📄 os_cpu_a.asm
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;********************************************************************************************************
; uC/OS-II
; The Real-Time Kernel
;
; (c) Copyright 1992-1999, Jean J. Labrosse, Weston, FL
; All Rights Reserved
;
; Infineon C16x/C164CI
; Extended Architecture Specific Code
; LARGE MEMORY MODEL
;
;
; Module Title : uC/OS-II C16x (for C164CI-8EM)
; System Platform : Target System Infineon C164CI-8EM Unit :ELIB
; Compile with : TASKING C166/ST10 V6.0 R5 Cross-Assembler
; Author : Michael Awosika
; Date : 27 September 1999
; Revision : 1.00
; File Name : OS_CPU_A.ASM
; Description : This uC/OS-II port is intended for Infineon Technologies
; C16x Extended Architecture Micro Controller Targets (C164CI-8EM)
;********************************************************************************************************
$DEBUG ;设置目标模块中包括调试信息
$SEGMENTED ;使用分段模式
$CASE ;区分大小写
$MOD167
$INCLUDE (REG164.INC)
NAME OS_CPU_C16x ;定义模块的名称
ASSUME DPP1:NDATA
ASSUME DPP3:SYSTEM ;声明对象所使用的DPP
; REGBAS REGBANK R0
; COMAREA COMREG R1 - R15
; 1 [State] = 2 * 1/ f CPU [s] for f CPU = variable
; = 100 [ns] for f CPU = 20 MHz
TOS EQU 0FBFEH ; top of system stack
MESS_INT EQU 0x32 ; 核扫描中断
RTC_INT EQU 0x43 ; 始终节怕中断
INDEX_INT EQU 0x24 ; 索引脉冲中断
REJECT_INT EQU 0x38 ; 剔除控制结束
EJECT_INT EQU 0x39 ; 取样控制结束
;"==================================================================
;" Macro for Saving a Task's Complete Context
;"==================================================================
%*DEFINE (SaveContext())
(
PUSH PSW ; Save Interrupting PSW
MOV [-R0],R1 ; Save R1
MOV [-R0],R2 ; Save R2
MOV [-R0],R3 ; Save R3
MOV [-R0],R4 ; Save R4
MOV [-R0],R5 ; Save R5
MOV [-R0],R6 ; Save R6
MOV [-R0],R7 ; Save R7
MOV [-R0],R8 ; Save R8
MOV [-R0],R9 ; Save R9
MOV [-R0],R10 ; Save R10
MOV [-R0],R11 ; Save R11
MOV [-R0],R12 ; Save R12
MOV [-R0],R13 ; Save R13
MOV [-R0],R14 ; Save R14
MOV [-R0],R15 ; Save R15
MOV R4,CP ; Get Context Pointer (CP)
MOV [-R0],R4 ; Put it on the user stack
MOV R4,DPP3 ; Get Data Page Pointer 3 (DPP3)
MOV [-R0],R4 ; Put it on the user stack
MOV R4,DPP2 ; Get Data Page Pointer 2 (DPP2)
MOV [-R0],R4 ; Put it on the user stack
MOV R4,DPP0 ; Get Data Page Pointer 0 (DPP0)
MOV [-R0],R4 ; Put it on the user stack
MOV R4,MDC ; Get Multiply/Divide Control (MDC)
MOV MDC,#0010h ; Clear the MDC refister to restart new multiplication
MOV [-R0],R4 ; Put it on the user stack
MOV R4,MDH ; Get Multiply/Divide High (MDH)
MOV [-R0],R4 ; Put it on the user stack
MOV R4,MDL ; Get Multiply/Divide Low (MDL)
MOV [-R0],R4 ; Put it on the user stack
POP R4 ; Get current PSW of the Interrupting task
MOV [-R0],R4 ; Put PSW on user stack
)
;@"===================================================================
;@" Macro for Restoring a Task's Context
;@"===================================================================
%*DEFINE (RestoreContext())
LOCAL next(
MOV R1,[R0+] ; Get PSW of the Interrupting task
JNB R1.5,%next ; Verify if the MULIP Flag was set
BSET PSW.5 ; The Mulip Flag was set, set the mulip in current PSW
%next:
MOV R1,[R0+] ; Restore MDL
MOV MDL,R1 ;
MOV R1,[R0+] ; Restore MDH
MOV MDH,R1 ;
MOV R1,[R0+] ; Restore MDC
MOV MDC,R1 ;
MOV R1,[R0+] ; Restore DPP0
MOV DPP0,R1 ;
MOV R1,[R0+] ; Restore DPP2
MOV DPP2,R1 ;
MOV R1,[R0+] ; Restore DPP3
MOV DPP3,R1 ;
MOV R1,[R0+] ; Restore CP
MOV CP,R1 ;
NOP
MOV R15,[R0+] ; Restore R15
MOV R14,[R0+] ; Restore R14
MOV R13,[R0+] ; Restore R13
MOV R12,[R0+] ; Restore R12
MOV R11,[R0+] ; Restore R11
MOV R10,[R0+] ; Restore R10
MOV R9,[R0+] ; Restore R9
MOV R8,[R0+] ; Restore R8
MOV R7,[R0+] ; Restore R7
MOV R6,[R0+] ; Restore R6
MOV R5,[R0+] ; Restore R5
MOV R4,[R0+] ; Restore R4
MOV R3,[R0+] ; Restore R3
MOV R2,[R0+] ; Restore R2
MOV R1,[R0+] ; Restore R1
)
;********************************************************************************************************
; External Code
;********************************************************************************************************
EXTERN OSIntExit:FAR
EXTERN OSTimeTick:FAR
EXTERN OSTaskSwHook:FAR
EXTERN OSIntEnter:FAR
EXTERN MessDealWith:FAR
EXTERN Index_IDW:FAR
EXTERN RTC_SoftIDW:FAR
;********************************************************************************************************
; External Data
;********************************************************************************************************
EXTERN OSIntNesting:BYTE
EXTERN OSPrioHighRdy:BYTE
EXTERN OSPrioCur:BYTE
EXTERN OSRunning:BYTE
EXTERN OSTCBCur:WORD
EXTERN OSTCBHighRdy:WORD
UCOS_C16X SECTION CODE WORD PUBLIC 'CPROGRAM'
PUBLIC OSStartHighRdy
PUBLIC OSCtxSw
PUBLIC OSIntCtxSw
PUBLIC OSTickISR
UCOS_C16X ENDS
;********************************************************************************************************
; START MULTITASKING
; void OSStartHighRdy (void)
;
; Note : OSStartHighRdy() MUST:
; a) Call OSTaskSwHook() then,
; b) Set OSRunning to TRUE.
;
; The user stack frame of the task to start looks as follows:
;
; TASK STACK AREA (High Memory)
; +12 TASK DATA PARAMETER PAGE pointer
; +10 TASK DATA PARAMETER OFFSET pointer
; +0E SEGMENT of task code address
; +0C OFFSET of task code address
; +0A USER STACK OFFSET POINTER (R0) of task
; +08 USER STACK PAGE POINTER (DPP1) of task
; +06 PSW flags of task
; +04 OFFSET of task code address
; +02 SEGMENT of task code address
; OSTCBHighRdy->OSTCBStkPtr --> 0
; -02 R[1 ..15] General Purpose registers of task
; -20 CP Context pointer of task
; -22 DPP3 Data page pointer 3 of task
; -24 DPP2 Data page pointer 2 of task
; -26 DPP0 Data page pointer 0 of task
; -28 MDC Multiply/Divide Control of task
; -2A MDH Multiply/Divide High register of task
; -2C MDL Multiply/Divide Low register of task (Low Memory)
;********************************************************************************************************
UCOS_C16X SECTION CODE
OSStartHighRdy PROC FAR
CALLS SEG(OSTaskSwHook),SOF(OSTaskSwHook)
_ADDR00:
MOVB RL1,#01h ; Indicate that multitasking has started
EXTP #PAG OSRunning,#01h
MOVB POF OSRunning,RL1
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