九齐单片机 NY8B062D 之TIM0的使用

太过爱你忘了你带给我的痛 2023-01-10 14:32 203阅读 0赞

1：基础知识。 (官方都提供了 整理一下是为了方便以后开发的时候查看）  
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2：寄存器的了解  
2.1 TOMD  
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2.2 对于 TOMD寄存器的配置
    //;------------------------------------------------------------ 
    //; P_TMR0_Ctrl (xxH) --------- T0MD Register
    //;------------------------------------------------------------
    //; C_TMR0_Clk C_TMR0_LowClk | Timer 0 Clock Source
    //;------------------------------------------------------------
    //; 0 x | From Instruction Clock
    //; 1 0 | From External Pin
    //; 1 1 | From Low Oscillator Frency (I_LRC or E_LXT)
    //;------------------------------------------------------------
    //;Bit[7,5:4] : Timer0 Clock Source Selection
    #define C_TMR0_LowClk 0x80 //; Same as LCKTM0 
    #define C_TMR0_Clk 0x20 //; Same as T0CS
    #define C_TMR0_ExtClk_Edge 0x10 //; Timer0 External Clock Edge Select --- 1:Falling Edge, 0:Rising Edge
    //;Bit[6] : Reserved
    //;Bit[3] : Watchdog Interrupt Source Selection / Timer0 Prescaler0 Selection
    #define C_PS0_WDT 0x08 //; Prescaler0 is assigned to WDT
    #define C_PS0_TMR0 0x00 //; Prescaler0 is assigned to TMR0
    //;Bit[2:0] : Prescaler0 Dividing Rate Selection
    #define C_PS0_Div 0x07 //; Prescaler0 Dividing Rate Selection
    #define C_PS0_Div2 0x00
    #define C_PS0_Div4 0x01
    #define C_PS0_Div8 0x02
    #define C_PS0_Div16 0x03
    #define C_PS0_Div32 0x04
    #define C_PS0_Div64 0x05
    #define C_PS0_Div128 0x06
    #define C_PS0_Div256 0x07
    //

测试代码

=========================================================================*/
    #include <ny8.h>
    #include "ny8_constant.h"
    #define UPDATE_REG(x) __asm__("MOVR _" #x ",F")
    
    void main(void)
    { 
    // Initialize System
    	DISI();											// Disable global interrupt
    	PCON = C_WDT_En | C_LVR_En;						// Enable WDT, Enable LVR
    
    // Initialize GPIO
    	IOSTB = 0xF8;									// PB0.PB1.PB2: output mode, others: input mode
    	PORTB = 0x07;									// PB0、PB1 & PB2 are output high
    // Initialize Timer0
    	PCON1 = C_TMR0_En;								// Enable Timer0
    	TMR0 = 0x00;									// TMR0[7:0] = 0x00
    	T0MD = C_PS0_TMR0 | C_PS0_Div8;					// Prescaler0 is assigned to Timer0, Prescaler0 dividing rate = 1:8, Timer0 clock source is instruction clock
    
    // Initialize Interrupt
    	INTE =  C_INT_TMR0;		// Enable Timer0、Timer1、WDT overflow interrupt
    	ENI();											// Enable global interrupt
    	while(1);
    }
    
    // Interrupt Service Routine
    void isr(void) __interrupt(0)
    { 
    	if(INTFbits.T0IF)
    	{ 
    		PORTBbits.PB0 ^=1;							// PB0 Toggle
    		INTF= (unsigned char)~(C_INT_TMR0);			// Clear T0IF
    	}
    }

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