basically working set_ir stuff (untested!)

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

diff --git a/jtag.c b/jtag.c
index ca2e683..2497cf7 100644 (file)
--- a/jtag.c
+++ b/jtag.c
@@ -175,6 +175,22 @@ int jtag_read_data(u8 *p,int bitlen) {
 
 }
 
+int jtag_write_data(u8 *p,int bitlen) {
+
+       int count;
+
+       count=0;
+
+       while(bitlen) {
+               jtag_clock(0,p[count/8]&(1<<count)?1:0);
+               bitlen-=1;
+               count+=1;
+       }
+
+       return 0;
+
+}
+
 int jtag_chain_init(t_jtag *jtag) {
 
        int i;
@@ -212,9 +228,40 @@ int jtag_chain_init(t_jtag *jtag) {
 
 }
 
+int jtag_set_ir(char *s,int bitlen) {
+
+       u8 ir[MAXDEV*MAXIRLEN/8];
+       int count;
+
+       if(bitlen>=MAXDEV*MAXIRLEN) {
+               printf("instruction register too big!\n");
+               return -1;
+       }
+
+       memset(ir,0,MAXDEV*MAXIRLEN/8*sizeof(u8));
+
+       printf("ir to set: ");
+       while(bitlen) {
+               ir[count/8]|=(s[count]<<(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_leave_shift_ir();
+
+       return 0;
+
+}
+
 int main(int argc,char **argv) {
 
        t_jtag jtag;
+       u8 io[256];
+       int i;
 
        memset(&jtag,0,sizeof(t_jtag));
 
@@ -230,6 +277,16 @@ 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);
+       for(i=0;i<64;i++) {
+               printf("%d",io[i/8]&(1<<(i%8))?1:0);
+       }
+       printf("\n");
+       jtag_leave_shift_dr();
+
        return 0;
 
 }