I've been thinking about whether some helper fn's to
use 32 bit arrays instead of 8 bit input/output might make sense.
The following code is using u8 arrays:
scan_field_t fields[2];
u32 instruction;
u8 instruction_buf = instruction;
buf_set_u32(out_buf, 0, 32, flip_u32(out, 32));
fields[0].tap = jtag_info->tap;
fields[0].num_bits = 1;
fields[0].out_value = &instruction_buf;
fields[0].in_value = NULL;
fields[1].tap = jtag_info->tap;
fields[1].num_bits = 32;
fields[1].out_value = out_buf;
fields[1].in_value = NULL;
jtag_add_dr_scan(2, fields, TAP_INVALID);
32 bit version:
scan_field_t32 fields[2];
fields[0].num_bits = 1;
fields[0].out_value = &instruction;
fields[0].in_value = NULL;
fields[1].num_bits = 32;
u32 tmp2=flip_u32(out, 32)
fields[1].out_value = tmp2;
fields[1].in_value = NULL;
/* this API supports only a single tap, which covers all(?)
jtag_add_dr_scan()'s today. */
jtag_add_dr_scan32(jtag_info->tap, 2, fields, TAP_INVALID);
The second one here is a little bit more straightforward... No
mysterious messing about u8 arrays....
--
Øyvind Harboe
Embedded software and hardware consulting services
http://consulting.zylin.com
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