fasong1.c

来自「串口调试程序」· C语言 代码 · 共 81 行

//ICC-AVR application builder : 2007-4-28 16:03:07
// Target : M128
// Crystal: 14.7456Mhz

#include <iom128v.h>
#include <macros.h>
char i;

void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0xFF;
 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;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9600 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSR0B = 0x00; //disable while setting baud rate
 UCSR0A = 0x00;
 UCSR0C = 0x06;
 UBRR0L = 0x5F; //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
UDR0=UDR0;
}

#pragma interrupt_handler uart0_tx_isr:21
void uart0_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
 port_init();
 uart0_init();

 MCUCR = 0x00;
 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();
while(1)
{
}

}