stc12+: drop checksum verification for flashing

It's not needed on STC12 and up. All transfers are error checked with
parity and a 16-bit modular sum already. STC15 dropped the verification
checksum on the protocol level, it's not sent with the write status
packet, which is a testament to it being useless.

Some parts store the UID in the last bytes of flash memory and this
verification actually caused incorrect verification failures because
of that.

Fixes grigorig/stcgal#15.

README.md

@@ -4,15 +4,16 @@ stcgal - STC MCU ISP flash tool
 stcgal is a command line flash programming tool for STC MCU Ltd. [1]
 8051 compatible microcontrollers. The name was inspired by avrdude [2].
 
-STC microcontrollers have a UART based boot strap loader (BSL). It
+STC microcontrollers have an UART/USB based boot strap loader (BSL). It
 utilizes a packet-based protocol to flash the code memory and IAP
-memory over a serial link. This is referred to as in-system programming (ISP).
-The BSL is also used to configure various (fuse-like) device
+memory over a serial link. This is referred to as in-system programming
+(ISP).  The BSL is also used to configure various (fuse-like) device
 options. Unfortunately, this protocol is not publicly documented and
 STC only provide a (crude) Windows GUI application for programming.
 
-stcgal is a full-featured Open Source replacement for STC's Windows software;
-it supports a wide range of MCUs, it is very portable and suitable for automation.
+stcgal is a full-featured Open Source replacement for STC's Windows
+software; it supports a wide range of MCUs, it is very portable and
+suitable for automation.
 
 [1] http://stcmcu.com/
 [2] http://www.nongnu.org/avrdude/
@@ -25,23 +26,32 @@ stcgal should fully support STC 89/90/10/11/12/15 series MCUs.
 So far, stcgal was tested with the following MCU models:
 
 * STC89C52RC (BSL version: 4.3C)
+* STC90C52RC (BSL version: 4.3C)
+* STC89C54RD+ (BSL version: 4.3C)
+* STC12C2052 (BSL version: 5.8D)
 * STC12C2052AD (BSL version: 5.8D)
+* STC12C5608AD (BSL version: 6.0G)
+* STC12C5A16S2 (BSL version: 6.2I)
 * STC12C5A60S2 (BSL version: 6.2I)
 * STC11F02E (BSL version: 6.5K)
+* STC10F04XE (BSL version: 6.5J)
 * STC11F08XE (BSL version: 6.5M)
+* STC12C5204AD (BSL version: 6.6H)
 * STC15F104E (BSL version: 6.7Q)
 * STC15F204EA (BSL version: 6.7R)
-* STC15L104W (BSL version: 7.1Q)
-* IAP15F2K61S2 (BSL version: 7.1S)
+* STC15L104W (BSL version: 7.1.4Q)
+* STC15F104W (BSL version: 7.1.4Q)
+* IAP15F2K61S2 (BSL version: 7.1.4S)
 * STC15L2K16S2 (BSL version: 7.2.4S)
 * STC15W408AS (BSL version: 7.2.4T)
-* STC15W4K56S4 (BSL version: 7.3.4T)
+* STC15W4K56S4 (BSL version: 7.3.4T, UART and USB mode)
 
-More compatibility testing is going to happen soon.
+Compatibility reports, both negative and positive, are welcome.
 
 Features
 --------
 
+* UART and USB BSL support
 * Display part info
 * Determine operating frequency
 * Program flash memory
@@ -49,11 +59,14 @@ Features
 * Set device options
 * Read unique device ID (STC 10/11/12/15)
 * Trim RC oscillator frequency (STC 15)
+* Automatic power-cycling with DTR toggle
+* Automatic UART protocol detection
 
 Installation
 ------------
 
-stcgal requires Python 3.2 (or later) and pySerial. You can run stcgal
+stcgal requires Python 3.2 (or later) and pySerial. USB support is
+optional and requires pyusb 1.0.0b2 or later. You can run stcgal
 directly with the included ```stcgal.py``` script. The recommended
 method for permanent installation is to use Python's setuptools. Run
 ```./setup.py build``` to build and ```sudo ./setup.py install```
@@ -66,24 +79,27 @@ Usage
 Call stcgal with ```-h``` for usage information.
 
 ```
-usage: stcgal.py [-h] [-P {stc89,stc12a,stc12,stc15a,stc15}] [-p PORT]
-                 [-b BAUD] [-l HANDSHAKE] [-o OPTION] [-t TRIM] [-D]
-                 [code_binary] [eeprom_binary]
+usage: stcgal.py [-h] [-a] [-P {stc89,stc12a,stc12,stc15a,stc15,auto}]
+                 [-p PORT] [-b BAUD] [-l HANDSHAKE] [-o OPTION] [-t TRIM] [-D]
+                 [code_image] [eeprom_image]
 
 stcgal 1.0 - an STC MCU ISP flash tool
+(C) 2014-2015 Grigori Goronzy
+https://github.com/grigorig/stcgal
 
 positional arguments:
-  code_binary           code segment binary file to flash
-  eeprom_binary         eeprom segment binary file to flash
+  code_image            code segment file to flash (BIN/HEX)
+  eeprom_image          eeprom segment file to flash (BIN/HEX)
 
 optional arguments:
   -h, --help            show this help message and exit
-  -P {stc89,stc12a,stc12,stc15a,stc15}, --protocol {stc89,stc12a,stc12,stc15a,stc15}
+  -a, --autoreset       cycle power automatically by asserting DTR
+  -P {stc89,stc12a,stc12,stc15a,stc15,auto}, --protocol {stc89,stc12a,stc12,stc15a,stc15,auto}
                         protocol version
   -p PORT, --port PORT  serial port device
   -b BAUD, --baud BAUD  transfer baud rate (default: 19200)
   -l HANDSHAKE, --handshake HANDSHAKE
-                        handshake baud rate (default: 1200)
+                        handshake baud rate (default: 2400)
   -o OPTION, --option OPTION
                         set option (can be used multiple times)
   -t TRIM, --trim TRIM  RC oscillator frequency in kHz (STC15 series only)
@@ -95,14 +111,18 @@ Most importantly, ```-p``` sets the serial port to be used for programming.
 ### Protocols
 
 STC MCUs use a variety of related but incompatible protocols for the
-BSL. The protocol must be specified with the ```-P``` flag. Here's
-the general mapping between protocols and MCU series:
+BSL. The protocol can be specified with the ```-P``` flag. By default
+UART protocol autodetection is used. The mapping between protocols
+and MCU series is as follows:
 
-* ```stc89``` STC 89/90 series
-* ```stc12a``` STC12Cx052AD and possibly others
+* ```stc89``` STC89/90 series
+* ```stc12a``` STC12x052 series and possibly others
+* ```stc12b``` STC12x52 series, STC12x56 series and possibly others
 * ```stc12``` Most STC10/11/12 series
 * ```stc15a``` STC15x104E and STC15x204E(A) series
 * ```stc15``` Most STC15 series
+* ```usb15``` USB support on STC15W4 series
+* ```auto``` Automatic detection of UART based protocols (default)
 
 The text files in the doc/ subdirectory provide an overview over
 the reverse engineered protocols used by the BSLs. For more details,
@@ -221,7 +241,9 @@ Option key                    | Possible values   | Protocols/Models    | Descri
 ```ale_enabled```             | true/false        | STC89 only          | ALE pin enabled if true, normal GPIO if false
 ```xram_enabled```            | true/false        | STC89 only          | Use internal XRAM (STC89 only)
 ```watchdog_por_enabled```    | true/false        | All                 | Watchdog state after power-on reset (POR)
-```low_voltage_reset ```      | true/false        | STC12A+             | Low-voltage reset (brownout)
+```low_voltage_reset```       | low/high          | STC12A/STC12        | Low-voltage reset level (low: ~3.3V, high: ~3.7V)
+```low_voltage_reset```       | true/false        | STC12               | Enable RESET2 pin low voltage detect
+```low_voltage_reset```       | true/false        | STC15A              | Enable low-voltage reset (brownout)
 ```clock_source```            | internal/external | STC12A+ with XTAL   | Use internal (RC) or external (crystal) clock
 ```watchdog_stop_idle```      | true/false        | STC12A+             | Stop watchdog in IDLE mode
 ```watchdog_prescale```       | 2,4,8,...,256     | STC12A+             | Watchdog timer prescaler, must be a power of two.
@@ -244,6 +266,31 @@ device options. Use the ```-t``` flag to request trimming to a certain
 value. Generally, frequencies between 4 and 35 MHz can be achieved. If
 trimming fails, stcgal will abort.
 
+### Automatic power-cycling
+
+STC's microcontrollers require a power-on reset to invoke the bootloader,
+which can be inconvenient. stcgal can use the DTR control signal of a
+serial interface to automate this. The DTR signal is asserted for
+approximately 500 ms when the autoreset feature is enabled with the
+```-a``` flag. This requires external circuitry to actually switch the
+power. In some cases, when the microcontroller draws only little power,
+it is possible to directly supply power from the DTR signal, however.
+
+### Exit status
+
+The exit status is 0 if no error occured while executing stcgal. Any
+error, such as a protocol error or I/O error, results in an exit
+status of 1. If the the user aborted stcgal by pressing CTRL-C,
+that results in an exit status of 2.
+
+### USB support
+
+STC15W4 series have an USB-based BSL that can be optionally
+used. USB support in stcgal is experimental and might change in the
+future. USB mode is enabled by using the ```usb15``` protocol. The
+port (```-p```) flag as well as the baudrate options are ignored for
+the USB protocol. RC frequency trimming is not supported.
+
 License
 -------
 

debian/changelog

@@ -1,3 +1,10 @@
+stcgal (1.2) unstable; urgency=low
+
+  * Update to 1.2
+  * Add optional python3-usb dependency
+
+ -- Grigori Goronzy <greg@chown.ath.cx>  Fri, 20 May 2016 03:21:25 +0200
+
 stcgal (1.0git) unstable; urgency=low
 
   * Initial Debianized Release

debian/control

@@ -10,17 +10,17 @@ X-Python3-Version: >= 3.2
 Package: stcgal
 Architecture: all
 Depends: ${misc:Depends}, python3, python3-serial
+Recommends: python3-usb (>= 1.0.0~b2)
 Description: STC MCU ISP flash tool
- stcgal is a command line flash programming tool for STC MCU Ltd. 8051
- compatible microcontrollers. The name was inspired by avrdude.
+ stcgal is a command line flash programming tool for STC MCU Ltd.
+ 8051 compatible microcontrollers. The name was inspired by avrdude.
  .
- STC microcontrollers have a UART based boot strap loader (BSL). It
- utilizes a packet-based protocol to flash the code memory and
- IAP memory over a serial link. This is referred to as in-system
- programming (ISP). The BSL is also used to configure various
- (fuse-like) device options. Unfortunately, this protocol is not
- publicly documented and STC only provide a (crude) Windows GUI
- application for programming.
+ STC microcontrollers have an UART/USB based boot strap loader (BSL). It
+ utilizes a packet-based protocol to flash the code memory and IAP
+ memory over a serial link. This is referred to as in-system programming
+ (ISP). The BSL is also used to configure various (fuse-like) device
+ options. Unfortunately, this protocol is not publicly documented and
+ STC only provide a (crude) Windows GUI application for programming.
  .
  stcgal is a full-featured Open Source replacement for STC's Windows
  software; it supports a wide range of MCUs, it is very portable and

doc/dump-mcu.py

@@ -1,13 +1,13 @@
 #!/usr/bin/env python3
 # This curious script dumps all model info from STC-ISP.
 # Data is directly read from the binary.
-# Offsets are for STC-ISP 6.85I, sha1sum a1a625d6c491fe98d0286ebac0a8d78b94dca81d
+# Offsets are for stc-isp-15xx-v6.85K.exe, sha1sum aa66e4c1ab49de27369b83c954a7c202acce0950
 
-MCU_TABLE_OFFSET = 0x00063550
-MCU_TABLE_SIZE = 914
+MCU_TABLE_OFFSET = 0x00064550
+MCU_TABLE_SIZE = 941
 MCU_RECORD_SIZE = 32
-MCU_NAMES_OFFSET = 0x0007d708
-MCU_NAMES_PTR_OFFSET = 0x0047d708
+MCU_NAMES_OFFSET = 0x0007e80c
+MCU_NAMES_PTR_OFFSET = 0x0047e80c
 
 import struct
 import sys
@@ -25,12 +25,12 @@ for i in range(MCU_TABLE_SIZE):
     inp.seek(mcu_name_offset)
     name_str = inp.read(16).split(b'\00')[0].decode("ascii")
 
-    # XXX: 1 KB are reserved one *some* MCUs for some reason
-    #if ee_size > 0 and not name_str.startswith("IAP"):
-    #    ee_size -= 1024
+    # TODO: With some MCUs, the amount of available EEPROM depends on the BSL version.
+    # Generally, newer BSLs free up a KB of additional EEPROM. Currently, always the
+    # maximum amount (with newer BSL) is reported.
 
-    # STC12C54xx always have 12 KB eeprom
-    if name_str.startswith("STC12C54"):
+    # STC12x54xx always have 12 KB eeprom
+    if name_str.startswith("STC12C54") or name_str.startswith("STC12LE54"):
         ee_size = 12 * 1024
 
     print("MCUModel(name='%s', magic=0x%02x%02x, total=%d, code=%d, eeprom=%d)," %

doc/stc12a-options.txt

@@ -4,7 +4,7 @@ Placement of configuration values
 "~" means the bit is a negated boolean. Sometimes values overlap,
 depending on MCU model.
 
-In STC12A series, the first 4 MCS bytes have active
+In STC12A series, the first 7 MCS bytes have active
 values. Generally, unused bits should be set to 1.
 
 MCS0
@@ -47,14 +47,9 @@ MSB     7       6       5       4       3       2       1       0       LSB
          (or others, depends on MCU model) are held low on POR.
 
 
-MCS3
-----
 
-Unused.
-
-
-MCS4
-----
+MCS3 (at index 6!)
+------------------
 
 MSB     7       6       5       4       3       2       1       0       LSB
                 LVD

doc/stc15-options.txt

@@ -111,7 +111,31 @@ in set options packet:
 46 B9 6A 00 4B 04 00 00 5A A5 FF FF FF 00 FF FF
 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
 00 00 FF A8 FF EE FF E0 FF FD 03 FF FF FF FF FF
+^^
+MCSP
 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
 FF FD FF FF FF 75 BF F7 BC 9F 3A 80 16
    ^^
    MCSY
+
+password setting
+
+the password is sent with packet type 0x07 and checked before erase with packet type 0x05. setting the password uses two fields.
+index 22 of the option block encodes the password length in bytes (MCSP, see above). bit 3 in MCS3 decides whether the password
+will be checked. if the bit is set, no password check occurs. if it is reset, a password check occurs.
+
+quick dump from USB-ISP packets:
+
+set: foobar
+0000   ff ff ff 00 ff ff 00 05 ff ff ff ff ff ff ff 07  ................
+0010   ff ff ff ff ff ff ff 07 ff 06 01 ff 6e ff 36 58  ............n.6X
+0020   ff 00 ff f5 03 ff ff 0c ff ff ff ff ff ff ff 07  ................
+0030   ff ff ff ff ff ff ff 07 ff ff ff ff ff ff ec 1a  ................
+0040   ff ff ff 99 7f f7 bc 38 9f 61                    .......8.a
+
+reset:
+0000   ff ff ff 00 ff ff 00 05 ff ff ff ff ff ff ff 07  ................
+0010   ff ff ff ff ff ff ff 07 ff 00 01 ff 6e ff 36 5e  ............n.6^
+0020   ff 00 ff fd 03 ff ff 04 ff ff ff ff ff ff ff 07  ................
+0030   ff ff ff ff ff ff ff 07 ff ff ff ff ff ff ec 1a  ................
+0040   ff ff ff 99 7f f7 bc 38 9f 61                    .......8.a

doc/usb15-protocol.txt

@@ -0,0 +1,35 @@
+STC15 series USB ISP protocol
+=============================
+
+- host does OUT and IN control transfers for write and read
+- IN transfer with wLength = 132, wValue = 0, wIndex = 0, bRequest = 0 are used for all reads
+- OUT transfers with arbitrary size are used for writes
+
+- packets from MCU
+  always start with 0x46 0xb9, similar to serial protocols
+  third byte is packet length
+  followed by data bytes
+  8 bit checksum at the end, looks like 8 bit modular subtraction
+
+- packet types
+  most likely derived from the serial protocol, at least partially
+
+  info packet
+  - same as with serial protocol
+
+  option packet
+  - generally same as with serial protocol, some header stuff omitted
+
+- flash data
+  wIndex specifies write address
+  wValue is 0xa55a
+  bRequest is 0x22 for first packet, 0x02 for the following ones
+  unusually encoded: a total of 128 bytes per packet, with every 7 byte checksummed in some way, for a total of 18x7 byte segments and a final 2 byte segment
+  checksum: 8 bit inverted modular sum
+
+- option packet
+  wIndex is 0
+  wValue is 0xa55a
+  bRequest is 4
+  seems to use the same checksumming scheme
+

setup.py

@@ -1,4 +1,25 @@
 #!/usr/bin/env python3
+#
+# Copyright (c) 2016 Grigori Goronzy <greg@chown.ath.cx>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
 
 import stcgal
 from setuptools import setup, find_packages
@@ -8,6 +29,9 @@ setup(
     version = stcgal.__version__,
     packages = find_packages(exclude=["doc"]),
     install_requires = ["pyserial"],
+    extras_require = {
+        "usb": ["pyusb>=1.0.0"]
+    },
     entry_points = {
         "console_scripts": [
             "stcgal = stcgal.frontend:cli",

stcgal/__init__.py

@@ -1 +1 @@
-__version__ = "1.0"
+__version__ = "1.2"

stcgal/frontend.py

@@ -32,18 +32,25 @@ class StcGal:
 
     def __init__(self, opts):
         self.opts = opts
+
         if opts.protocol == "stc89":
             self.protocol = Stc89Protocol(opts.port, opts.handshake, opts.baud)
         elif opts.protocol == "stc12a":
             self.protocol = Stc12AProtocol(opts.port, opts.handshake, opts.baud)
+        elif opts.protocol == "stc12b":
+            self.protocol = Stc12BProtocol(opts.port, opts.handshake, opts.baud)
         elif opts.protocol == "stc12":
             self.protocol = Stc12Protocol(opts.port, opts.handshake, opts.baud)
         elif opts.protocol == "stc15a":
             self.protocol = Stc15AProtocol(opts.port, opts.handshake, opts.baud,
                                            round(opts.trim * 1000))
-        else:
+        elif opts.protocol == "stc15":
             self.protocol = Stc15Protocol(opts.port, opts.handshake, opts.baud,
                                           round(opts.trim * 1000))
+        elif opts.protocol == "usb15":
+            self.protocol = StcUsb15Protocol()
+        else:
+            self.protocol = StcBaseProtocol(opts.port, opts.handshake, opts.baud)
 
         self.protocol.debug = opts.debug
 
@@ -104,9 +111,9 @@ class StcGal:
                 bindata = bindata[0:code_size]
             bindata += eedata
 
-        # pad to 256 byte boundary
-        if len(bindata) % 256:
-            bindata += bytes(256 - len(bindata) % 256)
+        # pad to 512 byte boundary
+        if len(bindata) % 512:
+            bindata += b'\xff' * (512 - len(bindata) % 512)
 
         if self.opts.option: self.emit_options(self.opts.option)
 
@@ -117,7 +124,21 @@ class StcGal:
         self.protocol.disconnect()
 
     def run(self):
-        try: self.protocol.connect()
+        try:
+            self.protocol.connect(autoreset=self.opts.autoreset)
+
+            if self.opts.protocol == "auto":
+                if not self.protocol.protocol_name:
+                    raise StcProtocolException("cannot detect protocol")
+                base_protocol = self.protocol
+                self.opts.protocol = self.protocol.protocol_name
+                print("Protocol detected: %s" % self.opts.protocol)
+                # recreate self.protocol with proper protocol class
+                self.__init__(self.opts)
+            else:
+                base_protocol = None
+
+            self.protocol.initialize(base_protocol)
         except KeyboardInterrupt:
             sys.stdout.flush();
             print("interrupted")
@@ -131,6 +152,10 @@ class StcGal:
             sys.stdout.flush();
             print("Serial port error: %s" % e, file=sys.stderr)
             return 1
+        except IOError as e:
+            sys.stdout.flush();
+            print("I/O error: %s" % e, file=sys.stderr)
+            return 1
 
         try:
             if self.opts.code_image:
@@ -170,10 +195,11 @@ def cli():
                                      description="stcgal %s - an STC MCU ISP flash tool\n(C) 2014-2015 Grigori Goronzy\nhttps://github.com/grigorig/stcgal" %stcgal.__version__)
     parser.add_argument("code_image", help="code segment file to flash (BIN/HEX)", type=argparse.FileType("rb"), nargs='?')
     parser.add_argument("eeprom_image", help="eeprom segment file to flash (BIN/HEX)", type=argparse.FileType("rb"), nargs='?')
-    parser.add_argument("-P", "--protocol", help="protocol version", choices=["stc89", "stc12a", "stc12", "stc15a", "stc15"], default="stc12")
+    parser.add_argument("-a", "--autoreset", help="cycle power automatically by asserting DTR", action="store_true")
+    parser.add_argument("-P", "--protocol", help="protocol version (default: auto)", choices=["stc89", "stc12a", "stc12b", "stc12", "stc15a", "stc15", "usb15", "auto"], default="auto")
     parser.add_argument("-p", "--port", help="serial port device", default="/dev/ttyUSB0")
     parser.add_argument("-b", "--baud", help="transfer baud rate (default: 19200)", type=BaudType(), default=19200)
-    parser.add_argument("-l", "--handshake", help="handshake baud rate (default: 1200)", type=BaudType(), default=1200)
+    parser.add_argument("-l", "--handshake", help="handshake baud rate (default: 2400)", type=BaudType(), default=2400)
     parser.add_argument("-o", "--option", help="set option (can be used multiple times)", action="append")
     parser.add_argument("-t", "--trim", help="RC oscillator frequency in kHz (STC15 series only)", type=float, default=0.0)
     parser.add_argument("-D", "--debug", help="enable debug output", action="store_true")

stcgal/models.py

@@ -32,14 +32,38 @@ class MCUModelDatabase:
     MCUModel = collections.namedtuple("MCUModel", ["name", "magic", "total", "code", "eeprom"])
 
     models = (
-        MCUModel(name='STC15H4K08S4', magic=0xf601, total=65536, code=8192, eeprom=0),
-        MCUModel(name='STC15H4K16S4', magic=0xf602, total=65536, code=16384, eeprom=0),
-        MCUModel(name='STC15H4K24S4', magic=0xf603, total=65536, code=24576, eeprom=0),
-        MCUModel(name='STC15H4K32S4', magic=0xf604, total=65536, code=32768, eeprom=0),
-        MCUModel(name='STC15H4K40S4', magic=0xf605, total=65536, code=40960, eeprom=0),
-        MCUModel(name='STC15H4K48S4', magic=0xf606, total=65536, code=49152, eeprom=0),
-        MCUModel(name='STC15H4K56S4', magic=0xf607, total=65536, code=57344, eeprom=0),
-        MCUModel(name='STC15H4K64S4', magic=0xf608, total=65536, code=65024, eeprom=0),
+        MCUModel(name='STC8F8K08S4A10', magic=0xf611, total=65536, code=8192, eeprom=57344),
+        MCUModel(name='STC8F8K16S4A10', magic=0xf612, total=65536, code=16384, eeprom=49152),
+        MCUModel(name='STC8F8K24S4A10', magic=0xf613, total=65536, code=24576, eeprom=40960),
+        MCUModel(name='STC8F8K32S4A10', magic=0xf614, total=65536, code=32768, eeprom=32768),
+        MCUModel(name='STC8F8K40S4A10', magic=0xf615, total=65536, code=40960, eeprom=24576),
+        MCUModel(name='STC8F8K48S4A10', magic=0xf616, total=65536, code=49152, eeprom=16384),
+        MCUModel(name='STC8F8K56S4A10', magic=0xf617, total=65536, code=57344, eeprom=8192),
+        MCUModel(name='STC8F8K64S4A10', magic=0xf618, total=65536, code=65024, eeprom=512),
+        MCUModel(name='STC8A8K08S4A12', magic=0xf621, total=65536, code=8192, eeprom=57344),
+        MCUModel(name='STC8A8K16S4A12', magic=0xf622, total=65536, code=16384, eeprom=49152),
+        MCUModel(name='STC8A8K24S4A12', magic=0xf623, total=65536, code=24576, eeprom=40960),
+        MCUModel(name='STC8A8K32S4A12', magic=0xf624, total=65536, code=32768, eeprom=32768),
+        MCUModel(name='STC8A8K40S4A12', magic=0xf625, total=65536, code=40960, eeprom=24576),
+        MCUModel(name='STC8A8K48S4A12', magic=0xf626, total=65536, code=49152, eeprom=16384),
+        MCUModel(name='STC8A8K56S4A12', magic=0xf627, total=65536, code=57344, eeprom=8192),
+        MCUModel(name='STC8A8K64S4A12', magic=0xf628, total=65536, code=65024, eeprom=512),
+        MCUModel(name='STC8F2K08S4', magic=0xf631, total=65536, code=8192, eeprom=57344),
+        MCUModel(name='STC8F2K16S4', magic=0xf632, total=65536, code=16384, eeprom=49152),
+        MCUModel(name='STC8F2K24S4', magic=0xf633, total=65536, code=24576, eeprom=40960),
+        MCUModel(name='STC8F2K32S4', magic=0xf634, total=65536, code=32768, eeprom=32768),
+        MCUModel(name='STC8F2K40S4', magic=0xf635, total=65536, code=40960, eeprom=24576),
+        MCUModel(name='STC8F2K48S4', magic=0xf636, total=65536, code=49152, eeprom=16384),
+        MCUModel(name='STC8F2K56S4', magic=0xf637, total=65536, code=57344, eeprom=8192),
+        MCUModel(name='STC8F2K64S4', magic=0xf638, total=65536, code=65024, eeprom=512),
+        MCUModel(name='STC15H4K08S4', magic=0xf601, total=65536, code=8192, eeprom=57344),
+        MCUModel(name='STC15H4K16S4', magic=0xf602, total=65536, code=16384, eeprom=49152),
+        MCUModel(name='STC15H4K24S4', magic=0xf603, total=65536, code=24576, eeprom=40960),
+        MCUModel(name='STC15H4K32S4', magic=0xf604, total=65536, code=32768, eeprom=32768),
+        MCUModel(name='STC15H4K40S4', magic=0xf605, total=65536, code=40960, eeprom=24576),
+        MCUModel(name='STC15H4K48S4', magic=0xf606, total=65536, code=49152, eeprom=16384),
+        MCUModel(name='STC15H4K56S4', magic=0xf607, total=65536, code=57344, eeprom=8192),
+        MCUModel(name='STC15H4K64S4', magic=0xf608, total=65536, code=65024, eeprom=512),
         MCUModel(name='STC15F2K08S2', magic=0xf401, total=65536, code=8192, eeprom=54272),
         MCUModel(name='STC15F2K16S2', magic=0xf402, total=65536, code=16384, eeprom=46080),
         MCUModel(name='STC15F2K24S2', magic=0xf403, total=65536, code=24576, eeprom=37888),
@@ -209,6 +233,9 @@ class MCUModelDatabase:
         MCUModel(name='STC15W1K08PWM', magic=0xf52d, total=65536, code=8192, eeprom=52224),
         MCUModel(name='STC15W1K16PWM', magic=0xf52e, total=65536, code=16384, eeprom=44032),
         MCUModel(name='STC15W1K20S', magic=0xf52f, total=65536, code=20480, eeprom=39936),
+        MCUModel(name='STC15W1K20AS', magic=0xf534, total=65536, code=20480, eeprom=39936),
+        MCUModel(name='STC15W1K32AS', magic=0xf535, total=65536, code=32768, eeprom=27648),
+        MCUModel(name='STC15W1K48AS', magic=0xf536, total=65536, code=49152, eeprom=11264),
         MCUModel(name='STC15W2K32S2', magic=0xf530, total=65536, code=32768, eeprom=27648),
         MCUModel(name='STC15W2K48S2', magic=0xf531, total=65536, code=49152, eeprom=11264),
         MCUModel(name='STC15W2K32AS', magic=0xf532, total=65536, code=32768, eeprom=27648),
@@ -812,28 +839,28 @@ class MCUModelDatabase:
         MCUModel(name='STC12C5420', magic=0xe014, total=32768, code=20480, eeprom=12288),
         MCUModel(name='STC12C5424', magic=0xe018, total=32768, code=24576, eeprom=12288),
         MCUModel(name='STC12C5428', magic=0xe01c, total=32768, code=28672, eeprom=12288),
-        MCUModel(name='STC12LE5401AD', magic=0xe0e1, total=32768, code=1024, eeprom=22016),
-        MCUModel(name='STC12LE5402AD', magic=0xe0e2, total=32768, code=2048, eeprom=20992),
-        MCUModel(name='STC12LE5404AD', magic=0xe0e4, total=32768, code=4096, eeprom=18944),
-        MCUModel(name='STC12LE5406AD', magic=0xe0e6, total=32768, code=6144, eeprom=16896),
-        MCUModel(name='STC12LE5408AD', magic=0xe0e8, total=32768, code=8192, eeprom=10752),
-        MCUModel(name='STC12LE5410AD', magic=0xe0ea, total=32768, code=10240, eeprom=4608),
-        MCUModel(name='STC12LE5412AD', magic=0xe0ec, total=32768, code=12288, eeprom=11776),
+        MCUModel(name='STC12LE5401AD', magic=0xe0e1, total=32768, code=1024, eeprom=12288),
+        MCUModel(name='STC12LE5402AD', magic=0xe0e2, total=32768, code=2048, eeprom=12288),
+        MCUModel(name='STC12LE5404AD', magic=0xe0e4, total=32768, code=4096, eeprom=12288),
+        MCUModel(name='STC12LE5406AD', magic=0xe0e6, total=32768, code=6144, eeprom=12288),
+        MCUModel(name='STC12LE5408AD', magic=0xe0e8, total=32768, code=8192, eeprom=12288),
+        MCUModel(name='STC12LE5410AD', magic=0xe0ea, total=32768, code=10240, eeprom=12288),
+        MCUModel(name='STC12LE5412AD', magic=0xe0ec, total=32768, code=12288, eeprom=12288),
         MCUModel(name='STC12LE5416AD', magic=0xe0f0, total=32768, code=16384, eeprom=12288),
-        MCUModel(name='STC12LE5420AD', magic=0xe0f4, total=32768, code=20480, eeprom=8192),
-        MCUModel(name='STC12LE5424AD', magic=0xe0f8, total=32768, code=24576, eeprom=4096),
-        MCUModel(name='STC12LE5428AD', magic=0xe0fc, total=32768, code=28672, eeprom=0),
-        MCUModel(name='STC12LE5401', magic=0xe081, total=32768, code=1024, eeprom=22016),
-        MCUModel(name='STC12LE5402', magic=0xe082, total=32768, code=2048, eeprom=20992),
-        MCUModel(name='STC12LE5404', magic=0xe084, total=32768, code=4096, eeprom=18944),
-        MCUModel(name='STC12LE5406', magic=0xe086, total=32768, code=6144, eeprom=16896),
-        MCUModel(name='STC12LE5408', magic=0xe088, total=32768, code=8192, eeprom=10752),
-        MCUModel(name='STC12LE5410', magic=0xe08a, total=32768, code=10240, eeprom=4608),
-        MCUModel(name='STC12LE5412', magic=0xe08c, total=32768, code=12288, eeprom=11776),
+        MCUModel(name='STC12LE5420AD', magic=0xe0f4, total=32768, code=20480, eeprom=12288),
+        MCUModel(name='STC12LE5424AD', magic=0xe0f8, total=32768, code=24576, eeprom=12288),
+        MCUModel(name='STC12LE5428AD', magic=0xe0fc, total=32768, code=28672, eeprom=12288),
+        MCUModel(name='STC12LE5401', magic=0xe081, total=32768, code=1024, eeprom=12288),
+        MCUModel(name='STC12LE5402', magic=0xe082, total=32768, code=2048, eeprom=12288),
+        MCUModel(name='STC12LE5404', magic=0xe084, total=32768, code=4096, eeprom=12288),
+        MCUModel(name='STC12LE5406', magic=0xe086, total=32768, code=6144, eeprom=12288),
+        MCUModel(name='STC12LE5408', magic=0xe088, total=32768, code=8192, eeprom=12288),
+        MCUModel(name='STC12LE5410', magic=0xe08a, total=32768, code=10240, eeprom=12288),
+        MCUModel(name='STC12LE5412', magic=0xe08c, total=32768, code=12288, eeprom=12288),
         MCUModel(name='STC12LE5416', magic=0xe090, total=32768, code=16384, eeprom=12288),
-        MCUModel(name='STC12LE5420', magic=0xe094, total=32768, code=20480, eeprom=8192),
-        MCUModel(name='STC12LE5424', magic=0xe098, total=32768, code=24576, eeprom=4096),
-        MCUModel(name='STC12LE5428', magic=0xe09c, total=32768, code=28672, eeprom=0),
+        MCUModel(name='STC12LE5420', magic=0xe094, total=32768, code=20480, eeprom=12288),
+        MCUModel(name='STC12LE5424', magic=0xe098, total=32768, code=24576, eeprom=12288),
+        MCUModel(name='STC12LE5428', magic=0xe09c, total=32768, code=28672, eeprom=12288),
         MCUModel(name='STC12C1052AD', magic=0xf211, total=8192, code=1024, eeprom=5120),
         MCUModel(name='STC12C2052AD', magic=0xf212, total=8192, code=2048, eeprom=4096),
         MCUModel(name='STC12C3052AD', magic=0xf213, total=8192, code=3072, eeprom=3072),

stcgal/options.py

@@ -0,0 +1,608 @@
+#
+# Copyright (c) 2013-2016 Grigori Goronzy <greg@chown.ath.cx>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+
+import struct
+from stcgal.utils import Utils
+
+class BaseOption:
+    def print(self):
+        print("Target options:")
+        for name, get_func, _ in self.options:
+            print("  %s=%s" % (name, get_func()))
+
+    def set_option(self, name, value):
+        for opt, _, set_func in self.options:
+            if opt == name:
+                print("Option %s=%s" % (name, value))
+                set_func(value)
+                return
+        raise ValueError("unknown")
+
+    def get_option(self, name):
+        for opt, get_func, _ in self.options:
+            if opt == name:
+                return get_func(name)
+        raise ValueError("unknown")
+
+    def get_msr(self):
+        return bytes(self.msr)
+
+
+class Stc89Option(BaseOption):
+    """Manipulation STC89 series option byte"""
+
+    def __init__(self, msr):
+        self.msr = msr
+        self.options = (
+            ("cpu_6t_enabled", self.get_t6, self.set_t6),
+            ("bsl_pindetect_enabled", self.get_pindetect, self.set_pindetect),
+            ("eeprom_erase_enabled", self.get_ee_erase, self.set_ee_erase),
+            ("clock_gain", self.get_clock_gain, self.set_clock_gain),
+            ("ale_enabled", self.get_ale, self.set_ale),
+            ("xram_enabled", self.get_xram, self.set_xram),
+            ("watchdog_por_enabled", self.get_watchdog, self.set_watchdog),
+        )
+
+    def get_msr(self):
+        return self.msr
+
+    def get_t6(self):
+        return not bool(self.msr & 1)
+
+    def set_t6(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0xfe
+        self.msr |= 0x01 if not bool(val) else 0x00
+
+    def get_pindetect(self):
+        return not bool(self.msr & 4)
+
+    def set_pindetect(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0xfb
+        self.msr |= 0x04 if not bool(val) else 0x00
+
+    def get_ee_erase(self):
+        return not bool(self.msr & 8)
+
+    def set_ee_erase(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0xf7
+        self.msr |= 0x08 if not bool(val) else 0x00
+
+    def get_clock_gain(self):
+        gain = bool(self.msr & 16)
+        return "high" if gain else "low"
+
+    def set_clock_gain(self, val):
+        gains = {"low": 0, "high": 0x10}
+        if val not in gains.keys():
+            raise ValueError("must be one of %s" % list(gains.keys()))
+        self.msr &= 0xef
+        self.msr |= gains[val]
+
+    def get_ale(self):
+        return bool(self.msr & 32)
+
+    def set_ale(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0xdf
+        self.msr |= 0x20 if bool(val) else 0x00
+
+    def get_xram(self):
+        return bool(self.msr & 64)
+
+    def set_xram(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0xbf
+        self.msr |= 0x40 if bool(val) else 0x00
+
+    def get_watchdog(self):
+        return not bool(self.msr & 128)
+
+    def set_watchdog(self, val):
+        val = Utils.to_bool(val);
+        self.msr &= 0x7f
+        self.msr |= 0x80 if not bool(val) else 0x00
+
+
+class Stc12AOption(BaseOption):
+    """Manipulate STC12A series option bytes"""
+
+    def __init__(self, msr):
+        assert len(msr) == 4
+        self.msr = bytearray(msr)
+
+        """list of options and their handlers"""
+        self.options = (
+            ("low_voltage_reset", self.get_low_voltage_detect, self.set_low_voltage_detect),
+            ("clock_source", self.get_clock_source, self.set_clock_source),
+            ("watchdog_por_enabled", self.get_watchdog, self.set_watchdog),
+            ("watchdog_stop_idle", self.get_watchdog_idle, self.set_watchdog_idle),
+            ("watchdog_prescale", self.get_watchdog_prescale, self.set_watchdog_prescale),
+            ("eeprom_erase_enabled", self.get_ee_erase, self.set_ee_erase),
+            ("bsl_pindetect_enabled", self.get_pindetect, self.set_pindetect),
+        )
+
+    def get_low_voltage_detect(self):
+        lvd = bool(self.msr[3] & 64)
+        return "high" if not lvd else "low"
+
+    def set_low_voltage_detect(self, val):
+        lvds = {"low": 1, "high": 0}
+        if val not in lvds.keys():
+            raise ValueError("must be one of %s" % list(sources.keys()))
+        self.msr[3] &= 0xbf
+        self.msr[3] |= lvds[val] << 6
+
+    def get_clock_source(self):
+        source = bool(self.msr[0] & 2)
+        return "external" if source else "internal"
+
+    def set_clock_source(self, val):
+        sources = {"internal": 0, "external": 1}
+        if val not in sources.keys():
+            raise ValueError("must be one of %s" % list(sources.keys()))
+        self.msr[0] &= 0xfd
+        self.msr[0] |= sources[val] << 1
+
+    def get_watchdog(self):
+        return not bool(self.msr[1] & 32)
+
+    def set_watchdog(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0xdf
+        self.msr[1] |= 0x20 if not val else 0x00
+
+    def get_watchdog_idle(self):
+        return not bool(self.msr[1] & 8)
+
+    def set_watchdog_idle(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0xf7
+        self.msr[1] |= 0x08 if not val else 0x00
+
+    def get_watchdog_prescale(self):
+        return 2 ** (((self.msr[1]) & 0x07) + 1)
+
+    def set_watchdog_prescale(self, val):
+        val = Utils.to_int(val)
+        wd_vals = {2: 0, 4: 1, 8: 2, 16: 3, 32: 4, 64: 5, 128: 6, 256: 7}
+        if val not in wd_vals.keys():
+            raise ValueError("must be one of %s" % list(wd_vals.keys()))
+        self.msr[1] &= 0xf8
+        self.msr[1] |= wd_vals[val]
+
+    def get_ee_erase(self):
+        return not bool(self.msr[2] & 2)
+
+    def set_ee_erase(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xfd
+        self.msr[2] |= 0x02 if not val else 0x00
+
+    def get_pindetect(self):
+        return not bool(self.msr[2] & 1)
+
+    def set_pindetect(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xfe
+        self.msr[2] |= 0x01 if not val else 0x00
+
+
+class Stc12Option(BaseOption):
+    """Manipulate STC10/11/12 series option bytes"""
+
+    def __init__(self, msr):
+        assert len(msr) == 4
+        self.msr = bytearray(msr)
+
+        """list of options and their handlers"""
+        self.options = (
+            ("reset_pin_enabled", self.get_reset_pin_enabled, self.set_reset_pin_enabled),
+            ("low_voltage_reset", self.get_low_voltage_detect, self.set_low_voltage_detect),
+            ("oscillator_stable_delay", self.get_osc_stable_delay, self.set_osc_stable_delay),
+            ("por_reset_delay", self.get_por_delay, self.set_por_delay),
+            ("clock_gain", self.get_clock_gain, self.set_clock_gain),
+            ("clock_source", self.get_clock_source, self.set_clock_source),
+            ("watchdog_por_enabled", self.get_watchdog, self.set_watchdog),
+            ("watchdog_stop_idle", self.get_watchdog_idle, self.set_watchdog_idle),
+            ("watchdog_prescale", self.get_watchdog_prescale, self.set_watchdog_prescale),
+            ("eeprom_erase_enabled", self.get_ee_erase, self.set_ee_erase),
+            ("bsl_pindetect_enabled", self.get_pindetect, self.set_pindetect),
+        )
+
+    def get_reset_pin_enabled(self):
+        return bool(self.msr[0] & 1)
+
+    def set_reset_pin_enabled(self, val):
+        val = Utils.to_bool(val);
+        self.msr[0] &= 0xfe
+        self.msr[0] |= 0x01 if bool(val) else 0x00
+
+    def get_low_voltage_detect(self):
+        return not bool(self.msr[0] & 64)
+
+    def set_low_voltage_detect(self, val):
+        val = Utils.to_bool(val);
+        self.msr[0] &= 0xbf
+        self.msr[0] |= 0x40 if not val else 0x00
+
+    def get_osc_stable_delay(self):
+        return 2 ** (((self.msr[0] >> 4) & 0x03) + 12)
+
+    def set_osc_stable_delay(self, val):
+        val = Utils.to_int(val)
+        osc_vals = {4096: 0, 8192: 1, 16384: 2, 32768: 3}
+        if val not in osc_vals.keys():
+            raise ValueError("must be one of %s" % list(osc_vals.keys()))
+        self.msr[0] &= 0xcf
+        self.msr[0] |= osc_vals[val] << 4
+
+    def get_por_delay(self):
+        delay = not bool(self.msr[1] & 128)
+        return "long" if delay else "short"
+
+    def set_por_delay(self, val):
+        delays = {"short": 1, "long": 0}
+        if val not in delays.keys():
+            raise ValueError("must be one of %s" % list(delays.keys()))
+        self.msr[1] &= 0x7f
+        self.msr[1] |= delays[val] << 7
+
+    def get_clock_gain(self):
+        gain = bool(self.msr[1] & 64)
+        return "high" if gain else "low"
+
+    def set_clock_gain(self, val):
+        gains = {"low": 0, "high": 1}
+        if val not in gains.keys():
+            raise ValueError("must be one of %s" % list(gains.keys()))
+        self.msr[1] &= 0xbf
+        self.msr[1] |= gains[val] << 6
+
+    def get_clock_source(self):
+        source = bool(self.msr[1] & 2)
+        return "external" if source else "internal"
+
+    def set_clock_source(self, val):
+        sources = {"internal": 0, "external": 1}
+        if val not in sources.keys():
+            raise ValueError("must be one of %s" % list(sources.keys()))
+        self.msr[1] &= 0xfd
+        self.msr[1] |= sources[val] << 1
+
+    def get_watchdog(self):
+        return not bool(self.msr[2] & 32)
+
+    def set_watchdog(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xdf
+        self.msr[2] |= 0x20 if not val else 0x00
+
+    def get_watchdog_idle(self):
+        return not bool(self.msr[2] & 8)
+
+    def set_watchdog_idle(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xf7
+        self.msr[2] |= 0x08 if not val else 0x00
+
+    def get_watchdog_prescale(self):
+        return 2 ** (((self.msr[2]) & 0x07) + 1)
+
+    def set_watchdog_prescale(self, val):
+        val = Utils.to_int(val)
+        wd_vals = {2: 0, 4: 1, 8: 2, 16: 3, 32: 4, 64: 5, 128: 6, 256: 7}
+        if val not in wd_vals.keys():
+            raise ValueError("must be one of %s" % list(wd_vals.keys()))
+        self.msr[2] &= 0xf8
+        self.msr[2] |= wd_vals[val]
+
+    def get_ee_erase(self):
+        return not bool(self.msr[3] & 2)
+
+    def set_ee_erase(self, val):
+        val = Utils.to_bool(val);
+        self.msr[3] &= 0xfd
+        self.msr[3] |= 0x02 if not val else 0x00
+
+    def get_pindetect(self):
+        return not bool(self.msr[3] & 1)
+
+    def set_pindetect(self, val):
+        val = Utils.to_bool(val);
+        self.msr[3] &= 0xfe
+        self.msr[3] |= 0x01 if not val else 0x00
+
+
+class Stc15AOption(BaseOption):
+    def __init__(self, msr):
+        assert len(msr) == 13
+        self.msr = bytearray(msr)
+
+        self.options = (
+            ("reset_pin_enabled", self.get_reset_pin_enabled, self.set_reset_pin_enabled),
+            ("watchdog_por_enabled", self.get_watchdog, self.set_watchdog),
+            ("watchdog_stop_idle", self.get_watchdog_idle, self.set_watchdog_idle),
+            ("watchdog_prescale", self.get_watchdog_prescale, self.set_watchdog_prescale),
+            ("low_voltage_reset", self.get_lvrs, self.set_lvrs),
+            ("low_voltage_threshold", self.get_low_voltage, self.set_low_voltage),
+            ("eeprom_lvd_inhibit", self.get_eeprom_lvd, self.set_eeprom_lvd),
+            ("eeprom_erase_enabled", self.get_ee_erase, self.set_ee_erase),
+            ("bsl_pindetect_enabled", self.get_pindetect, self.set_pindetect),
+        )
+
+    def set_trim(self, val):
+        self.msr[3:5] = struct.pack(">H", val)
+
+    def get_reset_pin_enabled(self):
+        return bool(self.msr[0] & 16)
+
+    def set_reset_pin_enabled(self, val):
+        val = Utils.to_bool(val);
+        self.msr[0] &= 0xef
+        self.msr[0] |= 0x10 if bool(val) else 0x00
+
+    def get_watchdog(self):
+        return not bool(self.msr[2] & 32)
+
+    def set_watchdog(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xdf
+        self.msr[2] |= 0x20 if not val else 0x00
+
+    def get_watchdog_idle(self):
+        return not bool(self.msr[2] & 8)
+
+    def set_watchdog_idle(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xf7
+        self.msr[2] |= 0x08 if not val else 0x00
+
+    def get_watchdog_prescale(self):
+        return 2 ** (((self.msr[2]) & 0x07) + 1)
+
+    def set_watchdog_prescale(self, val):
+        val = Utils.to_int(val)
+        wd_vals = {2: 0, 4: 1, 8: 2, 16: 3, 32: 4, 64: 5, 128: 6, 256: 7}
+        if val not in wd_vals.keys():
+            raise ValueError("must be one of %s" % list(wd_vals.keys()))
+        self.msr[2] &= 0xf8
+        self.msr[2] |= wd_vals[val]
+
+    def get_lvrs(self):
+        return bool(self.msr[1] & 64)
+
+    def set_lvrs(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0xbf
+        self.msr[1] |= 0x40 if val else 0x00
+
+    def get_eeprom_lvd(self):
+        return bool(self.msr[1] & 128)
+
+    def set_eeprom_lvd(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0x7f
+        self.msr[1] |= 0x80 if val else 0x00
+
+    def get_low_voltage(self):
+        return self.msr[1] & 0x07
+
+    def set_low_voltage(self, val):
+        val = Utils.to_int(val)
+        if val not in range(0, 8):
+            raise ValueError("must be one of %s" % list(range(0, 8)))
+        self.msr[1] &= 0xf8
+        self.msr[1] |= val
+
+    def get_ee_erase(self):
+        return not bool(self.msr[12] & 2)
+
+    def set_ee_erase(self, val):
+        val = Utils.to_bool(val);
+        self.msr[12] &= 0xfd
+        self.msr[12] |= 0x02 if not val else 0x00
+
+    def get_pindetect(self):
+        return not bool(self.msr[12] & 1)
+
+    def set_pindetect(self, val):
+        val = Utils.to_bool(val);
+        self.msr[12] &= 0xfe
+        self.msr[12] |= 0x01 if not val else 0x00
+
+
+class Stc15Option(BaseOption):
+    def __init__(self, msr):
+        assert len(msr) >= 4
+        self.msr = bytearray(msr)
+
+        self.options = (
+            ("reset_pin_enabled", self.get_reset_pin_enabled, self.set_reset_pin_enabled),
+            ("clock_source", self.get_clock_source, self.set_clock_source),
+            ("clock_gain", self.get_clock_gain, self.set_clock_gain),
+            ("watchdog_por_enabled", self.get_watchdog, self.set_watchdog),
+            ("watchdog_stop_idle", self.get_watchdog_idle, self.set_watchdog_idle),
+            ("watchdog_prescale", self.get_watchdog_prescale, self.set_watchdog_prescale),
+            ("low_voltage_reset", self.get_lvrs, self.set_lvrs),
+            ("low_voltage_threshold", self.get_low_voltage, self.set_low_voltage),
+            ("eeprom_lvd_inhibit", self.get_eeprom_lvd, self.set_eeprom_lvd),
+            ("eeprom_erase_enabled", self.get_ee_erase, self.set_ee_erase),
+            ("bsl_pindetect_enabled", self.get_pindetect, self.set_pindetect),
+            ("por_reset_delay", self.get_por_delay, self.set_por_delay),
+            ("rstout_por_state", self.get_p33_state, self.set_p33_state),
+            ("uart2_passthrough", self.get_uart_passthrough, self.set_uart_passthrough),
+            ("uart2_pin_mode", self.get_uart_pin_mode, self.set_uart_pin_mode),
+        )
+
+        if len(msr) > 4:
+            self.options += ("cpu_core_voltage", self.get_core_voltage, self.set_core_voltage),
+
+    def get_reset_pin_enabled(self):
+        return not bool(self.msr[2] & 16)
+
+    def set_reset_pin_enabled(self, val):
+        val = Utils.to_bool(val);
+        self.msr[2] &= 0xef
+        self.msr[2] |= 0x10 if not bool(val) else 0x00
+
+    def get_clock_source(self):
+        source = bool(self.msr[2] & 0x01)
+        return "internal" if source else "external"
+
+    def set_clock_source(self, val):
+        sources = {"internal": 1, "external": 0}
+        if val not in sources.keys():
+            raise ValueError("must be one of %s" % list(sources.keys()))
+        self.msr[2] &= 0xfe
+        self.msr[2] |= sources[val]
+
+    def get_clock_gain(self):
+        gain = bool(self.msr[2] & 0x02)
+        return "high" if gain else "low"
+
+    def set_clock_gain(self, val):
+        gains = {"low": 0, "high": 1}
+        if val not in gains.keys():
+            raise ValueError("must be one of %s" % list(gains.keys()))
+        self.msr[2] &= 0xfd
+        self.msr[2] |= gains[val] << 1
+
+    def get_watchdog(self):
+        return not bool(self.msr[0] & 32)
+
+    def set_watchdog(self, val):
+        val = Utils.to_bool(val);
+        self.msr[0] &= 0xdf
+        self.msr[0] |= 0x20 if not val else 0x00
+
+    def get_watchdog_idle(self):
+        return not bool(self.msr[0] & 8)
+
+    def set_watchdog_idle(self, val):
+        val = Utils.to_bool(val);
+        self.msr[0] &= 0xf7
+        self.msr[0] |= 0x08 if not val else 0x00
+
+    def get_watchdog_prescale(self):
+        return 2 ** (((self.msr[0]) & 0x07) + 1)
+
+    def set_watchdog_prescale(self, val):
+        val = Utils.to_int(val)
+        wd_vals = {2: 0, 4: 1, 8: 2, 16: 3, 32: 4, 64: 5, 128: 6, 256: 7}
+        if val not in wd_vals.keys():
+            raise ValueError("must be one of %s" % list(wd_vals.keys()))
+        self.msr[0] &= 0xf8
+        self.msr[0] |= wd_vals[val]
+
+    def get_lvrs(self):
+        return not bool(self.msr[1] & 64)
+
+    def set_lvrs(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0xbf
+        self.msr[1] |= 0x40 if not val else 0x00
+
+    def get_eeprom_lvd(self):
+        return bool(self.msr[1] & 128)
+
+    def set_eeprom_lvd(self, val):
+        val = Utils.to_bool(val);
+        self.msr[1] &= 0x7f
+        self.msr[1] |= 0x80 if val else 0x00
+
+    def get_low_voltage(self):
+        return self.msr[1] & 0x07
+
+    def set_low_voltage(self, val):
+        val = Utils.to_int(val)
+        if val not in range(0, 8):
+            raise ValueError("must be one of %s" % list(range(0, 8)))
+        self.msr[1] &= 0xf8
+        self.msr[1] |= val
+
+    def get_ee_erase(self):
+        return bool(self.msr[3] & 2)
+
+    def set_ee_erase(self, val):
+        val = Utils.to_bool(val);
+        self.msr[3] &= 0xfd
+        self.msr[3] |= 0x02 if val else 0x00
+
+    def get_pindetect(self):
+        return not bool(self.msr[3] & 1)
+
+    def set_pindetect(self, val):
+        val = Utils.to_bool(val);
+        self.msr[3] &= 0xfe
+        self.msr[3] |= 0x01 if not val else 0x00
+
+    def get_por_delay(self):
+        delay = bool(self.msr[2] & 128)
+        return "long" if delay else "short"
+
+    def set_por_delay(self, val):
+        delays = {"short": 0, "long": 1}
+        if val not in delays.keys():
+            raise ValueError("must be one of %s" % list(delays.keys()))
+        self.msr[2] &= 0x7f
+        self.msr[2] |= delays[val] << 7
+
+    def get_p33_state(self):
+        return "high" if self.msr[2] & 0x08 else "low"
+
+    def set_p33_state(self, val):
+        val = Utils.to_bool(val)
+        self.msr[2] &= 0xf7
+        self.msr[2] |= 0x08 if val else 0x00
+
+    def get_uart_passthrough(self):
+        return bool(self.msr[2] & 0x40)
+
+    def set_uart_passthrough(self, val):
+        val = Utils.to_bool(val)
+        self.msr[2] &= 0xbf
+        self.msr[2] |= 0x40 if val else 0x00
+
+    def get_uart_pin_mode(self):
+        return "push-pull" if bool(self.msr[2] & 0x20) else "normal"
+
+    def set_uart_pin_mode(self, val):
+        delays = {"normal": 0, "push-pull": 1}
+        if val not in delays.keys():
+            raise ValueError("must be one of %s" % list(delays.keys()))
+        self.msr[2] &= 0xdf
+        self.msr[2] |= 0x20 if val else 0x00
+
+    def get_core_voltage(self):
+        if self.msr[4] == 0xea: return "low"
+        elif self.msr[4] == 0xf7: return "mid"
+        elif self.msr[4] == 0xfd: return "high"
+        else: return "unknown"
+
+    def set_core_voltage(self, val):
+        volt_vals = {"low": 0xea, "mid": 0xf7, "high": 0xfd}
+        if val not in volt_vals.keys():
+            raise ValueError("must be one of %s" % list(volt_vals.keys()))
+        self.msr[4] = volt_vals[val]