?? getascii.c
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//ICC-AVR application builder : 2006-3-8 15:48:09
// Target : M16
// Crystal: 8.0000Mhz
#include <iom16v.h>
#include <macros.h>
#define uchar unsigned char
#define uint unsigned int
void delay_1ms(void)//1ms延時函數(shù)
{
unsigned int i;
for (i=0;i<150;i++)
{
}
}
void delay_nms(unsigned int n)//延時n毫秒
{
unsigned int i;
for (i=0;i<n;i++)//執(zhí)行n次1毫秒延時
delay_1ms();
}
void ASCIISend(unsigned int ascVal)
{
UDR=ascVal;
while(!(UCSRA&0X40));
UCSRA|=0x40;
}
void sEnter(void)
{
ASCIISend(13);
ASCIISend(10);
}
void port_init(void)
{
PORTB = 0x00;
DDRB = 0x00;
PORTC = 0x00; //m103 output only
DDRC = 0x00;
PORTD = 0x00;
DDRD = 0x00;
}
//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
UCSRB = 0x00; //disable while setting baud rate
UCSRA = 0x00;
UCSRC = BIT(URSEL) | 0x06;
UBRRL = 0x03; //set baud rate lo
UBRRH = 0x00; //set baud rate hi
UCSRB = 0x98; //Enable Rx INT,Disable Tx INT.
//0xd8 to enable Rx&Tx INT;
}
#pragma interrupt_handler uart0_rx_isr:12
void uart0_rx_isr(void)
{
//uart has received a character in UDR
uchar tmpUDR,temp,tempyu;
tmpUDR=UDR;
temp=tmpUDR/100;
temp+=48;
UDR=temp;
while(!(UCSRA&0X40));
UCSRA|=0x40;
tempyu=tmpUDR%100;
temp=tempyu/10;
temp+=48;
UDR=temp;
while(!(UCSRA&0X40));
UCSRA|=0x40;
tempyu%=10;
temp=tempyu;
temp+=48;
UDR=temp;
while(!(UCSRA&0X40));
UCSRA|=0x40;
sEnter();
sEnter();
ASCIISend(62);
}
//#pragma interrupt_handler uart0_tx_isr:14
//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
port_init();
uart0_init();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00; //timer interrupt sources
SEI(); //re-enable interrupts
//all peripherals are now initialized
}
void main(void)
{
init_devices();
while(1)
{
}
}
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