我第一次使用ATMEGA128芯片，我用ICCAVR对一个简单的程序进行编译，然后用AVR STUDIO4.13下载到芯片然后运行，但是我发现程序在运行后跑飞了，我设置断点都不能停住，给我感觉就是程序进入子程序后竟然不能回到主程序了？请各位帮我看看是怎么回事，谢谢了，另程序附上
#include "Hardware.h"
#include <macros.h>
void WDT_off(void){
WDTCR = (1<<WDCE) | (1<<WDE);//置位WDCE 和 WDE
WDTCR = 0x00;//关闭WDT
}
void port_init(void)
{
PORTA = 0x00;
DDRA = 0x00;
PORTB = 0x00;
DDRB = 0x00;
PORTC = 0x00; //m103 output only
DDRC = 0x00;
PORTD = 0x00;
DDRD = 0x00;
PORTE = 0x00;
DDRE = 0x00;
PORTF = 0x00;
DDRF = 0x00;
PORTG = 0x00;
DDRG = 0x00;
}
//TIMER0 initialize - prescale:Stop
// WGM: Normal
// desired value: 1Hz
// actual value: Out of range
void timer0_init(void)
{
TCCR0 = 0x00; //stop
ASSR = 0x00; //set async mode
TCNT0 = 0x00 /*INVALID SETTING*/; //set count
OCR0 = 0x00 /*INVALID SETTING*/;
TCCR0 = 0x00; //start timer
}
//TIMER1 initialize - prescale:Stop
// WGM: 0) Normal, TOP=0xFFFF
// desired value: 1Hz
// actual value: Out of range
void timer1_init(void)
{
TCCR1B = 0x00; //stop
TCNT1H = 0x00 /*INVALID SETTING*/; //setup
TCNT1L = 0x00 /*INVALID SETTING*/;
OCR1AH = 0x00 /*INVALID SETTING*/;
OCR1AL = 0x00 /*INVALID SETTING*/;
OCR1BH = 0x00 /*INVALID SETTING*/;
OCR1BL = 0x00 /*INVALID SETTING*/;
OCR1CH = 0x00 /*INVALID SETTING*/;
OCR1CL = 0x00 /*INVALID SETTING*/;
ICR1H = 0x00 /*INVALID SETTING*/;
ICR1L = 0x00 /*INVALID SETTING*/;
TCCR1A = 0x00;
TCCR1B = 0x00; //start Timer
}
//TIMER2 initialize - prescale:Stop
// WGM: Normal
// desired value: 1Hz
// actual value: Out of range
void timer2_init(void)
{
TCCR2 = 0x00; //stop
TCNT2 = 0x00 /*INVALID SETTING*/; //setup
OCR2 = 0x00 /*INVALID SETTING*/;
TCCR2 = 0x00; //start
}
//TIMER3 initialize - prescale:Stop
// WGM: 0) Normal, TOP=0xFFFF
// desired value: 1Hz
// actual value: Out of range
void timer3_init(void)
{
TCCR3B = 0x00; //stop
TCNT3H = 0x00 /*INVALID SETTING*/; //setup
TCNT3L = 0x00 /*INVALID SETTING*/;
OCR3AH = 0x00 /*INVALID SETTING*/;
OCR3AL = 0x00 /*INVALID SETTING*/;
OCR3BH = 0x00 /*INVALID SETTING*/;
OCR3BL = 0x00 /*INVALID SETTING*/;
OCR3CH = 0x00 /*INVALID SETTING*/;
OCR3CL = 0x00 /*INVALID SETTING*/;
ICR3H = 0x00 /*INVALID SETTING*/;
ICR3L = 0x00 /*INVALID SETTING*/;
TCCR3A = 0x00;
TCCR3B = 0x00; //start Timer
}
//UART0 initialize
// desired baud rate: 115200
// actual: baud rate:115200 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
UCSR0B = 0x00; //disable while setting baud rate
UCSR0A = 0x00;
UCSR0C = 0x06;
UBRR0L = 0x01; //set baud rate lo
UBRR0H = 0x00; //set baud rate hi
UCSR0B = 0xD8;
}
#pragma interrupt_handler uart0_rx_isr:19
void uart0_rx_isr(void)
{
//uart has received a character in UDR
}
#pragma interrupt_handler uart0_tx_isr:21
void uart0_tx_isr(void)
{
//character has been transmitted
}
//UART1 initialize
// desired baud rate:9600
// actual baud rate:9600 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart1_init(void)
{
UCSR1B = 0x00; //disable while setting baud rate
UCSR1A = 0x00;
UCSR1C = 0x06;
UBRR1L = 0x17; //set baud rate lo
UBRR1H = 0x00; //set baud rate hi
UCSR1B = 0xD8;
}
#pragma interrupt_handler uart1_rx_isr:31
void uart1_rx_isr(void)
{
//uart has received a character in UDR
}
#pragma interrupt_handler uart1_tx_isr:33
void uart1_tx_isr(void)
{
//character has been transmitted
}
//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
WDT_off();
port_init();
// timer0_init();
// timer1_init();
// timer2_init();
// timer3_init();
uart0_init();
uart1_init();
MCUCR = 0x80;
EICRA = 0x00; //extended ext ints
EICRB = 0x00; //extended ext ints
EIMSK = 0x00;
TIMSK = 0x00; //timer interrupt sources
ETIMSK = 0x00; //extended timer interrupt sources
// SEI(); //re-enable interrupts
//all peripherals are now initialized
}
void main(void){
init_devices();
PORTE=0xff;
while(1);
} |
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