1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
# SPDX-License-Identifier: GPL-2.0-or-later
# script for Cypress PSoC 4 devices
#
# PSoC 4 devices support SWD transports only.
#
source [find target/swj-dp.tcl]
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME psoc4
}
# Work-area is a space in RAM used for flash programming
# By default use 4kB
if { [info exists WORKAREASIZE] } {
set _WORKAREASIZE $WORKAREASIZE
} else {
set _WORKAREASIZE 0x1000
}
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x0bb11477
}
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -dap $_CHIPNAME.dap
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME psoc4 0 0 0 0 $_TARGETNAME
adapter speed 1500
# Reset, bloody PSoC 4 reset
#
# 1) XRES (nSRST) resets also SWD DP so SWD line reset and DP reinit is needed.
# High level adapter stops working after SRST and needs OpenOCD restart.
# If your hw does not use SRST for other circuits, use sysresetreq instead
#
# 2) PSoC 4 executes initialization code from system ROM after reset.
# This code subsequently jumps to user flash reset vector address.
# Unfortunately the system ROM code is protected from reading and debugging.
# Protection breaks vector catch VC_CORERESET used for "reset halt" by cortex_m.
#
# Cypress uses TEST_MODE flag to loop CPU in system ROM before executing code
# from user flash. Programming specifications states that TEST_MODE flag must be
# set in time frame 400 usec delayed about 1 msec from reset.
#
# OpenOCD have no standard way how to set TEST_MODE in specified time frame.
# As a workaround the TEST_MODE flag is set before reset instead.
# It worked for the oldest family PSoC4100/4200 even though it is not guaranteed
# by specification.
#
# Newer families like PSoC 4000, 4100M, 4200M, 4100L, 4200L and PSoC 4 BLE
# clear TEST_MODE flag during device reset so workaround is not possible.
# Use a KitProg adapter for these devices or "reset halt" will not stop
# before executing user code.
#
# 3) SWD cannot be connected during system initialization after reset.
# This might be a reason for unconnecting ST-Link v2 when deasserting reset.
# As a workaround arp_reset deassert is not called for hla
if {![using_hla]} {
# if srst is not fitted use SYSRESETREQ to
# perform a soft reset
cortex_m reset_config sysresetreq
}
proc psoc4_get_family_id {} {
set err [catch {set romtable_pid [read_memory 0xF0000FE0 32 3]}]
if { $err } {
return 0
}
if { [expr {[lindex $romtable_pid 0] & 0xffffff00 }]
|| [expr {[lindex $romtable_pid 1] & 0xffffff00 }]
|| [expr {[lindex $romtable_pid 2] & 0xffffff00 }] } {
echo "Unexpected data in ROMTABLE"
return 0
}
set designer_id [expr {(( [lindex $romtable_pid 1] & 0xf0 ) >> 4) | (( [lindex $romtable_pid 2] & 0xf ) << 4 ) }]
if { $designer_id != 0xb4 } {
echo [format "ROMTABLE Designer ID 0x%02x is not Cypress" $designer_id]
return 0
}
set family_id [expr {( [lindex $romtable_pid 0] & 0xff ) | (( [lindex $romtable_pid 1] & 0xf ) << 8 ) }]
return $family_id
}
proc ocd_process_reset_inner { MODE } {
global PSOC4_USE_ACQUIRE PSOC4_TEST_MODE_WORKAROUND
global _TARGETNAME
if { 0 != [string compare $_TARGETNAME [target names]] } {
return -code error "PSoC 4 reset can handle only one $_TARGETNAME target";
}
set t $_TARGETNAME
# If this target must be halted...
set halt -1
if { 0 == [string compare $MODE halt] } {
set halt 1
}
if { 0 == [string compare $MODE init] } {
set halt 1;
}
if { 0 == [string compare $MODE run ] } {
set halt 0;
}
if { $halt < 0 } {
return -code error "Invalid mode: $MODE, must be one of: halt, init, or run";
}
if { ! [info exists PSOC4_USE_ACQUIRE] } {
if { 0 == [string compare [adapter name] kitprog ] } {
set PSOC4_USE_ACQUIRE 1
} else {
set PSOC4_USE_ACQUIRE 0
}
}
if { $PSOC4_USE_ACQUIRE } {
set PSOC4_TEST_MODE_WORKAROUND 0
} elseif { ! [info exists PSOC4_TEST_MODE_WORKAROUND] } {
if { [psoc4_get_family_id] == 0x93 } {
set PSOC4_TEST_MODE_WORKAROUND 1
} else {
set PSOC4_TEST_MODE_WORKAROUND 0
}
}
#$t invoke-event reset-start
$t invoke-event reset-assert-pre
if { $halt && $PSOC4_USE_ACQUIRE } {
catch { [adapter name] acquire_psoc }
$t arp_examine
} else {
if { $PSOC4_TEST_MODE_WORKAROUND } {
set TEST_MODE 0x40030014
if { $halt == 1 } {
catch { mww $TEST_MODE 0x80000000 }
} else {
catch { mww $TEST_MODE 0 }
}
}
$t arp_reset assert 0
}
$t invoke-event reset-assert-post
$t invoke-event reset-deassert-pre
if {![using_hla]} { # workaround ST-Link v2 fails and forcing reconnect
$t arp_reset deassert 0
}
$t invoke-event reset-deassert-post
# Pass 1 - Now wait for any halt (requested as part of reset
# assert/deassert) to happen. Ideally it takes effect without
# first executing any instructions.
if { $halt } {
# Now PSoC CPU should loop in system ROM
$t arp_waitstate running 200
$t arp_halt
# Catch, but ignore any errors.
catch { $t arp_waitstate halted 1000 }
# Did we succeed?
set s [$t curstate]
if { 0 != [string compare $s "halted" ] } {
return -code error [format "TARGET: %s - Not halted" $t]
}
# Check if PSoC CPU is stopped in system ROM
set pc [reg pc]
regsub {pc[^:]*: } $pc "" pc
if { $pc < 0x10000000 || $pc > 0x1000ffff } {
set hint ""
set family_id [psoc4_get_family_id]
if { $family_id == 0x93 } {
set hint ", use 'reset_config none'"
} elseif { $family_id > 0x93 } {
set hint ", use a KitProg adapter"
}
return -code error [format "TARGET: %s - Not halted in system ROM%s" $t $hint]
}
# Set registers to reset vector values
set value [read_memory 0x0 32 2]
reg pc [expr {[lindex $value 1] & 0xfffffffe}]
reg msp [lindex $value 0]
if { $PSOC4_TEST_MODE_WORKAROUND } {
catch { mww $TEST_MODE 0 }
}
}
#Pass 2 - if needed "init"
if { 0 == [string compare init $MODE] } {
set err [catch "$t arp_waitstate halted 5000"]
# Did it halt?
if { $err == 0 } {
$t invoke-event reset-init
}
}
$t invoke-event reset-end
}
|
