diff options
Diffstat (limited to 'src/jtag/jtag.h')
| -rw-r--r-- | src/jtag/jtag.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h index 99ed9395..e9caf984 100644 --- a/src/jtag/jtag.h +++ b/src/jtag/jtag.h @@ -308,12 +308,29 @@ extern int jtag_register_commands(struct command_context_s* cmd_ctx); * end state and a subsequent jtag_add_pathmove() must be issued. */ +/** + * Generate an IR SCAN with a list of scan fields with one entry for + * each enabled TAP. + * + * If the input field list contains an instruction value for a TAP then + * that is used otherwise the TAP is set to bypass. + * + * TAPs for which no fields are passed are marked as bypassed for + * subsequent DR SCANs. + * + */ extern void jtag_add_ir_scan(int num_fields, scan_field_t* fields, tap_state_t endstate); /** * The same as jtag_add_ir_scan except no verification is performed out * the output values. */ extern void jtag_add_ir_scan_noverify(int num_fields, const scan_field_t *fields, tap_state_t state); +/** + * Duplicate the scan fields passed into the function into an IR SCAN + * command. This function assumes that the caller handles extra fields + * for bypassed TAPs. + */ +extern void jtag_add_plain_ir_scan(int num_fields, const scan_field_t* fields, tap_state_t endstate); /** @@ -327,10 +344,20 @@ extern void jtag_add_ir_scan_noverify(int num_fields, const scan_field_t *fields */ extern void jtag_alloc_in_value32(scan_field_t *field); +/** + * Generate a DR SCAN using the fields passed to the function. + * For connected TAPs, the function checks in_fields and uses fields + * specified there. For bypassed TAPs, the function generates a dummy + * 1-bit field. The bypass status of TAPs is set by jtag_add_ir_scan(). + */ extern void jtag_add_dr_scan(int num_fields, const scan_field_t* fields, tap_state_t endstate); /// A version of jtag_add_dr_scan() that uses the check_value/mask fields extern void jtag_add_dr_scan_check(int num_fields, scan_field_t* fields, tap_state_t endstate); -extern void jtag_add_plain_ir_scan(int num_fields, const scan_field_t* fields, tap_state_t endstate); +/** + * Duplicate the scan fields passed into the function into a DR SCAN + * command. Unlike jtag_add_dr_scan(), this function assumes that the + * caller handles extra fields for bypassed TAPs. + */ extern void jtag_add_plain_dr_scan(int num_fields, const scan_field_t* fields, tap_state_t endstate); |