?? serial.c
字號:
#include <stdint.h>#include <stdlib.h>#include <string.h>#include <avr/interrupt.h>#include <avr/io.h>#include <avr/pgmspace.h>#include <avr/wdt.h>volatile char rxbuff;volatile uint8_t rx_count = 0;#define TX_BUF_LEN 100volatile char tx_buf[TX_BUF_LEN];volatile uint8_t tx_buf_size = 0;volatile uint8_t tx_buf_tail = 0;ISR(USART_RX_vect) { uint8_t c; c = UDR0; if(bit_is_clear(UCSR0A, FE0)) { rxbuff = c; rx_count++; }}ISR(USART_UDRE_vect) { if(tx_buf_size) { if(tx_buf_tail - tx_buf_size < 0) { UDR0 = tx_buf[tx_buf_tail - tx_buf_size + TX_BUF_LEN]; } else { UDR0 = tx_buf[tx_buf_tail - tx_buf_size]; } tx_buf_size--; } else { UCSR0B &= ~_BV(UDRIE0); }}void init_serial() { UCSR0A = _BV(U2X0); UCSR0B = _BV(TXEN0) | _BV(RXEN0) | _BV(RXCIE0); UBRR0L = 16; // 115.2k for 16MHz clock //UBRR0L = 0; // 2M baud for 16MHz clock}void putchr(char c) { if(c == '\n') putchr('\r'); while(tx_buf_size == TX_BUF_LEN) { //sleep_mode(); wdt_reset(); } UCSR0B &= ~_BV(UDRIE0); tx_buf[tx_buf_tail++] = c; if(tx_buf_tail == TX_BUF_LEN) tx_buf_tail = 0; tx_buf_size++; UCSR0B |= _BV(UDRIE0);}uint8_t chr_avail() { return rx_count;}char getchr() { while(!rx_count) wdt_reset(); char c = rxbuff; rx_count = 0; return c;}void printstr(const char *s) { while(*s) putchr(*s++);}void printstr_p(const char *s) { char c; while((c = pgm_read_byte(s++))) putchr(c);}void zeropad(char *s, int target_len) { int len = strlen(s); int diff = target_len - len; if(diff <= 0) return; int i; for(i=len; i>=0; i--) s[i+diff] = s[i]; while(diff) s[--diff] = '0';}void print_uint16(uint16_t val) { char s[6]; ltoa(val, s, 10); printstr(s);}void print_uint32(uint32_t val) { char s[11]; ltoa(val, s, 10); printstr(s);}?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -