Initial commit of files

SoftwareDefined/HackRF/hackrf-2015.07.2/firmware/tools/check_clock.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+
+# Copyright 2013 Jared Boone
+#
+# Interpret the LPC43xx Clock Generation Unit (CGU) FREQ_MON register
+# and display the estimated clock frequency.
+#
+# This file is part of HackRF.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+"""
+Inside GDB:
+	(gdb) set {int}0x40050014 = 0x09800000
+	(gdb) x 0x40050014
+	0x40050014:     0x091bd000
+This script:
+	./check_clock.py 0x<register value> 0x<RCNT initial value>
+"""
+
+import sys
+
+clock_source_names = {
+	0x00: '32 kHz oscillator',
+	0x01: 'IRC',
+	0x02: 'ENET_RX_CLK',
+	0x03: 'ENET_TX_CLK',
+	0x04: 'GP_CLKIN',
+	0x06: 'Crystal oscillator',
+	0x07: 'PLL0USB',
+	0x08: 'PLL0AUDIO',
+	0x09: 'PLL1',
+	0x0c: 'IDIVA',
+	0x0d: 'IDIVB',
+	0x0e: 'IDIVC',
+	0x0f: 'IDIVD',
+	0x10: 'IDIVE',
+}
+
+reg_value = int(sys.argv[1], 16)
+rcnt = int(sys.argv[2], 16)
+
+print('0x%08x' % reg_value)
+
+rcnt_final = reg_value & 0x1ff
+fcnt = (reg_value >> 9) & 0x3fff
+clock_source = (reg_value >> 24) & 0x1f
+fref = 12e6
+
+if rcnt_final != 0:
+	raise RuntimeError('RCNT did not reach 0')
+
+print('RCNT: %d' % rcnt)
+print('FCNT: %d' % fcnt)
+print('Fref: %d' % fref)
+
+clock_hz = fcnt / float(rcnt) * fref
+clock_mhz = clock_hz / 1e6
+clock_name = clock_source_names[clock_source] if clock_source in clock_source_names else 'Reserved'
+print('%s: %.3f MHz' % (clock_name, clock_mhz))