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/****************************************************************************
* configs/16z/z16f_leds.c
*
* Copyright (C) 2014 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 NuttX 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.
*
****************************************************************************/
/* LEDs
*
* The 16z board has 7 LEDs, five of which are controllable via software:
*
* ----- ------ ------ ------------------------------------
* LED Color Signal Description
* ----- ------ ------ ------------------------------------
* LED1 Red 3V3 Indicates the presence of +3.3V
* LED2 Red 5V Indicates the presence of +5V
* LED3 Blue ~RF Controlled via PH2. Notes: 1, 2
* LED4 Green ~SXM Controlled via PH3. Notes: 1, 3
* LED5 Green ~SD1 Controlled via PJ0. Notes: 1, 4
* LED6 Yellow ~SD2 Controlled via PJ4. Notes: 1, 5
* LED7 Yellow ~SD0 Controlled via PJ7. Notes: 1, 6
* ----- ------ ------ ------------------------------------
*
* Note 1: Pulled high so a low output illuminates the LED.
* Note 2: PH2/~RF is also used by the RF transceiver, X2. That part is not
* populated on my board.
* Note 3: ~SXM is the chip select for the serial memory, U4. That part is
* not populated on my board.
* Note 4: ~SD1 is the chip select for the SD card 1, X11.
* Note 5: ~SD2 is the chip select for the SD card 2, X10.
* Note 6: ~SD0 is the chip select for the microSD 0, X12.
*
* In conclusion: None of the LEDs are available to indicate software status
* without potentially sacrificing board functionality. If the RF transceiver
* is not installed (CONFIG_16Z_RFTRANSCEIVER=n) and if LED support is
* requested (CONFIG_ARCH_LEDS), then LED3 will be used to indicate status: A
* solid color means that the board has boot successfully; flashing at a rate
* of approximately 2Hz indicates a software failure.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <arch/board/board.h>
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_led_initialize
****************************************************************************/
#ifdef CONFIG_ARCH_LEDS
void board_led_initialize(void)
{
/* All GPIO initialization is done in up_lowinit() */
}
/****************************************************************************
* Name: board_led_on
****************************************************************************/
void board_led_on(int led)
{
#if defined(HAVE_16Z_LED3) || defined(HAVE_16Z_LED4)
/* The following operations must be atomic */
irqstate_t flags = irqsave();
uint8_t regval = getreg8(Z16F_GPIOH_OUT);
#ifdef HAVE_16Z_LED3
/* LED3 is available at PH2 and illuminated by a low output */
if ((led & __LED3_BIT) != 0)
{
regval &= ~(1 << 2);
}
#endif
#ifdef HAVE_16Z_LED4
/* LED4 is available at PH3 and illuminated by a low output */
if ((led & __LED4_BIT) != 0)
{
regval &= ~(1 << 3);
}
#endif
putreg8(regval, Z16F_GPIOH_OUT);
irqrestore(flags);
#endif
}
/****************************************************************************
* Name: board_led_off
****************************************************************************/
void board_led_off(int led)
{
#if defined(HAVE_16Z_LED3) || defined(HAVE_16Z_LED4)
/* The following operations must be atomic */
irqstate_t flags = irqsave();
uint8_t regval = getreg8(Z16F_GPIOH_OUT);
#ifdef HAVE_16Z_LED3
/* LED3 is available at PH2 and illuminated by a low output */
if ((led & __LED3_BIT) != 0)
{
regval |= (1 << 2);
}
#endif
#ifdef HAVE_16Z_LED4
/* LED4 is available at PH3 and illuminated by a low output */
if ((led & __LED4_BIT) != 0)
{
regval |= (1 << 3);
}
#endif
putreg8(regval, Z16F_GPIOH_OUT);
irqrestore(flags);
#endif
}
#endif /* CONFIG_ARCH_LEDS */
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