From: Staf Verhaegen <staf@stafverhaegen.be>
Date: Fri, 6 Dec 2019 16:09:26 +0000 (+0100)
Subject: Handle stall signal.
X-Git-Tag: 24jan2021ls180~51
X-Git-Url: https://git.libre-soc.org/?p=c4m-jtag.git;a=commitdiff_plain;h=9d1d3720d89f602851bec554efb2b5881e88a5db;hp=c5a6fc6f8693dab0f4a2354b0f32043f35a1d13c

Handle stall signal.
---

diff --git a/rtl/nmigen/jtag.py b/rtl/nmigen/jtag.py
index 6a1c7ca..a9e04b5 100755
--- a/rtl/nmigen/jtag.py
+++ b/rtl/nmigen/jtag.py
@@ -199,7 +199,8 @@ class JTAGWishbone(Elaboratable):
                     wb.stb.eq(1),
                     wb.we.eq(0),
                 ]
-                m.next = "READACK"
+                with m.If(~wb.stall):
+                    m.next = "READACK"
             with m.State("READACK"):
                 m.d.comb += [
                     wb.cyc.eq(1),
@@ -215,7 +216,8 @@ class JTAGWishbone(Elaboratable):
                     wb.stb.eq(1),
                     wb.we.eq(1),
                 ]
-                m.next = "WRITEREADACK"
+                with m.If(~wb.stall):
+                    m.next = "WRITEREADACK"
             with m.State("WRITEREADACK"):
                 m.d.comb += [
                     wb.cyc.eq(1),