From 1d3861ef93f8423176c6010ab606abdab00a7cbd Mon Sep 17 00:00:00 2001 From: bnewbold Date: Wed, 31 Mar 2010 08:52:45 +0800 Subject: Major hierarchy reorganization; see README. copy-to-ide and Makefile updated to conform; .gitignore added; LICENSE added --- libmaple/gpio.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 libmaple/gpio.c (limited to 'libmaple/gpio.c') diff --git a/libmaple/gpio.c b/libmaple/gpio.c new file mode 100644 index 0000000..facb514 --- /dev/null +++ b/libmaple/gpio.c @@ -0,0 +1,55 @@ +/* ***************************************************************************** + * 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 3 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, see . + * + * Created: 12/18/09 02:35:49 + * Copyright (c) 2009 Perry L. Hung. All rights reserved. + * + * ****************************************************************************/ + +/** + * @file gpio.c + * + * @brief GPIO initialization routine + */ + +#include "libmaple.h" +#include "stm32f10x_rcc.h" +#include "gpio.h" + +void gpio_init(void) { + /* Turn on clocks for GPIO */ + RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | + RCC_APB2Periph_GPIOB | + RCC_APB2Periph_GPIOC | + RCC_APB2Periph_GPIOD | + RCC_APB2Periph_AFIO, + ENABLE); +} + +void gpio_set_mode(GPIO_Port* port, uint8 gpio_pin, uint8 mode) { + uint32_t tmp; + uint32_t shift = POS(gpio_pin % 8); + GPIOReg CR; + + ASSERT(port); + ASSERT(gpio_pin < 16); + + CR = (gpio_pin < 8) ? &(port->CRL) : &(port->CRH); + + tmp = *CR; + tmp &= POS_MASK(shift); + tmp |= mode << shift; + + *CR = tmp; +} -- cgit v1.2.3