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245 lines
8.1 KiB
245 lines
8.1 KiB
/************************************************************************************ |
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* configs/scp16c26/src/up_leds.c |
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* |
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* Copyright (C) 2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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************************************************************************************/ |
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/************************************************************************************ |
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* Included Files |
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************************************************************************************/ |
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#include <nuttx/config.h> |
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#include <stdint.h> |
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#include <arch/board/board.h> |
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#include "up_arch.h" |
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#include "up_internal.h" |
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#include "chip.h" |
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#ifdef CONFIG_ARCH_LEDS |
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/************************************************************************************ |
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* Preprocessor Definitions |
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************************************************************************************/ |
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/* The SKP62C26 has 3 LEDs control by bits 0 and 2 in port 7 and bit 0 in port 8. */ |
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#define GREEN_LED (1 << 2) /* Bit 2, port 7 */ |
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#define YELLOW_LED (1 << 4) /* Bit 4, port 7 */ |
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#define RED_LED (1 << 0) /* Bit 0, port 8 */ |
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#define GREEN_LED_ON 0 |
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#define GREEN_LED_OFF GREEN_LED |
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#define GREEN_LED_MASK GREEN_LED |
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#define GREEN_LED_PORT M16C_P7 |
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#define YELLOW_LED_ON 0 |
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#define YELLOW_LED_OFF YELLOW_LED |
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#define YELLOW_LED_MASK YELLOW_LED |
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#define YELLOW_LED_PORT M16C_P7 |
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#define GREENYELLOW_LED_MASK (GREEN_LED_MASK|YELLOW_LED_MASK) |
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#define GREENYELLOW_LED_PORT M16C_P7 |
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#define GREENYELLOW_DIR_PORT M16C_PD7 |
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#define RED_LED_ON 0 |
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#define RED_LED_OFF RED_LED |
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#define RED_LED_MASK RED_LED |
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#define RED_LED_PORT M16C_P8 |
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#define RED_DIR_PORT M16C_PD8 |
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/************************************************************************************ |
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* Private Type Definitions |
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************************************************************************************/ |
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/************************************************************************************ |
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* Private Data Definitions |
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************************************************************************************/ |
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static const uint8_t g_ledstate[7] = |
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{ |
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(GREEN_LED_OFF | YELLOW_LED_OFF | RED_LED_OFF), /* LED_STARTED */ |
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(GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_OFF), /* LED_HEAPALLOCATE */ |
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(GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_OFF), /* LED_IRQSENABLED */ |
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(GREEN_LED_ON | YELLOW_LED_ON | RED_LED_OFF), /* LED_STACKCREATED */ |
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(GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_ON ), /* LED_INIRQ */ |
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(GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_ON ), /* LED_SIGNAL */ |
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(GREEN_LED_ON | YELLOW_LED_ON | RED_LED_ON ) /* LED_ASSERTION */ |
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}; |
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static uint8_t g_prevled[3]; |
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static uint8_t g_nestlevel; |
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/************************************************************************************ |
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* Private Functions |
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************************************************************************************/ |
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/************************************************************************************ |
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* Name: up_ledinit |
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************************************************************************************/ |
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static void up_setleds(uint8_t gybits, uint8_t rbit) |
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{ |
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uint8_t regval; |
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regval = getreg8(GREENYELLOW_LED_PORT); |
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regval &= ~GREENYELLOW_LED_MASK; |
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regval |= gybits; |
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putreg8(regval, GREENYELLOW_LED_PORT); |
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regval = getreg8(RED_LED_PORT); |
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regval &= ~RED_LED_MASK; |
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regval |= rbit; |
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putreg8(regval, RED_LED_PORT); |
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} |
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/************************************************************************************ |
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* Public Functions |
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************************************************************************************/ |
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/************************************************************************************ |
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* Name: up_ledinit |
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************************************************************************************/ |
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void up_ledinit(void) |
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{ |
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register uint8_t regval; |
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/* Make sure that the LEDs are in the OFF state */ |
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regval = getreg8(GREENYELLOW_LED_PORT); |
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regval |= (GREEN_LED_OFF |YELLOW_LED_OFF); |
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putreg8(regval, GREENYELLOW_LED_PORT); |
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regval = getreg8(RED_LED_PORT); |
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regval |= RED_LED_OFF; |
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putreg8(regval, RED_LED_PORT); |
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/* Set the direction to output */ |
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regval = getreg8(GREENYELLOW_DIR_PORT); |
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regval |= (GREEN_LED |YELLOW_LED); |
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putreg8(regval, GREENYELLOW_DIR_PORT); |
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regval = getreg8(RED_DIR_PORT); |
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regval |= RED_LED; |
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putreg8(regval, RED_DIR_PORT); |
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} |
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/************************************************************************************ |
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* Name: up_ledon |
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************************************************************************************/ |
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void up_ledon(int led) |
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{ |
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uint8_t ledset; |
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/* If this is the ASSERTION led, preserve the Y&G bits from the last setting and |
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* set the RED LED on. |
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*/ |
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if (led == LED_ASSERTION) |
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{ |
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ledset = g_ledstate[g_prevled[g_nestlevel]]; |
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up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_ON); |
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} |
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else if (led < LED_ASSERTION) |
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{ |
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/* Otherwise, just show the LEDs corresponding to this state */ |
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ledset = g_ledstate[led]; |
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up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK); |
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/* If this was a nested states (INIRQ, SIGNAL, or ASSERTION) then |
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* stack up the previous value. |
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*/ |
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if (led > LED_STACKCREATED) |
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{ |
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g_nestlevel++; |
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} |
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g_prevled[g_nestlevel] = led; |
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} |
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} |
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/************************************************************************************ |
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* Name: up_ledoff |
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************************************************************************************/ |
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void up_ledoff(int led) |
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{ |
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uint8_t ledset; |
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/* If this is the ASSERTION led then what we do depends on the previous state */ |
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if (led == LED_ASSERTION) |
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{ |
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/* If the previous state was one of the nested states (INIRQ, SIGNAL, or ASSERTION), |
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* then turn the green and yellow LEDs all off. That way we can distinguish |
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* that case from the simple cases. |
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*/ |
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if (g_nestlevel > 0) |
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{ |
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ledset = 0; |
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} |
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else |
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{ |
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ledset = g_ledstate[g_prevled[0]]; |
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} |
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up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_OFF); |
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} |
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else if (led > 0 && led < LED_ASSERTION) |
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{ |
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/* If this was one of the nested states, then we want to back to the LED setting |
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* before entering that nested statel. |
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*/ |
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if (g_nestlevel > 0) |
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{ |
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g_nestlevel--; |
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led = g_prevled[g_nestlevel]; |
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} |
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else if (led > LED_STACKCREATED) |
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{ |
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/* This shouldn't happen */ |
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led--; |
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} |
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ledset = g_ledstate[led]; |
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up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK); |
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g_prevled[g_nestlevel]= led; |
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} |
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} |
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#endif /* CONFIG_ARCH_LEDS */
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