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4-13 ETM 輸出 PWM

4-13 ETM 輸出 PWM. HT66F50. ETM (Standard type TM) 提供 5 種模式. Compare match output Timer/Counter PWM output Input Capture Single pulse output. ETM. 10bit upcounter (TM1D[9:0]) 由 T1CK[2:0] 選擇不同時脈緣 與 TM1A[9:0], TM1B[9:0], T1RP[2:0] 比較. ETM 模式有 CCR 暫存器 (TM1A, TM1B)

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4-13 ETM 輸出 PWM

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  1. 4-13 ETM輸出PWM HT66F50

  2. ETM (Standard type TM)提供5種模式 • Compare match output • Timer/Counter • PWM output • Input Capture • Single pulse output

  3. ETM • 10bit upcounter (TM1D[9:0]) 由 T1CK[2:0] 選擇不同時脈緣 與 TM1A[9:0], TM1B[9:0], T1RP[2:0] 比較

  4. ETM 模式有CCR暫存器 (TM1A, TM1B) • TM1C1,TM1C2,TM1C0三個特殊暫存器設定工作模式,計數時脈源

  5. 2-5-3 ETM 模式操作於Compare match output • 當T1CCLR=1,PWM之Duty cycle由TM1A及TM1B控制,波型由TP1B腳位輸出,TP1A強制為一般IO • 當T1CCLR=0,支援雙通道PWM輸出,由TP1A,TP1B腳位輸出,週期由T1RP[2:0]決定, TM1A及TM1B控制TP1A,TP1B, PWM之佔空比

  6. TM1C0 控制暫存器 T1PAU T1CK2 T1CK1 T1CK0 T1ON T1RP2 T1RP1 T1RP0 Bit 7 6 5 4 3 2 1 0 Bit [2 1 0 ] ; TnRP2 TnRP1 TnRP0 = 000 , 週期= 1024x fINT-1 =100,週期= 512x fINT-1 = 001 ,週期= 128x fINT-1 =101 ,週期= 640x fINT-1 = 010 ,週期= 256x fINT-1 =110 ,週期= 768x fINT-1 = 011 ,週期= 384x fINT-1 =111 ,週期= 896x fINT-1

  7. 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

  8. TM2C0 控制暫存器 TnPAU TnCK2 TnCK1 TnCK0 TnON - - - Bit 7 6 5 4 3 2 1 0 Bit 2:0 保留

  9. 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

  10. 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

  11. TM2C1 控制暫存器 TnM1 TnM0 TnIO1 TnIO0 TnOCTnPOL TnDPX TnCCLR Bit 7 6 5 4 32 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

  12. 4-13 pwm ;PROGRAM : 4-13.ASM ;FUNCTION: pwm by etm #INCLUDE HT66F50.INC #INCLUDE 4-13.INC ;-------------------------------------------------------------------- MY_DATA .SECTION 'DATA' ;== DATA SECTION == DEL1 DB ? DEL2 DB ? DEL3 DB ? INDEX DB ? ;-------------------------------------------------------------------- MY_CODE .SECTION AT 0 'CODE' ;== PROGRAM SECTION == ORG 00H ;HT-66XX RESET VECTOR

  13. MOV A,08h ; MOV CP0C,A ; Disable cp0 MOV CP1C,A ; Disable cp1 CLR ACERL ;Disable ADC input SET SW_BRIGHTC SET SW_DARKC SET SW_BRIGHTPU SET SW_DARKPU MOV A,01110000B ;set TP1B_[0:2] as TP1 fun. MOV TMPC0,A MOV A,00000000B ;fint=fsys/4 MOV TM1C0,A

  14. MOV A,10000001B ;TM1A in PWM o/p mode MOV TM1C1,A ;TM1D is cleared by TM1A compare match MOV A,10101000B ;TP1B is working in PWM o/p mode MOV TM1C2,A ;active high, non-invert, edge-aligned MOV A,LOW 1024-1 ;SET DUTY 1024 us MOV TM1AL,A MOV A,HIGH 1024-1 MOV TM1AH,A MOV A,11011100B ;SET TP1B[012] as output mode ANDM A,PCC ANDM A,PC ;select non-inverted MOV A,5 MOV INDEX, A SET T1ON ;start ETM

  15. MAIN: MOV A,INDEX ADD A,OFFSET TAB_PWM MOV TBLP, A TABRDL TM1BL ;load TM1CCRB indexed by index MOV A,TBLH MOV TM1BH,A CALL DELAY ;delay 0.5sec WAIT: SNZ SW_BRIGHT ;SW_BRIGHT pressed? JMP BRIGHTER ;yes SNZ SW_DARK ;NO. SW_DARK pressed? JMP WAIT ;NO

  16. DARKER: DECA INDEX ;yes. Index-1 SZ ACC.7 ;less than 0? JMP WAIT ;yes MOV INDEX,A JMP MAIN BRIGHTER: INCA INDEX ;yes. Index+1 SUB A,10 SZ C ;>=10 JMP WAIT ;yes INC INEDX ;NO. INDEX+1 JMP MAIN

  17. 50*10ms DELAY PROC MOV A,50 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

  18. ORG LASTPAGE TAB_PWM: DC 100 DC 200 DC 300 DC 400 DC 500 DC 600 DC 700 DC 800 DC 900 DC 1000

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