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標(biāo)題: 關(guān)于msp430定時(shí)器中斷的一些理解 [打印本頁]

作者: hanhanhanpipipi 時(shí)間: 2023-7-22 20:03
標(biāo)題: 關(guān)于msp430定時(shí)器中斷的一些理解
TIMER_A_STOP_MODETIMER_A_UP_MODE          //增計(jì)數(shù)模式計(jì)數(shù)到CCR0,置0重計(jì)
TIMER_A_CONTINUOUS_MODE    //連續(xù)計(jì)數(shù)模式    連續(xù)計(jì)數(shù)，計(jì)數(shù)到0FFFFh之后從0開始重新計(jì)數(shù)，無法更改頻率
TIMER_A_UPDOWN_MODE       //增減計(jì)數(shù)模式 0-ccr-0定時(shí)器中斷分為TAIE中斷與CCIFG0中斷：TAIE中斷是計(jì)數(shù)值到達(dá)CCR0（或者CCR1）時(shí)會(huì)產(chǎn)生中斷，CCIFG0中斷是定時(shí)器溢出時(shí)產(chǎn)生中斷（在歸0的那瞬間）。其分別對(duì)應(yīng)的中斷服務(wù)函數(shù)為：
#pragma vector=TIMER0_A0_VECTOR__interruptvoid TIMER0_A0_ISR (void)
{ GPIO_toggleOutputOnPin(GPIO_PORT_P4, GPIO_PIN1);}#pragma vector=TIMER0_A1_VECTOR__interruptvoid TIMER0_A1_ISR (void){ switch(TA0IV) {       case TA0IV_NONE:          break;       case TA0IV_TACCR1:          break;       case TA0IV_TACCR2:          break;       case TA0IV_TACCR3:          break;       case TA0IV_TACCR4:          break;       case TA0IV_5:          break;       case TA0IV_6:          break;       case TA0IV_TAIFG:          GPIO_toggleOutputOnPin(GPIO_PORT_P4, GPIO_PIN1);//此為等于CCR0時(shí)          break;       default:          break; }}

Timer_A_setCompareValue(TIMER_A0_BASE,TIMER_A_CAPTURECOMPARE_REGISTER_1,6249);//更改CCR1的值，但在CCR1產(chǎn)生中斷其頻率只與CCR0有關(guān)，更改CCR0無法改變其頻率周期

Timer_A_enableCaptureCompareInterrupt(TIMER_A0_BASE,TIMER_A_CAPTURECOMPARE_REGISTER_1);//使能CCR1中斷定時(shí)器的初始化函數(shù)：
void Timer_A_Init(void){ Timer_A_initUpModeParam htim = {0}; htim.clockSource = TIMER_A_CLOCKSOURCE_SMCLK; //時(shí)鐘源選為SMCLK = 1048576 HZ
htim.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_32; //32分頻 32768
htim.timerPeriod = 16384 - 1;                                  //計(jì)數(shù)值設(shè)為16374（32768/2=16374）,定時(shí)0.5s
htim.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_ENABLE; //使能TALE中斷
htim.captureCompareInterruptEnable_CCR0_CCIE = TIMER_A_CCIE_CCR0_INTERRUPT_DISABLE;
htim.timerClear = TIMER_A_DO_CLEAR; //把定時(shí)器的定時(shí)計(jì)數(shù)器，分頻計(jì)數(shù)器的計(jì)數(shù)值清零
htim.startTimer = true; //初始化后立即啟動(dòng)定時(shí)器 //配置定時(shí)器A為增計(jì)數(shù)模式
Timer_A_initUpMode(TIMER_A0_BASE, &htim);}

作者: ullx20 時(shí)間: 2023-7-26 11:24
很清晰的講解

作者: Torie 時(shí)間: 2024-1-2 13:21
要是代碼排版好一點(diǎn)就更完美了

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