DSP28335定时器和外部输入中断

小黄豆

外部中断初始化; o, l' U* H2 L1 V& g #include "extint.h" //按键和外部中断都用了GPIO13,查询和中断不能同时使用, {. T- _$ }/ [8 X6 @9 [$ f7 S' \ void InitExtInt(void) {3 Q  ?, E- V& m6 \+ s8 i      EALLOW;3 K% I) m& G3 ]. n0 ^      GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 0;      GpioCtrlRegs.GPADIR.bit.GPIO13 = 0;           //作为输入IO口' q5 T# E/ \+ J& \  |5 a GpioCtrlRegs.GPAQSEL1.bit.GPIO13= 0;          //和时钟同步0 w/ j+ g: x& a6 B9 t# T/ _  d      GpioIntRegs.GPIOXINT1SEL.bit.GPIOSEL = 13;    //选择GPIO13为外部输入XINT1输入引脚6 g$ F* o% _9 L" P# l) ~5 o XIntruptRegs.XINT1CR.bit.POLARITY= 0;         //下降沿触发中断 XIntruptRegs.XINT1CR.bit.ENABLE = 1;          //使能XINT1中断 EDIS;9 G. E1 J& f/ b& @ }% Z0 \9 d4 k2 C& v. w! T //外部中断1服务函数  ，按下按键，进中断，亮灯响鸣4 |/ s$ c8 N3 @2 D% d interrupt void ISRExint1(void) {# {" B$ M1 E! y         PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;9 N' n5 t2 \% d( j  w DELAY_US(1000);/ Q; F# [( ^+ j! ]7 C if(GpioDataRegs.GPADAT.bit.GPIO13 == 0). p: P* p, s! M' @! _& S {: p3 Q, Y- r' ]% y) _# U: O2 T" l     LED4=~LED4;     BUZZ_ON     DELAY_US(100000);' ^  [: ?& m3 f: u     BUZZ_OFF       DELAY_US(100000);     BUZZ_ON     DELAY_US(100000);2 P" ~( _* ?6 U5 G2 z3 o9 X7 e     BUZZ_OFF& {/ W: M5 m0 Z( a4 ^' m$ X) Y, r     }4 ^4 d! a7 C7 u( X# } } 1 |& E: L) g/ Q& P- V 定时器0，1，2中断初始化     InitCpuTimers();   // For this example, only initialize the Cpu Timers     ConfigCpuTimer(&CpuTimer0, 150, 500000);  // 500us 150MHz CPU Freq, 1 second Period (in uSeconds)5 n6 E% q* s" m$ R$ _9 G/ Z     ConfigCpuTimer(&CpuTimer1, 150, 1000000);; G+ i6 u; [3 }     ConfigCpuTimer(&CpuTimer2, 150, 3000000);: n& O' H6 G5 D( Z. ~- T7 z     StartCpuTimer0();     StartCpuTimer1();     StartCpuTimer2(); $ Y& B6 \; s$ k5 C: H #include "timer.h" interrupt void ISRTimer0(void)% \" n! f( q: P8 [% E' r2 U {! s) G6 P; C% }( k. g6 i     static u8 timer0_count=0; // Acknowledge this interrupt to receive more interrupts from group 1     PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //0x0001赋给12组中断ACKnowledge寄存器，对其全部清除，不接受其他中断     CpuTimer0Regs.TCR.bit.TIF=1; // 定时到了指定时间，标志位置位，清除标志     CpuTimer0Regs.TCR.bit.TRB=1;  // 重载Timer0的定时数据6 j' r& n! a, Y 9 l. w" e- z  P9 @2 Y     timer0_count++;     if(timer0_count==4)  //2000ms =2s     {     timer0_count =0;! Y  ?' E) ?# y5 X     LED1=~LED1;     }: G0 s# c* |$ Q9 {. C }# P; S) p( ^. j9 |9 d # Y# V+ l  E8 F# O6 T //1s interrupt void ISRTimer1(void)+ R3 m( H& W$ t* T2 z! E" w# W: d {     static u8 timer1_count=0; // Acknowledge this interrupt to receive more interrupts from group 1     //PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //0x0001赋给12组中断ACKnowledge寄存器，对其全部清除，不接受其他中断$ r8 P$ a$ {) [- ]6 B4 a     CpuTimer1Regs.TCR.bit.TIF=1; // 定时到了指定时间，标志位置位，清除标志     CpuTimer1Regs.TCR.bit.TRB=1;  // 重载Timer0的定时数据0 d3 ^6 S8 f) _1 Y( J) k; M     timer1_count++;( I8 l9 _+ F* a' M0 u     if(timer1_count==1)     {     timer1_count =0;     LED2=~LED2;& X4 a6 o- o( _- N     }1 F' }/ O: [! ~6 N } //3s interrupt void ISRTimer2(void) {     static u8 timer2_count=0; // Acknowledge this interrupt to receive more interrupts from group 1     PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //0x0001赋给12组中断ACKnowledge寄存器，对其全部清除，不接受其他中断     CpuTimer2Regs.TCR.bit.TIF=1; // 定时到了指定时间，标志位置位，清除标志9 W* F+ |# g* P& L$ o, x" d* t2 Z     CpuTimer2Regs.TCR.bit.TRB=1;  // 重载Timer0的定时数据 9 Q) h- n- p: Q1 w9 h     timer2_count++;7 q- _9 y% g. m  S) k! D% c' h     if(timer2_count==1)$ s1 H* u$ o6 J6 a; W% o     {6 ]: ~/ x/ T/ E0 }) @/ O- l     timer2_count =0;     //LED3=~LED3;' L3 e: b. B; B; w7 ?$ k) Z: s     } } 0 `& K. D3 M8 i5 E* H, ~ 指定中断服务函数地址      EALLOW;  //  protected registers, ?5 C0 \1 E% X# A1 M" Y0 X/ C     PieVectTable.XINT1 = &ISRExint1;  //外部中断1服务程序     PieVectTable.TINT0 = &ISRTimer0;   //定时器0中断服务" W: d& m% }- L( ~     PieVectTable.XINT13 = &ISRTimer1;   //定时器1中断服务: i. J( C+ m# F     PieVectTable.TINT2  =  &ISRTimer2;    //定时器2中断服务6 x( O8 S+ p/ Q3 b; ~4 t- t6 X, y4 y     EDIS;    // This is needed to disable write to EALLOW protected registers 5 d" o( F: W) R) {/ s 开CPU级中断* P. M0 L# T+ M; H     IER |= M_INT1;    //开启CPU中断 组1     IER |= M_INT13;   //开启CPU中断 13   XINT13 / CPU-Timer1     IER |= M_INT14;   //开启CPU中断 组14 TINT2     7 {& @8 f7 x! C* [* [     PieCtrlRegs.PIEIER1.bit.INTx7= 1;  //CPU定时器 TIMER0中断   组1的第4个中断使能     CpuTimer1Regs.TCR.all = 0x4001; // 使能TIMER1 Use write-only instruction to set TSS bit = 0+ O$ A" j3 v! v2 ?  v     CpuTimer2Regs.TCR.all = 0x4001; // 使能TIMER2 Use write-only instruction to set TSS bit = 0; }: G2 W0 D# c, ~3 I+ R% ^( @' ?1 ~     EINT;   //开启全局中断9 A/ z1 s& O! O4 S- i0 D! k$ L* B     ERTM;   //开启全局实时中断，调试用DBGM