32kpwm.c

用于凌阳单片机SPCE061A上的波形产生算法

volatile unsigned int *P_IOA_Data = (unsigned int*)(0x7000);
volatile unsigned int *P_IOA_Buffer = (unsigned int*)(0x7001);
volatile unsigned int *P_IOA_Dir = (unsigned int*)(0x7002);
volatile unsigned int *P_IOA_Attrib = (unsigned int*)(0x7003);
volatile unsigned int *P_IOB_Data = (unsigned int*)(0x7005);
volatile unsigned int *P_IOB_Dir = (unsigned int*)(0x7007);
volatile unsigned int *P_IOB_Attrib = (unsigned int*)(0x7008);
volatile unsigned int *P_Watchdog_Clear = (unsigned int*)(0x7012);
volatile unsigned int *P_TimerA_Data = (unsigned int*)(0x700A);
volatile unsigned int *P_TimerA_Ctrl = (unsigned int*)(0x700B);
volatile unsigned int *P_TimerB_Data = (unsigned int*)(0x700C);
volatile unsigned int *P_TimerB_Ctrl = (unsigned int*)(0x700D);
volatile unsigned int *P_System_clock = (unsigned int*)(0x7013);
volatile unsigned int *P_INT_CTRL = (unsigned int*)(0x7010);
volatile unsigned int *P_INT_CLEAR = (unsigned int*)(0x7011);
volatile unsigned int *P_ADC_Ctrl = (unsigned int*)(0x7015);
volatile unsigned int *P_ADC_MUX_Ctrl = (unsigned int*)(0x702B);
volatile unsigned int *P_ADC_MUX_DATA = (unsigned int*)(0x702C);
volatile unsigned int *P_Flash_Ctrl = (unsigned int*)(0x7555);
volatile unsigned int *P_Flash_Store = (unsigned int*)(0x8001);

int flag=0;
void main(){
	*P_IOB_Dir=0x0300;
	*P_IOB_Attrib=0x0300;
	*P_IOB_Data=0x0000;
	//*P_TimerA_Ctrl=0x0230;
	//*P_TimerA_Data=0xffca;						//	PWM32.7KHz
	*P_System_clock=0x0080;
	*P_INT_CTRL=0x0010;
	__asm("int irq");
	while(1){
		//if(flag){
		//	*P_TimerA_Ctrl=0x0230;
		//	*P_TimerA_Data=0xffca;
		//}
		//else
		//	*P_TimerA_Ctrl=0x0030;
			
                     		*P_Watchdog_Clear=0x0001;
	}
}
		
void IRQ4(void)__attribute__((ISR));
void IRQ4(void){
	if(*P_INT_CTRL&0x0010){
		flag=flag^0x0001;
		if(flag){
			*P_TimerA_Ctrl=0x0230;
			*P_TimerA_Data=0xffd9;
		}
		else
			*P_TimerA_Ctrl=0x0030;
			
		*P_INT_CLEAR=0x0010;
	}
	__asm("int irq");
}