[libsigrokdecode.git] / decoders / rtc8564 / pd.py

##
## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2012-2014 Uwe Hermann <uwe@hermann-uwe.de>
##
## 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 of the License, 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; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
##

import sigrokdecode as srd

# Return the specified BCD number (max. 8 bits) as integer.
def bcd2int(b):
    return (b & 0x0f) + ((b >> 4) * 10)

class Decoder(srd.Decoder):
    api_version = 1
    id = 'rtc8564'
    name = 'RTC-8564'
    longname = 'Epson RTC-8564 JE/NB'
    desc = 'Realtime clock module protocol.'
    license = 'gplv2+'
    inputs = ['i2c']
    outputs = ['rtc8564']
    probes = []
    optional_probes = [
        {'id': 'clkout', 'name': 'CLKOUT', 'desc': 'Clock output'},
        {'id': 'clkoe', 'name': 'CLKOE', 'desc': 'Clock output enable'},
        {'id': 'int', 'name': 'INT#', 'desc': 'Interrupt'},
    ]
    options = {}
    annotations = \
        [['reg-0x%02x' % i, 'Register 0x%02x' % i] for i in range(8 + 1)] + [
        ['read', 'Read date/time'],
        ['write', 'Write date/time'],
        ['bit-reserved', 'Reserved bit'],
        ['bit-vl', 'VL bit'],
        ['bit-century', 'Century bit'],
        ['reg-read', 'Register read'],
        ['reg-write', 'Register write'],
    ]
    annotation_rows = (
        ('bits', 'Bits', tuple(range(0, 8 + 1)) + (11, 12, 13)),
        ('regs', 'Register access', (14, 15)),
        ('date-time', 'Date/time', (9, 10)),
    )

    def __init__(self, **kwargs):
        self.state = 'IDLE'
        self.hours = -1
        self.minutes = -1
        self.seconds = -1
        self.days = -1
        self.weekdays = -1
        self.months = -1
        self.years = -1
        self.bits = []

    def start(self):
        # self.out_python = self.register(srd.OUTPUT_PYTHON)
        self.out_ann = self.register(srd.OUTPUT_ANN)

    def putx(self, data):
        self.put(self.ss, self.es, self.out_ann, data)

    def putd(self, bit1, bit2, data):
        self.put(self.bits[bit1][1], self.bits[bit2][2], self.out_ann, data)

    def putr(self, bit):
        self.put(self.bits[bit][1], self.bits[bit][2], self.out_ann,
                 [11, ['Reserved bit', 'Reserved', 'Rsvd', 'R']])

    def handle_reg_0x00(self, b): # Control register 1
        pass

    def handle_reg_0x01(self, b): # Control register 2
        ti_tp = 1 if (b & (1 << 4)) else 0
        af = 1 if (b & (1 << 3)) else 0
        tf = 1 if (b & (1 << 2)) else 0
        aie = 1 if (b & (1 << 1)) else 0
        tie = 1 if (b & (1 << 0)) else 0

        ann = ''

        s = 'repeated' if ti_tp else 'single-shot'
        ann += 'TI/TP = %d: %s operation upon fixed-cycle timer interrupt '\
               'events\n' % (ti_tp, s)
        s = '' if af else 'no '
        ann += 'AF = %d: %salarm interrupt detected\n' % (af, s)
        s = '' if tf else 'no '
        ann += 'TF = %d: %sfixed-cycle timer interrupt detected\n' % (tf, s)
        s = 'enabled' if aie else 'prohibited'
        ann += 'AIE = %d: INT# pin output %s when an alarm interrupt '\
               'occurs\n' % (aie, s)
        s = 'enabled' if tie else 'prohibited'
        ann += 'TIE = %d: INT# pin output %s when a fixed-cycle interrupt '\
               'event occurs\n' % (tie, s)

        self.putx([1, [ann]])

    def handle_reg_0x02(self, b): # Seconds / Voltage-low bit
        vl = 1 if (b & (1 << 7)) else 0
        self.putd(7, 7, [12, ['Voltage low: %d' % vl, 'Volt. low: %d' % vl,
                        'VL: %d' % vl, 'VL']])
        s = self.seconds = bcd2int(b & 0x7f)
        self.putd(6, 0, [2, ['Second: %d' % s, 'Sec: %d' % s, 'S: %d' % s, 'S']])

    def handle_reg_0x03(self, b): # Minutes
        self.putr(7)
        m = self.minutes = bcd2int(b & 0x7f)
        self.putd(6, 0, [3, ['Minute: %d' % m, 'Min: %d' % m, 'M: %d' % m, 'M']])

    def handle_reg_0x04(self, b): # Hours
        self.putr(7)
        self.putr(6)
        h = self.hours = bcd2int(b & 0x3f)
        self.putd(5, 0, [4, ['Hour: %d' % h, 'H: %d' % h, 'H']])

    def handle_reg_0x05(self, b): # Days
        self.putr(7)
        self.putr(6)
        d = self.days = bcd2int(b & 0x3f)
        self.putd(5, 0, [5, ['Day: %d' % d, 'D: %d' % d, 'D']])

    def handle_reg_0x06(self, b): # Weekdays
        for i in (7, 6, 5, 4, 3):
            self.putr(i)
        w = self.weekdays = bcd2int(b & 0x07)
        self.putd(2, 0, [6, ['Weekday: %d' % w, 'WD: %d' % w, 'WD', 'W']])

    def handle_reg_0x07(self, b): # Months / century bit
        c = 1 if (b & (1 << 7)) else 0
        self.putd(7, 7, [13, ['Century bit: %d' % c, 'Century: %d' % c,
                              'Cent: %d' % c, 'C: %d' % c, 'C']])
        self.putr(6)
        self.putr(5)
        m = self.months = bcd2int(b & 0x1f)
        self.putd(4, 0, [7, ['Month: %d' % m, 'Mon: %d' % m, 'M: %d' % m, 'M']])

    def handle_reg_0x08(self, b): # Years
        y = self.years = bcd2int(b & 0xff)
        self.putx([8, ['Year: %d' % y, 'Y: %d' % y, 'Y']])

    def handle_reg_0x09(self, b): # Alarm, minute
        pass

    def handle_reg_0x0a(self, b): # Alarm, hour
        pass

    def handle_reg_0x0b(self, b): # Alarm, day
        pass

    def handle_reg_0x0c(self, b): # Alarm, weekday
        pass

    def handle_reg_0x0d(self, b): # CLKOUT output
        pass

    def handle_reg_0x0e(self, b): # Timer setting
        pass

    def handle_reg_0x0f(self, b): # Down counter for fixed-cycle timer
        pass

    def decode(self, ss, es, data):
        cmd, databyte = data

        # Collect the 'BITS' packet, then return. The next packet is
        # guaranteed to belong to these bits we just stored.
        if cmd == 'BITS':
            self.bits = databyte
            return

        # Store the start/end samples of this I²C packet.
        self.ss, self.es = ss, es

        # State machine.
        if self.state == 'IDLE':
            # Wait for an I²C START condition.
            if cmd != 'START':
                return
            self.state = 'GET SLAVE ADDR'
            self.block_start_sample = ss
        elif self.state == 'GET SLAVE ADDR':
            # Wait for an address write operation.
            # TODO: We should only handle packets to the RTC slave (0xa2/0xa3).
            if cmd != 'ADDRESS WRITE':
                return
            self.state = 'GET REG ADDR'
        elif self.state == 'GET REG ADDR':
            # Wait for a data write (master selects the slave register).
            if cmd != 'DATA WRITE':
                return
            self.reg = databyte
            self.state = 'WRITE RTC REGS'
        elif self.state == 'WRITE RTC REGS':
            # If we see a Repeated Start here, it's probably an RTC read.
            if cmd == 'START REPEAT':
                self.state = 'READ RTC REGS'
                return
            # Otherwise: Get data bytes until a STOP condition occurs.
            if cmd == 'DATA WRITE':
                r, s = self.reg, '%02X: %02X' % (self.reg, databyte)
                self.putx([15, ['Write register %s' % s, 'Write reg %s' % s,
                                'WR %s' % s, 'WR', 'W']])
                handle_reg = getattr(self, 'handle_reg_0x%02x' % self.reg)
                handle_reg(databyte)
                self.reg += 1
                # TODO: Check for NACK!
            elif cmd == 'STOP':
                # TODO: Handle read/write of only parts of these items.
                d = '%02d.%02d.%02d %02d:%02d:%02d' % (self.days, self.months,
                    self.years, self.hours, self.minutes, self.seconds)
                self.put(self.block_start_sample, es, self.out_ann,
                         [9, ['Write date/time: %s' % d, 'Write: %s' % d,
                              'W: %s' % d]])
                self.state = 'IDLE'
            else:
                pass # TODO
        elif self.state == 'READ RTC REGS':
            # Wait for an address read operation.
            # TODO: We should only handle packets to the RTC slave (0xa2/0xa3).
            if cmd == 'ADDRESS READ':
                self.state = 'READ RTC REGS2'
                return
            else:
                pass # TODO
        elif self.state == 'READ RTC REGS2':
            if cmd == 'DATA READ':
                r, s = self.reg, '%02X: %02X' % (self.reg, databyte)
                self.putx([15, ['Read register %s' % s, 'Read reg %s' % s,
                                'RR %s' % s, 'RR', 'R']])
                handle_reg = getattr(self, 'handle_reg_0x%02x' % self.reg)
                handle_reg(databyte)
                self.reg += 1
                # TODO: Check for NACK!
            elif cmd == 'STOP':
                d = '%02d.%02d.%02d %02d:%02d:%02d' % (self.days, self.months,
                    self.years, self.hours, self.minutes, self.seconds)
                self.put(self.block_start_sample, es, self.out_ann,
                         [10, ['Read date/time: %s' % d, 'Read: %s' % d,
                               'R: %s' % d]])
                self.state = 'IDLE'
            else:
                pass # TODO?
        else:
            raise Exception('Invalid state: %s' % self.state)
Commit	Line	Data
	1	##
	2	## This file is part of the libsigrokdecode project.
	3	##
	4	## Copyright (C) 2012-2014 Uwe Hermann <uwe@hermann-uwe.de>
	5	##
	6	## This program is free software; you can redistribute it and/or modify
	7	## it under the terms of the GNU General Public License as published by
	8	## the Free Software Foundation; either version 2 of the License, or
	9	## (at your option) any later version.
	10	##
	11	## This program is distributed in the hope that it will be useful,
	12	## but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	## GNU General Public License for more details.
	15	##
	16	## You should have received a copy of the GNU General Public License
	17	## along with this program; if not, write to the Free Software
	18	## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	##
	20
	21	import sigrokdecode as srd
	22
	23	# Return the specified BCD number (max. 8 bits) as integer.
	24	def bcd2int(b):
	25	return (b & 0x0f) + ((b >> 4) * 10)
	26
	27	class Decoder(srd.Decoder):
	28	api_version = 1
	29	id = 'rtc8564'
	30	name = 'RTC-8564'
	31	longname = 'Epson RTC-8564 JE/NB'
	32	desc = 'Realtime clock module protocol.'
	33	license = 'gplv2+'
	34	inputs = ['i2c']
	35	outputs = ['rtc8564']
	36	probes = []
	37	optional_probes = [
	38	{'id': 'clkout', 'name': 'CLKOUT', 'desc': 'Clock output'},
	39	{'id': 'clkoe', 'name': 'CLKOE', 'desc': 'Clock output enable'},
	40	{'id': 'int', 'name': 'INT#', 'desc': 'Interrupt'},
	41	]
	42	options = {}
	43	annotations = \
	44	[['reg-0x%02x' % i, 'Register 0x%02x' % i] for i in range(8 + 1)] + [
	45	['read', 'Read date/time'],
	46	['write', 'Write date/time'],
	47	['bit-reserved', 'Reserved bit'],
	48	['bit-vl', 'VL bit'],
	49	['bit-century', 'Century bit'],
	50	['reg-read', 'Register read'],
	51	['reg-write', 'Register write'],
	52	]
	53	annotation_rows = (
	54	('bits', 'Bits', tuple(range(0, 8 + 1)) + (11, 12, 13)),
	55	('regs', 'Register access', (14, 15)),
	56	('date-time', 'Date/time', (9, 10)),
	57	)
	58
	59	def __init__(self, **kwargs):
	60	self.state = 'IDLE'
	61	self.hours = -1
	62	self.minutes = -1
	63	self.seconds = -1
	64	self.days = -1
	65	self.weekdays = -1
	66	self.months = -1
	67	self.years = -1
	68	self.bits = []
	69
	70	def start(self):
	71	# self.out_python = self.register(srd.OUTPUT_PYTHON)
	72	self.out_ann = self.register(srd.OUTPUT_ANN)
	73
	74	def putx(self, data):
	75	self.put(self.ss, self.es, self.out_ann, data)
	76
	77	def putd(self, bit1, bit2, data):
	78	self.put(self.bits[bit1][1], self.bits[bit2][2], self.out_ann, data)
	79
	80	def putr(self, bit):
	81	self.put(self.bits[bit][1], self.bits[bit][2], self.out_ann,
	82	[11, ['Reserved bit', 'Reserved', 'Rsvd', 'R']])
	83
	84	def handle_reg_0x00(self, b): # Control register 1
	85	pass
	86
	87	def handle_reg_0x01(self, b): # Control register 2
	88	ti_tp = 1 if (b & (1 << 4)) else 0
	89	af = 1 if (b & (1 << 3)) else 0
	90	tf = 1 if (b & (1 << 2)) else 0
	91	aie = 1 if (b & (1 << 1)) else 0
	92	tie = 1 if (b & (1 << 0)) else 0
	93
	94	ann = ''
	95
	96	s = 'repeated' if ti_tp else 'single-shot'
	97	ann += 'TI/TP = %d: %s operation upon fixed-cycle timer interrupt '\
	98	'events\n' % (ti_tp, s)
	99	s = '' if af else 'no '
	100	ann += 'AF = %d: %salarm interrupt detected\n' % (af, s)
	101	s = '' if tf else 'no '
	102	ann += 'TF = %d: %sfixed-cycle timer interrupt detected\n' % (tf, s)
	103	s = 'enabled' if aie else 'prohibited'
	104	ann += 'AIE = %d: INT# pin output %s when an alarm interrupt '\
	105	'occurs\n' % (aie, s)
	106	s = 'enabled' if tie else 'prohibited'
	107	ann += 'TIE = %d: INT# pin output %s when a fixed-cycle interrupt '\
	108	'event occurs\n' % (tie, s)
	109
	110	self.putx([1, [ann]])
	111
	112	def handle_reg_0x02(self, b): # Seconds / Voltage-low bit
	113	vl = 1 if (b & (1 << 7)) else 0
	114	self.putd(7, 7, [12, ['Voltage low: %d' % vl, 'Volt. low: %d' % vl,
	115	'VL: %d' % vl, 'VL']])
	116	s = self.seconds = bcd2int(b & 0x7f)
	117	self.putd(6, 0, [2, ['Second: %d' % s, 'Sec: %d' % s, 'S: %d' % s, 'S']])
	118
	119	def handle_reg_0x03(self, b): # Minutes
	120	self.putr(7)
	121	m = self.minutes = bcd2int(b & 0x7f)
	122	self.putd(6, 0, [3, ['Minute: %d' % m, 'Min: %d' % m, 'M: %d' % m, 'M']])
	123
	124	def handle_reg_0x04(self, b): # Hours
	125	self.putr(7)
	126	self.putr(6)
	127	h = self.hours = bcd2int(b & 0x3f)
	128	self.putd(5, 0, [4, ['Hour: %d' % h, 'H: %d' % h, 'H']])
	129
	130	def handle_reg_0x05(self, b): # Days
	131	self.putr(7)
	132	self.putr(6)
	133	d = self.days = bcd2int(b & 0x3f)
	134	self.putd(5, 0, [5, ['Day: %d' % d, 'D: %d' % d, 'D']])
	135
	136	def handle_reg_0x06(self, b): # Weekdays
	137	for i in (7, 6, 5, 4, 3):
	138	self.putr(i)
	139	w = self.weekdays = bcd2int(b & 0x07)
	140	self.putd(2, 0, [6, ['Weekday: %d' % w, 'WD: %d' % w, 'WD', 'W']])
	141
	142	def handle_reg_0x07(self, b): # Months / century bit
	143	c = 1 if (b & (1 << 7)) else 0
	144	self.putd(7, 7, [13, ['Century bit: %d' % c, 'Century: %d' % c,
	145	'Cent: %d' % c, 'C: %d' % c, 'C']])
	146	self.putr(6)
	147	self.putr(5)
	148	m = self.months = bcd2int(b & 0x1f)
	149	self.putd(4, 0, [7, ['Month: %d' % m, 'Mon: %d' % m, 'M: %d' % m, 'M']])
	150
	151	def handle_reg_0x08(self, b): # Years
	152	y = self.years = bcd2int(b & 0xff)
	153	self.putx([8, ['Year: %d' % y, 'Y: %d' % y, 'Y']])
	154
	155	def handle_reg_0x09(self, b): # Alarm, minute
	156	pass
	157
	158	def handle_reg_0x0a(self, b): # Alarm, hour
	159	pass
	160
	161	def handle_reg_0x0b(self, b): # Alarm, day
	162	pass
	163
	164	def handle_reg_0x0c(self, b): # Alarm, weekday
	165	pass
	166
	167	def handle_reg_0x0d(self, b): # CLKOUT output
	168	pass
	169
	170	def handle_reg_0x0e(self, b): # Timer setting
	171	pass
	172
	173	def handle_reg_0x0f(self, b): # Down counter for fixed-cycle timer
	174	pass
	175
	176	def decode(self, ss, es, data):
	177	cmd, databyte = data
	178
	179	# Collect the 'BITS' packet, then return. The next packet is
	180	# guaranteed to belong to these bits we just stored.
	181	if cmd == 'BITS':
	182	self.bits = databyte
	183	return
	184
	185	# Store the start/end samples of this I²C packet.
	186	self.ss, self.es = ss, es
	187
	188	# State machine.
	189	if self.state == 'IDLE':
	190	# Wait for an I²C START condition.
	191	if cmd != 'START':
	192	return
	193	self.state = 'GET SLAVE ADDR'
	194	self.block_start_sample = ss
	195	elif self.state == 'GET SLAVE ADDR':
	196	# Wait for an address write operation.
	197	# TODO: We should only handle packets to the RTC slave (0xa2/0xa3).
	198	if cmd != 'ADDRESS WRITE':
	199	return
	200	self.state = 'GET REG ADDR'
	201	elif self.state == 'GET REG ADDR':
	202	# Wait for a data write (master selects the slave register).
	203	if cmd != 'DATA WRITE':
	204	return
	205	self.reg = databyte
	206	self.state = 'WRITE RTC REGS'
	207	elif self.state == 'WRITE RTC REGS':
	208	# If we see a Repeated Start here, it's probably an RTC read.
	209	if cmd == 'START REPEAT':
	210	self.state = 'READ RTC REGS'
	211	return
	212	# Otherwise: Get data bytes until a STOP condition occurs.
	213	if cmd == 'DATA WRITE':
	214	r, s = self.reg, '%02X: %02X' % (self.reg, databyte)
	215	self.putx([15, ['Write register %s' % s, 'Write reg %s' % s,
	216	'WR %s' % s, 'WR', 'W']])
	217	handle_reg = getattr(self, 'handle_reg_0x%02x' % self.reg)
	218	handle_reg(databyte)
	219	self.reg += 1
	220	# TODO: Check for NACK!
	221	elif cmd == 'STOP':
	222	# TODO: Handle read/write of only parts of these items.
	223	d = '%02d.%02d.%02d %02d:%02d:%02d' % (self.days, self.months,
	224	self.years, self.hours, self.minutes, self.seconds)
	225	self.put(self.block_start_sample, es, self.out_ann,
	226	[9, ['Write date/time: %s' % d, 'Write: %s' % d,
	227	'W: %s' % d]])
	228	self.state = 'IDLE'
	229	else:
	230	pass # TODO
	231	elif self.state == 'READ RTC REGS':
	232	# Wait for an address read operation.
	233	# TODO: We should only handle packets to the RTC slave (0xa2/0xa3).
	234	if cmd == 'ADDRESS READ':
	235	self.state = 'READ RTC REGS2'
	236	return
	237	else:
	238	pass # TODO
	239	elif self.state == 'READ RTC REGS2':
	240	if cmd == 'DATA READ':
	241	r, s = self.reg, '%02X: %02X' % (self.reg, databyte)
	242	self.putx([15, ['Read register %s' % s, 'Read reg %s' % s,
	243	'RR %s' % s, 'RR', 'R']])
	244	handle_reg = getattr(self, 'handle_reg_0x%02x' % self.reg)
	245	handle_reg(databyte)
	246	self.reg += 1
	247	# TODO: Check for NACK!
	248	elif cmd == 'STOP':
	249	d = '%02d.%02d.%02d %02d:%02d:%02d' % (self.days, self.months,
	250	self.years, self.hours, self.minutes, self.seconds)
	251	self.put(self.block_start_sample, es, self.out_ann,
	252	[10, ['Read date/time: %s' % d, 'Read: %s' % d,
	253	'R: %s' % d]])
	254	self.state = 'IDLE'
	255	else:
	256	pass # TODO?
	257	else:
	258	raise Exception('Invalid state: %s' % self.state)
	259