19

LTC1407/LTC1407A

1407f

APPLICATIO S I FOR ATIO

;

———————mask and shift input data ——————————————

bufull:

b = *ar3+ << -0

; load acc b with BSP buffer and shift right -0

b = #07FFFh & b

; mask out the TRISTATE bits with #03FFFh

;

*ar2+ = data(#0bh)

; store B to out buffer and advance AR2 pointer

TC = (@ar2 == #02000h)

; output buffer is 2k starting at 1800h

if (TC) goto start

; restart if out buffer is at 1fffh

goto bufull

;

—————————dummy bsend return————————————

bsend

return_enable

;this is also a dummy return to define bsend

;in vector table file BVECTORS.ASM

;

——————————— end ISR ——————————————

.copy “c:\dskplus\1407A\s2k14ini.asm”

;initialize buffered serial port

.space 16*32

;clear a chunk at the end to mark the end

;======================================================================

;

;

VECTORS

;

;======================================================================

.sect “vectors”

;The vectors start here

.copy “c:\dskplus\1407A\bvectors.asm”

;get BSP vectors

.sect “buffer”

;Set address of BSP buffer for clearing

.space 16*0x800

.sect “result”

;Set address of result for clearing

.space 16*0x800

.end

; ***************************************************************************

; File: BVECTORS.ASM -> Vector Table for the ‘C54x DSKplus

10.Jul.96

;

BSP vectors and Debugger vectors

;

TDM vectors just return

; ***************************************************************************

; The vectors in this table can be configured for processing external and

; internal software interrupts. The DSKplus debugger uses four interrupt

; vectors. These are RESET, TRAP2, INT2, and HPIINT.

;

*

DO NOT MODIFY THESE FOUR VECTORS IF YOU PLAN TO USE THE DEBUGGER

*

;

; All other vector locations are free to use. When programming always be sure

; the HPIINT bit is unmasked (IMR=200h) to allow the communications kernel and

; host PC interact. INT2 should normally be masked (IMR(bit 2) = 0) so that the

; DSP will not interrupt itself during a HINT. HINT is tied to INT2 externally.

;

;

;