mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-01 14:14:38 +02:00
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
//
|
|
// Authors: Wolfgang Spraul <wolfgang@sharism.cc>
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License
|
|
// as published by the Free Software Foundation; either version
|
|
// 3 of the License, or (at your option) any later version.
|
|
//
|
|
|
|
#include "serial.h"
|
|
#include "jz4740.h"
|
|
|
|
void serial_putc(char c)
|
|
{
|
|
volatile u8* uart_lsr = (volatile u8*)(UART_BASE + OFF_LSR);
|
|
volatile u8* uart_tdr = (volatile u8*)(UART_BASE + OFF_TDR);
|
|
|
|
if (c == '\n') serial_putc ('\r');
|
|
|
|
/* Wait for fifo to shift out some bytes */
|
|
while ( !((*uart_lsr & (UART_LSR_TDRQ | UART_LSR_TEMT)) == 0x60) );
|
|
|
|
*uart_tdr = (u8) c;
|
|
}
|
|
|
|
void serial_puts(const char *s)
|
|
{
|
|
while (*s) serial_putc(*s++);
|
|
}
|
|
|
|
void serial_put_hex(unsigned int v)
|
|
{
|
|
unsigned char c[12];
|
|
char i;
|
|
for(i = 0; i < 8;i++)
|
|
{
|
|
c[i] = (v >> ((7 - i) * 4)) & 0xf;
|
|
if(c[i] < 10)
|
|
c[i] += 0x30;
|
|
else
|
|
c[i] += (0x41 - 10);
|
|
}
|
|
c[8] = '\n';
|
|
c[9] = 0;
|
|
serial_puts(c);
|
|
}
|
|
|
|
int serial_getc()
|
|
{
|
|
volatile u8* uart_rdr = (volatile u8*)(UART_BASE + OFF_RDR);
|
|
while (!serial_tstc());
|
|
return *uart_rdr;
|
|
}
|
|
|
|
int serial_tstc()
|
|
{
|
|
volatile u8* uart_lsr = (volatile u8*)(UART_BASE + OFF_LSR);
|
|
if (*uart_lsr & UART_LSR_DR) {
|
|
/* Data in rfifo */
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|