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/**
* @file
*
* @ingroup lpc24xx
*
* @brief Startup code.
*/
/*
* Copyright (c) 2008, 2009
* embedded brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <bsp/dma.h>
#include <bsp/io.h>
#include <bsp/irq-generic.h>
#include <bsp/irq.h>
#include <bsp/linker-symbols.h>
#include <bsp/lpc24xx.h>
#include <bsp/stackalloc.h>
#include <bsp/system-clocks.h>
#ifdef LPC24XX_HEAP_EXTEND
LINKER_SYMBOL(lpc24xx_region_heap_0_begin);
LINKER_SYMBOL(lpc24xx_region_heap_0_size);
LINKER_SYMBOL(lpc24xx_region_heap_0_end);
LINKER_SYMBOL(lpc24xx_region_heap_1_begin);
LINKER_SYMBOL(lpc24xx_region_heap_1_size);
LINKER_SYMBOL(lpc24xx_region_heap_1_end);
extern Heap_Control *RTEMS_Malloc_Heap;
#endif
void bsp_pretasking_hook(void)
{
#ifdef LPC24XX_HEAP_EXTEND
_Heap_Extend(
RTEMS_Malloc_Heap,
lpc24xx_region_heap_0_begin,
(uintptr_t) lpc24xx_region_heap_0_size,
NULL
);
_Heap_Extend(
RTEMS_Malloc_Heap,
lpc24xx_region_heap_1_begin,
(uintptr_t) lpc24xx_region_heap_1_size,
NULL
);
#endif
}
void bsp_start(void)
{
/* Initialize Timer 1 */
lpc24xx_module_enable(LPC24XX_MODULE_TIMER_1, LPC24XX_MODULE_CCLK);
/* Initialize standard timer */
lpc24xx_timer_initialize();
/* Initialize console */
#ifdef LPC24XX_CONFIG_CONSOLE
lpc24xx_module_enable(LPC24XX_MODULE_UART_0, LPC24XX_MODULE_CCLK);
lpc24xx_io_config(LPC24XX_MODULE_UART_0, LPC24XX_CONFIG_CONSOLE);
U0LCR = 0;
U0IER = 0;
U0LCR = 0x80;
U0DLL = lpc24xx_cclk() / 16 / LPC24XX_UART_BAUD;
U0DLM = 0;
U0LCR = 0x03;
U0FCR = 0x07;
#endif
/* Interrupts */
if (bsp_interrupt_initialize() != RTEMS_SUCCESSFUL) {
_CPU_Fatal_halt(0xe);
}
/* DMA */
lpc24xx_dma_initialize();
/* Task stacks */
#ifdef LPC24XX_SPECIAL_TASK_STACKS_SUPPORT
bsp_stack_initialize(
bsp_section_stack_begin,
(uintptr_t) bsp_section_stack_size
);
#endif
/* UART configurations */
#ifdef LPC24XX_CONFIG_UART_1
lpc24xx_module_enable(LPC24XX_MODULE_UART_1, LPC24XX_MODULE_CCLK);
lpc24xx_io_config(LPC24XX_MODULE_UART_1, LPC24XX_CONFIG_UART_1);
#endif
#ifdef LPC24XX_CONFIG_UART_2
lpc24xx_module_enable(LPC24XX_MODULE_UART_2, LPC24XX_MODULE_CCLK);
lpc24xx_io_config(LPC24XX_MODULE_UART_2, LPC24XX_CONFIG_UART_2);
#endif
#ifdef LPC24XX_CONFIG_UART_3
lpc24xx_module_enable(LPC24XX_MODULE_UART_3, LPC24XX_MODULE_CCLK);
lpc24xx_io_config(LPC24XX_MODULE_UART_3, LPC24XX_CONFIG_UART_3);
#endif
}
#define ULSR_THRE 0x00000020U
static void lpc24xx_BSP_output_char(char c)
{
while (IS_FLAG_CLEARED(U0LSR, ULSR_THRE)) {
/* Wait */
}
U0THR = c;
if (c == '\n') {
while (IS_FLAG_CLEARED(U0LSR, ULSR_THRE)) {
/* Wait */
}
U0THR = '\r';
}
}
BSP_output_char_function_type BSP_output_char = lpc24xx_BSP_output_char;
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