From: ian <ian>
Date: Sat, 10 Dec 2005 01:02:24 +0000 (+0000)
Subject: implement crash readout protocol at least enough to talk to a slave
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ijackson/git?a=commitdiff_plain;h=2cbd1ee211a4326f6981392e75b4412454f13c18;p=trains.git

implement crash readout protocol at least enough to talk to a slave
---

diff --git a/detpic/test-sofar.asm b/detpic/test-sofar.asm
index e1feab4..319e721 100644
--- a/detpic/test-sofar.asm
+++ b/detpic/test-sofar.asm
@@ -33,7 +33,7 @@
 ;		if first byte of buffer _is_ negative:
 ;		 i2cm_read_start (buffer empty)
 ;
-;	0x00	do not send this
+;	0x00	ignored
 ;
 ;	0x80-ff	make buffer consisting of only that byte
 ;		 (ie, clear top bit, store at start of buffer,
@@ -187,8 +187,9 @@ m_ch_setonemsg
 	mov_lfsr 0x200,0
 	mov_fw	ch
 	and_lw	0x7f
-	mov_fw	POSTINC0
+	mov_wf	POSTINC0
 	clr_f	INDF0
+m_ch_ignore
 	return
 
 ;----------
@@ -197,8 +198,10 @@ m_ch_bad
 
 ;----------
 m_ch_setreadnext
-	mov_ff	ch, readnext_counter
-	return
+	mov_fw	ch
+	bra_z	m_ch_ignore
+	mov_wf	readnext_counter
+	bra	m_ch_spc
 
 ;----------
 m_ch_comma