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 * 2018-11-06 SummerGift first version
9 */
10
11 #include <board.h>
12 #include <drv_common.h>
13
SystemClock_Config(void)14 void SystemClock_Config(void)
15 {
16
17 RCC_OscInitTypeDef RCC_OscInitStruct;
18 RCC_ClkInitTypeDef RCC_ClkInitStruct;
19 RCC_PeriphCLKInitTypeDef PeriphClkInit;
20
21 /**Configure LSE Drive Capability
22 */
23 HAL_PWR_EnableBkUpAccess();
24
25 __HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
26
27 /**Initializes the CPU, AHB and APB busses clocks
28 */
29 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE|RCC_OSCILLATORTYPE_MSI;
30 RCC_OscInitStruct.LSEState = RCC_LSE_ON;
31 RCC_OscInitStruct.MSIState = RCC_MSI_ON;
32 RCC_OscInitStruct.MSICalibrationValue = 0;
33 RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
34 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
35 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
36 RCC_OscInitStruct.PLL.PLLM = 1;
37 RCC_OscInitStruct.PLL.PLLN = 16;
38 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
39 RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
40 RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
41 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
42 {
43 _Error_Handler(__FILE__, __LINE__);
44 }
45
46 /**Initializes the CPU, AHB and APB busses clocks
47 */
48 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
49 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
50 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
51 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
52 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
53 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
54
55 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
56 {
57 _Error_Handler(__FILE__, __LINE__);
58 }
59
60 PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
61 PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
62 if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
63 {
64 _Error_Handler(__FILE__, __LINE__);
65 }
66
67 /**Configure the main internal regulator output voltage
68 */
69 if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
70 {
71 _Error_Handler(__FILE__, __LINE__);
72 }
73
74 /**Configure the Systick interrupt time
75 */
76 HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
77
78 /**Configure the Systick
79 */
80 HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
81
82 /**Enable MSI Auto calibration
83 */
84 HAL_RCCEx_EnableMSIPLLMode();
85
86 /* SysTick_IRQn interrupt configuration */
87 HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
88 }
89