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

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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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/calypso-jtag/with-reset.cfg	Sun Jun 23 01:08:01 2019 +0000
@@ -0,0 +1,61 @@
+# The Calypso target is connected to an unbuffered FT2232D adapter
+# acting as the JTAG interface following Mother Mychaela's method,
+# ADBUS7 is wired to the reset pin on TI's 14-pin connector.
+#
+# This config is an attempt (unsuccessful) to get OpenOCD's reset
+# infrastructure (including reset halt) to work with the very different
+# way of doing things on the Calypso.
+
+interface ftdi
+ftdi_vid_pid 0x0403 0x7151
+
+ftdi_layout_init 0x0088 0x008b
+ftdi_layout_signal XDS_RESET -data 0x0080 -oe 0x0080
+
+transport select jtag
+adapter_khz 6000
+
+# Reset like the one produced by TI's original XDS510/560 adapters
+proc init_reset { mode } {
+	ftdi_set_signal XDS_RESET 0
+	sleep 50
+	ftdi_set_signal XDS_RESET 1
+	sleep 10
+	jtag arp_init
+}
+
+if { [info exists CHIPNAME] } {
+	set  _CHIPNAME $CHIPNAME
+} else {
+	set  _CHIPNAME calypso
+}
+
+if { [info exists CPUTAPID] } {
+	set _CPUTAPID $CPUTAPID
+} else {
+	set _CPUTAPID 0x3100e02f
+}
+
+jtag newtap $_CHIPNAME dsp -irlen 8
+jtag newtap $_CHIPNAME arm -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.arm
+target create $_TARGETNAME arm7tdmi -endian little -chain-position $_TARGETNAME
+
+arm7_9 dbgrq enable
+
+proc calypso_magic {} {
+	irscan calypso.arm 0x0b -endstate DRPAUSE
+	drscan calypso.arm 2 2 -endstate RUN/IDLE
+}
+
+# watchdog disable with minimal finger strokes to make it in time
+proc wd {} {
+	calypso.arm mwh 0xFFFFF804 0xF5
+	calypso.arm mwh 0xFFFFF804 0xA0
+}
+
+$_TARGETNAME configure -event examine-start calypso_magic
+
+# deliberately empty procedure here, as init_reset already did the job
+$_TARGETNAME configure -event reset-assert { }