| Index: emcore/trunk/target/ipodnano3g/uart.c |
| — | — | @@ -0,0 +1,86 @@ |
| | 2 | +//
|
| | 3 | +//
|
| | 4 | +// Copyright 2011 TheSeven
|
| | 5 | +//
|
| | 6 | +//
|
| | 7 | +// This file is part of emCORE.
|
| | 8 | +//
|
| | 9 | +// emCORE is free software: you can redistribute it and/or
|
| | 10 | +// modify it under the terms of the GNU General Public License as
|
| | 11 | +// published by the Free Software Foundation, either version 2 of the
|
| | 12 | +// License, or (at your option) any later version.
|
| | 13 | +//
|
| | 14 | +// emCORE is distributed in the hope that it will be useful,
|
| | 15 | +// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| | 16 | +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
| | 17 | +// See the GNU General Public License for more details.
|
| | 18 | +//
|
| | 19 | +// You should have received a copy of the GNU General Public License along
|
| | 20 | +// with emCORE. If not, see <http://www.gnu.org/licenses/>.
|
| | 21 | +//
|
| | 22 | +//
|
| | 23 | +
|
| | 24 | +
|
| | 25 | +#include "global.h"
|
| | 26 | +#include "uart.h"
|
| | 27 | +#include "s5l8702.h"
|
| | 28 | +#include "timer.h"
|
| | 29 | +
|
| | 30 | +
|
| | 31 | +void uart_init()
|
| | 32 | +{
|
| | 33 | + clockgate_enable(41, true);
|
| | 34 | + ULCON = 3;
|
| | 35 | + UCON = 0x405;
|
| | 36 | + UFCON = 7;
|
| | 37 | + UMCON = 0;
|
| | 38 | + uart_set_baud(250000);
|
| | 39 | +}
|
| | 40 | +
|
| | 41 | +void uart_set_baud(int baud)
|
| | 42 | +{
|
| | 43 | + UBRDIV = (750000 / baud) - 1;
|
| | 44 | +}
|
| | 45 | +
|
| | 46 | +void uart_putc(char byte)
|
| | 47 | +{
|
| | 48 | + while (UFSTAT & BIT(9)) sleep(100);
|
| | 49 | + UTXH = byte;
|
| | 50 | +}
|
| | 51 | +
|
| | 52 | +void uart_puts(const char* string)
|
| | 53 | +{
|
| | 54 | + char byte;
|
| | 55 | + while (byte = *string++) uart_putc(byte);
|
| | 56 | +}
|
| | 57 | +
|
| | 58 | +void uart_write(const char* string, size_t length)
|
| | 59 | +{
|
| | 60 | + while (length--) uart_putc(*string++);
|
| | 61 | +}
|
| | 62 | +
|
| | 63 | +int uart_getc(int timeout)
|
| | 64 | +{
|
| | 65 | + int byte = -1;
|
| | 66 | + long starttime = USEC_TIMER;
|
| | 67 | + while (!(UFSTAT & BITRANGE(0, 3)) && !TIMEOUT_EXPIRED(starttime, timeout)) sleep(100);
|
| | 68 | + if (UFSTAT & BITRANGE(0, 3)) byte = URXH;
|
| | 69 | + return byte;
|
| | 70 | +}
|
| | 71 | +
|
| | 72 | +int uart_read(char* string, size_t length, int timeout)
|
| | 73 | +{
|
| | 74 | + int count = 0;
|
| | 75 | + long starttime = USEC_TIMER;
|
| | 76 | + while (length && !TIMEOUT_EXPIRED(starttime, timeout))
|
| | 77 | + {
|
| | 78 | + if (UFSTAT & BITRANGE(0, 3))
|
| | 79 | + {
|
| | 80 | + *string++ = URXH;
|
| | 81 | + length--;
|
| | 82 | + count++;
|
| | 83 | + }
|
| | 84 | + else sleep(100);
|
| | 85 | + }
|
| | 86 | + return count;
|
| | 87 | +}
|
| Index: emcore/trunk/uart.h |
| — | — | @@ -0,0 +1,40 @@ |
| | 2 | +//
|
| | 3 | +//
|
| | 4 | +// Copyright 2011 TheSeven
|
| | 5 | +//
|
| | 6 | +//
|
| | 7 | +// This file is part of emCORE.
|
| | 8 | +//
|
| | 9 | +// emCORE is free software: you can redistribute it and/or
|
| | 10 | +// modify it under the terms of the GNU General Public License as
|
| | 11 | +// published by the Free Software Foundation, either version 2 of the
|
| | 12 | +// License, or (at your option) any later version.
|
| | 13 | +//
|
| | 14 | +// emCORE is distributed in the hope that it will be useful,
|
| | 15 | +// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| | 16 | +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
| | 17 | +// See the GNU General Public License for more details.
|
| | 18 | +//
|
| | 19 | +// You should have received a copy of the GNU General Public License along
|
| | 20 | +// with emCORE. If not, see <http://www.gnu.org/licenses/>.
|
| | 21 | +//
|
| | 22 | +//
|
| | 23 | +
|
| | 24 | +
|
| | 25 | +#ifndef __UART_H__
|
| | 26 | +#define __UART_H__
|
| | 27 | +
|
| | 28 | +
|
| | 29 | +#include "global.h"
|
| | 30 | +
|
| | 31 | +
|
| | 32 | +void uart_init() INITCODE_ATTR;
|
| | 33 | +void uart_set_baud(int baud);
|
| | 34 | +void uart_putc(char string) ICODE_ATTR;
|
| | 35 | +void uart_puts(const char* string) ICODE_ATTR;
|
| | 36 | +void uart_write(const char* string, size_t length) ICODE_ATTR;
|
| | 37 | +int uart_getc(int timeout) ICODE_ATTR;
|
| | 38 | +int uart_read(char* string, size_t length, int timeout) ICODE_ATTR;
|
| | 39 | +
|
| | 40 | +
|
| | 41 | +#endif
|
