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https://github.com/eddyem/stm32samples.git
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31 lines
1.3 KiB
C
31 lines
1.3 KiB
C
/*
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* This file is part of the test project.
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* Copyright 2026 Edward V. Emelianov <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 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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#include "hardware.h"
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void gpio_setup(){
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RCC->IOPENR = RCC_IOPENR_GPIOCEN | RCC_IOPENR_GPIOBEN;
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// set PC8 as opendrain output, PC0 is pullup input, other as default (AIN)
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GPIOC->MODER = (0xffffffff & ~(GPIO_MODER_MODE6 | GPIO_MODER_MODE13)) | GPIO_MODER_MODER6_O; // GPIO_MODER_MODER13_I == 0
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GPIOC->PUPDR = GPIO_PUPDR13_PD; // pull down
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// USART1: PB6 - Tx (AF0), PB7 - Rx (AF0)
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GPIOB->MODER = MODER_AF(6) | MODER_AF(7);
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GPIOB->AFR[0] = 0;
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// RCC->CCIPR = 0; // default -> sysclk/pclk source
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}
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