498 lines
19 KiB
C
498 lines
19 KiB
C
/************************************************************************************
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* arch/arm/src/stm32/stm32_gpio.h
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Copyright (C) 2011 Uros Platise. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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* Uros Platise <uros.platise@isotel.eu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_STM32_STM32_GPIO_H
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#define __ARCH_ARM_SRC_STM32_STM32_GPIO_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/irq.h>
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#include "chip.h"
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#if defined(CONFIG_STM32_STM32F10XX)
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# include "chip/stm32f10xxx_gpio.h"
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#elif defined(CONFIG_STM32_STM32F40XX)
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# include "chip/stm32f40xxx_gpio.h"
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#else
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# error "Unrecognized STM32 chip"
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#endif
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/************************************************************************************
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* Pre-Processor Declarations
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/* Bit-encoded input to stm32_configgpio() */
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#if defined(CONFIG_STM32_STM32F10XX)
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/* 16-bit Encoding:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* OFFS SX.. VPPP BBBB
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*/
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/* Output mode:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* O... .... .... ....
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*/
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#define GPIO_INPUT (1 << 15) /* Bit 15: 1=Input mode */
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#define GPIO_OUTPUT (0) /* 0=Output or alternate function */
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#define GPIO_ALT (0)
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/* If the pin is a GPIO digital output, then this identifies the initial output value.
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* If the pin is an input, this bit is overloaded to provide the qualifier to\
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* distinquish input pull-up and -down:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* .... .... V... ....
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*/
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#define GPIO_OUTPUT_SET (1 << 7) /* Bit 7: If output, inital value of output */
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#define GPIO_OUTPUT_CLEAR (0)
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/* These bits set the primary function of the pin:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* .FF. .... .... ....
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*/
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#define GPIO_CNF_SHIFT 13 /* Bits 13-14: GPIO function */
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#define GPIO_CNF_MASK (3 << GPIO_CNF_SHIFT)
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# define GPIO_CNF_ANALOGIN (0 << GPIO_CNF_SHIFT) /* Analog input */
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# define GPIO_CNF_INFLOAT (1 << GPIO_CNF_SHIFT) /* Input floating */
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# define GPIO_CNF_INPULLUD (2 << GPIO_CNF_SHIFT) /* Input pull-up/down general bit, since up is composed of two parts */
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# define GPIO_CNF_INPULLDWN (2 << GPIO_CNF_SHIFT) /* Input pull-down */
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# define GPIO_CNF_INPULLUP ((2 << GPIO_CNF_SHIFT) | GPIO_OUTPUT_SET) /* Input pull-up */
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# define GPIO_CNF_OUTPP (0 << GPIO_CNF_SHIFT) /* Output push-pull */
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# define GPIO_CNF_OUTOD (1 << GPIO_CNF_SHIFT) /* Output open-drain */
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# define GPIO_CNF_AFPP (2 << GPIO_CNF_SHIFT) /* Alternate function push-pull */
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# define GPIO_CNF_AFOD (3 << GPIO_CNF_SHIFT) /* Alternate function open-drain */
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/* Maximum frequency selection:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* ...S S... .... ....
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*/
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#define GPIO_MODE_SHIFT 11 /* Bits 11-12: GPIO frequency selection */
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#define GPIO_MODE_MASK (3 << GPIO_MODE_SHIFT)
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# define GPIO_MODE_INPUT (0 << GPIO_MODE_SHIFT) /* Input mode (reset state) */
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# define GPIO_MODE_10MHz (1 << GPIO_MODE_SHIFT) /* Output mode, max speed 10 MHz */
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# define GPIO_MODE_2MHz (2 << GPIO_MODE_SHIFT) /* Output mode, max speed 2 MHz */
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# define GPIO_MODE_50MHz (3 << GPIO_MODE_SHIFT) /* Output mode, max speed 50 MHz */
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/* External interrupt selection (GPIO inputs only):
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* .... .X.. .... ....
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*/
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#define GPIO_EXTI (1 << 10) /* Bit 10: Configure as EXTI interrupt */
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/* This identifies the GPIO port:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* .... .... .PPP ....
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*/
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#define GPIO_PORT_SHIFT 4 /* Bit 4-6: Port number */
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#define GPIO_PORT_MASK (7 << GPIO_PORT_SHIFT)
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# define GPIO_PORTA (0 << GPIO_PORT_SHIFT) /* GPIOA */
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# define GPIO_PORTB (1 << GPIO_PORT_SHIFT) /* GPIOB */
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# define GPIO_PORTC (2 << GPIO_PORT_SHIFT) /* GPIOC */
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# define GPIO_PORTD (3 << GPIO_PORT_SHIFT) /* GPIOD */
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# define GPIO_PORTE (4 << GPIO_PORT_SHIFT) /* GPIOE */
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# define GPIO_PORTF (5 << GPIO_PORT_SHIFT) /* GPIOF */
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# define GPIO_PORTG (6 << GPIO_PORT_SHIFT) /* GPIOG */
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/* This identifies the bit in the port:
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*
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* 1111 1100 0000 0000
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* 5432 1098 7654 3210
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* ---- ---- ---- ----
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* .... .... .... BBBB
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*/
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#define GPIO_PIN_SHIFT 0 /* Bits 0-3: GPIO number: 0-15 */
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#define GPIO_PIN_MASK (15 << GPIO_PIN_SHIFT)
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#define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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#define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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#define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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#define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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#define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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#define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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#define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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#define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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#define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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#define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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#define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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#define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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#define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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#define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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#define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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#define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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#elif defined(CONFIG_STM32_STM32F40XX)
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/* Each port bit of the general-purpose I/O (GPIO) ports can be individually configured
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* by software in several modes:
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*
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* - Input floating
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* - Input pull-up
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* - Input-pull-down
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* - Output open-drain with pull-up or pull-down capability
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* - Output push-pull with pull-up or pull-down capability
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* - Alternate function push-pull with pull-up or pull-down capability
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* - Alternate function open-drain with pull-up or pull-down capability
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* - Analog
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*
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* 20-bit Encoding: 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* Inputs: MMUU .... ...X PPPP BBBB
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* Outputs: MMUU .... FFOV PPPP BBBB
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* Alternate Functions: MMUU AAAA FFO. PPPP BBBB
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* Analog: MM.. .... .... PPPP BBBB
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*/
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/* Mode:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* MM.. .... .... .... ....
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*/
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#define GPIO_MODE_SHIFT (18) /* Bits 18-19: GPIO port mode */
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#define GPIO_MODE_MASK (3 << GPIO_MODE_SHIFT)
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#define GPIO_INPUT (0 << GPIO_MODE_SHIFT) /* Input mode */
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#define GPIO_OUTPUT (1 << GPIO_MODE_SHIFT) /* General purpose output mode */
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#define GPIO_ALT (2 << GPIO_MODE_SHIFT) /* Alternate function mode */
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#define GPIO_ANALOG (3 << GPIO_MODE_SHIFT) /* Analog mode */
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/* Input/output pull-ups/downs (not used with analog):
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* ..UU .... .... .... ....
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*/
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#define GPIO_PUPD_SHIFT (16) /* Bits 16-17: Pull-up/pull down */
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#define GPIO_PUPD_MASK (3 << GPIO_PUPD_SHIFT)
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# define GPIO_FLOAT (0 << GPIO_PUPD_SHIFT) /* No pull-up, pull-down */
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# define GPIO_PULLUP (1 << GPIO_PUPD_SHIFT) /* Pull-up */
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# define GPIO_PULLDOWN (2 << GPIO_PUPD_SHIFT) /* Pull-down */
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/* Alternate Functions:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... AAAA .... .... ....
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*/
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#define GPIO_AF_SHIFT (12) /* Bits 12-15: Alternate function */
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#define GPIO_AF_MASK (15 << GPIO_AF_SHIFT)
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# define GPIO_AF(n) ((n) << GPIO_AF_SHIFT)
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# define GPIO_AF0 (0 << GPIO_AF_SHIFT)
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# define GPIO_AF1 (1 << GPIO_AF_SHIFT)
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# define GPIO_AF2 (2 << GPIO_AF_SHIFT)
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# define GPIO_AF3 (3 << GPIO_AF_SHIFT)
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# define GPIO_AF4 (4 << GPIO_AF_SHIFT)
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# define GPIO_AF5 (5 << GPIO_AF_SHIFT)
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# define GPIO_AF6 (6 << GPIO_AF_SHIFT)
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# define GPIO_AF7 (7 << GPIO_AF_SHIFT)
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# define GPIO_AF8 (8 << GPIO_AF_SHIFT)
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# define GPIO_AF9 (9 << GPIO_AF_SHIFT)
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# define GPIO_AF10 (10 << GPIO_AF_SHIFT)
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# define GPIO_AF11 (11 << GPIO_AF_SHIFT)
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# define GPIO_AF12 (12 << GPIO_AF_SHIFT)
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# define GPIO_AF13 (13 << GPIO_AF_SHIFT)
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# define GPIO_AF14 (14 << GPIO_AF_SHIFT)
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# define GPIO_AF15 (15 << GPIO_AF_SHIFT)
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/* Output/Alt function frequency selection:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... FF.. .... ....
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*/
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#define GPIO_MODE_SHIFT (10) /* Bits 10-11: GPIO frequency selection */
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#define GPIO_MODE_MASK (3 << GPIO_MODE_SHIFT)
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# define GPIO_MODE_2MHz (0 << GPIO_MODE_SHIFT) /* 2 MHz Low speed output */
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# define GPIO_MODE_25MHz (1 << GPIO_MODE_SHIFT) /* 25 MHz Medium speed output */
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# define GPIO_MODE_20MHz (2 << GPIO_MODE_SHIFT) /* 50 MHz Fast speed output */
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# define GPIO_MODE_100MHz (3 << GPIO_MODE_SHIFT) /* 100 MHz High speed output */
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/* Output/Alt function type selection:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... ..O. .... ....
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*/
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#define GPIO_OPENDRAM (1 << 9) /* Bit9: 1=Open-drain output */
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#define GPIO_PUSHPULL (0) /* Bit9: 0=Push-pull output */
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/* If the pin is a GPIO digital output, then this identifies the initial output value.
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* If the pin is an input, this bit is overloaded to provide the qualifier to
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* distinquish input pull-up and -down:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... ...V .... ....
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*/
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#define GPIO_OUTPUT_SET (1 << 8) /* Bit 8: If output, inital value of output */
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#define GPIO_OUTPUT_CLEAR (0)
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/* External interrupt selection (GPIO inputs only):
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... ...X .... ....
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*/
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#define GPIO_EXTI (1 << 8) /* Bit 8: Configure as EXTI interrupt */
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/* This identifies the GPIO port:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... .... PPPP ....
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*/
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#define GPIO_PORT_SHIFT (4) /* Bit 4-7: Port number */
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#define GPIO_PORT_MASK (15 << GPIO_PORT_SHIFT)
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# define GPIO_PORTA (0 << GPIO_PORT_SHIFT) /* GPIOA */
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# define GPIO_PORTB (1 << GPIO_PORT_SHIFT) /* GPIOB */
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# define GPIO_PORTC (2 << GPIO_PORT_SHIFT) /* GPIOC */
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# define GPIO_PORTD (3 << GPIO_PORT_SHIFT) /* GPIOD */
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# define GPIO_PORTE (4 << GPIO_PORT_SHIFT) /* GPIOE */
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# define GPIO_PORTF (5 << GPIO_PORT_SHIFT) /* GPIOF */
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# define GPIO_PORTG (6 << GPIO_PORT_SHIFT) /* GPIOG */
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# define GPIO_PORTH (7 << GPIO_PORT_SHIFT) /* GPIOH */
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# define GPIO_PORTI (8 << GPIO_PORT_SHIFT) /* GPIOI */
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/* This identifies the bit in the port:
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*
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* 1111 1111 1100 0000 0000
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* 9876 5432 1098 7654 3210
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* ---- ---- ---- ---- ----
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* .... .... .... .... BBBB
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*/
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#define GPIO_PIN_SHIFT (0) /* Bits 0-3: GPIO number: 0-15 */
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#define GPIO_PIN_MASK (15 << GPIO_PIN_SHIFT)
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# define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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# define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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# define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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# define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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# define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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# define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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# define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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# define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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# define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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# define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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# define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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# define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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# define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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# define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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# define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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# define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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#else
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# error "Unrecognized STM32 chip"
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#endif
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_configgpio
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*
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* Description:
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* Configure a GPIO pin based on bit-encoded description of the pin.
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* Once it is configured as Alternative (GPIO_ALT|GPIO_CNF_AFPP|...)
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* function, it must be unconfigured with stm32_unconfiggpio() with
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* the same cfgset first before it can be set to non-alternative function.
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*
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* Returns:
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* OK on success
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* ERROR on invalid port, or when pin is locked as ALT function.
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*
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************************************************************************************/
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EXTERN int stm32_configgpio(uint32_t cfgset);
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/************************************************************************************
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* Name: stm32_unconfiggpio
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*
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* Description:
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* Unconfigure a GPIO pin based on bit-encoded description of the pin, set it
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* into default HiZ state (and possibly mark it's unused) and unlock it whether
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* it was previsouly selected as alternative function (GPIO_ALT|GPIO_CNF_AFPP|...).
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*
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* This is a safety function and prevents hardware from schocks, as unexpected
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* write to the Timer Channel Output GPIO to fixed '1' or '0' while it should
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* operate in PWM mode could produce excessive on-board currents and trigger
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* over-current/alarm function.
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*
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* Returns:
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* OK on success
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* ERROR on invalid port
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*
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************************************************************************************/
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EXTERN int stm32_unconfiggpio(uint32_t cfgset);
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/************************************************************************************
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* Name: stm32_gpiowrite
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*
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* Description:
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* Write one or zero to the selected GPIO pin
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*
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************************************************************************************/
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EXTERN void stm32_gpiowrite(uint32_t pinset, bool value);
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/************************************************************************************
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* Name: stm32_gpioread
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*
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* Description:
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* Read one or zero from the selected GPIO pin
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*
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************************************************************************************/
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EXTERN bool stm32_gpioread(uint32_t pinset);
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/************************************************************************************
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* Name: stm32_gpiosetevent
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*
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* Description:
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* Sets/clears GPIO based event and interrupt triggers.
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*
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* Parameters:
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* - pinset: gpio pin configuration
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* - rising/falling edge: enables
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* - event: generate event when set
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* - func: when non-NULL, generate interrupt
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*
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* Returns:
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* The previous value of the interrupt handler function pointer. This value may,
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* for example, be used to restore the previous handler when multiple handlers are
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* used.
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*
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************************************************************************************/
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EXTERN xcpt_t stm32_gpiosetevent(uint32_t pinset, bool risingedge, bool fallingedge,
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bool event, xcpt_t func);
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/************************************************************************************
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* Function: stm32_dumpgpio
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*
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* Description:
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* Dump all GPIO registers associated with the provided base address
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*
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************************************************************************************/
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#ifdef CONFIG_DEBUG
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EXTERN int stm32_dumpgpio(uint32_t pinset, const char *msg);
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#else
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# define stm32_dumpgpio(p,m)
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#endif
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|
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|
/************************************************************************************
|
|
* Function: stm32_gpioinit
|
|
*
|
|
* Description:
|
|
* Based on configuration within the .config file, it does:
|
|
* - Remaps positions of alternative functions.
|
|
*
|
|
* Typically called from stm32_start().
|
|
************************************************************************************/
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|
|
|
EXTERN void stm32_gpioinit(void);
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|
|
|
#undef EXTERN
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
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|
#endif /* __ARCH_ARM_SRC_STM32_STM32_GPIO_H */
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