127 lines
5.0 KiB
C
127 lines
5.0 KiB
C
/****************************************************************************
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* boards/arm/sam34/sam4s-xplained/src/sam4s-xplained.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __BOARDS_ARM_SAM4S_XPLAINED_SRC_SAM4S_XPLAINED_H
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#define __BOARDS_ARM_SAM4S_XPLAINED_SRC_SAM4S_XPLAINED_H
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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 <nuttx/compiler.h>
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#include <stdint.h>
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#include <arch/irq.h>
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#include <nuttx/irq.h>
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#include "hardware/sam_pinmap.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* There are four LEDs on board the SAM4S Xplained board, two of these can be
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* controlled by software in the SAM4S:
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*
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* LED GPIO
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* ---------------- -----
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* D9 Yellow LED PC10
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* D10 Yellow LED PC17
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*
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* Both can be illuminated by driving the GPIO output to ground (low).
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*
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* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
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* defined. In that case, the usage by the board port is defined in
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* include/board.h and src/up_leds.c. The LEDs are used to encode OS-related
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* events as follows:
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*
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* SYMBOL Meaning LED state
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* D9 D10
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* ------------------- ----------------------- -------- --------
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* LED_STARTED NuttX has been started OFF OFF
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* LED_HEAPALLOCATE Heap has been allocated OFF OFF
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* LED_IRQSENABLED Interrupts enabled OFF OFF
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* LED_STACKCREATED Idle stack created ON OFF
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* LED_INIRQ In an interrupt No change
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* LED_SIGNAL In a signal handler No change
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* LED_ASSERTION An assertion failed No change
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* LED_PANIC The system has crashed OFF Blinking
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* LED_IDLE MCU is is sleep mode Not used
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*
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* Thus if D9 is statically on, NuttX has successfully booted and is,
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* apparently, running normmally. If D10 is flashing at approximately
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* 2Hz, then a fatal error has been detected and the system has halted.
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*/
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#define GPIO_D9 (GPIO_OUTPUT | GPIO_CFG_PULLUP | GPIO_OUTPUT_SET | \
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GPIO_PORT_PIOC | GPIO_PIN10)
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#define GPIO_D10 (GPIO_OUTPUT | GPIO_CFG_PULLUP | GPIO_OUTPUT_SET | \
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GPIO_PORT_PIOC | GPIO_PIN17)
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/* Mechanical buttons:
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*
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* The SAM4S Xplained has two mechanical buttons.
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* One button is the RESET button connected to the SAM4S reset line and the
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* other is a generic user configurable button labeled BP2.
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* When a button is pressed it will drive the I/O line to GND.
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*
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* PA5 BP2
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*/
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#define GPIO_BP2 (GPIO_INPUT | GPIO_CFG_PULLUP | GPIO_CFG_DEGLITCH | \
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GPIO_INT_BOTHEDGES | GPIO_PORT_PIOA | GPIO_PIN5)
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#define IRQ_BP2 SAM_IRQ_PA5
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/* SRAM Enable. EBI_NLB PC16. Active=low; Standby=high */
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#define GPIO_EBI_NLB (GPIO_OUTPUT | GPIO_CFG_PULLUP | GPIO_OUTPUT_SET | \
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GPIO_PORT_PIOC | GPIO_PIN16)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Public Functions Definitions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_sram_initialize
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*
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* Description:
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* Configure and enable SRAM on board the SAM4S Xplained
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*
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****************************************************************************/
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#ifdef CONFIG_SAM34_EXTSRAM0
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void sam_sram_initialize(void);
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __BOARDS_ARM_SAM34_SAM4S_XPLAINED_SRC_SAM4S_XPLAINED_H */
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