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/************************************************************
* up_putc.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <nuttx/arch.h>
#include <8052.h>
#include "up_internal.h"
/************************************************************
* Definitions
************************************************************/
#define up_extint0 ((vector_t)PM2_VECTOR_EXTINT0)
#define up_timer0 ((vector_t)PM2_VECTOR_TIMER0)
#define up_extint1 ((vector_t)PM2_VECTOR_EXTINT1)
#define up_timer1 ((vector_t)PM2_VECTOR_TIMER1)
#define up_uart ((vector_t)PM2_VECTOR_UART)
#define up_timer2 ((vector_t)PM2_VECTOR_TIMER2)
/************************************************************
* Private Types
************************************************************/
typedef void (*vector_t)(void);
/************************************************************
* Public Variables
************************************************************/
boolean g_irqtest;
ubyte g_irqtos;
ubyte g_irqregs[REGS_SIZE];
int g_nirqs;
FAR struct xcptcontext *g_irqcontext;
/************************************************************
* Private Functions
************************************************************/
/************************************************************
* Name: utility functions
************************************************************/
static void _up_putc(ubyte ch) __naked
{
ch; /* To avoid unreferenced argument warning */
_asm
mov a, dpl
ljmp PM2_ENTRY_COUT
_endasm;
}
void _up_puthex(ubyte hex) __naked
{
hex; /* To avoid unreferenced argument warning */
_asm
mov a, dpl
ljmp PM2_ENTRY_PHEX
_endasm;
}
void _up_puthex16(int hex) __naked
{
hex; /* To avoid unreferenced argument warning */
_asm
ljmp PM2_ENTRY_PHEX16
_endasm;
}
void _up_putnl(void) __naked
{
_asm
ljmp PM2_ENTRY_NEWLINE
_endasm;
}
void _up_puts(__code char *ptr)
{
for (; *ptr; ptr++)
{
_up_putc(*ptr);
}
}
void _up_delay(ubyte milliseconds) __naked
{
_asm
mov r0, dpl
00001$: mov r1, #230
00002$: nop
nop
nop
nop
nop
nop
djnz r1, 00002$
djnz r0, 00001$
ret
_endasm;
}
/************************************************************
* Public Functions
************************************************************/
/************************************************************
* Name: os_start
*
* Description:
* "Fake" OS entry point.
*
************************************************************/
void os_start(void)
{
int i;
/* Disable all interrupts */
IE = 0;
/* Then verify all of the interrupt */
g_irqtest = FALSE;
up_extint0();
up_timer0();
#ifndef CONFIG_8052_TIMER2
up_timer0();
#endif
up_extint1();
up_timer1();
up_uart();
up_timer2();
/* Now a real interrupt ... */
/* Configure timer 0 */
TR0 = 0; /* Make sure timer 0 is stopped */
TF0 = 0; /* Clear the overflow flag */
TMOD &= 0xF0; /* Set to mode 0 (without changing timer1) */
TL0 = 0; /* Clear timer 0 value */
TH0 = 0;
TR0 = 1; /* Start the timer */
/* Start timer interrupts */
g_irqtest = TRUE;
g_nirqs = 0;
IE = 0x82; /* Enable interrupts */
/* Wait a about 500 MS */
_up_delay(500);
/* Disable the timer */
TR0 = 0; /* Stop timer 0 */
IE = 0; /* Disable interrupts */
_up_puts("IRQs in 500 MS=");
_up_puthex16(g_nirqs);
_up_putnl();
/* end of test */
_up_puts("Test complete");
_up_putnl();
for(;;);
}
/************************************************************
* Name: irq_dispatch
*
* Description:
* "Fake" IRQ dispatcher
*
***********************************************************/
void irq_dispatch(int irq, FAR void *context)
{
context;
if (g_irqtest)
{
g_nirqs++;
}
else
{
_up_puts("Dispatch IRQ=");
_up_puthex(irq);
_up_putnl();
}
}
/************************************************************
* Name: up_dumpstack / up_dumpframe
*
* Description:
* "Fake" debug routines if needed.
*
************************************************************/
void up_dumpstack(void)
{
}
void up_dumpframe(FAR struct xcptcontext *context)
{
}
/************************************************************
* Name: up_ledinit, up_ledon, up_ledoff
*
* Description:
* "Fake" LED routines if needed
*
************************************************************/
void up_ledinit(void)
{
}
void up_ledon(ubyte led)
{
led;
}
void up_ledoff(ubyte led)
{
led;
}
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