📄 pwm.asm
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.include "F2407REGS.H" ;引用头部文件
.def _c_int0
.data
TEMP .word 09Fh
MAX_VALUE .set 09Fh
.sect ".vectors" ;定义主向量段
RSVECT B _c_int0 ;PM 0 Reset Vector 1
INT1 B PHANTOM ;PM 2 Int level 1 4
INT2 B GISR2 ;PM 4 Int level 2 5
INT3 B PHANTOM ;PM 6 Int level 3 6
INT4 B PHANTOM ;PM 8 Int level 4 7
INT5 B PHANTOM ;PM A Int level 5 8
INT6 B PHANTOM ;PM C Int level 6 9
RESERVED B PHANTOM ;PM E (Analysis Int) 10
SW_INT8 B PHANTOM ;PM 10 User S/W int -
SW_INT9 B PHANTOM ;PM 12 User S/W int -
SW_INT10 B PHANTOM ;PM 14 User S/W int -
SW_INT11 B PHANTOM ;PM 16 User S/W int -
SW_INT12 B PHANTOM ;PM 18 User S/W int -
SW_INT13 B PHANTOM ;PM 1A User S/W int -
SW_INT14 B PHANTOM ;PM 1C User S/W int -
SW_INT15 B PHANTOM ;PM 1E User S/W int -
SW_INT16 B PHANTOM ;PM 20 User S/W int -
TRAP B PHANTOM ;PM 22 Trap vector -
NMI B PHANTOM ;PM 24 Non maskable Int 3
EMU_TRAP B PHANTOM ;PM 26 Emulator Trap 2
SW_INT20 B PHANTOM ;PM 28 User S/W int -
SW_INT21 B PHANTOM ;PM 2A User S/W int -
SW_INT22 B PHANTOM ;PM 2C User S/W int -
SW_INT23 B PHANTOM ;PM 2E User S/W int -
SW_INT24 B PHANTOM ;PM 30 User S/W int -
SW_INT25 B PHANTOM ;PM 32 User S/W int -
SW_INT26 B PHANTOM ;PM 34 User S/W int -
SW_INT27 B PHANTOM ;PM 36 User S/W int -
SW_INT28 B PHANTOM ;PM 38 User S/W int -
SW_INT29 B PHANTOM ;PM 3A User S/W int -
SW_INT30 B PHANTOM ;PM 3C User S/W int -
SW_INT31 B PHANTOM ;PM 3E User S/W int -
.sect ".pvecs" ;定义子向量段
PVECTORS
B PHANTOM ;Reserved pvector addr offset-0000h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0005h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-000ah
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0010h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0015h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-001Ah
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0020h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0025h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;pvector addr offset 0x027h - T1PINT中断
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-002Ah
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B T3GP_ISR ;pvector addr offset 0x02f - T3PINT
B PHANTOM ;Reserved pvector addr offset-0030h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-0035h
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-003aAh
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset
B PHANTOM ;Reserved pvector addr offset-003Fh
B PHANTOM ;pvector addr offset 0x040h - CAN接收中断
B PHANTOM ;Reserved pvector addr offset-0041h
.text
_c_int0
CALL SYSINIT ;系统初始化程序
CALL PWM_INIT ;EVB模块PWM初始化程序
WAIT
NOP
B WAIT
SYSINIT:
SETC INTM
CLRC SXM
CLRC OVM
CLRC CNF ;B0区被配置为数据空间
LDP #0E0H ;指向7000h～7080h区
SPLK #81FEH, SCSR1 ;时钟4倍频, CLKIN=10 M, CLKOUT=40 M
SPLK #0E8H, WDCR ;不使能WDT
LDP #0
SPLK #0002H, IMR ;使能中断第2级INT2
SPLK #0FFFFH, IFR ;清全部中断标志
RET
PWM_INIT:
LDP #DP_PF2 ;指向7080h～7100h区
LACL MCRC
OR #007EH ;IOPE[1～6]被配置为基本功能方式: PWM[7～12]
SACL MCRC
LDP #DP_EVB ;指向7500h～7580h区
SPLK #0FFFFH, EVBIFRA ;清EVB 全部中断标志
SPLK #0666H, ACTRB ;PWM12, 10, 8 低有效, PWM11, 9, 7 高有效
SPLK #00H, DBTCONB ;不使能死区控制
;**************************************************************************
SPLK #90H, CMPR4 ;设置比较初值 PWM7高电平占50/100,
;低电平占10/100
;修改该值可以改变PWM8的占空比，即输出电压的改变
;**************************************************************************
SPLK #20H, CMPR5 ;设置PWM9, 10的比较寄存器
SPLK #30H, CMPR6 ;设置PWM11, 12的比较寄存器
SPLK #100H, T3PR ;设置定时器3周期寄存器,
;即PWM周期为60个CPU时钟周期
SPLK #0A600H, COMCONB ;使能比较操作
SPLK #0, T3CNT
SPLK #41H, GPTCONB ;TCOMPOE=1, T3PIN=01
SPLK #080H, EVBIMRA ;通用定时器3使能
SPLK #0174EH, T3CON ;TMODE=10 连续增计数模式, TPS=111 预分频为128
;TENABLE=1 定时器计数使能,TCLKS=00
;内部时钟
;TECMPR=1 定时器3比较使能,SELT3PR=0
CLRC INTM ;开总中断
RET
GISR2: ;优先级INT2中断入口
;保护现场
LDP #0E0H
LACC PIVR, 1 ;读取外设中断向量寄存器（PIVR）, 并左移一位
ADD #PVECTORS ;加上外设中断入口地址
BACC ;跳到相应的中断服务子程序
T3GP_ISR: ;通用定时器3中断入口
LDP #DP_B01
LACC TEMP
LDP #DP_EVB
SACL CMPR4 ;重新设置比较初值，使之输出锯齿波
SUB #1
BCND GISR2_RET, NEQ
LACC #MAX_VALUE
GISR2_RET:
;中断返回
;恢复现场
LDP #DP_B01
SACL TEMP
LDP #DP_EVB
SPLK #0, T3CNT
SPLK #080H, EVBIFRA
CLRC INTM ;开总中断, 因为一进中断就自动关闭总中断
RET
PHANTOM
;KICK_DOG ;复位看门狗
RET
END
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