153 lines
5.1 KiB
C
153 lines
5.1 KiB
C
/**************************************************************************
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* arch/avr/src/at90usb/at90usb_lowinit.c
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*
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* Copyright (C) 2011 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 NuttX 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 <avr/wdt.h>
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#include <avr/power.h>
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#include "at90usb_config.h"
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#include "up_internal.h"
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#include "at90usb_internal.h"
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/**************************************************************************
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* Private Definitions
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**************************************************************************/
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#if defined(CONFIG_WDTO_15MS)
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# define WDTO_VALUE WDTO_15MS
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#elif defined(CONFIG_WDTO_30MS)
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# define WDTO_VALUE WDTO_30MS
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#elif defined(CONFIG_WDTO_60MS)
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# define WDTO_VALUE WDTO_60MS
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#elif defined(CONFIG_WDTO_120MS)
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# define WDTO_VALUE WDTO_120MS
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#elif defined(CONFIG_WDTO_1250MS)
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# define WDTO_VALUE WDTO_250MS
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#elif defined(CONFIG_WDTO_500MS)
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# define WDTO_VALUE WDTO_500MS
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#elif defined(CONFIG_WDTO_1S)
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# define WDTO_VALUE WDTO_1S
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#elif defined(CONFIG_WDTO_2S)
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# define WDTO_VALUE WDTO_2S
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#elif defined(CONFIG_WDTO_4S)
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# define WDTO_VALUE WDTO_4S
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#else /* if defined(CONFIG_WDTO_8S) */
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# define WDTO_VALUE WDTO_8S
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#endif
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/**************************************************************************
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* Private Types
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**************************************************************************/
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/**************************************************************************
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* Private Function Prototypes
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**************************************************************************/
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/**************************************************************************
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* Global Variables
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**************************************************************************/
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/**************************************************************************
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* Private Variables
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**************************************************************************/
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/**************************************************************************
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* Private Functions
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**************************************************************************/
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/**************************************************************************
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* Name: up_wdtinit
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*
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* Description:
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* Initialize the watchdog per the NuttX configuration.
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*
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**************************************************************************/
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static inline void up_wdtinit(void)
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{
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#ifndef CONFIG_AVR_WDT
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wdt_disable();
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#else
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wdt_enable(WDTO_VALUE);
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#endif
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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_lowinit
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*
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* Description:
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* This performs basic initialization of the USART used for the serial
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* console. Its purpose is to get the console output availabe as soon
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* as possible.
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*
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**************************************************************************/
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void up_lowinit(void)
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{
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/* Initialize the watchdog timer */
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up_wdtinit();
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/* Set the system clock divider to 1 */
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clock_prescale_set(clock_div_1);
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/* Initialize a console (probably a serial console) */
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up_consoleinit();
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/* Perform early serial initialization (so that we will have debug output
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* available as soon as possible).
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*/
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#ifdef CONFIG_USE_EARLYSERIALINIT
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up_earlyserialinit();
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#endif
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/* Perform board-level initialization */
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up_boardinitialize();
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}
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