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Author: JSwelland

Examples/Oscilloscopes/MidrangeScopes/src/SaveHardcopyExample/save_hardcopy_c++.c

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+//-------------------------------------------------------------------------------
+// Name:  Save Hardcopy with C++ using VISA for 2/3/4/5/6 Series Scopes
+// Purpose : This example demonstrates how to save a hard copy screen image from
+//   the scope to the PC.
+//
+// Created:  10/4/2023
+//
+// Compatible Instruments : 2/3/4/5/6 Series Riddick Based Oscilloscopes
+//
+// Compatible Interfaces : USB, Ethernet, GPIB
+//
+// Tektronix provides the following example "AS IS" with no support or warranty.
+//
+//-------------------------------------------------------------------------------
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <visa.h>
+
+int main() {
+
+	ViStatus  status;
+	ViSession defaultRM, instr;
+	ViUInt32 retCount;
+	ViChar buffer[80000];
+
+	// Modify the following line to configure this script for your instrument
+	char resourceString[] = "TCPIP::10.233.70.92::INSTR";
+	ViBuf scpi;
+
+	// Where to save (PC side)
+	char target_path[] = "C:\\tempx\\";
+	char target_name[] = "scope_screenshot.png";
+	char full_path[256];
+
+	// Initialize VISA session
+	status = viOpenDefaultRM(&defaultRM);;
+	if (status < VI_SUCCESS) {
+		printf("Failed to initialize\n");
+		return -1;
+	}
+
+	// Open instrument connection
+	status = viOpen(defaultRM, resourceString, VI_NULL, VI_NULL, &instr);
+	if (status < VI_SUCCESS) {
+		printf("Error connecting to instrument\n");
+		viStatusDesc(defaultRM, status, buffer);
+		printf("%s\n", buffer);
+		return 0;
+	}
+
+	// Set timeout
+	status = viSetAttribute(instr, VI_ATTR_TMO_VALUE, 10000);
+
+	// Configure scope for screenshot, see programmers manual for scope-specific syntax
+	// Setting where to save screenshot on scope
+	scpi = "SAVE:IMAGE \"C:\\screenshots\\tek.png\"\n";
+	status = viWrite(instr, scpi, (ViUInt32)strlen(scpi), &retCount);
+	if (status < VI_SUCCESS) {
+		printf("Error writing to instrument\n");
+		viStatusDesc(defaultRM, status, buffer);
+		printf("%s\n", buffer);
+		return 0;
+	}
+
+	// Transfer screenshot to PC
+	status = viWrite(instr, "FILESystem:READFile \"C:\\screenshots\\tek.png\"\n", 45, &retCount);
+	if (status < VI_SUCCESS) {
+		printf("Error writing to instrument\n");
+		viStatusDesc(defaultRM, status, buffer);
+		printf("%s\n", buffer);
+		return 0;
+	}
+	status = viRead(instr, buffer, sizeof(buffer), &retCount);
+	if (status < VI_SUCCESS) {
+		printf("Error reading from instrument\n");
+		viStatusDesc(defaultRM, status, buffer);
+		printf("%s\n", buffer);
+		return 0;
+	}
+
+	snprintf(full_path, sizeof(full_path), "%s%s", target_path, target_name);
+	FILE* file = fopen(full_path, "wb");
+	if (file == NULL) {
+		printf("Failed to open file for writing.\n");
+		return -1;
+	}
+
+	size_t bytesWritten = fwrite(buffer, 1, retCount, file);
+
+	// Check if the write operation was successful
+	if (bytesWritten != buffer) {
+		perror("Error writing to the file");
+		fclose(file);
+		return 1; // Exit with an error code
+	}
+
+	fclose(file);
+
+	viClose(instr);
+	viClose(defaultRM);
+	return 0;
+}