Filter
Top Products
90 www.xilinx.com PicoBlaze 8-bit Embedded Microcontroller
UG129 (v1.1.2) June 24, 2008
Appendix : Example Program Templates
R
pBlazIDE Syntax
Figure B-2 provides a code template for creating PicoBlaze applications using the
pBlazIDE assembler.
Figure B-2: PicoBlaze Application Program Template for KCPSM3 Assembler
<name> EQU sX ; Rename register sX with <name>
<name> EQU $00 ; Define constant <name>, assign value
; name ROM output file generated by pBlazIDE assembler
VHDL “template.vhd”, “target.vhd”, “entity_name”
<name> DSIN <port_id> ; Create input port, assign port address
<name> DSOUT <port_id>; Create output port, assign port address
<name> DSIO <port_id> ; Create readable output port,
; assign port address
ORG 0; Programs always start at reset vector 0
EINT ; If using interrupts, be sure to enable
; the INTERRUPT input
BEGIN:
; <<< your code here >>>
JUMP BEGIN ; Embedded applications never end
ISR: ; An Interrupt Service Routine (ISR) is
; required if using interrupts
; Interrupts are automatically disabled
; when an interrupt is recognized
; Never re-enable interrupts during the ISR
RETI ENABLE ; Return from interrupt service routine
; Use RETURNI DISABLE to leave interrupts
; disabled
ORG $3FF ; Interrupt vector is located at highest
; instruction address
JUMP ISR ; Jump to interrupt service routine, ISR