source: rtems/bsps/arm/lpc176x/start/bspstart.c

/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup RTEMSBSPsARMLPC176X
 *
 * @brief Startup code.
 */

/*
 * Copyright (C) 2008, 2012 embedded brains GmbH & Co. KG
 *
 * 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.
 *
 * 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.
 */

#include <bsp.h>
#include <bsp/io.h>
#include <bsp/irq.h>
#include <bsp/dma.h>
#include <bsp/bootcard.h>
#include <bsp/timer.h>
#include <bsp/irq-generic.h>
#include <bsp/system-clocks.h>
#include <bsp/linker-symbols.h>
#include <bsp/common-types.h>
#include <bsp/uart-output-char.h>

#ifdef LPC176X_HEAP_EXTEND
LINKER_SYMBOL( lpc176x_region_heap_0_begin );
LINKER_SYMBOL( lpc176x_region_heap_0_size );
LINKER_SYMBOL( lpc176x_region_heap_0_end );
LINKER_SYMBOL( lpc176x_region_heap_1_begin );
LINKER_SYMBOL( lpc176x_region_heap_1_size );
LINKER_SYMBOL( lpc176x_region_heap_1_end );
extern Heap_Control *RTEMS_Malloc_Heap;
#endif

static void heap_extend( void )
{
#ifdef LPC176X_HEAP_EXTEND
  _Heap_Extend( RTEMS_Malloc_Heap,
    lpc176x_region_heap_0_begin,
    (uintptr_t) lpc176x_region_heap_0_size,
    NULL );
  _Heap_Extend( RTEMS_Malloc_Heap,
    lpc176x_region_heap_1_begin,
    (uintptr_t) lpc176x_region_heap_1_size,
    NULL );
#endif
}

/**
 * @brief Console initialization
 */
static void initialize_console( void )
{
#ifdef LPC176X_CONFIG_CONSOLE

  lpc176x_module_enable( LPC176X_MODULE_UART_0, LPC176X_MODULE_PCLK_DEFAULT );

  lpc176x_pin_select( LPC176X_PIN_UART_0_TXD, LPC176X_PIN_FUNCTION_01 );
  lpc176x_pin_select( LPC176X_PIN_UART_0_RXD, LPC176X_PIN_FUNCTION_01 );

  BSP_CONSOLE_UART_INIT( LPC176X_PCLK / 16 / LPC176X_UART_BAUD );
#endif
}

void bsp_start( void )
{
  /* Initialize console */
  initialize_console();

  /*Initialize timer*/
  lpc176x_timer_init( LPC176X_TIMER_1 );
  lpc176x_timer_start( LPC176X_TIMER_1 );

  /* Interrupts */
  bsp_interrupt_initialize();

  /* DMA */
  lpc176x_dma_initialize();

  heap_extend();
}