45205 Parallax Inc, 45205 Datasheet - Page 68
![SX TECH BOARD](/photos/28/95/289537/45205-l_sml.jpg)
45205
Manufacturer Part Number
45205
Description
SX TECH BOARD
Manufacturer
Parallax Inc
Type
MCUr
Datasheet
1.45180.pdf
(184 pages)
Specifications of 45205
Contents
Board
For Use With/related Products
SX MCUs
For Use With
28825 - MINI SOUND PLAYER SOUNDPAL130-28029 - KIT PARTS SMART SENSORS
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
- Current page: 68 of 184
- Download datasheet (2Mb)
7 The SASM Assembler
When this macro is used in a program to be run on an SX48/52, it is necessary that the symbol SX48_52
is defined prior to the first invocation of the _bank macro.
7.4.13 Macros with Formal Parameters by Name
This is an example for a macro with one named parameter:
When invoked with
the word “cycles” is replaced by 7 and the macro expands into
The macro operates by generating as many JMP $+1 instructions as possible to use the bulk of the delay
at a cost of one instruction word per three clock cycles then make up the balance with NOP instructions.
For example, delay 6 would not generate NOP instructions at all but just two jmp $+1 instructions,
where delay 8 would generate two jmp $+1 and two NOP instructions. In case of cycles = 0, no code is
generated at all.
7.5
Symbols are descriptive names for numeric values. Symbol names can consist of up to 32 alphanumeric
and underscore (_) characters and must start with a letter or underscore. SASM expects symbol
declarations to start in column 1 of the program line. Symbols for constants are usually defined near the
start of assembly source code using the equal directive EQU. For example:
Page 68 SX-Key/Blitz Development System Manual 2.0 Parallax, Inc.
Symbols
delay MACRO cycles
ENDM
delay 7
IF (7 > 0)
ENDIF
REPT (7/3)
ENDR
REPT (7//3)
ENDR
IF (cycles > 0)
ENDIF
jmp $+1
jmp $+1
nop
REPT (cycles/3)
ENDR
REPT (cycles//3)
ENDR
jmp $+1
nop
; delay 3 cycles
; delay 1 cycle
; delay 3 cycles
; delay 3 cycles
; delay 1 cycle
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