ATmega2560单片机12路PWM输出的程序

PWM模块设计说明：

使用ATmega2560单片机开发一个12路PWM输出的程序，要求每路PWM可以独立控制。通过串口指令控制某路PWM输出某个频率值（具体通道受指令第一字节控制），每路PWM的频率范围能在20-2000HZ范围内变化（具体频率值受指令第二字节控制），同时，还能够随时停止某路的输出。

指令要求：

A1 XX 第一路PWM连续输出占空比为50%不变的方波。

（XX为00时，停止输出，为01~FF时，输出20~2000HZ频率值，其中重点关照1000HZ以下，以5HZ为步进；1000-2000HZ以15HZ步进即可，以上要求的步进值并非十分严格，如果不易实现，可以稍微修改。）

以下均相同要求：

A2 XX 第二路。。。。

A3 XX 第三路。。。。

...............

AC XX 第十二路。。。。

初始上电时，各路均不输出。

avr单片机源程序：

#include "kernel.h"
unsigned int PWM_Buf[6];//6路PWM频率
unsigned long timer0_ticks;
unsigned long timer0_tickssec;
unsigned long timer1_ticks;
unsigned long timer1_ticksmin;
unsigned long timer2_ticks;
unsigned long timer2_tickssec;
unsigned long timer3_ticks;
unsigned long timer3_ticksmin;
unsigned long timer4_ticks;
unsigned long timer4_ticksmin;
unsigned long timer5_ticks;
unsigned long timer5_ticksmin;
void Timer0_Init(void)
{
timer0_ticks = 0;
timer0_tickssec = 0;
TCCR0A = 0x00;
TCCR0B = 0x00;
TCNT0 = 0x00;
OCR0A = F_CPU/(1024-1)/20;//频率F_PWM
OCR0B = OCR0A/2;//占空比50%
//TCCR0A = 0xA3; //COM0A1 COM0A0 COM0B1 COM0B0 – – WGM01 WGM00
TCCR0B = 0xCD; //FOC0A FOC0B – – WGM02 CS02 CS01 CS00
/*
TCCR0A = 0x00;
TCCR0B = 0x00;//stop
TCNT0 = 0xE7;//25us
OCR0A = 0x18;
OCR0B = 0x18;
TCCR0A = 0x03;
TCCR0B = 0x02;//start,clkT0S/8
TIMSK0|= 0x01;//enable 0verflow interrupt*/
}
void TC0_Set_PWM(unsigned int curF)
{//20~80为clkT0S/1024，80~300为clkT0S/256，300~2000为clkT0S/64
if(curF==0)
{
OCR0A = 0;
OCR0B = 0;
TCCR0A = 0;
}
else if((curF>=20)&&(curF<80))
{
OCR0A = F_CPU/(1024-1)/curF;
OCR0B = OCR0A/2;
TCCR0A = 0xA3;
TCCR0B = 0xCD;
}
else if((curF>=80)&&(curF<300))
{
OCR0A = F_CPU/(256-1)/curF;
OCR0B = OCR0A/2;
TCCR0A = 0xA3;
TCCR0B = 0xCC;
}
else if((curF>=300)&&(curF<=2000))
{
OCR0A = F_CPU/(64-1)/curF;
OCR0B = OCR0A/2;
TCCR0A = 0xA3;
TCCR0B = 0xCB;
}
}
void Timer1_Init(void)
{
unsigned int temp;
timer1_ticks = 0;
timer1_ticksmin = 0;
TCCR1A = 0x00;
TCCR1B = 0x00;
TCCR1C = 0x00;
TCNT1H = 0x00;
TCNT1L = 0x00;
temp = F_CPU/16/20;
OCR1A=temp;
//temp = temp/2;
//OCR1B=temp;
//OCR1C=temp;
//TCCR1A=(0< TCCR1B=(1< /*
TCCR1A = 0x00;//COM1A1 COM1A0 COM1B1 COM1B0 COM1C1 COM1C0 WGM11 WGM10
TCCR1B = 0x00;//stop,ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10
TCCR1C = 0x00;//FOC1A FOC1B FOC1C – – – – –
TCNT1H = 0xE3;
TCNT1L = 0xE0;
OCR1AH = 0x1C;
OCR1AL = 0x1F;
OCR1BH = 0x1C;
OCR1BL = 0x1F;
OCR1CH = 0x1C;
OCR1CL = 0x1F;
ICR1H = 0x00;
ICR1L = 0x00;
TCCR1B = 0x05;
// TIMSK |= 0x04;//enable 0verflow interrupt*/
}
void TC1_Set_PWM(unsigned int curF)
{
unsigned int temp;
if(curF==0)
{
//OCR1A = 0;
//OCR1B = 0;
TCCR1A=0;
}
else if((curF>=20)&&(curF<=2000))
{
temp = F_CPU/16/curF;
OCR1A=temp;
TCCR1A=(0< }
}
void Timer2_Init(void)
{
timer2_ticks = 0;
timer2_tickssec = 0;
TCCR2A = 0x00;
TCCR2B = 0x00;
TCNT2 = 0x00;
OCR2A = F_CPU/(1024-1)/20;//频率F_PWM
OCR2B = OCR2A/2;//占空比50%
//TCCR2A = 0xA3; //COM2A1 COM2A0 COM2B1 COM2B0 – – WGM21 WGM20
TCCR2B = 0xCF; //FOC2A FOC2B – – WGM22 CS22 CS21 CS20
// TCCR2 = 0x00;//stop,FOC2 WGM20 COM21 COM20 WGM21 CS22 CS21 CS20
// TCNT2 = 0xB8;//set count 10ms
// OCR2 = 0x47;
// TCCR2 = 0x05;//start,clkT0S/1024
// TIMSK|= 0x40;//enable 0verflow interrupt
}
void TC2_Set_PWM(unsigned int curF)
{//20~80为clkT0S/1024，80~300为clkT0S/256，300~2000为clkT0S/64
if(curF==0)
{
OCR2A = 0;
OCR2B = 0;
TCCR2A = 0;
}
else if((curF>=20)&&(curF<80))
{
OCR2A = F_CPU/(1024-1)/curF;
OCR2B = OCR2A/2;
TCCR2A = 0xA3;
TCCR2B = 0xCF;
}
else if((curF>=80)&&(curF<300))
{
OCR2A = F_CPU/(256-1)/curF;
OCR2B = OCR2A/2;
TCCR2A = 0xA3;
TCCR2B = 0xCE;
}
else if((curF>=300)&&(curF<=2000))
{
OCR2A = F_CPU/(64-1)/curF;
OCR2B = OCR2A/2;
TCCR2A = 0xA3;
TCCR2B = 0xCC;
}
}
void Timer3_Init(void)
{
unsigned int temp;
timer3_ticks = 0;
timer3_ticksmin = 0;
TCCR3A = 0x00;
TCCR3B = 0x00;
TCCR3C = 0x00;
TCNT3H = 0x00;
TCNT3L = 0x00;
temp = F_CPU/16/20;
OCR3A=temp;
//temp = temp/2;
//OCR3B=temp;
//OCR3C=temp;
//TCCR3A=(0< TCCR3B=(1< /*
TCCR3A = 0x00;//COM3A1 COM3A0 COM3B1 COM3B0 COM3C1 COM3C0 WGM31 WGM30
TCCR3B = 0x00;//stop,ICNC3 ICES3 – WGM33 WGM32 CS32 CS31 CS30
TCCR3C = 0x00;//FOC3A FOC3B FOC3C – – – – –
TCNT3H = 0xE3;
TCNT3L = 0xE0;//set count 1s
OCR3AH = 0x1C;
OCR3AL = 0x1F;
OCR3BH = 0x1C;
OCR3BL = 0x1F;
OCR3CH = 0x1C;
OCR3CL = 0x1F;
ICR3H = 0x00;
ICR3L = 0x00;
TCCR3B = 0x05;//start,clkT0S/1024
// ETIMSK|= 0x04;//enable 0verflow interrupt*/
}
void TC3_Set_PWM(unsigned int curF)
{
unsigned int temp;
if(curF==0)
{
//OCR3A = 0;
//OCR3B = 0;
TCCR3A=0;
}
else if((curF>=20)&&(curF<=2000))
{
temp = F_CPU/16/curF;
OCR3A=temp;
TCCR3A=(0< }
}
void Timer4_Init(void)
{
unsigned int temp;
timer4_ticks = 0;
timer4_ticksmin = 0;
TCCR4A = 0x00;
TCCR4B = 0x00;
TCCR4C = 0x00;
TCNT4H = 0x00;
TCNT4L = 0x00;
temp = F_CPU/16/20;
OCR4A=temp;
//temp = temp/2;
//OCR4B=temp;
//OCR4C=temp;
//TCCR4A=(0< TCCR4B=(1<}
void TC4_Set_PWM(unsigned int curF)
{
unsigned int temp;
if(curF==0)
{
//OCR4A = 0;
//OCR4B = 0;
TCCR4A=0;
}
else if((curF>=20)&&(curF<=2000))
{
temp = F_CPU/16/curF;
OCR4A=temp;
TCCR4A=(0< }
}
void Timer5_Init(void)
{
unsigned int temp;
timer5_ticks = 0;
timer5_ticksmin = 0;
TCCR5A = 0x00;
TCCR5B = 0x00;
TCCR5C = 0x00;
TCNT5H = 0x00;
TCNT5L = 0x00;
temp = F_CPU/16/20;
OCR5A=temp;
//temp = temp/2;
//OCR5B=temp;
//OCR5C=temp;
//TCCR5A=(0< TCCR5B=(1<}
void TC5_Set_PWM(unsigned int curF)
{
unsigned int temp;
if(curF==0)
{
//OCR5A = 0;
//OCR5B = 0;
TCCR5A=0;
}
else if((curF>=20)&&(curF<=2000))
{
temp = F_CPU/16/curF;
OCR5A=temp;
TCCR5A=(0< }
}
/*******************************************************************************
* Function Name : TIMER0_OVF_vectFunc
* Description : 定时器0溢出中断程序
* Input : None
* Output : None
* Return : None
*******************************************************************************/
#pragma vector = TIMER0_OVF_vect
__interrupt void TIMER0_OVF_vectFunc(void)
{
}
/*******************************************************************************
* Function Name : TIMER1_OVF_vectFunc
* Description : 定时器1溢出中断程序
* Input : None
* Output : None
* Return : None
*******************************************************************************/
#pragma vector = TIMER1_OVF_vect
__interrupt void TIMER1_OVF_vectFunc(void)
{
}
/*******************************************************************************
* Function Name : TIMER2_OVF_vectFunc
* Description : 定时器2溢出中断程序
* Input : None
* Output : None
* Return : None
*******************************************************************************/
#pragma vector = TIMER2_OVF_vect
__interrupt void TIMER2_OVF_vectFunc(void)
{
}
/*******************************************************************************
* Function Name : TIMER3_OVF_vectFunc
* Description : 定时器3溢出中断程序
* Input : None
* Output : None
* Return : None
*******************************************************************************/
#pragma vector = TIMER3_OVF_vect
__interrupt void TIMER3_OVF_vectFunc(void)
{
}

完整源码下载：

ATMEGA2560-PWM USART.zip

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