From 8671410a0f9bdd4b405762ad4790c15d601b0fba Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Fri, 28 Aug 2026 13:42:10 -0700
Subject: online crossbar inputs

---
 src/crossbar_generator.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

(limited to 'src/crossbar_generator.c')

diff --git a/src/crossbar_generator.c b/src/crossbar_generator.c
index 4e0b935..4bf6746 100644
--- a/src/crossbar_generator.c
+++ b/src/crossbar_generator.c
@@ -86,6 +86,19 @@ static int write_input_series(FILE *file, const Crossbar_Config *config)
 	return ferror(file) ? -1 : 0;
 }
 
+static int write_external_inputs(FILE *file, const Crossbar_Config *config)
+{
+	if (fprintf(file, "\n* Online SPIRES reservoir states\n") < 0)
+		return -1;
+
+	for (size_t row = 0; row < config->rows; row++) {
+		if (fprintf(file, "VROW%zu row%zu 0 dc 0 external\n", row,
+			    row) < 0)
+			return -1;
+	}
+	return 0;
+}
+
 static int write_memristor_array(FILE *file, const Crossbar_Config *config)
 {
 	if (fprintf(file, "\n* Memristor Array\n") < 0) {
@@ -201,3 +214,40 @@ int generate_crossbar(const char *output_filename,
 	}
 	return 0;
 }
+
+int generate_online_crossbar(const char *output_filename,
+			     const Crossbar_Config *config)
+{
+	if (validate_config(config) < 0) {
+		fprintf(stderr, "invalid config");
+		return -1;
+	}
+
+	FILE *file = fopen(output_filename, "w");
+	if (file == NULL) {
+		fprintf(stderr, "could not create online crossbar file");
+		return -1;
+	}
+
+	if (write_header(file, config) != 0 ||
+	    write_external_inputs(file, config) != 0 ||
+	    write_memristor_array(file, config) != 0 ||
+	    write_column_loads(file, config) != 0 ||
+	    fprintf(file, "\n* Online simulation\n.tran %.17g %.17g uic\n",
+		    config->time_step, config->stop_time) < 0 ||
+	    fprintf(file, ".save time") < 0) {
+		fclose(file);
+		return -1;
+	}
+
+	for (size_t column = 0; column < config->columns; column++) {
+		if (fprintf(file, " v(col%zu)", column) < 0) {
+			fclose(file);
+			return -1;
+		}
+	}
+
+	if (fprintf(file, "\n.end\n") < 0 || fclose(file) != 0)
+		return -1;
+	return 0;
+}
-- 
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