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2021-1-16 16:09 上傳
- #include "Head.h"
- void main (void)
- {
- OSCCON=0b11110000;
- TRISD=0;
- PORTD=0;
- TRISC=0b10000000;
- OPTION_REG=0b10001000;
- INTCON=0b11100000;
- PIE1=0b00100000;//開串口中斷
- CCP1CON=0b00001100;
- PR2=255;
- T2CON=0b00000100;// 最大脈沖寬度 4*(255+1)=1024
- TXSTA=0b00100100; //SYNC=0;BRGH=1;
- RCSTA=0b10010000;
- BAUDCON=0b00001000; //BRG16=1;
- SPBRGH=0;
- SPBRG=207; //FOSC/[4(n+1)] (32000000/38400)/4-1=207
- while(1)
- {
- Send();
- }
- }
- //定時器中斷程序
- void interrupt TMR0INT(void)//4/32*256=32us
- {
- static unsigned char a=0,b=0,c=0;
- static unsigned int pwm_duty=0;
- const unsigned int pwm_1[PI_data]={0,13,25,37,50,62,74,85,96,107,118,127,137,146,154,162,
- 169,175,181,186,190,194,196,198,200,200,200,198,196,194,190,186,
- 181,175,169,162,154,146,137,127,118,107,96,85,74,62,50,37,
- 25,13};
- const unsigned int pwm_2[PI_data]={0,31,63,94,124,155,184,213,241,268,294,319,342,364,385,405,
- 422,438,452,465,476,484,491,496,499,500,499,496,491,484,476,465,
- 452,438,422,405,385,364,342,319,294,268,241,213,184,155,124,94,
- 63,31};
- const unsigned int pwm_3[PI_data]={0,63,125,187,249,309,368,426,482,536,588,637,685,729,771,809,
- 844,876,905,930,951,969,982,992,998,1000,998,992,982,969,951,930,
- 905,876,844,809,771,729,685,637,588,536,482,426,368,309,249,187,
- 125,63};
-
- if(T0IF)
- {
- T0IF=0;
- LATD6^=1;
- if(++a==Pwm_frequency) //1000000/(Pwm_frequency*32*50)=頻率HZ 1000000/(6*32*50)=104HZ
- {
- a=0;
- if(++b==PI_data)b=0;
- switch(c)
- {
- case 1: {pwm_duty=pwm_1;break;}
- case 2: {pwm_duty=pwm_2;break;}
- case 3: {pwm_duty=pwm_3;break;}
- default: {pwm_duty=pwm_1;break;}
- } CCP1CON=(CCP1CON&0xcf)|((pwm_duty&3)<<4);CCPR1L=pwm_duty>>2;
- }
- }
-
- if(RCIF)
- {
- static unsigned char temp=0;
- if(OERR==1){CREN=0;asm("nop");CREN=1;}
- temp=RCREG;
- switch(temp)
- {
- case 'a':{Pwm_frequency++;break;}//頻率加
- case 'b':{if(Pwm_frequency)Pwm_frequency--;break;}//頻率減
- case 'c':{c++;if(c>3)c=1;break;}//振動幅度
- }
- }
- }
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