Texas Instruments TMS320C54x, User Manual

Page: 80 / 469

Source Listings
3-34
Example 3–4.Assembler Listing (Continued)
(b) Algebraic example
Field 1 Field 2 Field 3 Field 4
1 .global RESET, INT0, INT1, INT2
2 .global TINT, RINT, XINT, USER
3 .global ISR0, ISR1, ISR2
4 .global time, rcv, xmt, proc
5
6 initmac .macro
7 * initialize macro
8 OVM = 1 ; disable oflow
9 DP = #0 ; dp = 0
10 ARP = #7 ; arp = ar7
11 A = #037h ; acc = 03fh
12 INTM = 0 ; enable ints
13 .endm
14 *******************************************
15 * Reset and interrupt vectors *
16 *******************************************
17 000000 .sect ”reset”
18 000000 F073 RESET: goto init
000001 0008+
19 000002 F073 INT0: goto ISR0
000003 0000!
20 000004 F073 INT1: goto ISR1
000005 0000!
21 000006 F073 INT2: goto ISR2
000007 0000!
22
23
*
24 000000 .sect ”ints”
25 000000 F073 TINT goto time
000001 0000!
26 000002 F073 RINT goto rcv
000003 0000!
27 000004 F073 XINT goto xmt
000005 0000!
28 000006 F073 USER goto proc
000007 0000!
29
*******************************************
30 * Initialize processor. *
31 *******************************************
32 000008 init: initmac
1 * initialize macro
1 000008 F7B9 OVM = 1 ; disable oflow
1 000009 EA00 DP = #0 ; dp = 0
1 00000a F4A7 ARP = #7 ; arp = ar7
1 00000b E837 A = #037h ; acc = 03fh
1 00000c F6BB INTM = 0 ; enable ints