From 33f0c9ae9bf23080051ea491ed16743fb2e526e6 Mon Sep 17 00:00:00 2001
From: Jean THOMAS <git0@pub.jeanthomas.me>
Date: Wed, 24 Jun 2020 10:34:39 +0200
Subject: [PATCH] Ensure we have at least one master

---
 gram/core/crossbar.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gram/core/crossbar.py b/gram/core/crossbar.py
index 70d2afb..66301a3 100644
--- a/gram/core/crossbar.py
+++ b/gram/core/crossbar.py
@@ -133,6 +133,7 @@ class gramCrossbar(Elaboratable):
 
         controller = self.controller
         nmasters = len(self.masters)
+        assert nmasters > 0
 
         # Address mapping --------------------------------------------------------------------------
         cba_shifts = {
-- 
2.30.2