/*------------------------------------------------------------------------
main -
|------------------------------------------------------------------------*/
void main(void)
{
PCON = 0x80; /* power control byte, set SMOD bit for serial port */
SCON = 0x50; /* serial control byte, mode 1, RI active */
TMOD = 0x21; /* timer control mode, byte operation */
TCON = 0; /* timer control register, byte operation */
TH1 = 0xFA; /* serial reload value, 9,600 baud at 11.0952Mhz */
TR1 = 1; /* start serial timer */
EA = 1; /* Enable Interrupts */
TI = 0; /* clear this out */
SBUF = '.'; /* send an initial '.' out serial port */
//ES = 1; /* Enable serial interrupts IE.4 */
tx_str("Hello World\n");
RI = 0;
g_dc = 0;
for (;;)
{
if (RI) // we have new serial rx data
{
g_dc = SBUF; // read the serial char
RI = 0; // reset serial rx flag
tx_char(g_dc); // echo back out as serial tx data
if ((g_dc == 0x0d) || (g_dc == '.') || (g_dc == 0x0a)) // if CR, then end of line
{
tx_char(0xd); // CR
tx_char(0xa); // LF
lbuf[li] = 0;
li = 0;
tx_str("You typed in this[");
tx_str(lbuf);
tx_str("]\n");
}
else
{
lbuf[li] = g_dc;
if (li < 11)
++li;
}
}
}
}
static void tx_hex(char *str, unsigned int num) {
const char c[] = "0123456789abcdef";
int s = 28;
tx_str(str);
while(s >= 0) {
tx(c[(num >> s)&0x0f]);
s -= 4;
}
tx('\n');
tx('\r');
}
