lcd.tar.gz_嵌入式 LCD

#include "regs.h" #include <stdarg.h> void uart_init(void) { GPACON &= ~0xff; GPACON |= 0x22; ULCON0 = 0x3; UCON0 = (1 << 2)|(1 << 0); UFCON0 = 0; UMCON0 = 0; UBRDIV0 = 34; UDIVSLOT0 = 0xdfdd; } void uart_putchar(char c) { UTXH0 = c; while(!(UTRSTAT0 & (1 << 2))); } char uart_getchar(void) { while(!(UTRSTAT0 & (1 << 0))); return URXH0; } void uart_put(char *s) //"hello\n" { while(*s != '\0'){ uart_putchar(*s); if(*s == '\n'){ uart_putchar('\r'); } s++; } } void uart_puts(char *s) //"hello" { uart_put(s); uart_putchar('\n'); uart_putchar('\r'); } char recv_buffer[1024]; char *uart_gets(void) { int i = 0; char c; do{ c = uart_getchar(); uart_putchar(c); if(c == '\r'){ uart_putchar('\n'); } recv_buffer[i] = c; i++; }while((c != '\r') && (c != '\n')); recv_buffer[i - 1] = '\0'; return recv_buffer; } char tmp_buffer[16]; char *itoa(unsigned int num)// 10 "10" { int i = 0; if(num < 10){ tmp_buffer[0] = num + '0'; tmp_buffer[1] = '\0'; } else { itoa(num / 10); while(tmp_buffer[i] != '\0') i++; tmp_buffer[i] = num % 10 + '0'; tmp_buffer[i + 1] = '\0'; } return tmp_buffer; } char *xtoa(unsigned int num)// 10 "A" { int i = 0; if(num < 10){ tmp_buffer[0] = num + '0'; tmp_buffer[1] = '\0'; } else if((num >= 10) && (num < 16)){ tmp_buffer[0] = num - 10 + 'A'; tmp_buffer[1] = '\0'; } else { xtoa(num / 16); while(tmp_buffer[i] != '\0') i++; if(num %16 < 10){ tmp_buffer[i] = num % 16 +'0'; tmp_buffer[i + 1] = '\0'; } else { tmp_buffer[i] = num % 16 - 10 + 'A'; tmp_buffer[i + 1] = '\0'; } } return tmp_buffer; } void uart_printf(char *fmt,...)//%c %d %x %s { va_list ap; int i = 0; va_start(ap,fmt); while(fmt[i] != '\0'){ if(fmt[i] != '%'){ uart_putchar(fmt[i]); if(fmt[i] == '\n'){ uart_putchar('\r'); } i++; } else { switch(fmt[i + 1]){ case 'd': uart_put(itoa(va_arg(ap,int))); break; case 'x': uart_put("0x"); uart_put(xtoa(va_arg(ap,int))); break; case 's': uart_put(va_arg(ap,char*)); break; case 'c': uart_putchar(va_arg(ap,int)); break; default: uart_putchar(va_arg(ap,int)); break; } i += 2; } } va_end(ap); }