DSP281x_CodeStartBranch.asm
上传用户:qingfan3
上传日期:2014-10-27
资源大小:31439k
文件大小:2k
- ;//###########################################################################
- ;//
- ;// FILE: DSP281x_CodeStartBranch.asm
- ;//
- ;// TITLE: Branch for redirecting code execution after boot.
- ;//
- ;//###########################################################################
- ;//
- ;// Ver | dd mmm yyyy | Who | Description of changes
- ;// =====|=============|======|===============================================
- ;// 1.00| 11 Sep 03 | L.H. | Updated based on D.A source to allow
- ;// | | | disabling the watchdog before branching to
- ;// | | | the C init routine. This is useful if the
- ;// | | | watchdog is timing out before main() is reached.
- ;//###########################################################################
- ***********************************************************************
- WD_DISABLE .set 1 ;set to 1 to disable WD, else set to 0
- .ref _c_int00
- ***********************************************************************
- * Function: codestart section
- *
- * Description: Branch to code starting point
- ***********************************************************************
- .sect "codestart"
- code_start:
- .if WD_DISABLE == 1
- LB wd_disable ;Branch to watchdog disable code
- .else
- LB _c_int00 ;Branch to start of boot.asm in RTS library
- .endif
- ;end codestart section
- ***********************************************************************
- * Function: wd_disable
- *
- * Description: Disables the watchdog timer
- ***********************************************************************
- .if WD_DISABLE == 1
- .text
- wd_disable:
- SETC OBJMODE ;Set OBJMODE for 28x object code
- EALLOW ;Enable EALLOW protected register access
- MOVZ DP, #7029h>>6 ;Set data page for WDCR register
- MOV @7029h, #0068h ;Set WDDIS bit in WDCR to disable WD
- EDIS ;Disable EALLOW protected register access
- LB _c_int00 ;Branch to start of boot.asm in RTS library
- .endif
- ;end wd_disable
- .end
-
- ; end of file CodeStartBranch.asm