/*
 *                                                                                                  geany_encoding=koi8-r
 * hardware.c - hardware-dependent macros & functions
 *
 * Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 */

#include "hardware.h"

// pause in milliseconds for some purposes
void pause_ms(uint32_t pause){
    uint32_t Tnxt = Tms + pause;
    while(Tms < Tnxt) nop();
}

static inline void gpio_setup(){
    // Enable clocks to the GPIO subsystems (PB for ADC), turn on AFIO clocking to disable SWD/JTAG
    RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_AFIOEN;
    // turn off SWJ/JTAG
//    AFIO->MAPR = AFIO_MAPR_SWJ_CFG_DISABLE;
    // turn off USB pullup
    GPIOA->ODR = (1<<13); // turn off usb pullup & turn on pullups for buttons
    // Set led as opendrain output
    GPIOC->CRH |= CRH(13, CNF_ODOUTPUT|MODE_SLOW);
    // USB pullup (PA13) - opendrain output
    GPIOA->CRH = CRH(13, CNF_ODOUTPUT|MODE_SLOW);
}

void hw_setup(){
    gpio_setup();
}