Parallax P2 Edge Module - Datasheet

Square Root

Use the QSQRT instruction on a 64-bit number and retrieve the square root CORDIC result with the GETQX

instruction.

(X, Y) Rotation

Use the SETQ instruction followed by the QROTATE instruction to rotate a 32-bit signed Y and X point pair by an

unsigned 32-bit angle and retrieve the CORDIC results with the GETQX and GETQY instructions for X and Y,

respectively.

(X, Y) to (length, angle)

Use the QVECTOR instruction to convert a (X, Y) cartesian coordinate into (length, angle) polar coordinate and

retrieve the CORDIC results with the GETQX and GETQY instructions (for length and angle, respectively).

(length, angle) to (X, Y)

Use the QROTATE instruction to convert a (length, angle) polar coordinate into (X, Y) cartesian coordinate and

retrieve the CORDIC results with the GETQX and GETQY instructions (for X and Y, respectively).

Logarithm

Use the QLOG instruction on an unsigned 32-bit integer and retrieve the 5:27-bit logarithm CORDIC result (5-bit

exponent and 27-bit mantissa) with the GETQX instruction.

Exponent

Use the QEXP instruction on a 5:27-bit logarithm and retrieve the unsigned 32-bit integer CORDIC result with the

GETQX instruction.

Smart I/O Pins

Every I/O pin features versatile digital and analog capabilities as well as autonomous state machine functions

that would otherwise require processor time to perform. The combination provides adept functionality for

application design, increasing the Propeller 2 potential beyond what multi-core architecture alone provides.

There are 24 low-level 'pin' modes and 34 high-level 'smart' modes.

Pin Modes

Each I/O pin has 13 low-level pin mode conﬁguration bits which determine the operation of its 3.3 V circuit. The

pin mode is set using the WRPIN instruction, where the 13 %MMMMMMMMMMMMM bits within the instruction's

D operand go directly to these bits. Note though that in some smart pin modes, these bits are partially overwritten

to set things like DAC values.

The format of the D operand value is:

%AAAA_BBBB_FFF_MMMMMMMMMMMMM_TT_SSSSS_0

● A = PINA input selector

● B = PINB input selector

● F = PINA and PINB input logic/ﬁltering (after PINA and PINB input selectors)

● M = pin mode

● T = pin DIR/OUT control (default = %00)

● S = smart mode