- use correct SCAN_N check value (disabled by default)

[fw/openocd] / src / target / arm_jtag.c

diff --git a/src/target/arm_jtag.c b/src/target/arm_jtag.c
index 3bb8a32feba519b02b69ae1e13b0ff84a86155f4..edc1bd8804f4ae98faef32b548c2661a3590536e 100644 (file)
--- a/src/target/arm_jtag.c
+++ b/src/target/arm_jtag.c
@@ -29,7 +29,18 @@
 
 #include <stdlib.h>
 
-int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr)
+#if 0
+#define _ARM_JTAG_SCAN_N_CHECK_
+#endif
+
+int arm_jtag_set_instr_error_handler(u8 *in_value, void *priv)
+{
+       ERROR("setting the new JTAG instruction failed, debugging is likely to be broken");
+       
+       return ERROR_OK;
+}
+
+int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr, error_handler_t *caller_error_handler)
 {
        jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
        
@@ -48,7 +59,21 @@ int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr)
                field.in_handler = NULL;
                field.in_handler_priv = NULL;
                
-               jtag_add_ir_scan(1, &field, -1);
+               
+               
+               if (caller_error_handler)
+               {
+                       jtag_set_check_value(&field, NULL, NULL, caller_error_handler);
+               }
+               else
+               {
+                       error_handler_t error_handler;
+                       error_handler.error_handler = arm_jtag_set_instr_error_handler;
+                       error_handler.error_handler_priv = NULL;
+                       jtag_set_check_value(&field, NULL, NULL, &error_handler);
+               }
+               jtag_add_ir_scan(1, &field, -1, NULL);
+               
                
                free(field.out_value);
        }
@@ -60,6 +85,9 @@ int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
 {
        if(jtag_info->cur_scan_chain != new_scan_chain)
        {
+#ifdef _ARM_JTAG_SCAN_N_CHECK_
+               u8 scan_n_check_value = 1 << (jtag_info->scann_size - 1);
+#endif
                scan_field_t field;
                
                field.device = jtag_info->chain_pos;
@@ -67,15 +95,17 @@ int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
                field.out_value = calloc(CEIL(field.num_bits, 8), 1);
                buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
                field.out_mask = NULL;
-               //field.in_value = &scan_n_capture;
                field.in_value = NULL;
-               field.in_check_value = NULL;
-               field.in_check_mask = NULL;
+#ifdef _ARM_JTAG_SCAN_N_CHECK_
+               jtag_set_check_value(&field, &scan_n_check_value, NULL, NULL, NULL);
+#else
                field.in_handler = NULL;
                field.in_handler_priv = NULL;
+#endif 
+               
                
-               arm_jtag_set_instr(jtag_info, jtag_info->scann_instr);
-               jtag_add_dr_scan(1, &field, -1);
+               arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL);
+               jtag_add_dr_scan(1, &field, -1, NULL);
                
                jtag_info->cur_scan_chain = new_scan_chain;