?? pwm._c
字號:
//ICC-AVR application builder : 2006-5-30 11:33:48
// Target : M128
// Crystal: 8.0000Mhz
#include <iom128v.h>
#include <macros.h>
void timer3_init(void)
{
TCCR3B = 0x00; //stop
TCNT3H = 0xFF; //setup
TCNT3L = 0x38;
OCR3AH = 0x00;
OCR3AL = 0xC8;
ICR3H = 0x00;
ICR3L = 0xC8;
TCCR3A = 0x81;
TCCR3B = 0x11; //start Timer
}
#pragma interrupt_handler timer3_compa_isr:27
void timer3_compa_isr(void)
{
OCR3AH = 0x00;
OCR3AL = 0xC8;
//compare occured TCNT3=OCR3A
}
#pragma interrupt_handler timer3_ovf_isr:30
void timer3_ovf_isr(void)
{
//TIMER3 has overflowed
ICR3H = (speed*400)/256;
ICR3L = (speed*400)%256;
TCNT3H = 0xFF; //reload counter high value
TCNT3L = 0x38; //reload counter low value
}
//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
XDIV = 0x00; //xtal divider
XMCRA = 0x00; //external memory
port_init();
timer3_init();
MCUCR = 0x00;
EICRA = 0x00; //extended ext ints
EICRB = 0x00; //extended ext ints
EIMSK = 0x00;
TIMSK = 0x00; //timer interrupt sources
ETIMSK = 0x14; //extended timer interrupt sources
SEI(); //re-enable interrupts
//all peripherals are now initialized
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -