From 3bf683fcddd3e4044606e2c7b7ebfb4501b47130 Mon Sep 17 00:00:00 2001
From: ian <ian>
Date: Fri, 13 Jan 2006 22:11:36 +0000
Subject: [PATCH] attempt at service mode

---
 hostside/README         |  1 +
 hostside/nmra-packets.h | 15 +++++++++++++++
 hostside/program-cv-svc | 28 ++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100755 hostside/program-cv-svc

diff --git a/hostside/README b/hostside/README
index 2c504bd..bf67f48 100644
--- a/hostside/README
+++ b/hostside/README
@@ -7,6 +7,7 @@
   -w<repeatdelay>  usleep; 0 = no usleep; default is -1 = don't repeat at all
   -i<iterations>   default is 0 = infinite; -1 means don't repeat
                       *** the above seems wrong; -1 seems to mean infinite
+			*** and 0 means once ?!
   -f<fudgedelay>   usleep; each character; default is 0 = no usleep
 
 Eg,
diff --git a/hostside/nmra-packets.h b/hostside/nmra-packets.h
index ac18869..6f35abb 100644
--- a/hostside/nmra-packets.h
+++ b/hostside/nmra-packets.h
@@ -74,6 +74,21 @@ NMRA(cvwrite, Aint(addr,0) Aint(cv,1) Abyte(value,2), {
   *c++= value;
 })
 
+/*
+ * Service mode.
+ */
+NMRA(svc_cvwrite, Aint(cv,0) Abyte(value,1), {
+  /* Service Mode Instruction for Direct Mode, Write Byte
+   * RP 9.2.3 E l.107-
+   */
+  int adj;
+  nmra_errchk(cn, cv, cv>=1 && cv<=1024);
+  adj= cv - 1;
+  *c++= 0x7c | (adj >> 8);
+  *c++= adj;
+  *c++= value;
+})
+     
 #undef Aint
 #undef Abitmap
 #undef Abyte
diff --git a/hostside/program-cv-svc b/hostside/program-cv-svc
new file mode 100755
index 0000000..0e2f631
--- /dev/null
+++ b/hostside/program-cv-svc
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -e
+
+if [ $# != 3 ]; then cat >&2 <<END; exit 1; fi
+ usage:
+  ./program-cv /dev/ttyS0 CV VALUE
+ where CV, VALUE are all decimal unless prefixed by 0x or 0.
+END
+
+port="$1"; shift
+cv="$1"; shift
+value="$1"; shift
+
+ho () { ./hostside-old -s"$port" -w20000 -i0 -d "$@"; }
+
+# Packet Sequence for Command Stations/Programmers using Direct Mode
+# RP 9.2.3 E l.100-
+
+ho command 10
+sleep 1
+ho command 11
+sleep 1
+ho -i10 reset
+sleep 1
+ho -i10 svc_cvwrite "$cv" "$value"
+sleep 1
+ho command 10
-- 
2.30.2