uart.c

来自「Philips 900系列单片机键盘中断源程序」· C语言 代码 · 共 30 行

#include <reg932.h>
char ascii[] = "0123456789ABCDEF";
void UART_Init(void)
{
    P1M1 &= 0xFC; /* TXD (P1.0) -> quasi bidir */
    // BRG -> BRGR1,BRGR0 = (OSC / baudrate) - 16
    // BRG -> BRGR1,BRGR0 = (7.373Mhz / 19200) - 16 = 0x170
    BRGR1 = 0x01;
    BRGR0 = 0x70;
    BRGCON = 3;
    AUXR1 |= 0x40; /* enable break detect reset */
    SCON = 0x52; /* mode 1, receiver enable */
}
void ua_outchar(char c)
{
    while (!TI) ;
    SBUF = c;
    TI = 0;
}
void PrintString(char *s)
{
    while (*s)
    {
        if (*s == '\n')
        ua_outchar('\r');
        ua_outchar(*s);
        s++;
    }
}