tms320f2812_tms320f2812中文手册_tms320f2812有哪些外设(2)

 1 ***********************************************************************
 2 *File:DSP281x_CodeStartBranch.asm
 3 *Apply to:F2810,F2811,F2812 devices.
 4 *Author: David Chan, WintechDigital System Inc.
 5 ***********************************************************************
 6 
 7 WD_DISABLE    .set    1        ;set to 1 to disable WD, else set to 0
 8 
 9     .ref _c_int00
10 
11 ***********************************************************************
12 * Function: codestart section
13 *
14 * Description: Branch to code starting point
15 ***********************************************************************
16 
17     .sect "codestart"
18 
19 code_start:
20     .if WD_DISABLE == 1
21         LB wd_disable       ;Branch to watchdog disable code
22     .else
23         LB _c_int00         ;Branch to start of boot.asm in RTS library
24     .endif
25 
26 ;end codestart section
27 
28 
29 ***********************************************************************
30 * Function: wd_disable
31 *
32 * Description: Disables the watchdog timer
33 ***********************************************************************
34     .if WD_DISABLE == 1
35 
36     .text
37 wd_disable:
38     SETC OMODE        ;Set OMODE for 28x object code
39     EALLOW              ;Enable EALLOW protected register access
40     MOVZ DP, #7029h>>6  ;Set data page for WDCR register
41     MOV @7029h, #0068h  ;Set WDDIS bit in WDCR to disable WD
42     EDIS                ;Disable EALLOW protected register access
43     LB _c_int00         ;Branch to start of boot.asm in RTS library
44 
45     .endif
46 
47 ;end wd_disable
48 
49 
50     .end
51     
52 ; end of file CodeStartBranch.asm

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