kopia lustrzana https://github.com/OpenRTX/OpenRTX
85 wiersze
2.7 KiB
C
85 wiersze
2.7 KiB
C
/***************************************************************************
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* Copyright (C) 2024 - 2025 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* Morgan Diepart ON4MOD *
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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 3 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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* 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 <hwconfig.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_NUM
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};
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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 rcc_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 rcc_getBusClock(PERIPH_BUS_APB1);
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break;
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case APB2PERIPH_BASE:
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return rcc_getBusClock(PERIPH_BUS_APB2);
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break;
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case AHB1PERIPH_BASE:
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case AHB2PERIPH_BASE:
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return rcc_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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