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| 1 | +/* |
| 2 | + ******************************************************************************* |
| 3 | + * Copyright (c) 2023-2023, AirM2M, HalfSweet |
| 4 | + * All rights reserved. |
| 5 | + * |
| 6 | + * This software component is licensed by ST under BSD 3-Clause license, |
| 7 | + * the "License"; You may not use this file except in compliance with the |
| 8 | + * License. You may obtain a copy of the License at: |
| 9 | + * opensource.org/licenses/BSD-3-Clause |
| 10 | + * |
| 11 | + ******************************************************************************* |
| 12 | + */ |
| 13 | +#if defined(ARDUINO_AIR32F103CB) |
| 14 | +#include "pins_arduino.h" |
| 15 | + |
| 16 | +#include <stdint.h> |
| 17 | + |
| 18 | +enum class ClockSource : uint8_t |
| 19 | +{ |
| 20 | + HSI = 0, |
| 21 | + HSE = 1, |
| 22 | +}; |
| 23 | + |
| 24 | +namespace CuluateClock |
| 25 | +{ |
| 26 | + constexpr uint8_t GetPLLMultiplier(ClockSource soure, uint32_t sourceFreq, uint32_t sysFrequency) |
| 27 | + { |
| 28 | + if (soure == ClockSource::HSI) |
| 29 | + { |
| 30 | + sourceFreq /= 2; |
| 31 | + } |
| 32 | + if (sysFrequency % sourceFreq != 0) |
| 33 | + { |
| 34 | + return (sysFrequency / sourceFreq) - 1; |
| 35 | + } |
| 36 | + else |
| 37 | + { |
| 38 | + return sysFrequency / sourceFreq; |
| 39 | + } |
| 40 | + } |
| 41 | + |
| 42 | + constexpr uint32_t Get_RCC_CFGR_PLLMULL(uint8_t multiplier) |
| 43 | + { |
| 44 | + uint32_t mulTable[] = { |
| 45 | + RCC_PLL_MUL2, RCC_PLL_MUL3, RCC_PLL_MUL4, RCC_PLL_MUL5, RCC_PLL_MUL6, RCC_PLL_MUL7, RCC_PLL_MUL8, RCC_PLL_MUL9, |
| 46 | + RCC_PLL_MUL10, RCC_PLL_MUL11, RCC_PLL_MUL12, RCC_PLL_MUL13, RCC_PLL_MUL14, RCC_PLL_MUL15, RCC_PLL_MUL16, RCC_PLL_MUL17, |
| 47 | + RCC_PLL_MUL18, RCC_PLL_MUL19, RCC_PLL_MUL20, RCC_PLL_MUL21, RCC_PLL_MUL22, RCC_PLL_MUL23, RCC_PLL_MUL24, RCC_PLL_MUL25, |
| 48 | + RCC_PLL_MUL26, RCC_PLL_MUL27, RCC_PLL_MUL28, RCC_PLL_MUL29, RCC_PLL_MUL30, RCC_PLL_MUL31, RCC_PLL_MUL32}; |
| 49 | + if (multiplier > 32 || multiplier < 2) |
| 50 | + { |
| 51 | + return 0xFFFFFFFF; |
| 52 | + } |
| 53 | + else |
| 54 | + { |
| 55 | + return mulTable[multiplier - 2]; |
| 56 | + } |
| 57 | + } |
| 58 | +} |
| 59 | + |
| 60 | +/** |
| 61 | + * @brief System Clock Configuration |
| 62 | + * @param None |
| 63 | + * @retval None |
| 64 | + */ |
| 65 | +WEAK void SystemClock_Config(void) |
| 66 | +#if defined(USBCON) |
| 67 | +{ |
| 68 | + RCC_OscInitTypeDef RCC_OscInitStruct = {}; |
| 69 | + RCC_ClkInitTypeDef RCC_ClkInitStruct = {}; |
| 70 | + RCC_PeriphCLKInitTypeDef PeriphClkInit = {}; |
| 71 | + |
| 72 | + /** Initializes the RCC Oscillators according to the specified parameters |
| 73 | + * in the RCC_OscInitTypeDef structure. |
| 74 | + */ |
| 75 | + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; |
| 76 | + RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
| 77 | + RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
| 78 | + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
| 79 | + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2; |
| 80 | + RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12; |
| 81 | + if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) |
| 82 | + { |
| 83 | + Error_Handler(); |
| 84 | + } |
| 85 | + /** Initializes the CPU, AHB and APB buses clocks |
| 86 | + */ |
| 87 | + RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; |
| 88 | + RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; |
| 89 | + RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; |
| 90 | + RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; |
| 91 | + RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; |
| 92 | + |
| 93 | + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) |
| 94 | + { |
| 95 | + Error_Handler(); |
| 96 | + } |
| 97 | + PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB; |
| 98 | + PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL; |
| 99 | + if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) |
| 100 | + { |
| 101 | + Error_Handler(); |
| 102 | + } |
| 103 | +} |
| 104 | +#else |
| 105 | +{ |
| 106 | + RCC_OscInitTypeDef RCC_OscInitStruct = {}; |
| 107 | + RCC_ClkInitTypeDef RCC_ClkInitStruct = {}; |
| 108 | + |
| 109 | + /** Initializes the RCC Oscillators according to the specified parameters |
| 110 | + * in the RCC_OscInitTypeDef structure. |
| 111 | + */ |
| 112 | +#if defined(USE_HSI) |
| 113 | + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; |
| 114 | + RCC_OscInitStruct.HSIState = RCC_HSI_ON; |
| 115 | + RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; |
| 116 | + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI_DIV2; |
| 117 | + constexpr uint32_t sourceFreq = CLOCK_SOURCE; |
| 118 | + constexpr auto clockSource = ClockSource::HSI; |
| 119 | + constexpr auto sysClkSource = RCC_SYSCLKSOURCE_HSI; |
| 120 | +#elif defined(USE_HSE) |
| 121 | +#undef HSE_VALUE |
| 122 | +#define HSE_VALUE CLOCK_SOURCE |
| 123 | + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
| 124 | + RCC_OscInitStruct.HSIState = RCC_HSI_OFF; |
| 125 | + RCC_OscInitStruct.HSEState = RCC_HSE_ON; |
| 126 | + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; |
| 127 | + constexpr uint32_t sourceFreq = CLOCK_SOURCE; |
| 128 | + constexpr auto clockSource = ClockSource::HSE; |
| 129 | + constexpr auto sysClkSource = RCC_SYSCLKSOURCE_HSE; |
| 130 | +#else |
| 131 | +#error "No clock source defined" |
| 132 | +#endif |
| 133 | + |
| 134 | + constexpr uint32_t sysFrequency = F_CPU; |
| 135 | + constexpr uint8_t multiplier = CuluateClock::GetPLLMultiplier(clockSource, sourceFreq, sysFrequency); |
| 136 | + if (multiplier < 2) |
| 137 | + { |
| 138 | + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_OFF; |
| 139 | + RCC_ClkInitStruct.SYSCLKSource = sysClkSource; |
| 140 | + } |
| 141 | + else |
| 142 | + { |
| 143 | + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; |
| 144 | + RCC_OscInitStruct.PLL.PLLMUL = CuluateClock::Get_RCC_CFGR_PLLMULL(multiplier); |
| 145 | + RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; |
| 146 | + } |
| 147 | + |
| 148 | + if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) |
| 149 | + { |
| 150 | + Error_Handler(); |
| 151 | + } |
| 152 | + /** Initializes the CPU, AHB and APB buses clocks |
| 153 | + */ |
| 154 | + RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; |
| 155 | + RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; |
| 156 | + RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; |
| 157 | + RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; |
| 158 | + |
| 159 | + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) |
| 160 | + { |
| 161 | + Error_Handler(); |
| 162 | + } |
| 163 | +} |
| 164 | +#endif /* USBCON */ |
| 165 | + |
| 166 | +#endif /* ARDUINO_GENERIC_* */ |
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