Transcript 4-10 STMTIMER

4-10 STM Timer/Counter 與比較
吻合輸出
HT66F50
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STM 內部結構
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STM (Standard type TM)提供5種模式
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Compare match
Timer/Counter
PWM
Input Capture
Single pulse output
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STM 模組編號 HT66F50 為TM2
STM寬度16bit
TM輸入腳位 TCK2
TM輸出腳位 TP2_0, TP2_1
透過特殊功能暫存器TMnC1 , TMnC2 設定
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• STM寬度16bit , TMnD[15:0]
• 藉由TnCK[2:0]選擇七種不同計數時脈
• 與TMnA[15:0] 或TNRP[7:0]比較
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• INCT0 (fig 4-10-3)
INT0F INT0E EMI [中斷名稱 INT0]
INT1F INT1E EMI [中斷名稱 INT1]
CP0F CP0E EMI [中斷名稱 Comparator 0]
• INCT1
CP1F
MF0F
MF1F
ADF
CP1E
MF0E
MF1E
ADE
EMI
EMI
EMI
EMI
[中斷名稱 Comparator 1]
[中斷名稱 Multi-function 0]
[中斷名稱 Multi-function 1]
[中斷名稱 A/D]
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• MFIO (fig 4-10-3)
T0PF TOPE [中斷名稱 TM0P]
T0AF T0AE
T2PF T2PE
T2AF T2AE
[中斷名稱 TM0A]
[中斷名稱 TM2P]
[中斷名稱 TM2A]
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INCT1 特殊功能暫存器
ADF MF1F MF0F CP1F ADE MF1F MF0E CP1E
Bit 7
6
5
4
3 2
1
0
MF0E 為致能複功能中斷 enable bits
對應 enable bits : T0PE, T0AE, T2PE, T2AE
與 STM CCRA 比對吻合中斷
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MFI0 特殊功能暫存器
T2AF T2PF T0AF T0PF T2AE T2PE T0AE T0PE
Bit 7
6
5
4
3
2
1
0
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TM2C0 控制暫存器(表2-5-18)
n=2 for HT66F50
TnPAU TnCK2 TnCK1 TnCK0 TnON TnRP2 TnRP1 TnRP0
Bit 7
6
5
4
3
2
1
0
Bit [7] ; TnPAU
= 1, 暫停計數
= 0, 繼續計數
Bit [6 5 4] ; TnCK2 TnCK1 TnCK0
= 000 , fINT= fsys/4
=100, fINT= fINT
= 001 , fINT= fsys
=101 ,保留
= 010 , fINT= fsys/16
=110 , fINT=TCKn
= 011 , fINT= fsys/64
=111 , fINT= TCKn’
Bit [3] ;TnON
=1 ,開始計數
=0,停止計數
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TM2C0 控制暫存器
TnPAU TnCK2 TnCK1 TnCK0 TnON
-
-
-
Bit 7
2
1
0
6
5
4
3
Bit 2:0 保留 [0 0 0]
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TM2C1 控制暫存器
TnM1 TnM0 TnIO1 TnIO0 TnOC TnPOL TnDPX TnCCLR
Bit 7
6
5
4
3
2
1
0
Bit [7 6] ; TnM1 TnM0
= 00 , STM為比對吻合輸出模式
= 01 , STM為輸入補捉模式
= 10 , STM為PWM / single pulse mode
= 11 , STM為計時/計數
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TM2C1 控制暫存器
TnM1 TnM0 TnIO1 TnIO0 TnOC TnPOL TnDPX TnCCLR
Bit 7
6
5
4
3
2
1
0
Bit [5 4] ; TnIO[1:0]: TP2_0, TP2_1 為功能選擇位元
若STM為比對吻合輸出
T2M[1:0]=00 TP2_0, TP2_1 為輸出
00: 比對吻合時,輸出不變
10: 比對吻合時,輸出高態
01: 比對吻合時,輸出低態
11: 比對吻合時,輸出轉態
若STM為比對輸入補捉
T2M[1:0]=01 TP2_0, TP2_1 為輸入
00: 在TP2_0, TP2_1輸入為正緣時,記錄TM2D
01: 在TP2_0, TP2_1輸入為負緣時,記錄TM2D
10: 在TP2_0, TP2_1輸入為負緣及正緣時,記錄TM2D
11: 停止輸入補捉功能
若STM為PWM/Single Pulse Mode, T2M[1:0]=10
00: 強制輸出為非啟動
10: PWM輸出
01: 強制輸出為啟動
11: Single Pulse Mode
若STM為計時/計數, T2M[1:0]=11
無作用
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TM2C1 控制暫存器
TnM1 TnM0 TnIO1 TnIO0 TnOC TnPOL TnDPX TnCCLR
Bit 7
6
5
4
3
2
1
0
Bit [3] ; TnOC
輸出準位控制位元
若STM為比對吻合輸出
TP2M[1:0]=00
1: 首次比對吻合前,輸出維持在1
0:首次比對吻合前,輸出維持在0
若STM為PWM/Single Pulse Mode, T2M[1:0]=10
1: 輸出啟動準位為1
0: 輸出啟動準位為0
Bit [2] ; TnPOL
輸出極性控制位元
1: 輸出反向
0: 輸出不反向
Bit [0] ; TnCCLR
=1, 當比較器A 比對吻合時清除計數器
=0,當比較器p 比對吻合時或計數器溢位清除計數器
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4-10.ASM
(fig 4-10-2)
;PROGRAM : 4-10.ASM
;FUNCTION: GENERATE TONE DO-DO BY TIME INTERRUPT SKILL OF STM
#INCLUDE
HT66F50.INC
#INCLUDE
4-10.INC
;===========================================================
MY_DATA
.SECTION
'DATA' ;==DATA SECTION==
DEL1
DB
? ;DELAY LOOP COUNT1
DEL2
DB
? ;DELAY LOOP COUNT2
DEL3
DB
? ;DELAY LOOP COUNT3
COUNT
DB
? ;PITCH COUNT
STACK_A
DB
? ;STACK BUFFER FOR ACC
STACK_STATUS
DB
? ;STACK BUFFER FOR PSW
;===========================================================
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STM is 16 bit timer
MY_CODE
ORG
JMP
ORG
JMP
INIT:
CLR
SET
SET
CLR
MOV
MOV
CLR
CLR
SET
.SECTION
'CODE'
;==PROGRAM SECTION==
00H
;HT-66FX0 RESET VECTOR
INIT
14H
;HT-66FXX STM INTERRUPT VECTOR
ISR_STM
SPK_PORTC ;CONFIG SPK_PORT AS OUTPUT MODE
MF0E
;ENABLE [STM] INTERRUPT
T2AE
;ENABLE T2CCRA COMPARE INTERRUPT
TM2C0
;fINT=fSYS/4=1MHz
;Bit [6 5 4] ; TnCK2 TnCK1 TnCK0
;= 000 , fINT= fsys/4
A,11000001B ;STM IS IN THE TIMER/COUNTER MODE,
;Bit[7 6]=11 , STM為計時/計數
TM2C1,A
; Bit[0]=1, 當比較器A 比對吻合時清除計數器
;AND TP2CNT IS CLEARED BY TP2CCRA
; COMPARE MATCH
T2AF
;清除MF0F 與T2AE 中斷旗標
MF0F
EMI
;中斷總開關
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MAIN:
MOV
MOV
MOV
MOV
NEXT_PITCH:
TABRDL
MOV
MOV
SET
MOV
CALL
CLR
INC
SDZ
JMP
JMP
A,TAB_PITCH
TBLP,A
A,15
COUNT,A
;INITIAL TABLE POINTER
;SET COUNTER FOR PITCH TABLE
TM2AL ;LOAD PITCH TO TP2CCRA PE-LOAD REGISTER
A,TBLH
TM2AH,A ;PERLOAD TP2CCRA FOR HIGH 8-BIT
T2ON
;START GTPU COUNTING
A,40
;DELAY 0.4 SEC FOR EACH TONE
DELAY
T2ON
;STOP STM COUNTING
TBLP
;UPDATE TABLE POINTER
COUNT ;WERE ALL PITCH PLAYER?
NEXT_PITCH
;NO,NEXT PITCH
MAIN
;YES,RESTART
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;===================================================================
;
STM INTERRUPT SERVICE ROUTINE
;===================================================================
ISR_STM:
MOV
STACK_A,A
;PUSH A
MOV
A,STATUS
MOV
STACK_STATUS,A
;PUSH STATUS
CLR
T2AF
MOV
A,00010000B
XORM
A,SPK_PORT
;CONPLEMENT PC.4
MOV
A,STACK_STATUS
MOV
STATUS,A
;POP STATUS
MOV
A,STACK_A
;POP A
RETI
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;========================================================================================
; PROC
: DELAY
; FUNC
: DEALY ABOUT ACC*10mS @fSYS=4MHz
; PARA
: ACC : DELAY FACTOR
; REG
: DEL1,DEL2,DEL3
;========================================================================================
DELAY
PROC
MOV
DEL1,A
;SET DEL1 COUNTER
DEL_1: MOV
A,30
MOV
DEL2,A
;SET DEL2 COUNTER
DEL_2:
MOV
A,110
MOV
DEL3,A
;SET DEL3 COUNTER
DEL_3:
SDZ
DEL3
;DEL3 DOWN COUNT
JMP
DEL_3
SDZ
DEL2
;DEL2 DOWN COUNT
JMP
DEL_2
SDZ
DEL1
;DEL1 DOWN COUNT
JMP
DEL_1
RET
DELAY
ENDP
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ORG
TAB_PITCH:
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
DC
END
LASTPAGE
;DEFINE LASTPAGE
;PITCH CONSTANT FOR fINT=fSYS/4
fSYS/(523*2*4)
;DO TONE TIME COUNSTANT
fSYS/(587*2*4)
;RE TONE TIME COUNSTANT
fSYS/(659*2*4)
;MI TONE TIME COUNSTANT
fSYS/(698*2*4)
;FA TONE TIME COUNSTANT
fSYS/(785*2*4)
;SO TONE TIME COUNSTANT
fSYS/(880*2*4)
;LA TONE TIME COUNSTANT
fSYS/(998*2*4)
;TI TONE TIME COUNSTANT
fSYS/(523*2*2*4)
;DO. TONE TIME COUNSTANT
fSYS/(587*2*2*4)
;RE. TONE TIME COUNSTANT
fSYS/(659*2*2*4)
;ME. TONE TIME COUNSTANT
fSYS/(698*2*2*4)
;FA. TONE TIME COUNSTANT
fSYS/(785*2*2*4)
;SO. TONE TIME COUNSTANT
fSYS/(880*2*2*4)
;LA. TONE TIME COUNSTANT
fSYS/(998*2*2*4)
;TI. TONE TIME COUNSTANT
fSYS/(523*2*4*4)
;DO. TONE TIME COUNSTANT
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• 當CPU執行DELAY副程式時 STM仍繼續計
數
• 待其計數值與TM2A暫存器所設定之參數產
生比對吻合時 以中斷方式讓CPU跳至014h
執行
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