implemented set ir stuff

[my-code/pnx.git] / jtag.c

diff --git a/jtag.c b/jtag.c
index 2e8298c..9d05d5f 100644 (file)
--- 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;
 
@@ -230,27 +237,31 @@ int jtag_chain_init(t_jtag *jtag) {
 
 int jtag_set_ir(char *s,int bitlen) {
 
-       u8 ir[MAXDEV*MAX_IR_LEN/8];
+       u8 ir[MAXDEV*MAXIRLEN/8];
        int count;
 
-       if(biten>=MAXDEV*MAX_IR_LEN) {
+       if(bitlen>=MAXDEV*MAXIRLEN) {
                printf("instruction register too big!\n");
                return -1;
        }
 
-       memset(ir,0,MAXDEV*MAX_IR_LEN/8*sizeof(u8));
+       memset(ir,0,MAXDEV*MAXIRLEN/8*sizeof(u8));
+       count=0;
 
+       printf("set ir: ");
        while(bitlen) {
-               ir[count/8]|=p[count] ... HIER WEITER ..;
+               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();
-
-       while(len--)
-
+       jtag_write_data(ir,count);
        jtag_leave_shift_ir();
+
        return 0;
 
 }
@@ -258,6 +269,7 @@ int jtag_set_ir(char *s,int bitlen) {
 int main(int argc,char **argv) {
 
        t_jtag jtag;
+       u8 io[256];
 
        memset(&jtag,0,sizeof(t_jtag));
 
@@ -273,6 +285,12 @@ int main(int argc,char **argv) {
        jtag_chain_init(&jtag);
        printf("done\n\n");
 
+       printf("testing some instructions ...\n\n");
+       jtag_set_ir("000001000001",12);
+       jtag_enter_shift_dr();
+       jtag_read_data(io,64);
+       jtag_leave_shift_dr();
+
        return 0;
 
 }