9557be1f25
Tested on Maple Mini with examples/mini-exti-test. Changes to Wirish are minor: use the new EXTI types exti_num and exti_cfg (see below) in place of now-deprecated variants in ext_interrupts.cpp. The way I originally did libmaple/exti.h was stupid, and fixing it turned out to be a little disruptive. libmaple/exti.h depends on libmaple/gpio.h (for AFIO), but that's a classic case of exposed implementation detail. So invert the dependency: make gpio.h depend on exti.h. Do this by adding exti_num and exti_cfg to exti.h; these respectively replace afio_exti_num and afio_exti_port. The afio_* variants are now deprecated. (Throw in a typedef and some macros at the bottom of the F1 series/gpio.h for backwards compatibility). Make exti_attach_interrupt() and exti_detach_interrupt() take exti_num/exti_cfg arguments instead of the afio_* variants. Make the EXTI dispatch routines __always_inline to defeat GCC -Os. Many renames throughout libmaple/stm32f1/ to stop using the deprecated names. Also move the previously F1-only gpio_exti_port() function into the public libmaple header. Reimplementing it in terms of rcc_clk_ids lets us deprecate the gpio_dev->exti_port field, which will save space in the future. While we're there, I notice that struct gpio_dev is defined once per series. That's dumb, as it misses the entire point of having device structs: they contain what's portable. So put the F1 version (which has the extra EXTI port field) into libmaple/gpio.h, and add the necessary exti_ports to libmaple/stm32f2/gpio.c. Sigh. We'll get rid of it eventually, at least. Clean up some other mistakes in gpio.h files as well (mostly removing util.h dependency). Sorry for the messy commit. For portability, add a new series-specific exti function, exti_select(). The F1 version in (new) libmaple/stm32f1/exti.c uses AFIO and some new private functionality in libmaple/exti.c and (new) libmaple/exti_private.h to make this convenient. We'll be able to do the SYSCFG equivalent on F2 without any trouble. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
195 lines
4.7 KiB
C
195 lines
4.7 KiB
C
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2011 LeafLabs, LLC.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @file libmaple/stm32f2/gpio.c
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* @brief STM32F2 GPIO.
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*/
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#include <libmaple/gpio.h>
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#include <libmaple/rcc.h>
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#include <libmaple/bitband.h>
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/*
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* GPIO devices
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*/
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gpio_dev gpioa = {
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.regs = GPIOA_BASE,
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.clk_id = RCC_GPIOA,
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.exti_port = EXTI_PA,
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};
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/** GPIO port A device. */
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gpio_dev* const GPIOA = &gpioa;
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gpio_dev gpiob = {
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.regs = GPIOB_BASE,
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.clk_id = RCC_GPIOB,
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.exti_port = EXTI_PB,
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};
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/** GPIO port B device. */
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gpio_dev* const GPIOB = &gpiob;
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gpio_dev gpioc = {
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.regs = GPIOC_BASE,
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.clk_id = RCC_GPIOC,
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.exti_port = EXTI_PC,
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};
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/** GPIO port C device. */
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gpio_dev* const GPIOC = &gpioc;
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gpio_dev gpiod = {
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.regs = GPIOD_BASE,
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.clk_id = RCC_GPIOD,
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.exti_port = EXTI_PD,
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};
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/** GPIO port D device. */
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gpio_dev* const GPIOD = &gpiod;
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gpio_dev gpioe = {
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.regs = GPIOE_BASE,
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.clk_id = RCC_GPIOE,
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.exti_port = EXTI_PE,
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};
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/** GPIO port E device. */
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gpio_dev* const GPIOE = &gpioe;
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gpio_dev gpiof = {
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.regs = GPIOF_BASE,
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.clk_id = RCC_GPIOF,
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.exti_port = EXTI_PF,
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};
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/** GPIO port F device. */
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gpio_dev* const GPIOF = &gpiof;
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gpio_dev gpiog = {
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.regs = GPIOG_BASE,
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.clk_id = RCC_GPIOG,
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.exti_port = EXTI_PG,
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};
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/** GPIO port G device. */
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gpio_dev* const GPIOG = &gpiog;
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gpio_dev gpioh = {
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.regs = GPIOH_BASE,
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.clk_id = RCC_GPIOH,
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.exti_port = EXTI_PH,
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};
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/** GPIO port G device. */
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gpio_dev* const GPIOH = &gpioh;
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gpio_dev gpioi = {
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.regs = GPIOI_BASE,
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.clk_id = RCC_GPIOI,
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.exti_port = EXTI_PI,
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};
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/** GPIO port G device. */
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gpio_dev* const GPIOI = &gpioi;
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/*
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* GPIO routines
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*/
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/**
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* Initialize and reset all available GPIO devices.
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*/
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void gpio_init_all(void) {
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gpio_init(GPIOA);
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gpio_init(GPIOB);
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gpio_init(GPIOC);
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gpio_init(GPIOD);
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gpio_init(GPIOE);
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gpio_init(GPIOF);
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gpio_init(GPIOG);
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gpio_init(GPIOH);
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gpio_init(GPIOI);
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}
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/**
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* @brief Set the mode of a GPIO pin.
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* @param dev GPIO device.
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* @param bit Bit on dev whose mode to set, 0--15.
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* @param mode Mode to set the pin to.
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* @param flags Flags to modify basic mode configuration
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*/
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void gpio_set_modef(gpio_dev *dev,
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uint8 bit,
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gpio_pin_mode mode,
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unsigned flags) {
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gpio_reg_map *regs = dev->regs;
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unsigned shift = bit * 2;
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uint32 tmp;
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/* Mode */
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tmp = regs->MODER;
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tmp &= ~(0x3 << shift);
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tmp |= mode << shift;
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regs->MODER = tmp;
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/* Output type */
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bb_peri_set_bit(®s->OTYPER, bit, flags & 0x1);
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/* Speed */
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tmp = regs->OSPEEDR;
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tmp &= ~(0x3 << shift);
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tmp |= ((flags >> 1) & 0x3) << shift;
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regs->OSPEEDR = tmp;
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/* Pull-up/pull-down */
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tmp = regs->PUPDR;
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tmp &= ~(0x3 << shift);
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tmp |= ((flags >> 3) & 0x3) << shift;
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regs->PUPDR = tmp;
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}
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/**
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* @brief Set a pin's alternate function.
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*
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* The pin must have its mode set to GPIO_MODE_AF for this to take
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* effect.
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*
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* @param dev Device whose pin to configure.
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* @param bit Pin whose alternate function to set.
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* @param af Alternate function to use for pin.
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* @see gpio_set_modef()
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*/
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void gpio_set_af(gpio_dev *dev, uint8 bit, gpio_af af) {
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__io uint32 *afr;
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unsigned shift;
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uint32 tmp;
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if (bit >= 8) {
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afr = &dev->regs->AFRH;
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shift = 4 * (bit - 8);
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} else{
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afr = &dev->regs->AFRL;
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shift = 4 * bit;
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}
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tmp = *afr;
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tmp &= ~(0xF << shift);
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tmp |= (af << shift);
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*afr = tmp;
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}
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