/************************************************************************************
* configs/scp16c26/src/up_leds.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <stdint.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "up_internal.h"
#include "chip.h"
#ifdef CONFIG_ARCH_LEDS
/************************************************************************************
* Preprocessor Definitions
************************************************************************************/
/* The SKP62C26 has 3 LEDs control by bits 0 and 2 in port 7 and bit 0 in port 8. */
#define GREEN_LED (1 << 2) /* Bit 2, port 7 */
#define YELLOW_LED (1 << 4) /* Bit 4, port 7 */
#define RED_LED (1 << 0) /* Bit 0, port 8 */
#define GREEN_LED_ON 0
#define GREEN_LED_OFF GREEN_LED
#define GREEN_LED_MASK GREEN_LED
#define GREEN_LED_PORT M16C_P7
#define YELLOW_LED_ON 0
#define YELLOW_LED_OFF YELLOW_LED
#define YELLOW_LED_MASK YELLOW_LED
#define YELLOW_LED_PORT M16C_P7
#define GREENYELLOW_LED_MASK (GREEN_LED_MASK|YELLOW_LED_MASK)
#define GREENYELLOW_LED_PORT M16C_P7
#define GREENYELLOW_DIR_PORT M16C_PD7
#define RED_LED_ON 0
#define RED_LED_OFF RED_LED
#define RED_LED_MASK RED_LED
#define RED_LED_PORT M16C_P8
#define RED_DIR_PORT M16C_PD8
/************************************************************************************
* Private Type Definitions
************************************************************************************/
/************************************************************************************
* Private Data Definitions
************************************************************************************/
static const uint8_t g_ledstate[7] =
{
(GREEN_LED_OFF | YELLOW_LED_OFF | RED_LED_OFF), /* LED_STARTED */
(GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_OFF), /* LED_HEAPALLOCATE */
(GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_OFF), /* LED_IRQSENABLED */
(GREEN_LED_ON | YELLOW_LED_ON | RED_LED_OFF), /* LED_STACKCREATED */
(GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_ON ), /* LED_INIRQ */
(GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_ON ), /* LED_SIGNAL */
(GREEN_LED_ON | YELLOW_LED_ON | RED_LED_ON ) /* LED_ASSERTION */
};
static uint8_t g_prevled[3];
static uint8_t g_nestlevel;
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Name: up_ledinit
************************************************************************************/
static void up_setleds(uint8_t gybits, uint8_t rbit)
{
uint8_t regval;
regval = getreg8(GREENYELLOW_LED_PORT);
regval &= ~GREENYELLOW_LED_MASK;
regval |= gybits;
putreg8(regval, GREENYELLOW_LED_PORT);
regval = getreg8(RED_LED_PORT);
regval &= ~RED_LED_MASK;
regval |= rbit;
putreg8(regval, RED_LED_PORT);
}
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: up_ledinit
************************************************************************************/
void up_ledinit(void)
{
register uint8_t regval;
/* Make sure that the LEDs are in the OFF state */
regval = getreg8(GREENYELLOW_LED_PORT);
regval |= (GREEN_LED_OFF |YELLOW_LED_OFF);
putreg8(regval, GREENYELLOW_LED_PORT);
regval = getreg8(RED_LED_PORT);
regval |= RED_LED_OFF;
putreg8(regval, RED_LED_PORT);
/* Set the direction to output */
regval = getreg8(GREENYELLOW_DIR_PORT);
regval |= (GREEN_LED |YELLOW_LED);
putreg8(regval, GREENYELLOW_DIR_PORT);
regval = getreg8(RED_DIR_PORT);
regval |= RED_LED;
putreg8(regval, RED_DIR_PORT);
}
/************************************************************************************
* Name: up_ledon
************************************************************************************/
void up_ledon(int led)
{
uint8_t ledset;
/* If this is the ASSERTION led, preserve the Y&G bits from the last setting and
* set the RED LED on.
*/
if (led == LED_ASSERTION)
{
ledset = g_ledstate[g_prevled[g_nestlevel]];
up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_ON);
}
else if (led < LED_ASSERTION)
{
/* Otherwise, just show the LEDs corresponding to this state */
ledset = g_ledstate[led];
up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK);
/* If this was a nested states (INIRQ, SIGNAL, or ASSERTION) then
* stack up the previous value.
*/
if (led > LED_STACKCREATED)
{
g_nestlevel++;
}
g_prevled[g_nestlevel] = led;
}
}
/************************************************************************************
* Name: up_ledoff
************************************************************************************/
void up_ledoff(int led)
{
uint8_t ledset;
/* If this is the ASSERTION led then what we do depends on the previous state */
if (led == LED_ASSERTION)
{
/* If the previous state was one of the nested states (INIRQ, SIGNAL, or ASSERTION),
* then turn the green and yellow LEDs all off. That way we can distinguish
* that case from the simple cases.
*/
if (g_nestlevel > 0)
{
ledset = 0;
}
else
{
ledset = g_ledstate[g_prevled[0]];
}
up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_OFF);
}
else if (led > 0 && led < LED_ASSERTION)
{
/* If this was one of the nested states, then we want to back to the LED setting
* before entering that nested statel.
*/
if (g_nestlevel > 0)
{
g_nestlevel--;
led = g_prevled[g_nestlevel];
}
else if (led > LED_STACKCREATED)
{
/* This shouldn't happen */
led--;
}
ledset = g_ledstate[led];
up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK);
g_prevled[g_nestlevel]= led;
}
}
#endif /* CONFIG_ARCH_LEDS */
