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init.s
Upload User: yzchenlin
Upload Date: 2022-03-09
Package Size: 712k
Code Size: 1k
Category:
ARM-PowerPC-ColdFire-MIPS
Development Platform:
C/C++
- ;=========================================
- ; NAME: INIT.S
- ; DESC: C start up codes
- ; HISTORY: 2007.02.14
- ;=========================================
- IMPORT testMain ; The main entry of C program
- AREA Init,CODE,READONLY
- ENTRY
- b ResetHandler ;
- HandlerUndef
- b HandlerUndef ;handler for Undefined mode
- HandlerSWI
- b HandlerSWI ;handler for SWI interrupt
- HandlerPabort
- b HandlerPabort ;handler for PAbort
- HandlerDabort
- b HandlerDabort ;handler for DAbort
- b . ;reserved
- HandlerIRQ
- b HandlerIRQ ;handler for IRQ interrupt
- HandlerFIQ
- b HandlerFIQ ;handler for FIQ interrupt
- ResetHandler
- ldr r0,=0x53000000 ;Watch-dog timer mode
- ldr r1,=0x0
- str r1,[r0]
- ldr r0,=0x4a000008 ;Interrupt mask control
- ldr r1,=0xffffffff ;all interrupt disable
- str r1,[r0]
- ldr r0,=0x4a00001c ;Interrupt sub mask
- ldr r1,=0x7ff ;all sub interrupt disable
- str r1,[r0]
- ldr r0,=0x4c000000 ;PLL lock time counter
- ldr r1,=0xffffff ;To adjust the LOCKTIME register
- str r1,[r0]
- ldr r0,=0x4c000004 ;MPLL Control
- ldr r1,=((0x5c <<12)+(0x4<<4)+0x2) ;Fin=12MHz,Fout=50MHz
- str r1,[r0]
- bl testMain ;c program.
- b .
- END