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/* -*- c -*- */
/*
* Copyright 2007,2008 Free Software Foundation, Inc.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// conditionalized on HAL_IO_USES_DBOARD_PINS && HAL_IO_USES_UART
#include "hal_io.h"
#include "memory_map.h"
#include "hal_uart.h"
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
/*
* ========================================================================
* leds
* ========================================================================
*/
static unsigned long leds_shadow = 0;
static unsigned long led_src_shadow = 0;
void
hal_set_leds(int value, int mask)
{
int ei = hal_disable_ints();
leds_shadow = (leds_shadow & ~mask) | (value & mask);
output_regs->leds = leds_shadow;
hal_restore_ints(ei);
}
// Allow hardware control over leds. 1 = hardware, 0 = software
void
hal_set_led_src(int value, int mask)
{
int ei = hal_disable_ints();
led_src_shadow = (led_src_shadow & ~mask) | (value & mask);
output_regs->led_src = led_src_shadow;
hal_restore_ints(ei);
}
void
hal_toggle_leds(int mask)
{
int ei = hal_disable_ints();
leds_shadow ^= mask;
output_regs->leds = leds_shadow;
hal_restore_ints(ei);
}
// ================================================================
// primitives
// ================================================================
#if defined(HAL_IO_USES_DBOARD_PINS)
//
// Does i/o using high 9-bits of rx daughterboard pins.
//
// 1 1 1 1 1 1
// 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | char |W| |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
//
// Asserts W when writing char
//
#define W 0x0080
void
hal_io_init(void)
{
// make high 9 bits of tx daughterboard outputs
hal_gpio_set_rx_mode(15, 7, GPIOM_OUTPUT);
// and set them to zero
hal_gpio_set_rx(0x0000, 0xff80);
}
void
hal_finish(void)
{
volatile unsigned long *p = (unsigned long *) 0xC2F0;
*p = 0;
}
// %c
inline int
putchar(int ch)
{
hal_gpio_set_rx((s << 8) | W, 0xff80);
hal_gpio_set_rx(0, 0xff80);
return ch;
}
#elif defined(HAL_IO_USES_UART)
void
hal_io_init(void)
{
hal_uart_init();
}
void
hal_finish(void)
{
}
// %c
inline int
putchar(int ch)
{
hal_uart_putc(ch);
return ch;
}
int
getchar(void)
{
return hal_uart_getc();
}
#else // nop all i/o
void
hal_io_init(void)
{
}
void
hal_finish(void)
{
}
// %c
inline int
putchar(int ch)
{
return ch;
}
int
getchar(void)
{
return EOF;
}
#endif
// ================================================================
// (slightly) higher level functions
//
// These are here so we can inline the calls to putchar.
// The rest of the stuff was moved to nonstdio.c
// ================================================================
// \n
inline void
newline(void)
{
putchar('\n');
}
int
putstr(const char *s)
{
while (*s)
putchar(*s++);
return 0;
}
int
puts(const char *s)
{
putstr(s);
putchar('\n');
return 0;
}
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