1 /*
2  * Copyright (c) 2006-2022, RT-Thread Development Team
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  *
6  * Change Logs:
7  * Date           Author            Notes
8  * 2021-01-04     iysheng           first version
9  * 2021-09-07     idk500            suit for Vango V85xx
10  * 2021-09-08     ZhuXW             add delay function
11  */
12 
13 #include <stdint.h>
14 #include <rthw.h>
15 #include <rtthread.h>
16 
17 #include <target.h>
18 #include <board.h>
19 #include <drv_usart.h>
20 
21 /*
22  * System Clock Configuration
23  */
SystemClock_Config(void)24 void SystemClock_Config(void)
25 {
26 //     SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
27   NVIC_SetPriority(SysTick_IRQn, 0);
28   CLK_InitTypeDef CLK_Struct;
29 
30   CLK_Struct.ClockType = CLK_TYPE_AHBSRC \
31                         |CLK_TYPE_PLLL   \
32                         |CLK_TYPE_HCLK   \
33                         |CLK_TYPE_PCLK;
34   CLK_Struct.AHBSource      = CLK_AHBSEL_LSPLL;
35 
36   CLK_Struct.PLLL.Frequency = CLK_PLLL_26_2144MHz;
37   CLK_Struct.PLLL.Source    = CLK_PLLLSRC_XTALL;
38   CLK_Struct.PLLL.State     = CLK_PLLL_ON;
39   CLK_Struct.HCLK.Divider   = 1;
40   CLK_Struct.PCLK.Divider   = 2;
41   CLK_ClockConfig(&CLK_Struct);
42 }
43 
44 /*
45  * This is the timer interrupt service routine.
46  */
SysTick_Handler(void)47 void SysTick_Handler(void)
48 {
49     /* enter interrupt */
50     rt_interrupt_enter();
51 
52     rt_tick_increase();
53 
54     /* leave interrupt */
55     rt_interrupt_leave();
56 }
57 
58 /**
59  * This function will initial V85xx board.
60  */
rt_hw_board_init()61 void rt_hw_board_init()
62 {
63     SystemClock_Config();
64 
65 #ifdef RT_USING_COMPONENTS_INIT
66     rt_components_board_init();
67 #endif
68 
69 #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
70     rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
71 #endif
72 
73 #ifdef BSP_USING_SDRAM
74     rt_system_heap_init((void *)EXT_SDRAM_BEGIN, (void *)EXT_SDRAM_END);
75 #else
76     rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
77 #endif
78 }
79 
rt_hw_us_delay(rt_uint32_t us)80 void rt_hw_us_delay(rt_uint32_t us)
81 {
82     rt_uint32_t ticks;
83     rt_uint32_t told, tnow, tcnt = 0;
84     rt_uint32_t reload = SysTick->LOAD;
85 
86     ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
87     told = SysTick->VAL;
88     while (1)
89     {
90         tnow = SysTick->VAL;
91         if (tnow != told)
92         {
93             if (tnow < told)
94             {
95                 tcnt += told - tnow;
96             }
97             else
98             {
99                 tcnt += reload - tnow + told;
100             }
101             told = tnow;
102             if (tcnt >= ticks)
103             {
104                 break;
105             }
106         }
107     }
108 }
109 /*@}*/
110