uart.zip_UART driver ARM_linux uart

#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 mputchar(char c) { while(!(UTRSTAT0&0x2)){ ; } UTXH0 = c; if(c == '\n'){ mputchar('\r'); } } int mgetchar(void) { int c; while(!(UTRSTAT0&0x1)){ ; } c = URXH0; if(c == '\r'){ c = '\n'; } mputchar(c); return c; } void mputs(char *str) { while(*str){ mputchar(*str++); } } char *mgets(char *dst) { char *tmp = dst; while((*dst++ = mgetchar()) != '\n'){ continue; } *(--dst) = '\0'; return tmp; } int mprintf(const char *fmt, ...) { va_list ap; va_start(ap, fmt); while(*fmt != '\0'){ if(*fmt == '%'){ fmt++; }else{ mputchar(*fmt); } fmt++; } return 0; }