
else
if(*data->mode == 1) {
plot(cr, data,width,height);
cairo_surface_write_to_png(surface, "~/image-fft.png");
}
else
if(*data->mode == 2) {
plot_la(cr, data,width,height);
cairo_surface_write_to_png(surface, "~/image-LA.png");
}
cairo_surface_destroy(surface);
cairo_destroy(cr);
return;
}
// Plot Data from Channelx and FFT
void plot(cairo_t *cr, rigol_data *data, gint width, gint height) {
double A; // actual value
double X_DIV = 10.0; // 10 div/x
double Y_DIV = 8.0; // 8 div/y
double MAX_Y = 225.0; // max Y scale we know from experimentation that the scope display range is actually 25-225
double MIN_Y = 25.0; // min Y scale
double MAX_X = 10.0; // max X scale
double MIN_X = 0.0; // min X scale
double XMAX; // max dots x-scale
double YMAX; // max dots y-scale
double XOFFSET; // start of diagramm
double YOFFSET; // start of diagramm
double x, y; // actual plot postion
double x_alt,y_alt; // last plot postion
double x_scale,y_scale; // scale for axis
double x_zero,y_zero; // point of origin
char string_buf[80]; // line buffer
unsigned char *ptr; // pointer to Data
long n = 0;
long m = 0;
ptr = data->buffer;
n = *data->length;
ptr = ptr + 10; //real data begins with offset + 10
n = n - 10;
cairo_rectangle(cr, 0.0, 0.0, width, height);
cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
cairo_fill(cr);
cairo_select_font_face(cr, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 10.0);
cairo_set_line_width(cr, 1.0);
XMAX = 0.90 * width;
YMAX = 0.80 * height;
XOFFSET = 0.5 * (width-XMAX);
YOFFSET = 0.5 * (height-YMAX);
x_scale = XMAX / (MAX_X-MIN_X) * MAX_X / n;
y_scale = YMAX / (MAX_Y-MIN_Y);
x_zero = XOFFSET + MIN_X * x_scale;
y_zero = YOFFSET + YMAX/2.0;
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
sprintf(string_buf,"%s %s",PROGRAM,VERSION);
cairo_move_to (cr,10, 0.2* YOFFSET);
cairo_show_text(cr, string_buf);
cairo_stroke(cr);
for(m = 0; m < X_DIV+1;m ++)
{
x = m * XMAX / X_DIV + XOFFSET;
if( (x >= XOFFSET) && (x <= XOFFSET+XMAX) )
{
cairo_move_to(cr,x,YOFFSET);
cairo_line_to(cr,x,YMAX+YOFFSET);
}
}
for(m = 0; m < Y_DIV+1;m ++)
{
y = m * YMAX / Y_DIV + YOFFSET;
cairo_move_to(cr,XOFFSET,y);
cairo_line_to (cr,XMAX+XOFFSET,y);
}
cairo_stroke(cr);
cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
A = (*ptr-125);
x_alt = x_zero;
y_alt = y_zero + A * y_scale;
if(x_alt < XOFFSET)
x_alt = XOFFSET;
else
if(x_alt > (XOFFSET+XMAX) )
x_alt = XOFFSET+YMAX;
if(y_alt < YOFFSET)
y_alt = YOFFSET;
else
if(y_alt > (YOFFSET+YMAX) )
y_alt = YOFFSET+YMAX;
ptr++;
for(m = 1; m <= n-1; m ++) {
A = (*ptr-125);
x = x_zero + m * x_scale;
y = y_zero + A * y_scale;
ptr++;
if(x < XOFFSET)
x = XOFFSET;
else
if(x > (XOFFSET+XMAX) )
x = XOFFSET+YMAX;
if(y < YOFFSET)
y = YOFFSET;
else
if(y > (YOFFSET+YMAX) )
y = YOFFSET+YMAX;
cairo_move_to(cr,x_alt,y_alt);
cairo_line_to (cr,x,y);
x_alt = x;
y_alt = y;
}
cairo_stroke(cr);
if(*data->mode == 0) {
if(*data->voltage_scale < 1E-3)
sprintf(string_buf,"Voltage: %3.1f mV/DIV",*data->voltage_scale*1E3);
else
sprintf(string_buf,"Voltage: %3.1f V/DIV",*data->voltage_scale);
cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
cairo_move_to (cr,XOFFSET, YMAX + 1.4 *YOFFSET);
cairo_show_text(cr, string_buf);
if(fabs(*data->voltage_offset) < 1E-3)
sprintf(string_buf,"Voltage offset: %3.1f mV",*data->voltage_offset*1E3);
else
sprintf(string_buf,"Voltage : %3.1f V",*data->voltage_offset);
cairo_set_source_rgb(cr, 1.0, 0.0, 0.0);
cairo_move_to (cr,XOFFSET, YMAX + 1.7 *YOFFSET);
cairo_show_text(cr, string_buf);
if(*data->time_scale < 1E-6)
sprintf(string_buf,"Time: %3.1f ns/DIV",*data->time_scale*1E9);
else
if(*data->time_scale < 1E-3)
sprintf(string_buf,"Time: %3.1f µs/DIV",*data->time_scale*1E6);
else
if(*data->time_scale < 1)
sprintf(string_buf,"Time: %3.1f ms/DIV",*data->time_scale*1E3);
else
sprintf(string_buf,"Time: %3.1f s/DIV",*data->time_scale);
cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
cairo_move_to (cr,XMAX/2, YMAX + 1.4 *YOFFSET);
cairo_show_text(cr, string_buf);
if(fabs(*data->time_offset) < 1E-3)
sprintf(string_buf,"Time offset: %3.1f µs",*data->time_offset*1E6);
else
if(fabs(*data->time_offset) < 1)
sprintf(string_buf,"Timet: %3.1f ms",*data->time_offset*1E3);
else
sprintf(string_buf,"Timet: %3.1f s",*data->time_offset);
cairo_set_source_rgb(cr, 1.0, 0.0, 1.0);
cairo_move_to (cr,XMAX/2, YMAX + 1.7 *YOFFSET);
cairo_show_text(cr, string_buf);
}
}
// Plot Data from LA
void plot_la(cairo_t *cr, rigol_data *data, gint width, gint height) {
double A; // actual value
double X_DIV = 1.0; // 10 div/x
double Y_DIV = 1.0; // 1 div/y
double MAX_Y = 16.0; // max Y scale LA data has 16 bits
double MIN_Y = 0.0; // min Y scale
double MAX_X = 10.0; // max X scale
double MIN_X = 0.0; // min X scale
double XMAX; // max dots x-scale
double YMAX; // max dots y-scale
double XOFFSET; // start of diagramm
double YOFFSET; // start of diagramm
double x, y; // actual plot postion
double x_alt,y_alt; // last plot postion
double x_scale,y_scale; // scale for axis
double x_zero,y_zero; // point of origin
char string_buf[80]; // line buffer
unsigned char *ptr; // pointer to Data
long n = 0; // number of data
long m = 0; // counter
int o = 0; // bit
int p = 0; //
ptr = data->buffer;
n = *data->length;
ptr = ptr + 10; //real data begins with offset + 10
n = (n - 10)/2; //LA data are splited in to byte, LSB/MSB
cairo_rectangle(cr, 0.0, 0.0, width, height);
cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
cairo_fill(cr);
cairo_select_font_face(cr, "Sans", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 10.0);
cairo_set_line_width(cr, 1.0);
XMAX = 0.90 * width;
YMAX = 0.80 * height;
XOFFSET = 0.5 * (width-XMAX);
YOFFSET = 0.5 * (height-YMAX);
x_scale = XMAX / (MAX_X-MIN_X) * MAX_X / n;
y_scale = YMAX / (MAX_Y-MIN_Y);
x_zero = XOFFSET + MIN_X * x_scale;
y_zero = YOFFSET + YMAX;
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
sprintf(string_buf,"%s %s",PROGRAM,VERSION);
cairo_move_to (cr,10, 0.2* YOFFSET);
cairo_show_text(cr, string_buf);
cairo_stroke(cr);
for(m = 0; m < X_DIV+1;m ++)
{
x = m * XMAX / X_DIV + XOFFSET;
if( (x >= XOFFSET) && (x <= XOFFSET+XMAX) )
{
cairo_move_to(cr,x,YOFFSET);
cairo_line_to(cr,x,YMAX+YOFFSET);
}
}
for(m = 0; m < Y_DIV+1;m ++)
{
y = m * YMAX / Y_DIV + YOFFSET;
cairo_move_to(cr,XOFFSET,y);
cairo_line_to (cr,XMAX+XOFFSET,y);
}
cairo_stroke(cr);
for(o = 0; o < 16;o ++)
{
sprintf(string_buf,"D%1i",o);
cairo_move_to (cr,0, y_zero - o * y_scale);
cairo_show_text(cr, string_buf);
}
// cairo_stroke(cr);
cairo_set_source_rgb(cr, 0.0, 0.0, 1.0);
for(o = 0;o <8; o++)
{
ptr = data->buffer;
n = *data->length;
ptr = ptr + 10; //real data begins with offset + 10
n = (n - 10)/2; //LA data are splited in to byte, LSB/MSB
p = (int) pow(2,o);
if (*ptr & p) {
A = 0.9 * y_scale;
}
else {
A = 0;
}
x_alt = x_zero;
y_alt = y_zero - o * y_scale - A;
if(x_alt < XOFFSET)
x_alt = XOFFSET;
else
if(x_alt > (XOFFSET+XMAX) )
x_alt = XOFFSET+YMAX;
if(y_alt < YOFFSET)
y_alt = YOFFSET;
else
if(y_alt > (YOFFSET+YMAX) )
y_alt = YOFFSET+YMAX;
ptr++;
ptr++;
for(m = 1; m <= n-1; m ++) {
if (*ptr & p) {
A = 0.9 * y_scale;
}
else {
A = 0;
}
x = x_zero + m * x_scale;
y = y_zero - o * y_scale - A;
ptr++;
ptr++;
if(x < XOFFSET)
x = XOFFSET;
else
if(x > (XOFFSET+XMAX) )
x = XOFFSET+YMAX;
if(y < YOFFSET)
y = YOFFSET;
else
if(y > (YOFFSET+YMAX) )
y = YOFFSET+YMAX;
cairo_move_to(cr,x_alt,y_alt);
cairo_line_to (cr,x,y);
x_alt = x;
y_alt = y;
}
cairo_stroke(cr);
}
y_zero = YOFFSET + YMAX / 2.0;
for(o = 0;o <8; o++)
{
ptr = data->buffer;
n = *data->length;
ptr = ptr + 11; //real data begins with offset + 10 + MSB
n = (n - 10)/2; //LA data are splited in to byte, LSB/MSB
p = (int) pow(2,o);
if (*ptr & p) {
A = 0.9 * y_scale;
}
else {
A = 0;
}
x_alt = x_zero;
y_alt = y_zero - o * y_scale - A;
if(x_alt < XOFFSET)
x_alt = XOFFSET;
else
if(x_alt > (XOFFSET+XMAX) )
x_alt = XOFFSET+YMAX;
if(y_alt < YOFFSET)
y_alt = YOFFSET;
else
if(y_alt > (YOFFSET+YMAX) )
y_alt = YOFFSET+YMAX;