/Designs/Tools/Oscilloscope/SW/firmware/libs/usart.c
0,0 → 1,128
#include "usart.h"
 
#include <avr/io.h>
 
 
void USART_Init( unsigned int ubrr)
{
/* Set baud rate */
UBRRH = (unsigned char)(ubrr>>8);
UBRRL = (unsigned char)ubrr;
 
/* flush transmitt register Double speed */
UCSRA = (1<<UDRE)|(1 << U2X);
 
/* enable receiver interrupt and transmitter, pins forced */
UCSRB = (1<<RXCIE)|(1<<RXEN)|(1<<TXEN);
 
/* Asynchronous, no parity, Set frame format: 8data, 1stop bit */
UCSRC = (1<<URSEL)|(1<<UCSZ0)|(1<<UCSZ1);
}
 
 
void USART_Transmit( unsigned char data )
{
while ( !( UCSRA & (1<<UDRE)) ); /* Wait for empty transmit buffer */
 
UDR = data; /* Put data into buffer, sends the data */
}
 
 
void USART_Transmit_string( char *data )
{
while ( *data != 0 ) {
USART_Transmit(*data);
data++;
}
}
 
 
void USART_Transmit_longnum(signed long data ) {
unsigned char digits[10],i;
 
if (data==0)
USART_Transmit('0');
else { // PROZKOUMAT!
 
if (data<0) {
USART_Transmit('-');
data*=-1;
}
 
for (i=0;i<10;i++) {
digits[i]=data%10;
data=data/10;
}
 
i=9;
while (digits[i]==0) i--;
while (i>0) {
USART_Transmit(digits[i]+48);
i--;
}
USART_Transmit(digits[0]+48);
 
}
}
 
 
void USART_Transmit_uint16 (unsigned int data ) {
unsigned char digits[5],i;
 
if (data==0) //podivne, ale nulu to odeslat neumi
USART_Transmit('0');
else {
 
for (i=0;i<5;i++) {
digits[i]=data%10;
data=data/10;
}
 
i=4;
while (digits[i]==0) i--;
while (i>0) {
USART_Transmit(digits[i]+48);
i--;
}
USART_Transmit(digits[0]+48);
 
}
}
 
 
void USART_Transmit_num(unsigned char data ) {
unsigned char a,b,c;
 
c=data%10;
data=data/10;
b=data%10;
data=data/10;
a=data%10;
 
USART_Transmit(a+48);
USART_Transmit(b+48);
USART_Transmit(c+48);
}
 
 
/*void USART_Transmit_float( float data ) {
int a,b,c;
 
c=((int)data)%10;
b=((int)(data/10))%10;
a=((int)(data/100))%10;
 
USART_Transmit(a+48);
USART_Transmit(b+48);
USART_Transmit(c+48);
}*/
 
 
void USART_Transmit_byte( char data ) {
unsigned char i;
i=0b10000000;
while (i) {
USART_Transmit( ( (i&data)&&1 ) + 48 );
i>>=1;
}
}