Rev 2116 Rev 2222
1 #include "usart.h" 1 #include "usart.h"
2   2  
3 #include <avr/io.h> 3 #include <avr/io.h>
4   4  
5   5  
6 void USART_Init( unsigned int ubrr) 6 void USART_Init( unsigned int ubrr)
7 { 7 {
8 /* Set baud rate */ 8 /* Set baud rate */
9 UBRRH = (unsigned char)(ubrr>>8); 9 UBRRH = (unsigned char)(ubrr>>8);
10 UBRRL = (unsigned char)ubrr; 10 UBRRL = (unsigned char)ubrr;
11   11  
12 /* flush transmitt register Double speed */ 12 /* flush transmitt register Double speed */
13 UCSRA = (1<<UDRE)|(1 << U2X); 13 UCSRA = (1<<UDRE)|(1 << U2X);
14   14  
15 /* enable receiver interrupt and transmitter, pins forced */ 15 /* enable receiver interrupt and transmitter, pins forced */
16 UCSRB = (1<<RXCIE)|(1<<RXEN)|(1<<TXEN); 16 UCSRB = (1<<RXCIE)|(1<<RXEN)|(1<<TXEN);
17   17  
18 /* Asynchronous, no parity, Set frame format: 8data, 1stop bit */ 18 /* Asynchronous, no parity, Set frame format: 8data, 1stop bit */
19 UCSRC = (1<<URSEL)|(1<<UCSZ0)|(1<<UCSZ1); 19 UCSRC = (1<<URSEL)|(1<<UCSZ0)|(1<<UCSZ1);
20 } 20 }
21   21  
22   22  
23 void USART_Transmit( unsigned char data ) 23 void USART_Transmit( unsigned char data )
24 { 24 {
25 while ( !( UCSRA & (1<<UDRE)) ); /* Wait for empty transmit buffer */ 25 while ( !( UCSRA & (1<<UDRE)) ); /* Wait for empty transmit buffer */
26   26  
27 UDR = data; /* Put data into buffer, sends the data */ 27 UDR = data; /* Put data into buffer, sends the data */
28 } 28 }
29   29  
30   30  
31 void USART_Transmit_string( char *data ) 31 void USART_Transmit_string( char *data )
32 { 32 {
33 while ( *data != 0 ) { 33 while ( *data != 0 ) {
34 USART_Transmit(*data); 34 USART_Transmit(*data);
35 data++; 35 data++;
36 } 36 }
37 } 37 }
38   38  
39   39  
40 void USART_Transmit_longnum(signed long data ) { 40 void USART_Transmit_longnum(signed long data ) {
41 unsigned char digits[10],i; 41 unsigned char digits[10],i;
42   42  
43 if (data==0) 43 if (data==0)
44 USART_Transmit('0'); 44 USART_Transmit('0');
45 else { // PROZKOUMAT! 45 else { // PROZKOUMAT!
46   46  
47 if (data<0) { 47 if (data<0) {
48 USART_Transmit('-'); 48 USART_Transmit('-');
49 data*=-1; 49 data*=-1;
50 } 50 }
51   51  
52 for (i=0;i<10;i++) { 52 for (i=0;i<10;i++) {
53 digits[i]=data%10; 53 digits[i]=data%10;
54 data=data/10; 54 data=data/10;
55 } 55 }
56   56  
57 i=9; 57 i=9;
58 while (digits[i]==0) i--; 58 while (digits[i]==0) i--;
59 while (i>0) { 59 while (i>0) {
60 USART_Transmit(digits[i]+48); 60 USART_Transmit(digits[i]+48);
61 i--; 61 i--;
62 } 62 }
63 USART_Transmit(digits[0]+48); 63 USART_Transmit(digits[0]+48);
64   64  
65 } 65 }
66 } 66 }
67   67  
68   68  
69 void USART_Transmit_num(unsigned char data ) { 69 void USART_Transmit_num(unsigned char data ) {
70 unsigned char a,b,c; 70 unsigned char a,b,c;
71   71  
72 c=data%10; 72 c=data%10;
73 data=data/10; 73 data=data/10;
74 b=data%10; 74 b=data%10;
75 data=data/10; 75 data=data/10;
76 a=data%10; 76 a=data%10;
77   77  
78 USART_Transmit(a+48); 78 USART_Transmit(a+48);
79 USART_Transmit(b+48); 79 USART_Transmit(b+48);
80 USART_Transmit(c+48); 80 USART_Transmit(c+48);
81 } 81 }
82   82  
83   83  
84 /*void USART_Transmit_float( float data ) { 84 /*void USART_Transmit_float( float data ) {
85 int a,b,c; 85 int a,b,c;
86   86  
87 c=((int)data)%10; 87 c=((int)data)%10;
88 b=((int)(data/10))%10; 88 b=((int)(data/10))%10;
89 a=((int)(data/100))%10; 89 a=((int)(data/100))%10;
90   90  
91 USART_Transmit(a+48); 91 USART_Transmit(a+48);
92 USART_Transmit(b+48); 92 USART_Transmit(b+48);
93 USART_Transmit(c+48); 93 USART_Transmit(c+48);
94 }*/ 94 }*/
95   95  
96   96  
97 void USART_Transmit_byte( char data ) { 97 void USART_Transmit_byte( char data ) {
98 unsigned char i; 98 unsigned char i;
99 i=0b10000000; 99 i=0b10000000;
100 while (i) { 100 while (i) {
101 USART_Transmit( ( (i&data)&&1 ) + 48 ); 101 USART_Transmit( ( (i&data)&&1 ) + 48 );
102 i>>=1; 102 i>>=1;
103 } 103 }
104 } 104 }