DS1202 Platform

Hardware Devices Covered by This Platform

RAM	22,271 bytes for application variables and data
Flash	983,040 bytes for application and data storage (shared flash memory)
EEPROM	2,040 bytes for application data

Platform type	16-bit platform
Clock frequency (CLOCK) and clock control	PLL on (default): 88.4736Mhz PLL off: 11.0592Mhz
Available network interfaces	Ethernet (net.), PPP (ppp.), PPPoE (pppoe.)⁽¹⁾
GPIO type	Unidirectional⁽²⁾
UART limitations	Maximum practical baudrate of ~921,600bps
Serial port FIFOs	16 bytes for TX, 16 bytes for RX
Serial port line configuration	Depends on the serial port mode
Serial port interrupts and io.intenabled	Independent
RTS/CTS remapping	Supported⁽³⁾
ADC	NO
Pulse-width Modulation (PWM)	NO
GA1000 support	No
WA2000 support	No
GA1000 and WA2000 lines remapping	This platform does not support Wi-Fi at all
beep.divider calculation	N/A (buzzer not provided)
Recommended buzzer frequency divider	N/A (buzzer not provided)
Display type selection and line remapping	Display not supported
Special configuration section of the EEPROM	28 bytes for MAC and device password storage
Device serial number⁽⁵⁾	128 bytes: 64 OTP bytes + 64 fixed bytes⁽⁴⁾
Flash memory configuration	Shared
Self-upgrades for Tibbo BASIC/C applications	Supported through the fd.copyfirmware, fd.copyfirmwarelzo, and fd.copyfirmwarefromfile methods
Status LEDs (LED Control Lines)	Two green status (SG) LEDs (side and top) Two red status (SR) LEDs (side and top) Yellow Ethernet status (EY) LED Green Ethernet status (EG) LED
Debug communications	Ethernet / UDP Broadcast transport Ethernet / WinPCap transport

The sock.allowedinterfaces property refers to the Ethernet interface as "NET," PPP as "PPP," and PPPoE as "PPPOE." The sock.targetinterface and sock.currentinterface properties rely on the pl_sock_interfaces enum, whose members differ depending on the platform.
Surrounding board hardware dictates which GPIO lines must be used as inputs and which as outputs.
The hardware of this platform supports serial channels, which means that the CTS/RTS and DTR/DSR pairs of the DB9 connector can also be used as the RX/TX pairs of additional serial channels. Therefore, it is up to you to decide which lines are used as RTS and CTS, and which channels they will belong to. Proper mapping will be required to implement each particular arrangement.
Older DS1202 devices did not contain the serial number. To find out if your DS1202 has the serial number onboard, try to read it with the sys.serialnum R/O property. If this property returns an empty string, then the serial number is not present, otherwise it will return all 128 bytes of the serial number. The first 64 bytes are one-time-programmable (OTP) with the sys.setserialnum method.

button — monitors the MD line (setup button)
fd — manages flash memory file system and direct sector access
io — handles I/O lines, ports, and interrupts
net — controls the Ethernet port
pat — "plays" patterns on a pair of LEDs
ppp — provides access to the Internet over a serial modem (GPRS, POTS, etc.)
pppoe — provides access to the Internet over an ADSL modem
romfile — facilitates access to resource files (fixed data)
ser — in charge of the serial ports (on this device, serial channels of the RS232 port)
sock — socket communications (up to 16 UDP, TCP, and HTTP sessions)
ssi — implements up to four serial synchronous interface (SSI) channels, supports SPI, I²C, clock/data, etc.
stor — provides access to the EEPROM
sys — in charge of general device functionality

This platform supports the standard set of variable types and functions (a.k.a. "syscalls").

Enum pl_redir — The list of constants that define buffer redirection (shorting) for this platform
Enum pl_io_num — The list of constants that define available I/O lines
Enum pl_io_port_num — The list of constants that define available 8-bit I/O ports
Enum pl_int_num — The list of constants that define available interrupt lines
Enum pl_sock_interfaces — The list of available network interfaces