From c86294b1f07624eee3c3749fb877aff96413f17b Mon Sep 17 00:00:00 2001
From: Jon Nordby <jononor@gmail.com>
Date: Wed, 14 May 2025 19:55:05 +0200
Subject: bindings: Actually build cic3_pdm code

---
 bindings/sim_cic3_pdm.cc | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 bindings/sim_cic3_pdm.cc

(limited to 'bindings/sim_cic3_pdm.cc')

diff --git a/bindings/sim_cic3_pdm.cc b/bindings/sim_cic3_pdm.cc
new file mode 100644
index 0000000..e21010b
--- /dev/null
+++ b/bindings/sim_cic3_pdm.cc
@@ -0,0 +1,40 @@
+
+#include <cstdint>
+#include <cstdio>
+
+#include "Vcic3_pdm.h"
+#include "verilated.h"
+
+
+int
+pdm2pcm_cic3(const uint8_t *pdm, int pdm_length, int16_t *pcm, int pcm_length)
+{
+
+    // FIXME: verify that output buffer is large enough
+
+	VerilatedContext *cp = new VerilatedContext;
+
+	Vcic3_pdm *top = new Vcic3_pdm{cp};
+
+    // Start clock off
+	top->clk = 0;
+
+    // Go through all the input data
+    int pcm_sample = 0;
+
+	for (int i = 0; i < pdm_length; i++) {
+
+		top->pdm_in = bool(pdm[i]);
+		top->clk = 1;
+		top->eval();
+
+        if (top->pcm_valid) {
+		    pcm[pcm_sample++] = top->pcm_out;
+        }
+
+		top->clk = 0;
+		top->eval();
+	}
+
+	return pcm_sample;
+}
-- 
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