uart.zip

#include "s3c24xx.h" #include "uart.h" void uart_init(){ GPHCON &= ~((3<<4) | (3<<6)); /*设置引脚为UART0*/ GPHCON |= ((2<<4) | (2<<6)); GPHUP &= ~((1<<2) | (1<<3)); UCON0 = 0x00000005; //时钟选择 UBRDIV0 = 26; //UBRDIVn = uart clock /波特率*16 -1 = 50M/115200*16 -1 = 26 ULCON0 = 0x00000003; //8,n,1 } int putchar(int c){ while(!(UTRSTAT0 & (1<<2))); UTXH0 = (unsigned char)c; } int getchar(void){ while(!(UTRSTAT0 & (1<<0))); return URXH0; } int puts(const char *s) { while(*s) { putchar(*s); s++; } }