DSP281x_XintfBootReset.asm
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上传日期:2014-10-27
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文件大小:2k
- ;//###########################################################################
- ;//
- ;// FILE: DSP281x_XintfBootReset.asm
- ;//
- ;// TITLE: Boot from XINTF Zone 7
- ;//
- ;// DESCRIPTION:
- ;//
- ;// This file includes the required setup for booting from XINTF Zone 7.
- ;//
- ;// The reset vector located at 0x3FFFC0 is set to either the watchdog
- ;// disable function or the entry point to the C routine.
- ;//
- ;// Use the linker file F2812_XintfBoot.cmd to properly map the reset vector.
- ;//
- ;// This file assumes the device is set to "boot from XINTF zone 7" and the
- ;// MP/MC pin is pulled high.
- ;//
- ;//###########################################################################
- ;//
- ;// Based on source from D.A.
- ;//
- ;// Ver | dd mmm yyyy | Who | Description of changes
- ;// =====|=============|======|===============================================
- ;// 1.00| 11 Sep 03 | L.H. | First release
- ;//###########################################################################
- WD_DISABLE .set 1 ;set to 1 to disable WD, else set to 0
- .ref _c_int00
- ***********************************************************************
- * Function: Reset vector for XINTF boot
- *
- ***********************************************************************
- .sect "reset_vec"
- reset_vec:
- .if WD_DISABLE == 1
- .long wd_disable ;Point reset to watchdog disable code
- .else
- .long _c_int00 ;Point reset 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 28x OBJECTMODE
- 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 XintfBootReset.asm