diff --git a/configs/stm32f103-minimum/src/Makefile b/configs/stm32f103-minimum/src/Makefile index ff51903c02..b8f5c1f3d8 100644 --- a/configs/stm32f103-minimum/src/Makefile +++ b/configs/stm32f103-minimum/src/Makefile @@ -53,6 +53,10 @@ else CSRCS += stm32_userleds.c endif +ifeq ($(CONFIG_DEV_GPIO),y) +CSRCS += stm32_gpio.c +endif + ifeq ($(CONFIG_PWM),y) CSRCS += stm32_pwm.c endif diff --git a/configs/stm32f103-minimum/src/stm32_bringup.c b/configs/stm32f103-minimum/src/stm32_bringup.c index 00c9f89e0a..1d2542f0a4 100644 --- a/configs/stm32f103-minimum/src/stm32_bringup.c +++ b/configs/stm32f103-minimum/src/stm32_bringup.c @@ -112,6 +112,15 @@ int stm32_bringup(void) #endif int ret = OK; +#ifdef CONFIG_DEV_GPIO + ret = stm32_gpio_initialize(); + if (ret < 0) + { + syslog(LOG_ERR, "Failed to initialize GPIO Driver: %d\n", ret); + return ret; + } +#endif + #ifdef CONFIG_MMCSD ret = stm32_mmcsd_initialize(MMCSD_MINOR); if (ret < 0) diff --git a/configs/stm32f103-minimum/src/stm32_gpio.c b/configs/stm32f103-minimum/src/stm32_gpio.c new file mode 100644 index 0000000000..03c0e1da0b --- /dev/null +++ b/configs/stm32f103-minimum/src/stm32_gpio.c @@ -0,0 +1,305 @@ +/**************************************************************************** + * configs/stm32f103-minimum/src/stm32_gpio.c + * + * Copyright (C) 2017 Gregory Nutt. All rights reserved. + * Copyright (C) 2017 Alan Carvalho de Assis. All rights reserved. + * Author: Alan Carvalho de Assis + * + * Based on: configs/sim/src/sim_gpio.c + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include + +#include +#include +#include + +#include + +#include "chip.h" +#include "stm32.h" +#include "stm32f103_minimum.h" + +#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct stm32gpio_dev_s +{ + struct gpio_dev_s gpio; + uint8_t id; + bool value; +}; + +struct stm32gpint_dev_s +{ + struct stm32gpio_dev_s stm32gpio; + pin_interrupt_t callback; +}; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value); +static int gpout_write(FAR struct gpio_dev_s *dev, bool value); +static int gpint_attach(FAR struct gpio_dev_s *dev, + pin_interrupt_t callback); +static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static const struct gpio_operations_s gpin_ops = +{ + .go_read = gpin_read, + .go_write = NULL, + .go_attach = NULL, + .go_enable = NULL, +}; + +static const struct gpio_operations_s gpout_ops = +{ + .go_read = gpin_read, + .go_write = gpout_write, + .go_attach = NULL, + .go_enable = NULL, +}; + +static const struct gpio_operations_s gpint_ops = +{ + .go_read = gpin_read, + .go_write = NULL, + .go_attach = gpint_attach, + .go_enable = gpint_enable, +}; + +#if BOARD_NGPIOIN > 0 +/* This array maps the GPIO pins used as INPUT */ + +static const uint32_t g_gpioinputs[BOARD_NGPIOIN] = +{ + GPIO_IN1, +}; + +static struct stm32gpio_dev_s g_gpin[BOARD_NGPIOIN]; +#endif + +#if BOARD_NGPIOOUT +/* This array maps the GPIO pins used as OUTPUT */ + +static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] = +{ + GPIO_OUT1, +}; + +static struct stm32gpio_dev_s g_gpout[BOARD_NGPIOOUT]; +#endif + +#if BOARD_NGPIOINT > 0 +/* This array maps the GPIO pins used as INTERRUPT INPUTS */ + +static const uint32_t g_gpiointinputs[BOARD_NGPIOINT] = +{ + GPIO_INT1, +}; + +static struct stm32gpint_dev_s g_gpint[BOARD_NGPIOINT]; +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +static int stm32gpio_interrupt(int irq, void *context, void *arg) +{ + FAR struct stm32gpint_dev_s *stm32gpint = (FAR struct stm32gpint_dev_s *)arg; + + DEBUGASSERT(stm32gpint != NULL && stm32gpint->callback != NULL); + gpioinfo("Interrupt! callback=%p\n", stm32gpint->callback); + + stm32gpint->callback(&stm32gpint->stm32gpio.gpio); + return OK; +} + +static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value) +{ + FAR struct stm32gpio_dev_s *stm32gpio = (FAR struct stm32gpio_dev_s *)dev; + + DEBUGASSERT(stm32gpio != NULL && value != NULL); + gpioinfo("Reading...\n"); + + *value = stm32_gpioread(g_gpioinputs[stm32gpio->id]); + return OK; +} + +static int gpout_write(FAR struct gpio_dev_s *dev, bool value) +{ + FAR struct stm32gpio_dev_s *stm32gpio = (FAR struct stm32gpio_dev_s *)dev; + + DEBUGASSERT(stm32gpio != NULL); + gpioinfo("Writing %d\n", (int)value); + + stm32_gpiowrite(g_gpiooutputs[stm32gpio->id], value); + return OK; +} + +static int gpint_attach(FAR struct gpio_dev_s *dev, + pin_interrupt_t callback) +{ + FAR struct stm32gpint_dev_s *stm32gpint = (FAR struct stm32gpint_dev_s *)dev; + + gpioinfo("Attaching the callback\n"); + + /* Make sure the interrupt is disabled */ + + (void)stm32_gpiosetevent(g_gpiointinputs[stm32gpint->stm32gpio.id], false, + false, false, NULL, NULL); + + gpioinfo("Attach %p\n", callback); + stm32gpint->callback = callback; + return OK; +} + +static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable) +{ + FAR struct stm32gpint_dev_s *stm32gpint = (FAR struct stm32gpint_dev_s *)dev; + + if (enable) + { + if (stm32gpint->callback != NULL) + { + gpioinfo("Enabling the interrupt\n"); + + /* Configure the interrupt for rising edge */ + + (void)stm32_gpiosetevent(g_gpiointinputs[stm32gpint->stm32gpio.id], + true, false, false, stm32gpio_interrupt, + &g_gpint[stm32gpint->stm32gpio.id]); + + } + } + else + { + gpioinfo("Disable the interrupt\n"); + (void)stm32_gpiosetevent(g_gpiointinputs[stm32gpint->stm32gpio.id], + false, false, false, NULL, NULL); + } + + return OK; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stm32_gpio_initialize + * + * Description: + * Initialize GPIO drivers for use with /apps/examples/gpio + * + ****************************************************************************/ + +int stm32_gpio_initialize(void) +{ + int i; + int pincount = 0; + +#if BOARD_NGPIOIN > 0 + for (i = 0; i < BOARD_NGPIOIN; i++) + { + /* Setup and register the GPIO pin */ + + g_gpin[i].gpio.gp_pintype = GPIO_INPUT_PIN; + g_gpin[i].gpio.gp_ops = &gpin_ops; + g_gpin[i].id = i; + (void)gpio_pin_register(&g_gpin[i].gpio, pincount); + + /* Configure the pin that will be used as input */ + + stm32_configgpio(g_gpioinputs[i]); + + pincount++; + } +#endif + +#if BOARD_NGPIOOUT > 0 + for (i = 0; i < BOARD_NGPIOOUT; i++) + { + /* Setup and register the GPIO pin */ + + g_gpout[i].gpio.gp_pintype = GPIO_OUTPUT_PIN; + g_gpout[i].gpio.gp_ops = &gpout_ops; + g_gpout[i].id = i; + (void)gpio_pin_register(&g_gpout[i].gpio, pincount); + + /* Configure the pin that will be used as output */ + + stm32_configgpio(g_gpiooutputs[i]); + + pincount++; + } +#endif + +#if BOARD_NGPIOINT > 0 + for (i = 0; i < BOARD_NGPIOINT; i++) + { + /* Setup and register the GPIO pin */ + + g_gpint[i].stm32gpio.gpio.gp_pintype = GPIO_INTERRUPT_PIN; + g_gpint[i].stm32gpio.gpio.gp_ops = &gpint_ops; + g_gpint[i].stm32gpio.id = i; + (void)gpio_pin_register(&g_gpint[i].stm32gpio.gpio, pincount); + + /* Configure the pin that will be used as interrupt input */ + + stm32_configgpio(g_gpiointinputs[i]); + + pincount++; + } +#endif + + return 0; +} +#endif /* CONFIG_DEV_GPIO && !CONFIG_GPIO_LOWER_HALF */ diff --git a/configs/stm32f103-minimum/src/stm32f103_minimum.h b/configs/stm32f103-minimum/src/stm32f103_minimum.h index ada0a38f74..17c2e4c5e0 100644 --- a/configs/stm32f103-minimum/src/stm32f103_minimum.h +++ b/configs/stm32f103-minimum/src/stm32f103_minimum.h @@ -129,6 +129,18 @@ #define GPIO_USB_PULLUP (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\ GPIO_OUTPUT_SET|GPIO_PORTC|GPIO_PIN13) +/* GPIO pins used by the GPIO Subsystem */ + +#define BOARD_NGPIOIN 1 /* Amount of GPIO Input pins */ +#define BOARD_NGPIOOUT 1 /* Amount of GPIO Output pins */ +#define BOARD_NGPIOINT 1 /* Amount of GPIO Input w/ Interruption pins */ + +#define GPIO_IN1 (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_PORTA|GPIO_PIN0) +#define GPIO_OUT1 (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\ + GPIO_OUTPUT_SET|GPIO_PORTA|GPIO_PIN1) + +#define GPIO_INT1 (GPIO_INPUT|GPIO_CNF_INFLOAT|GPIO_PORTA|GPIO_PIN2) + /************************************************************************************ * Public Functions ************************************************************************************/ @@ -155,6 +167,18 @@ int stm32_bringup(void); +/**************************************************************************** + * Name: stm32_gpio_initialize + * + * Description: + * Initialize GPIO drivers for use with /apps/examples/gpio + * + ****************************************************************************/ + +#ifdef CONFIG_DEV_GPIO +int stm32_gpio_initialize(void); +#endif + /************************************************************************************ * Name: stm32_spidev_initialize *