97 lines
3.8 KiB
C
97 lines
3.8 KiB
C
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Lucian Copeland for Adafruit Industries
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* Copyright (c) 2020 Mark Olsson <mark@markolsson.se>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mpconfig.h"
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#ifndef BOARD_OSC_DIV
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#define BOARD_OSC_DIV (8)
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#endif
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#ifndef BOARD_OSC_PLLN
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#define BOARD_OSC_PLLN (432)
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#endif
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#ifndef BOARD_OSC_PLLQ
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#define BOARD_OSC_PLLQ (9)
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#endif
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#ifndef BOARD_FLASH_LATENCY
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#define BOARD_FLASH_LATENCY FLASH_LATENCY_7
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#endif
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#ifndef BOARD_OSC_HSESTATE
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#define BOARD_OSC_HSESTATE RCC_HSE_BYPASS
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#endif
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void stm32_peripherals_clocks_init(void) {
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = BOARD_OSC_HSESTATE;
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RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = BOARD_OSC_DIV;
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RCC_OscInitStruct.PLL.PLLN = BOARD_OSC_PLLN;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = BOARD_OSC_PLLQ;
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HAL_RCC_OscConfig(&RCC_OscInitStruct);
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/* Activate the OverDrive to reach the 216 MHz Frequency */
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HAL_PWREx_EnableOverDrive();
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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HAL_RCC_ClockConfig(&RCC_ClkInitStruct, BOARD_FLASH_LATENCY);
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#ifdef STM32F746G_DISCO
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RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
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PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CLK48;
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PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
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PeriphClkInitStruct.PLLSAI.PLLSAIR = 2;
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PeriphClkInitStruct.PLLSAI.PLLSAIQ = 2;
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PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV4;
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PeriphClkInitStruct.PLLSAIDivQ = 1;
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PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_2;
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PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48SOURCE_PLLSAIP;
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HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
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#endif
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}
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