kopia lustrzana https://github.com/OpenRTX/OpenRTX
109 wiersze
3.6 KiB
C
109 wiersze
3.6 KiB
C
/***************************************************************************
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* Copyright (C) 2018 by Terraneo Federico *
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* 2024 - 2025 by Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* As a special exception, if other files instantiate templates or use *
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* macros or inline functions from this file, or you compile this file *
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* and link it with other works to produce a work based on this file, *
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* this file does not by itself cause the resulting work to be covered *
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* by the GNU General Public License. However the source code for this *
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* file must still be made available in accordance with the GNU General *
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* Public License. This exception does not invalidate any other reasons *
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* why a work based on this file might be covered by the GNU General *
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* Public License. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#ifndef RCC_H
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#define RCC_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Enumeration type for STM32 internal busses.
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*/
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enum PeriphBus
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{
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PERIPH_BUS_AHB = 0,
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PERIPH_BUS_APB1 = 1,
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PERIPH_BUS_APB2 = 2,
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PERIPH_BUS_APB3 = 3,
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PERIPH_BUS_APB4 = 4,
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PERIPH_BUS_NUM
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};
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/**
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* Configure and start the PLL.
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*/
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void startPll();
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/**
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* Get the clock frequency of a given peripheral bus.
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*
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* @param bus: bus identifier.
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* @return bus clock frequency in Hz or zero in case of errors.
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*/
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uint32_t getBusClock(const uint8_t bus);
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#ifdef __cplusplus
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}
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/**
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* Get the clock frequency of the bus a peripheral is attached to.
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*
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* @param periph: peripheral base address
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* @return bus clock frequency in Hz or zero in case of errors.
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*/
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static constexpr uint32_t rcc_getPeriphClock(const void *periph)
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{
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uint32_t addr = reinterpret_cast<uint32_t>(periph);
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switch(addr & 0xFFFF0000) {
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case APB1PERIPH_BASE:
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return getBusClock(PERIPH_BUS_APB1);
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break;
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case APB2PERIPH_BASE:
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return getBusClock(PERIPH_BUS_APB2);
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break;
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case D1_APB1PERIPH_BASE:
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return getBusClock(PERIPH_BUS_APB3);
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break;
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case D3_APB1PERIPH_BASE:
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return getBusClock(PERIPH_BUS_APB4);
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break;
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case AHB1PERIPH_BASE:
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case AHB2PERIPH_BASE:
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case D1_AHB1PERIPH_BASE:
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case D3_AHB1PERIPH_BASE:
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return getBusClock(PERIPH_BUS_AHB);
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break;
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}
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return 0;
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}
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#endif
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#endif //RCC_H
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