mirror of
https://github.com/apache/nuttx.git
synced 2026-08-18 20:18:17 +00:00
140 lines
4.7 KiB
C
140 lines
4.7 KiB
C
/****************************************************************************
|
|
* boards/arm/sam34/sam4e-ek/src/sam_boot.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/board.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "sam4e-ek.h"
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: board_config_usart1
|
|
*
|
|
* Description:
|
|
* USART1: To avoid any electrical conflict, the RS232 and RS485
|
|
* transceiver are isolated from the receiving line PA21.
|
|
*
|
|
* - Chose RS485 channel: Close 1-2 pins on JP11 and set PA23 to high level
|
|
* - Chose RS232 channel: Close 2-3 pins on JP11 and set PA23 to low level
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_SAM34_USART1
|
|
static inline void board_config_usart1(void)
|
|
{
|
|
#if defined(CONFIG_USART1_RS485)
|
|
sam_configgpio(GPIO_RS485_ENABLE);
|
|
#else /* if defined(CONFIG_USART1_SERIALDRIVER) */
|
|
sam_configgpio(GPIO_RS232_ENABLE);
|
|
#endif
|
|
}
|
|
#else
|
|
# define board_config_usart1()
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: sam_boardinitialize
|
|
*
|
|
* Description:
|
|
* All SAM3U architectures must provide the following entry point.
|
|
* This entry point is called early in the initialization -- after all
|
|
* memory has been configured and mapped but before any devices have been
|
|
* initialized.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void sam_boardinitialize(void)
|
|
{
|
|
/* Configure USART1 for RS-232/RS-485 operation */
|
|
|
|
board_config_usart1();
|
|
|
|
/* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak
|
|
* function sam_spidev_initialize() has been brought into the link.
|
|
*/
|
|
|
|
#ifdef CONFIG_SAM34_SPI0
|
|
if (sam_spidev_initialize)
|
|
{
|
|
sam_spidev_initialize();
|
|
}
|
|
#endif
|
|
|
|
/* Configure board resources to support networkingif the 1) networking is
|
|
* enabled, 2) the EMAC module is enabled, and 2) the weak function
|
|
* sam_netinitialize() has been brought into the build.
|
|
*/
|
|
|
|
#ifdef HAVE_NETWORK
|
|
if (sam_netinitialize)
|
|
{
|
|
sam_netinitialize();
|
|
}
|
|
#endif
|
|
|
|
/* Configure on-board LEDs if LED support has been selected. */
|
|
|
|
#ifdef CONFIG_ARCH_LEDS
|
|
board_autoled_initialize();
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: board_late_initialize
|
|
*
|
|
* Description:
|
|
* If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
|
|
* initialization call will be performed in the boot-up sequence to a
|
|
* function called board_late_initialize(). board_late_initialize() will be
|
|
* called immediately after up_initialize() is called and just before the
|
|
* initial application is started. This additional initialization phase
|
|
* may be used, for example, to initialize board-specific device drivers.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_BOARD_LATE_INITIALIZE
|
|
void board_late_initialize(void)
|
|
{
|
|
/* Perform NSH initialization here instead of from the NSH.
|
|
* This alternative NSH initialization is necessary when NSH is ran in
|
|
* user-space but the initialization function must run in kernel space.
|
|
*/
|
|
|
|
#if defined(CONFIG_NSH_LIBRARY) && !defined(CONFIG_BOARDCTL)
|
|
board_app_initialize(0);
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_BOARD_LATE_INITIALIZE */
|