Ken Sarkies
12 years ago
5 changed files with 86 additions and 187 deletions
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/** @defgroup gpio_file GPIO
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@ingroup STM32F2xx |
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@brief <b>libopencm3 STM32F2xx General Purpose I/O</b> |
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*/ |
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/*
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* This file is part of the libopencm3 project. |
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* |
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* This library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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#if defined(STM32F2) |
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#include <libopencm3/stm32/f2/gpio.h> |
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#elif defined(STM32F4) |
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#include <libopencm3/stm32/f4/gpio.h> |
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#elif defined(STM32L1) |
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#include <libopencm3/stm32/l1/gpio.h> |
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#else |
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#error "invalid/unknown stm32 family for this code" |
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#endif |
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void gpio_mode_setup(u32 gpioport, u8 mode, u8 pull_up_down, u16 gpios) |
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{ |
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u16 i; |
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u32 moder, pupd; |
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/*
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* We want to set the config only for the pins mentioned in gpios, |
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* but keeping the others, so read out the actual config first. |
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*/ |
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moder = GPIO_MODER(gpioport); |
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pupd = GPIO_PUPDR(gpioport); |
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for (i = 0; i < 16; i++) { |
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if (!((1 << i) & gpios)) |
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continue; |
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moder &= ~GPIO_MODE_MASK(i); |
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moder |= GPIO_MODE(i, mode); |
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pupd &= ~GPIO_PUPD_MASK(i); |
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pupd |= GPIO_PUPD(i, pull_up_down); |
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} |
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/* Set mode and pull up/down control registers. */ |
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GPIO_MODER(gpioport) = moder; |
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GPIO_PUPDR(gpioport) = pupd; |
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} |
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void gpio_set_output_options(u32 gpioport, u8 otype, u8 speed, u16 gpios) |
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{ |
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u16 i; |
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u32 ospeedr; |
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if (otype == 0x1) |
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GPIO_OTYPER(gpioport) |= gpios; |
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else |
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GPIO_OTYPER(gpioport) &= ~gpios; |
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ospeedr = GPIO_OSPEEDR(gpioport); |
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for (i = 0; i < 16; i++) { |
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if (!((1 << i) & gpios)) |
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continue; |
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ospeedr &= ~GPIO_OSPEED_MASK(i); |
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ospeedr |= GPIO_OSPEED(i, speed); |
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} |
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GPIO_OSPEEDR(gpioport) = ospeedr; |
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} |
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void gpio_set_af(u32 gpioport, u8 alt_func_num, u16 gpios) |
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{ |
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u16 i; |
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u32 afrl, afrh; |
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afrl = GPIO_AFRL(gpioport); |
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afrh = GPIO_AFRH(gpioport); |
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for (i = 0; i < 8; i++) { |
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if (!((1 << i) & gpios)) |
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continue; |
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afrl &= ~GPIO_AFR_MASK(i); |
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afrl |= GPIO_AFR(i, alt_func_num); |
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} |
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for (i = 8; i < 16; i++) { |
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if (!((1 << i) & gpios)) |
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continue; |
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afrh &= ~GPIO_AFR_MASK(i - 8); |
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afrh |= GPIO_AFR(i - 8, alt_func_num); |
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} |
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GPIO_AFRL(gpioport) = afrl; |
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GPIO_AFRH(gpioport) = afrh; |
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} |
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void gpio_set(u32 gpioport, u16 gpios) |
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{ |
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GPIO_BSRR(gpioport) = gpios; |
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} |
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void gpio_clear(u32 gpioport, u16 gpios) |
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{ |
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GPIO_BSRR(gpioport) = gpios << 16; |
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} |
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u16 gpio_get(u32 gpioport, u16 gpios) |
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{ |
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return gpio_port_read(gpioport) & gpios; |
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} |
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void gpio_toggle(u32 gpioport, u16 gpios) |
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{ |
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GPIO_ODR(gpioport) ^= gpios; |
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} |
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u16 gpio_port_read(u32 gpioport) |
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{ |
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return (u16)GPIO_IDR(gpioport); |
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} |
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void gpio_port_write(u32 gpioport, u16 data) |
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{ |
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GPIO_ODR(gpioport) = data; |
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} |
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void gpio_port_config_lock(u32 gpioport, u16 gpios) |
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{ |
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u32 reg32; |
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/* Special "Lock Key Writing Sequence", see datasheet. */ |
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GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */ |
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GPIO_LCKR(gpioport) = ~GPIO_LCKK & gpios; /* Clear LCKK. */ |
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GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */ |
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reg32 = GPIO_LCKR(gpioport); /* Read LCKK. */ |
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reg32 = GPIO_LCKR(gpioport); /* Read LCKK again. */ |
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/* Tell the compiler the variable is actually used. It will get optimized out anyways. */ |
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reg32 = reg32; |
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/* If (reg32 & GPIO_LCKK) is true, the lock is now active. */ |
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} |
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@ -0,0 +1,28 @@ |
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/** @defgroup gpio_file GPIO
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@ingroup STM32L1xx |
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@brief <b>libopencm3 STM32L1xx General Purpose I/O</b> |
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*/ |
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/*
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* This file is part of the libopencm3 project. |
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* |
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* This library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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#include <libopencm3/stm32/gpio.h> |
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#include <libopencm3/stm32/common/gpio_common_all.h> |
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