1 /*
2  * Copyright (c) 2006-2021, RT-Thread Development Team
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  *
6  * Change Logs:
7  * Date           Author       Notes
8  * 2009-01-05     Bernard      first implementation
9  * 2014-06-20     xiaonong     ported to LPC43xx
10  */
11 
12 #include <rthw.h>
13 #include <rtthread.h>
14 
15 #include "board.h"
16 #include "drv_uart.h"
17 
18 
19 /**
20  * This is the timer interrupt service routine.
21  *
22  */
SysTick_Handler(void)23 void SysTick_Handler(void)
24 {
25     /* enter interrupt */
26     rt_interrupt_enter();
27 
28     rt_tick_increase();
29 
30     /* leave interrupt */
31     rt_interrupt_leave();
32 }
33 
34 extern void SystemCoreClockUpdate(void);
35 /**
36  * This function will initial LPC43xx board.
37  */
rt_hw_board_init()38 void rt_hw_board_init()
39 {
40 #ifdef CORE_M4
41     /* NVIC Configuration */
42 #define NVIC_VTOR_MASK              0x3FFFFF80
43 #ifdef  VECT_TAB_RAM
44     /* Set the Vector Table base location at 0x10000000 */
45     SCB->VTOR  = (0x10000000 & NVIC_VTOR_MASK);
46 #else  /* VECT_TAB_FLASH  */
47     /* Set the Vector Table base location at 0x00000000 */
48     SCB->VTOR  = (0x00000000 & NVIC_VTOR_MASK);
49 #endif
50 #endif
51     /* update the core clock */
52     SystemCoreClockUpdate();
53 
54     /* init systick */
55     SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
56 
57     /* set pend exception priority */
58     NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
59 
60     /* init uart device */
61     rt_hw_uart_init();
62 
63     /* setup the console device */
64     rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
65 
66 #if LPC_EXT_SDRAM == 1
67     lpc_sdram_hw_init();
68     mpu_init();
69 #endif
70 }
71 
72 
73 
74