jtag

commit 7f2bdfd0d2565d179bc373474b8fe5ee84bee876
parent bb321970a561074141ef5dc59bdb7a8756e212bc
Author: Brian Swetland <swetland@frotz.net>
Date:   Fri,  2 Mar 2012 22:06:59 -0800

jconsole: simple rx-only uart transport

Diffstat:
M
Makefile
 | 
9
+++++++--
A
jconsole.c
 | 
34
++++++++++++++++++++++++++++++++++

2 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
@@ -2,10 +2,11 @@
 CFLAGS := -g -Wall
 LIBS := -lusb-1.0
 
-all: jload jinfo
+all: jload jinfo jconsole
 
 jinfo.c: jtag.h
 jload.c: jtag.h
+jconsole.c: jtag.h
 jtag.c: jtag.h
 jtag-virtual.c: jtag.h
 
@@ -17,5 +18,9 @@ JINFO_OBJS := jinfo.o jtag-virtual.o jtag.o
 jinfo: $(JINFO_OBJS)
 	$(CC) -o jinfo $(JINFO_OBJS) $(LIBS)
 
+JCONSOLE_OBJS := jconsole.o jtag-virtual.o jtag.o
+jconsole: $(JCONSOLE_OBJS)
+	$(CC) -o jconsole $(JCONSOLE_OBJS) $(LIBS)
+
 clean::
-	rm -f jload jinfo *.o
+	rm -f jload jinfo jconsole *.o
diff --git a/jconsole.c b/jconsole.c
@@ -0,0 +1,34 @@
+// Copyright 2012, Brian Swetland
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "jtag.h"
+
+#define VIR_CTRL	0x0
+#define VIR_ADDR	0x1
+#define VIR_DATA	0x2
+#define VIR_UART	0x3
+
+int main(int argc, char **argv) {
+	unsigned bits;
+
+	if (jtag_open_virtual_device(0x00))
+		return -1;
+
+	jtag_vir(VIR_UART);
+
+	for (;;) {
+		jtag_vdr(9, 0, &bits);
+		if (bits & 0x100) {
+			bits &= 0xFF;
+			if ((bits < ' ') || (bits > 127))
+				fputc('.', stderr);
+			else
+				fputc(bits, stderr);
+		}
+	}
+
+	return 0;
+}
+