From 6c8a5ae62d740c2ca0e43f985b556453911b0880 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@sage.physik.uni-augsburg.de>
Date: Mon, 28 Mar 2011 13:33:48 +0200
Subject: [PATCH] implemented set ir stuff

---
 jtag.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/jtag.c b/jtag.c
index 2497cf7..9d05d5f 100644
--- a/jtag.c
+++ b/jtag.c
@@ -1,6 +1,7 @@
 /*
  * jtag.c - basic jtag stuff (good excercise!)
  *
+ * build: gcc -Wall jtag.c -o jtag
  * author: hackbard@hackdaworld.org
  *
  */
@@ -164,12 +165,15 @@ int jtag_read_data(u8 *p,int bitlen) {
 	memset(p,0,bitlen+7/8);
 	count=0;
 
+	printf("  <- ");
 	while(bitlen) {
 		in=jtag_clock(0,0);
 		p[count/8]|=((in&1)<<(count%8));
+		printf("%d",p[count/8]&(1<<(count%8))?1:0);
 		count+=1;
 		bitlen-=1;
 	}
+	printf("\n");
 
 	return 0;
 
@@ -181,11 +185,14 @@ int jtag_write_data(u8 *p,int bitlen) {
 
 	count=0;
 
+	printf("  -> ");
 	while(bitlen) {
-		jtag_clock(0,p[count/8]&(1<<count)?1:0);
+		jtag_clock(0,p[count/8]&(1<<(count%8))?1:0);
+		printf("%d",p[count/8]&(1<<(count%8))?1:0);
 		bitlen-=1;
 		count+=1;
 	}
+	printf("\n");
 
 	return 0;
 
@@ -239,18 +246,20 @@ int jtag_set_ir(char *s,int bitlen) {
 	}
 
 	memset(ir,0,MAXDEV*MAXIRLEN/8*sizeof(u8));
+	count=0;
 
-	printf("ir to set: ");
+	printf("set ir: ");
 	while(bitlen) {
-		ir[count/8]|=(s[count]<<(count%8));
-		printf("%d",ir[count/8]&(1<<count%8)?1:0);
+		if(s[count]=='1')
+			ir[count/8]|=(1<<(count%8));
+		printf("%d",ir[count/8]&(1<<(count%8))?1:0);
 		count+=1;
 		bitlen-=1;
 	}
 	printf("\n");
 
 	jtag_enter_shift_ir();
-	jtag_write_data(ir,bitlen);
+	jtag_write_data(ir,count);
 	jtag_leave_shift_ir();
 
 	return 0;
@@ -261,7 +270,6 @@ int main(int argc,char **argv) {
 
 	t_jtag jtag;
 	u8 io[256];
-	int i;
 
 	memset(&jtag,0,sizeof(t_jtag));
 
@@ -281,10 +289,6 @@ int main(int argc,char **argv) {
 	jtag_set_ir("000001000001",12);
 	jtag_enter_shift_dr();
 	jtag_read_data(io,64);
-	for(i=0;i<64;i++) {
-		printf("%d",io[i/8]&(1<<(i%8))?1:0);
-	}
-	printf("\n");
 	jtag_leave_shift_dr();
 
 	return 0;
-- 
2.20.1