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48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/*
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* geany_encoding=koi8-r
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* hardware.c - hardware-dependent macros & functions
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*
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* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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#include "hardware.h"
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// pause in milliseconds for some purposes
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void pause_ms(uint32_t pause){
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uint32_t Tnxt = Tms + pause;
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while(Tms < Tnxt) nop();
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}
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static inline void gpio_setup(){
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// Enable clocks to the GPIO subsystems (PB for ADC), turn on AFIO clocking to disable SWD/JTAG
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RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_AFIOEN;
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// turn off SWJ/JTAG
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// AFIO->MAPR = AFIO_MAPR_SWJ_CFG_DISABLE;
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// turn off USB pullup
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GPIOA->ODR = (1<<13); // turn off usb pullup & turn on pullups for buttons
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// Set led as opendrain output
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GPIOC->CRH |= CRH(13, CNF_ODOUTPUT|MODE_SLOW);
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// USB pullup (PA13) - opendrain output
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GPIOA->CRH = CRH(13, CNF_ODOUTPUT|MODE_SLOW);
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}
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void hw_setup(){
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gpio_setup();
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}
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