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comparison calypso-jtag/with-reset.cfg @ 61:3940292ad76f

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calypso-jtag: finally got some breakthrough
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Jun 2019 01:08:01 +0000
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60:f362a4c18f6f 61:3940292ad76f
1 # The Calypso target is connected to an unbuffered FT2232D adapter
2 # acting as the JTAG interface following Mother Mychaela's method,
3 # ADBUS7 is wired to the reset pin on TI's 14-pin connector.
4 #
5 # This config is an attempt (unsuccessful) to get OpenOCD's reset
6 # infrastructure (including reset halt) to work with the very different
7 # way of doing things on the Calypso.
8
9 interface ftdi
10 ftdi_vid_pid 0x0403 0x7151
11
12 ftdi_layout_init 0x0088 0x008b
13 ftdi_layout_signal XDS_RESET -data 0x0080 -oe 0x0080
14
15 transport select jtag
16 adapter_khz 6000
17
18 # Reset like the one produced by TI's original XDS510/560 adapters
19 proc init_reset { mode } {
20 ftdi_set_signal XDS_RESET 0
21 sleep 50
22 ftdi_set_signal XDS_RESET 1
23 sleep 10
24 jtag arp_init
25 }
26
27 if { [info exists CHIPNAME] } {
28 set _CHIPNAME $CHIPNAME
29 } else {
30 set _CHIPNAME calypso
31 }
32
33 if { [info exists CPUTAPID] } {
34 set _CPUTAPID $CPUTAPID
35 } else {
36 set _CPUTAPID 0x3100e02f
37 }
38
39 jtag newtap $_CHIPNAME dsp -irlen 8
40 jtag newtap $_CHIPNAME arm -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
41
42 set _TARGETNAME $_CHIPNAME.arm
43 target create $_TARGETNAME arm7tdmi -endian little -chain-position $_TARGETNAME
44
45 arm7_9 dbgrq enable
46
47 proc calypso_magic {} {
48 irscan calypso.arm 0x0b -endstate DRPAUSE
49 drscan calypso.arm 2 2 -endstate RUN/IDLE
50 }
51
52 # watchdog disable with minimal finger strokes to make it in time
53 proc wd {} {
54 calypso.arm mwh 0xFFFFF804 0xF5
55 calypso.arm mwh 0xFFFFF804 0xA0
56 }
57
58 $_TARGETNAME configure -event examine-start calypso_magic
59
60 # deliberately empty procedure here, as init_reset already did the job
61 $_TARGETNAME configure -event reset-assert { }